@article{choi_dalton_peszlen_pourghaz_2024, title={The impacts of CaCO3 deposition in natural wood on its viscoelastic properties}, volume={275}, ISSN={["1879-1069"]}, url={https://doi.org/10.1016/j.compositesb.2024.111324}, DOI={10.1016/j.compositesb.2024.111324}, abstractNote={In this study, we discuss the methods used for depositing calcium carbonate (CaCO3) and the resulting 2D and 3D particle distributions of CaCO3 in two types of wood, which were quantified using scanning electron microscopy (SEM) and X-ray computed tomography (CT). We also present the results of dynamic mechanical analysis (DMA), which was used to measure the impact of CaCO3 deposition on the viscoelastic properties of the wood. X-ray CT scanning showed that CaCO3 deposits inside the wood scaffold with increased amounts as the deposition cycles were iterated. However, DMA results did not indicate significant improvement in storage moduli (E′) of CaCO3 deposited wood. SEM images revealed that the particles did not fill all the voids to provide stress transfer between the wood scaffold and the particles, indicating a lack of composite action between the wood and CaCO3 components. To address this issue, we hypothesized that heat-pressing would lead to a mechanical bond between the particles and the matrix. After heat-pressing, DMA results showed a dramatic increase in E′ not only in CaCO3 deposited wood samples but also in control wood samples. In other words, the densification of the structure led to significant increases in E′, primarily due to densification, while the impact of the presence of CaCO3 particles was minimal. This is mainly because the volume fraction of the deposited CaCO3 particles is small as compared to the total volume of the composite.}, journal={COMPOSITES PART B-ENGINEERING}, author={Choi, Hyunjun and Dalton, Laura E. and Peszlen, Ilona and Pourghaz, Moe}, year={2024}, month={Apr} } @article{sulis_jiang_yang_marques_matthews_miller_lan_cofre-vega_liu_sun_et al._2023, title={Multiplex CRISPR editing of wood for sustainable fiber production}, volume={381}, ISSN={["1095-9203"]}, url={http://europepmc.org/abstract/med/37440632}, DOI={10.1126/science.add4514}, abstractNote={The domestication of forest trees for a more sustainable fiber bioeconomy has long been hindered by the complexity and plasticity of lignin, a biopolymer in wood that is recalcitrant to chemical and enzymatic degradation. Here, we show that multiplex CRISPR editing enables precise woody feedstock design for combinatorial improvement of lignin composition and wood properties. By assessing every possible combination of 69,123 multigenic editing strategies for 21 lignin biosynthesis genes, we deduced seven different genome editing strategies targeting the concurrent alteration of up to six genes and produced 174 edited poplar variants. CRISPR editing increased the wood carbohydrate-to-lignin ratio up to 228% that of wild type, leading to more-efficient fiber pulping. The edited wood alleviates a major fiber-production bottleneck regardless of changes in tree growth rate and could bring unprecedented operational efficiencies, bioeconomic opportunities, and environmental benefits.}, number={6654}, journal={SCIENCE}, author={Sulis, Daniel B. and Jiang, Xiao and Yang, Chenmin and Marques, Barbara M. and Matthews, Megan L. and Miller, Zachary and Lan, Kai and Cofre-Vega, Carlos and Liu, Baoguang and Sun, Runkun and et al.}, year={2023}, month={Jul}, pages={216-+} } @article{kumar_zambrano_peszlen_venditti_pawlak_jameel_gonzalez_2022, title={High-performance sustainable tissue paper from agricultural residue: a case study on fique fibers from Colombia}, volume={6}, ISSN={["1572-882X"]}, DOI={10.1007/s10570-022-04687-3}, abstractNote={Global sustainability megatrends are promoting the utilization of sustainably perceived fibers such as recycled and agricultural residue fibers in hygiene tissue applications. Tissue paper products advertised as sustainable have higher prices and inferior performance than conventional products manufactured from virgin wood fibers. This work demonstrates the feasibility of using agricultural residues from fique plantations (Furcraea microphylla genus) as an alternative to Northern Bleached Softwood Fibers (NBSK) in high-performance hygiene tissue applications. For our study, fiber residues were mechanically cleaned and upgraded to a tissue pulp using a simple pulping and bleaching process. A complete characterization of tissue paper properties (bulk, softness, water absorbency, tensile strength) was performed and compared against the NBSK market pulp. Additionally, fique residue pulp was blended with Bleached Eucalyptus Kraft (BEK) to match the performance of a selected benchmark consisting of 70% BEK and 30% NBSK. Results indicate fique residue bleached pulp has similar fiber morphology and comparable strength properties in terms of the tensile strength (+ 6%) and tear strength (+ 10%), but superior bulk (+ 12%), water absorbency (+ 28%), and softness (−29% TS7 values) than NBSK pulp. A fiber blend of 70% BEK and 30% fique residue showed superior tensile strength (+ 21%), tear strength (+ 54%), bulk (+ 5.5%), water absorbency (+ 1.5%), and softness (−8.7% TS7 values) over a similar fiber blend of BEK and NBSK. Our findings demonstrate that fibers from fique residue can substitute NBSK in hygiene tissue applications. Upgrading residues from fique fibers as raw materials for the tissue industry can bridge the gap between sustainability and product performance, simultaneously opening the possibility of new revenue streams for millions of small farmers in the producing countries.}, journal={CELLULOSE}, author={Kumar, Rajnish and Zambrano, Franklin and Peszlen, Ilona and Venditti, Richard and Pawlak, Joel and Jameel, Hasan and Gonzalez, Ronalds}, year={2022}, month={Jun} } @article{frazier_zambrano_pawlak_peszlen_welsford_gonzalez_2022, title={The tissue dust analysis system: a new device and methodology to quantify dusting and linting propensity in hygiene tissue papers}, volume={8}, ISSN={["1572-882X"]}, url={https://doi.org/10.1007/s10570-022-04779-0}, DOI={10.1007/s10570-022-04779-0}, abstractNote={Paper dusting, which occurs when a tissue web releases unbound and loosely bound fibers or filler particles during tissue-making or product manufacturing, has an overall negative impact, causing safety hazards, machine runnability difficulties, and product quality issues. To date, there are no well-established industry standards to quantify dusting/linting propensities in finished tissue products, thus evaluating the effectiveness of dust/lint control programs is challenging yet intriguing. This research aims to fill this gap by developing a methodology to characterize dusting in tissue papers. We have developed a device prototype (named the Tissue Dust Collector) and a methodology that together have been named the Tissue Dust Analysis System (TDAS), which aims at quantifying the propensity for tissue-grade paper products to generate dust/lint in a controlled and reproducible manner. Two samples, corresponding to commercial products with a low and high linting propensity, were tested using the proposed device and methodology, and the released particles were quantified and characterized. The device and methodology provided reproducible results for simulated consumer handling and product manufacturing scenarios. By changing the instrument's motor frequency, the force of agitation changes, mimicking/simulating consumer (60 strokes per min, spm) and producer/manufacturing (180 spm) handling scenarios (though manufacturing processes are much faster in practice). Particle counts at each level for each product showed reproducible values differentiable at different agitation levels. Adopting the proposed Tissue Dust Analysis System may help to characterize and understand the mechanisms behind dusting to create dust-control strategies that can alleviate this issue at its various sources or simply allow tissue paper manufacturers to compare and advertise their products based on dusting propensity.}, journal={CELLULOSE}, author={Frazier, Ryen and Zambrano, Franklin and Pawlak, Joel J. and Peszlen, Ilona and Welsford, David and Gonzalez, Ronalds}, year={2022}, month={Aug} } @inproceedings{peszlen_miller_peralta_2022, title={Wood Properties of CRISPR Gene-edited Poplar}, booktitle={SWST International Convention}, author={Peszlen, Ilona and Miller, Zachary and Peralta, Perry}, year={2022} } @inproceedings{peszlen_peralta_wang_chiang_kelly_2021, title={Bacterial degradation of the cell wall of transgenic poplar with modified lignin content and composition}, booktitle={Society of Wood Science and Technology 2021 International Convention}, author={Peszlen, I. and Peralta, P. and Wang, J. and Chiang, V. and Kelly, R.}, year={2021} } @article{grans_isik_purnell_peszlen_mckeand_2021, title={Genetic Variation and the Effect of Herbicide and Fertilization Treatments on Wood Quality Traits in Loblolly Pine}, volume={67}, ISSN={["1938-3738"]}, url={https://doi.org/10.1093/forsci/fxab026}, DOI={10.1093/forsci/fxab026}, abstractNote={Abstract The effect of silvicultural treatments (herbicide, fertilization, herbicide + fertilization) and the interactions with genetic effects were investigated for wood quality traits in a 16-year-old loblolly pine (Pinus taeda L.) genetic test established in southwest Georgia, USA. Fertilizer and herbicide treatment combinations were applied multiple times to main plots containing 25 open-pollinated families as sub plots. Significant differences among treatments were found for all traits. Squared acoustic velocity, used as a surrogate for wood stiffness, was higher in herbicide-only plots compared with other treatments. Wood density was considerably lower in fertilization plots. A large proportion of variance observed for wood quality traits was explained by additive genetic effects, with individual-tree heritabilities ranging from 0.78 (ring 7–16 section wood density) to 0.28 (ring 2–6 section wood density). Corresponding family-mean heritability values were well over 0.86. Genotype-by-treatment interactions were nonsignificant for all traits, indicating no need to match families to silvicultural treatments. Wood quality traits had weak genetic correlations with growth and stem quality traits (stem slenderness, sweep, and branch angle) with a range of −0.33 to 0.43, suggesting that recurrent selection on growth or stem quality traits would not adversely affect wood quality in loblolly pine.}, number={5}, journal={FOREST SCIENCE}, publisher={Oxford University Press (OUP)}, author={Grans, Daniel and Isik, Fikret and Purnell, Robert C. and Peszlen, Ilona M. and McKeand, Steven E.}, year={2021}, month={Oct}, pages={564–573} } @inproceedings{kumar_peszlen_gonzales_2021, title={High-Performance Sustainable Tissue Paper from Residue of Decorticated Nonwood Fique Fibers}, booktitle={SWST International Convention}, author={Kumar, Rajnish and Peszlen, Ilona and Gonzales, Ronalds}, year={2021} } @inproceedings{peralta_peszlen_2021, title={Pathways to Sustainable Materials Science and Engineering: Enhancing College and Career Opportunities for Minority Women From Rural North Carolina}, booktitle={Society of Wood Science and Technology 2021 International Convention}, author={Peralta, P. and Peszlen, I.}, year={2021} } @inproceedings{peralta_peszlen_2021, title={Plant-Based Materials Selection}, booktitle={Society of Wood Science and Technology 2021 International Convention}, author={Peralta, P. and Peszlen, I.}, year={2021} } @inproceedings{peralta_peszlen_2021, title={Sustainable Materials Science and Technology, A Defining Discipline of Our Time}, booktitle={Society of Wood Science and Technology 2021 International Convention}, author={Peralta, P. and Peszlen, I.}, year={2021} } @article{edmunds_peralta_sharma-shivappa_kelley_chiang_miller_giles_sykes_deoppke_gjersing_et al._2020, title={Fungal Pretreatment and Enzymatic Hydrolysis of Genetically-modified Populus trichocarpa}, volume={15}, ISSN={["1930-2126"]}, DOI={10.15376/biores.15.3.6488-6505}, abstractNote={Fungal pretreatment of Populus trichocarpa wood genetically modified to reduce lignin and alter lignin chemistry is investigated for its effectiveness as an alternative to common pretreatment methods. The goal of this work is to improve biomass utilization for biofuel and biochemical applications by increasing sugar release. Sugar release after enzymatic hydrolysis was measured after various biomass pretreatments (including wood-rot fungus, hot water, and dilute acid). In the wildtype, and in constructs downregulated in PAL, 4CL, and C3H, the fungal pretreatment resulted in substantial improvements in sugar yields, up to 2.4-fold increase in glucose yield and 6-fold increase in xylose yield after enzymatic hydrolysis compared to the unpretreated control. However, the effects of fungal pretreatment were inconsistent, and in genetic lines down-regulated in 4CL, CCoAOMT, CAld5H, and C3H, fungal pretreatment yielded similar or decreased sugar release after enzymatic hydrolysis.}, number={3}, journal={BIORESOURCES}, author={Edmunds, Charles W. and Peralta, Perry and Sharma-Shivappa, Ratna R. and Kelley, Stephen S. and Chiang, Vincent L. and Miller, Zachary D. and Giles, Richard L. and Sykes, Robert W. and Deoppke, Crissa and Gjersing, Erica and et al.}, year={2020}, month={Aug}, pages={6488–6505} } @article{miller_peralta_mitchell_kelley_chiang_pearson_rottmann_cunningham_peszlen_2019, title={ANATOMICAL, PHYSICAL, AND MECHANICAL PROPERTIES OF TRANSGENIC LOBLOLLY PINE (PINUS TAEDA L.) MODIFIED FOR INCREASED DENSITY}, volume={51}, ISSN={["0735-6161"]}, DOI={10.22382/wfs-2019-018}, abstractNote={Traditional breeding methods are often constrained by the reproductive cycles of tree species and the difficulty in achieving significant improvements to complex traits; therefore, genetic manipulation of complex traits such as wood properties has the potential to resolve those issues. The objectives of this study were to analyze MOE, MOR, and the physical and anatomical properties of 2- to 3-yr-old field-grown transgenic Pinus taeda trees modified for increased density. This investigation consisted of a total of 55 sample trees in two separate experiments. Transgenic trees from sets OX41 and OX55, modified for increased density using two variants of the same HAP5 gene, exhibited higher mechanical properties with smaller stem diameter and tracheid lumen diameter than their set of control trees. In addition, set OX55 exhibited increased cell wall thickness. In the second experiment, the transgenic group WVK249, modified for higher density using an unrelated MYB gene, exhibited similar diameter growth and increased cell wall thickness and lower lumen/cell wall ratios but no change in mechanical properties compared with its control.}, number={2}, journal={WOOD AND FIBER SCIENCE}, author={Miller, Z. D. and Peralta, P. N. and Mitchell, P. H. and Kelley, S. S. and Chiang, V. L. and Pearson, L. and Rottmann, W. H. and Cunningham, M. W. and Peszlen, I. M.}, year={2019}, month={Apr}, pages={173–182} } @article{miller_peralta_mitchell_chiang_kelley_edmunds_peszlen_2019, title={Anatomy and Chemistry of Populus trichocarpa with Genetically Modified Lignin Content}, volume={14}, ISSN={["1930-2126"]}, DOI={10.15376/biores.14.3.5729-5746}, abstractNote={Vessel and fiber properties, diameter growth, and chemical compositions were investigated for transgenic Populus trichocarpa (black cottonwood) trees harvested after six months of growth in a greenhouse. Genetic modifications were cinnamyl alcohol dehydrogenase (CAD), cinnamate 3-hydroxylase (C3H), or cinnamate 4-hydroxylase (C4H), which resulted in modified lignin composition or content, and changed the syringyl-to-guaiacyl ratio. Comparing the genetic groups to the wild-type as the control, trees with reduced lignin content showed different results for vessel and fiber properties measured. Genetic groups with reduced PtrC3H3 and PtrC4H1&2 (with lower lignin content and higher S/G ratio than the control) exhibited splitting perpendicular to the rays, yet had the same fiber lumen diameter and the same fiber cell wall thickness as the control. Changes in lignin structure from modifications to PtrCAD resulted in reductions to the number of vessels, increases in vessel and fiber diameters, and had no consistent impact on stem diameter.}, number={3}, journal={BIORESOURCES}, author={Miller, Zachary D. and Peralta, Perry N. and Mitchell, Phil and Chiang, Vincent L. and Kelley, Stephen S. and Edmunds, Charles W. and Peszlen, Ilona M.}, year={2019}, month={Aug}, pages={5729–5746} } @inproceedings{peszlen_xiang_peralta_2019, title={Cell Morphology and Mechanical Properties of Transgenic Poplar with Reduced Cellulose Content}, booktitle={Society of Wood Science and Technology 2019 International Convention}, author={Peszlen, Ilona and Xiang, Zhouyang and Peralta, Perry}, year={2019} } @inproceedings{dick_peralta_mitchell_peszlen_2019, title={Comparison of Small- and Intermediate-Scale Fire Performance Tests of Southern Pine Cross-Laminated Timber}, booktitle={Society of Wood Science and Technology 2019 International Convention}, author={Dick, Bryan and Peralta, Perry and Mitchell, Phil and Peszlen, Ilona}, year={2019} } @article{abbas_peszlen_shi_kim_katahira_kafle_xiang_huang_min_mohamadamin_et al._2020, title={Involvement of CesA4, CesA7-A/B and CesA8-A/B in secondary wall formation in Populus trichocarpa wood}, volume={40}, ISSN={1758-4469}, url={http://dx.doi.org/10.1093/treephys/tpz020}, DOI={10.1093/treephys/tpz020}, abstractNote={Abstract Cellulose synthase A genes (CesAs) are responsible for cellulose biosynthesis in plant cell walls. In this study, functions of secondary wall cellulose synthases PtrCesA4, PtrCesA7-A/B and PtrCesA8-A/B were characterized during wood formation in Populus trichocarpa (Torr. & Gray). CesA RNAi knockdown transgenic plants exhibited stunted growth, narrow leaves, early necrosis, reduced stature, collapsed vessels, thinner fiber cell walls and extended fiber lumen diameters. In the RNAi knockdown transgenics, stems exhibited reduced mechanical strength, with reduced modulus of rupture (MOR) and modulus of elasticity (MOE). The reduced mechanical strength may be due to thinner fiber cell walls. Vessels in the xylem of the transgenics were collapsed, indicating that water transport in xylem may be affected and thus causing early necrosis in leaves. A dramatic decrease in cellulose content was observed in the RNAi knockdown transgenics. Compared with wildtype, the cellulose content was significantly decreased in the PtrCesA4, PtrCesA7 and PtrCesA8 RNAi knockdown transgenics. As a result, lignin and xylem contents were proportionally increased. The wood composition changes were confirmed by solid-state NMR, two-dimensional solution-state NMR and sum-frequency-generation vibration (SFG) analyses. Both solid-state nuclear magnetic resonance (NMR) and SFG analyses demonstrated that knockdown of PtrCesAs did not affect cellulose crystallinity index. Our results provided the evidence for the involvement of PtrCesA4, PtrCesA7-A/B and PtrCesA8-A/B in secondary cell wall formation in wood and demonstrated the pleiotropic effects of their perturbations on wood formation.}, number={1}, journal={Tree Physiology}, publisher={Oxford University Press (OUP)}, author={Abbas, Manzar and Peszlen, Ilona and Shi, Rui and Kim, Hoon and Katahira, Rui and Kafle, Kabindra and Xiang, Zhouyang and Huang, Xiong and Min, Douyng and Mohamadamin, Makarem and et al.}, editor={Plomion, ChristopheEditor}, year={2020}, month={Jan}, pages={73–89} } @article{straub_khatibi_wang_conway_williams-rhaesa_peszlen_chiang_adams_kelly_2019, title={Quantitative fermentation of unpretreated transgenic poplar by Caldicellulosiruptor bescii}, volume={10}, ISSN={["2041-1723"]}, url={https://doi.org/10.1038/s41467-019-11376-6}, DOI={10.1038/s41467-019-11376-6}, abstractNote={AbstractMicrobial fermentation of lignocellulosic biomass to produce industrial chemicals is exacerbated by the recalcitrant network of lignin, cellulose and hemicelluloses comprising the plant secondary cell wall. In this study, we show that transgenic poplar (Populus trichocarpa) lines can be solubilized without any pretreatment by the extreme thermophile Caldicellulosiruptor bescii that has been metabolically engineered to shift its fermentation products away from inhibitory organic acids to ethanol. Carbohydrate solubilization and conversion of unpretreated milled biomass is nearly 90% for two transgenic lines, compared to only 25% for wild-type poplar. Unexpectedly, unpretreated intact poplar stems achieved nearly 70% of the fermentation production observed with milled poplar as the substrate. The nearly quantitative microbial conversion of the carbohydrate content of unpretreated transgenic lignocellulosic biomass bodes well for full utilization of renewable biomass feedstocks.}, number={1}, journal={NATURE COMMUNICATIONS}, publisher={Springer Science and Business Media LLC}, author={Straub, Christopher T. and Khatibi, Piyum A. and Wang, Jack P. and Conway, Jonathan M. and Williams-Rhaesa, Amanda M. and Peszlen, Ilona M. and Chiang, Vincent L. and Adams, Michael W. W. and Kelly, Robert M.}, year={2019}, month={Aug} } @article{edmunds_peszlen_chiang_kelley_miller_davis_gjersing_peralta_2019, title={Thermo-mechanical Behavior of Genetically Modified Populus trichocarpa}, volume={14}, ISSN={["1930-2126"]}, DOI={10.15376/biores.14.2.4760-4773}, abstractNote={Wood processing is often performed at elevated temperatures under moisture-saturated conditions; therefore, it is important to understand the impact of the lignin content and lignin chemical structure on the thermo-mechanical properties of wood. In this study, genetically modified Populus trichocarpa wood specimens with down-regulated cinnamyl alcohol dehydrogenase, cinnamate 3-hydroxylase, and cinnamate 4-hydroxylase with altered lignin contents and/or lignin structures were utilized to probe the relationship between the lignin content, lignin monomer composition, and thermo-mechanical properties of solid wood. The thermo-mechanical properties of these unique samples were measured using dynamic mechanical analysis and the nuclear magnetic resonance (NMR) spin-spin relaxation time. The results showed that the transgenic P. trichocarpa samples had decreased storage and loss moduli compared with the wildtype. The solid-state NMR revealed increased lignin molecular mobility in the reduced-lignin transgenic lines. Also, noticeably reduced glass transition temperatures (Tg) were observed in the transgenic lines with reduced lignin contents and altered lignin monomer compositions compared with the wildtype. The increased lignin molecular mobility and reduced Tg in these samples can probably contribute to wood utilization and processing, such as lignin removal for pulp and paper and biofuels production, as well as particle consolidation during wood composite manufacturing.}, number={2}, journal={BIORESOURCES}, author={Edmunds, Charles W. and Peszlen, Ilona and Chiang, Vincent L. and Kelley, Stephen S. and Miller, Zachary D. and Davis, Mark F. and Gjersing, Erica and Peralta, Perry}, year={2019}, month={May}, pages={4760–4773} } @article{miller_peralta_mitchell_chiang_edmunds_peszlen_2018, title={Altered Lignin Content and Composition in Transgenic Populus trichocarpa Results in a Decrease of Modulus of Elasticity}, volume={13}, ISSN={["1930-2126"]}, DOI={10.15376/biores.13.4.7698-7708}, abstractNote={Transgenic Populus trichocarpa wood was compared to the corresponding wild-type material. The static modulus of elasticity in three-point bending was measured and the chemical composition among the specimens were compared, including the glucose, xylose, and lignin contents as well as the S/G ratio. Changes in chemical composition, created by genetic manipulations of the lignin biosynthetic pathway, affect the mechanical properties of young small-diameter transgenic trees. There are indications that a decrease in lignin content causes severe reductions in mechanical properties. Changes in lignin structure, either from an increased S/G ratio or structural lignin modifications, also negatively influence the mechanical properties.}, number={4}, journal={BIORESOURCES}, author={Miller, Zachary D. and Peralta, Perry N. and Mitchell, Phil and Chiang, Vincent L. and Edmunds, Charles W. and Peszlen, Ilona M.}, year={2018}, pages={7698–7708} } @inproceedings{wang_peralta_mitchell_peszlen_2018, title={Fire Performance of Southern Yellow Pine Cross-Laminated Timber}, booktitle={Society of Wood Science and Technology 2018 International Convention}, author={Wang, G. and Peralta, P. and Mitchell, P. and Peszlen, I.}, year={2018} } @article{wang_matthews_williams_shi_yang_tunlayaanukit_chen_li_liu_lin_et al._2018, title={Improving wood properties for wood utilization through multi-omics integration in lignin biosynthesis}, volume={9}, ISSN={2041-1723}, url={http://dx.doi.org/10.1038/s41467-018-03863-z}, DOI={10.1038/s41467-018-03863-z}, abstractNote={AbstractA multi-omics quantitative integrative analysis of lignin biosynthesis can advance the strategic engineering of wood for timber, pulp, and biofuels. Lignin is polymerized from three monomers (monolignols) produced by a grid-like pathway. The pathway in wood formation of Populus trichocarpa has at least 21 genes, encoding enzymes that mediate 37 reactions on 24 metabolites, leading to lignin and affecting wood properties. We perturb these 21 pathway genes and integrate transcriptomic, proteomic, fluxomic and phenomic data from 221 lines selected from ~2000 transgenics (6-month-old). The integrative analysis estimates how changing expression of pathway gene or gene combination affects protein abundance, metabolic-flux, metabolite concentrations, and 25 wood traits, including lignin, tree-growth, density, strength, and saccharification. The analysis then predicts improvements in any of these 25 traits individually or in combinations, through engineering expression of specific monolignol genes. The analysis may lead to greater understanding of other pathways for improved growth and adaptation.}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Wang, Jack P. and Matthews, Megan and Williams, Cranos M. and Shi, Rui and Yang, Chenmin and TunlayaAnukit, Sermsawat and Chen, Hsi-Chuan and Li, Quanzi and Liu, Jie and Lin, Chien-Yuan and et al.}, year={2018}, pages={1579} } @inproceedings{wang_peralta_mitchell_peszlen_2018, title={Moisture Transport in Southern Yellow Pine Cross-Laminated Timber}, booktitle={Society of Wood Science and Technology 2018 International Convention}, author={Wang, G. and Peralta, P. and Mitchell, P. and Peszlen, I.}, year={2018} } @inproceedings{peszlen_miller_edmunds_peralta_2018, title={Morphological and Mechanical Properties of Transgenic Poplars and Pines with Modified Cell Wall Components}, booktitle={Society of Wood Science and Technology 2018 International Convention}, author={Peszlen, I. and Miller, Z.D. and Edmunds, C.W. and Peralta, P.}, year={2018} } @article{edmunds_peralta_kelley_chiang_sharma-shivappa_davis_harman-ware_sykes_gjersing_cunningham_et al._2017, title={Characterization and enzymatic hydrolysis of wood from transgenic Pinus taeda engineered with syringyl lignin or reduced lignin content}, volume={24}, ISSN={["1572-882X"]}, DOI={10.1007/s10570-017-1231-z}, abstractNote={Softwood is an abundant resource; however, currently its utilization for bioconversion to obtain platform sugars is limited. Pinus taeda trees which were genetically modified to either produce S lignin or to decrease lignin content were characterized with a suite of analytic techniques. Syringyl lignin was visualized in the secondary xylem of one genetic line with Mäule staining. Solid-state nuclear magnetic resonance identified the S lignin units were coupled into the lignin through β-O-4 linkages, and thioacidolysis measured approximately 13% S lignin content in the same sample. Reductions of the lignin of as much as 33% were observed in the transgenics. To better understand how these modifications affect bioconversion, their amenability to hot water and dilute acid pretreatments and enzymatic hydrolysis was evaluated. Lignin reductions resulted in 1.9–3.2-fold increases in glucose release compared to the control. However, no apparent benefit was observed by S lignin incorporation at the concentrations reported in this study. These results highlight the potential for softwood cell wall properties to be improved for bioenergy/biochemical applications.}, number={4}, journal={CELLULOSE}, author={Edmunds, Charles W. and Peralta, Perry and Kelley, Stephen S. and Chiang, Vincent L. and Sharma-Shivappa, Ratna R. and Davis, Mark F. and Harman-Ware, Anne E. and Sykes, Robert W. and Gjersing, Erica and Cunningham, Michael W. and et al.}, year={2017}, month={Apr}, pages={1901–1914} } @inproceedings{wang_peralta_mitchell_peszlen_2017, title={Fire Performance of Edge-Glued Cross-Laminated Timber}, booktitle={NC State University Graduate Student Research Symposium}, author={Wang, G. and Peralta, P. and Mitchell, P. and Peszlen, I.}, year={2017} } @article{lin_li_tunlaya-anukit_shi_sun_wang_liu_loziuk_edmunds_miller_et al._2016, title={A cell wall-bound anionic peroxidase, PtrPO21, is involved in lignin polymerization in Populus trichocarpa}, volume={12}, ISSN={1614-2942 1614-2950}, url={http://dx.doi.org/10.1007/S11295-016-0978-Y}, DOI={10.1007/S11295-016-0978-Y}, number={2}, journal={Tree Genetics & Genomes}, publisher={Springer Science and Business Media LLC}, author={Lin, Chien-Yuan and Li, Quanzi and Tunlaya-Anukit, Sermsawat and Shi, Rui and Sun, Ying-Hsuan and Wang, Jack P. and Liu, Jie and Loziuk, Philip and Edmunds, Charles W. and Miller, Zachary D. and et al.}, year={2016}, month={Mar} } @inproceedings{edmunds_peralta_peszlen_sharma-shivappa_chiang_kelley_davis_2016, title={Characterization and enzymatic hydrolysis of genetically modified Pinus taeda with decreased lignin content and incorporated syringyl lignin}, booktitle={Society of Wood Science and Technology 2016 International Convention}, author={Edmunds, Charles W. and Peralta, Perry and Peszlen, Ilona and Sharma-Shivappa, Ratna and Chiang, Vincent and Kelley, Steven and Davis, Mark}, year={2016} } @article{edmunds_peralta_peszlen_sharma-shivappa_giles_kelley_chiang_2016, title={Fungal degradation method development for small wood samples subjected to Ceriporiopsis subvermispora}, volume={48}, url={https://wfs.swst.org/index.php/wfs/article/view/2343/2272}, number={SI}, journal={Wood and Fiber Science}, author={Edmunds, C.W. and Peralta, P. and Peszlen, I. and Sharma-Shivappa, R. and Giles, R. and Kelley, S. and Chiang, V.}, year={2016} } @inproceedings{peszlen_edmunds_peralta_giles_chiang_2016, title={Fungal pretreatment, white-rot fungi, brown-rot fungi, Populus trichocarpa, genetic modification}, booktitle={Society of Wood Science and Technology 2016 International Convention}, author={Peszlen, Ilona and Edmunds, Charles Warren and Peralta, Perry and Giles, Richard and Chiang, Vincent}, year={2016} } @inproceedings{miller_peszlen_peralta_2015, title={Anatomical, Physical and Mechanical Properties of Transgenic Loblolly Pine}, booktitle={Society of Wood Science and Technology 2015 International Convention}, publisher={Society of Wood Science and Technology}, author={Miller, Z.D. and Peszlen, I. and Peralta, P.}, year={2015} } @inproceedings{edmunds_chiang_sharma-shivappa_giles_peralta_peszlen_2015, title={Fungal pretreatment method optimization for small wood samples degraded by Ceriporiopsis subvermispora}, booktitle={Society of Wood Science and Technology 2015 International Convention}, author={Edmunds, E.C. and Chiang, V. and Sharma-Shivappa, R. and Giles, R. and Peralta, P. and Peszlen, I.}, year={2015} } @inproceedings{edmunds_chiang_sharma-shivappa_giles_peralta_peszlen_2015, title={Fungal pretreatment of genetically modified Black Cottonwood - Merging novel low-input fungal pretreatment with next-generation lignocellulosic feedstocks}, booktitle={Society of Wood Science and Technology 2015 International Convention}, author={Edmunds, E.C. and Chiang, V. and Sharma-Shivappa, R. and Giles, R. and Peralta, P. and Peszlen, I.}, year={2015} } @inproceedings{miller_chiang_peszlen_peralta_2015, title={Influence of Lignin Modification on Microfibril Angle in Young Transgenic Black Cottonwood Trees}, booktitle={Society of Wood Science and Technology 2015 International Convention}, author={Miller, Z.D. and Chiang, V. and Peszlen, I. and Peralta, P.}, year={2015} } @inproceedings{dick_peralta_peszlen_2014, title={Changes in the Anatomy of Exposed Roots of Some Hardwood Species}, booktitle={Society of Wood Science and Technology 2014 International Convention}, author={Dick, B. and Peralta, P. and Peszlen, I.}, year={2014} } @inproceedings{miller_peszlen_peralta_2014, title={Chemical and Mechanical Properties of Young Black Cottonwood}, booktitle={34th Symposium of the Philippine-American Academy of Science and Engineering (PAASE}, author={Miller, Z. and Peszlen, I. and Peralta, P.}, year={2014} } @inproceedings{miller_peszlen_peralta_2014, title={Comparing Mechanical and Chemical Properties of Young Transgenic Black Cottonwood Trees Modified for Reduction of Specific Genes in Lignin Biosynthesis}, booktitle={Society of Wood Science and Technology 2014 International Convention}, author={Miller, Z. and Peszlen, I. and Peralta, P.}, year={2014} } @inproceedings{edmunds_peralta_peszlen_2014, title={Thermo-mechanical properties of genetically modified Populus trichocarpa with altered lignin content and structure}, booktitle={34th Symposium of the Philippine-American Academy of Science and Engineering (PAASE}, author={Edmunds, C.W. and Peralta, P. and Peszlen, I.}, year={2014} } @inproceedings{edmunds_peralta_peszlen_2014, title={Understanding the relationship between thermo-mechanical behavior and lignin properties in genetically modified Populus trichocarpa}, booktitle={Society of Wood Science and Technology 2014 International Convention}, author={Edmunds, C.W. and Peralta, P. and Peszlen, I.}, year={2014}, pages={47} } @article{dick_hey_peralta_jewell_simon_peszlen_2014, title={ESTIMATING ANNUAL RIVERBANK EROSION RATES-A DENDROGEOMORPHIC METHOD}, volume={30}, ISSN={["1535-1467"]}, DOI={10.1002/rra.2682}, abstractNote={ABSTRACTAn accurate estimation of riverbank erosion rates is critical for the evaluation of the past, present, and future sediment regime of river systems. Understanding these relationships allows watershed managers and regulators to prioritize river restoration and contaminated site remediation projects. In this dendrogeomorphic study, changes in the anatomy of tree roots exposed between 1 and 31 years were used to estimate the average annual erosion rates of riverbank sediments on a large river in Michigan, USA. Exposed root samples from diffuse and ring‐porous hardwoods, together with buried ones as controls, were analyzed. Differences in the arrangement, size and frequency of vessels, fiber diameter, cell wall thickness, growth ring width, and scarring between the exposed and the buried samples were used to identify the first year of root exposure. Results of the regression analysis between the average annual erosion rate and the Bank Erosion Hazard Index (BEHI) indicated that the more recently exposed roots (less than 7 years in this study) explained more of the variance (R2 = 0.67) than when all samples were included (R2 = 0.38). Although the average erosion rates for long periods can be accurately determined from the dating of exposed tree roots, attempts to relate these rates using the BEHI for longer periods are less successful, as BEHI values can vary considerably over time as the riverbank erodes. Consequently, when using exposed tree roots to develop regression equations and erosion rate curves for the estimation of erosion rates based on BEHI scores, it is necessary to use roots that were recently exposed. Copyright © 2013 John Wiley & Sons, Ltd.}, number={7}, journal={RIVER RESEARCH AND APPLICATIONS}, author={Dick, B. M. and Hey, R. and Peralta, P. and Jewell, I. and Simon, P. and Peszlen, I.}, year={2014}, month={Sep}, pages={845–856} } @article{domec_rivera_king_peszlen_hain_smith_frampton_2013, title={Hemlock woolly adelgid (Adelges tsugae) infestation affects water and carbon relations of eastern hemlock (Tsuga canadensis) and Carolina hemlock (Tsuga caroliniana)}, volume={199}, ISSN={0028-646X 1469-8137}, url={http://dx.doi.org/10.1111/nph.12263}, DOI={10.1111/nph.12263}, abstractNote={Summary Hemlock woolly adelgid (HWA) is an exotic insect pest causing severe decimation of native hemlock trees. Extensive research has been conducted on the ecological impacts of HWA, but the exact physiological mechanisms that cause mortality are not known. Water relations, anatomy and gas exchange measurements were assessed on healthy and infested eastern (Tsuga canadensis) and Carolina (Tsuga caroliniana) hemlock trees. These data were then used in a mechanistic model to test whether the physiological responses to HWA infestation were sufficiently significant to induce changes in whole‐plant water use and carbon uptake. The results indicated coordinated responses of functional traits governing water relations in infested relative to healthy trees. In response to HWA, leaf water potential, carbon isotope ratios, plant hydraulic properties and stomatal conductance were affected, inducing a reduction in tree water use by > 40% and gross primary productivity by 25%. Anatomical changes also appeared, including the activation of traumatic cells. HWA infestation had a direct effect on plant water relations. Despite some leaf compensatory mechanisms, such as an increase in leaf hydraulic conductance and nitrogen content, tree water use and carbon assimilation were diminished significantly in infested trees, which could contribute to tree mortality. }, number={2}, journal={New Phytologist}, publisher={Wiley}, author={Domec, Jean‐Christophe and Rivera, Laura N. and King, John S. and Peszlen, Ilona and Hain, Fred and Smith, Benjamin and Frampton, John}, year={2013}, month={Apr}, pages={452–463} } @inproceedings{miller_peszlen_peralta_2013, title={Mechanical properties of young transgenic black cottonwood trees modified for reduction of specific genes in lignin biosynthesis}, booktitle={8th Annual NC State University Graduate Student Research Symposium}, author={Miller, Z. and Peszlen, I. and Peralta, P.}, year={2013}, pages={53} } @article{dyk_peralta_peszlen_2013, title={Modeling of the mechanical properties of a wood-fiber/bicomponent-fiber composite}, volume={8}, DOI={10.15376/biores.8.3.3672-3684}, abstractNote={An engineered composite that combines a wood fiber core, a bicomponent fiber face, and a bicomponent fiber back was evaluated for its elastic response using laminate theory. Using the properties of the individual laminae as input variables, the laminate’s elastic modulus, axial strain, and lateral strain were determined by means of the model, and compared with values determined experimentally. The model yielded an axial elastic modulus of 950 MPa, which did not differ substantially from the measured value of 920 MPa. Statistical analyses showed that the measured and calculated strains were not significantly different in either the axial or lateral directions. The model underpredicted the strains along the fiber direction of the bicomponent fiber sheets by approximately 4%. A greater difference (12%) between predicted and measured values was observed in the lateral direction.}, number={3}, journal={BioResources}, author={Dyk, H. and Peralta, P. and PESZLEN, ILONA}, year={2013}, pages={3672–3684} } @inproceedings{miller_peralta_peszlen_2013, title={Modulus of elasticity of young transgenic black cottonwood modified for specific genes involved in lignin biosynthesis}, booktitle={Forest Products Society 67th & Society of Wood Science and Technology 56th International Convention}, author={Miller, Z. and Peralta, P. and Peszlen, I.}, year={2013} } @article{lu_li_wei_chang_tunlaya-anukit_kim_liu_song_sun_yuan_et al._2013, title={Ptr-miR397a is a negative regulator of laccase genes affecting lignin content in Populus trichocarpa}, volume={110}, ISSN={0027-8424 1091-6490}, url={http://dx.doi.org/10.1073/PNAS.1308936110}, DOI={10.1073/PNAS.1308936110}, abstractNote={ Laccases, as early as 1959, were proposed to catalyze the oxidative polymerization of monolignols. Genetic evidence in support of this hypothesis has been elusive due to functional redundancy of laccase genes. An Arabidopsis double mutant demonstrated the involvement of laccases in lignin biosynthesis. We previously identified a subset of laccase genes to be targets of a microRNA (miRNA) ptr-miR397a in Populus trichocarpa . To elucidate the roles of ptr-miR397a and its targets, we characterized the laccase gene family and identified 49 laccase gene models, of which 29 were predicted to be targets of ptr-miR397a. We overexpressed Ptr-MIR397a in transgenic P. trichocarpa . In each of all nine transgenic lines tested, 17 PtrLAC s were down-regulated as analyzed by RNA-seq. Transgenic lines with severe reduction in the expression of these laccase genes resulted in an ∼40% decrease in the total laccase activity. Overexpression of Ptr-MIR397a in these transgenic lines also reduced lignin content, whereas levels of all monolignol biosynthetic gene transcripts remained unchanged. A hierarchical genetic regulatory network (GRN) built by a bottom-up graphic Gaussian model algorithm provides additional support for a role of ptr-miR397a as a negative regulator of laccases for lignin biosynthesis. Full transcriptome–based differential gene expression in the overexpressed transgenics and protein domain analyses implicate previously unidentified transcription factors and their targets in an extended hierarchical GRN including ptr-miR397a and laccases that coregulate lignin biosynthesis in wood formation. Ptr-miR397a, laccases, and other regulatory components of this network may provide additional strategies for genetic manipulation of lignin content. }, number={26}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Lu, S. and Li, Q. and Wei, H. and Chang, M.-J. and Tunlaya-Anukit, S. and Kim, H. and Liu, J. and Song, J. and Sun, Y.-H. and Yuan, L. and et al.}, year={2013}, month={Jun}, pages={10848–10853} } @inproceedings{pongor_peralta_peszlen_domec_2013, title={Wood quality of loblolly pine (Pinus taeda L.) subjected to elevated atmospheric carbon dioxide.}, booktitle={Forest Products Society 67th & Society of Wood Science and Technology 56th International Convention. Forest Products in a Global Sustainable Economy}, author={Pongor, M. and Peralta, P. and Peszlen, I. and Domec, J.-C.}, year={2013} } @inproceedings{xiang_peralta_peszlen_2012, title={Counteracting the effect of shrinkage anisotropy with tensile and compressive set}, booktitle={Forest Products: Solutions for Global Green Economy}, author={Xiang, Z. and Peralta, P. and Peszlen, I.}, year={2012} } @article{horvath_peszlen_gierlinger_peralta_kelley_csoka_2012, title={Distribution of wood polymers within the cell wall of transgenic aspen imaged by Raman microscopy}, volume={66}, ISSN={["1437-434X"]}, DOI={10.1515/hf-2011-0126}, abstractNote={Abstract Little is known about the effect of genetic modification on the chemical composition and structure of wood, which could have a significant effect on reactivity during chemical and enzymatic processing. In this study, information was collected by confocal Raman microscopy (CRM) on the spatial distribution of lignin and polysaccharides in the cell wall of young transgenic aspen with reduced lignin content, increased syringyl/guaiacyl (S/G) ratio, and simultaneously reduced lignin content and increased S/G ratio. CRM revealed that the lignin content of the cell wall and compound middle lamella was reduced by the genetic modification. A higher volume of water was also found in the cell wall of transgenic aspen compared with wild-type aspen, indicating an increase in the hydrophilicity of the cell wall.}, number={6}, journal={HOLZFORSCHUNG}, author={Horvath, Laszlo and Peszlen, Ilona and Gierlinger, Notburga and Peralta, Perry and Kelley, Steve and Csoka, Levente}, year={2012}, month={Aug}, pages={717–725} } @inproceedings{jackson_pongor_peszlen_peralta_domec_2012, title={Elevated Atmospheric CO2: Projecting its Impact on Biomass Accumulation and Wood Quality of Loblolly Pine (Pinus taeda L.)}, booktitle={Forest Product Society, 66th International Convention}, author={Jackson, B.R. and Pongor, M. and Peszlen, I. and Peralta, P. and Domec, J.-C.}, year={2012} } @inproceedings{jackson_pongor_peszlen_peralta_domec_2012, title={Elevated CO2 Treatment Effect on Growth Ring Width and Average Density of Loblolly Pine (Pinus taeda L.)}, booktitle={Natural Resources Programs and Partnerships at Work Association of Natural Resource Extension Professionals 8th Biennial Conference}, author={Jackson, B.R. and Pongor, M. and Peszlen, I. and Peralta, P. and Domec, J.-C.}, year={2012} } @inproceedings{peszlen_peralta_horvath_horvath_xiang_csoka_2012, title={Fiber morphology of aspen and cottonwood affected by the genetic modification of cell wall chemical components}, booktitle={Forest Products: Solutions for Global Green Economy}, author={Peszlen, I. and Peralta, P. and Horvath, B. and Horvath, L. and Xiang, Z. and Csoka, L.}, year={2012} } @inproceedings{pongor_peszlen_peralta_domec_2012, title={Free air carbon dioxide enrichment effect on the wood quality of loblolly pine (Pinus taeda L}, booktitle={7th Annual NC State University Graduate Student Research Symposium}, author={Pongor, M. and Peszlen, I. and Peralta, P. and Domec, J.-C.}, year={2012} } @article{xiang_peralta_peszlen_2012, title={Lumber drying stresses and mitigation of cross-sectional deformation}, volume={44}, number={1}, journal={Wood and Fiber Science}, author={Xiang, Z. Y. and Peralta, P. and Peszlen, I.}, year={2012}, pages={94–102} } @inproceedings{horvath_peszlen_peralta_2012, title={Micromechanical investigation of the interaction between chemical composition and mechanical performance using genetically-modified aspen wood}, booktitle={Forest Products Society 66th International Convention, Forest Products: Solutions for Global Green Economy}, author={Horvath, L. and Peszlen, P. and Peralta, P.}, year={2012} } @article{horvath_peralta_peszlen_csoka_horvath_jakes_2012, title={Modeling hygroelastic properties of genetically modified Aspen}, volume={44}, number={1}, journal={Wood and Fiber Science}, author={Horvath, L. and Peralta, P. and Peszlen, I. and Csoka, L. and Horvath, B. and Jakes, J.}, year={2012}, pages={22–35} } @article{pasztory_peralta_molnar_peszlen_2012, title={Modeling the hygrothermal performance of selected North American and comparable European wood-frame house walls}, volume={49}, ISSN={["0378-7788"]}, DOI={10.1016/j.enbuild.2012.02.003}, abstractNote={In North America, the exterior finish of wood-frame house walls usually consists of a siding, a water resistive barrier, and an oriented strandboard (OSB) sheathing.In Europe, the exterior finish uses the External Thermal Insulation Composite System attached to a gypsum board sheathing.This study was performed to compare the hygrothermal performance of American and European walls by using a finiteelement model.Analysis showed that the European wall has better thermal performance mainly because of the heat-insulating ability of the expanded polysterene (EPS) layer.But when the EPS was reduced to the same thickness as the siding used in American construction, the thermal performance of the European wall did not fare any better than the American structure.The resistance of the European wall to moisture damage was also better than the American walls.One reason for this is the high diffusion resistance of the EPS.But this same high diffusion resistance works to the detriment of an Exterior Insulation Finish System (EIFS) wall if water is able to infiltrate the structure.When water leakage is present, the water content of the OSB in the EIFS wall reaches levels that make it vulnerable to mold growth and fungal decay.}, journal={ENERGY AND BUILDINGS}, author={Pasztory, Zoltan and Peralta, Perry N. and Molnar, Sandor and Peszlen, Ilona}, year={2012}, month={Jun}, pages={142–147} } @article{csoka_hoeger_rojas_peszlen_pawlak_peralta_2012, title={Piezoelectric Effect of Cellulose Nanocrystals Thin Films}, volume={1}, ISSN={2161-1653 2161-1653}, url={http://dx.doi.org/10.1021/mz300234a}, DOI={10.1021/mz300234a}, abstractNote={Ultrathin films of aligned cellulose nanocrystals (CNCs) were assembled on mica supports by using electric field-assisted shear. The relationship between polarization gradients and strain mechanics of the obtained films was examined by monitoring their deflection with an atomic force microscope operated in contact mode. The piezoelectric response of the films was ascribed to the collective contribution of the asymmetric crystalline structure of the cellulose crystals. The magnitude of the effective shear piezoelectric constant (d25) of highly ordered CNC films was determined to be 2.1 Å/V, which is comparable to that of a reference film of a piezoelectric metal oxide.}, number={7}, journal={ACS Macro Letters}, publisher={American Chemical Society (ACS)}, author={Csoka, Levente and Hoeger, Ingrid C. and Rojas, Orlando J. and Peszlen, Ilona and Pawlak, Joel J. and Peralta, Perry N.}, year={2012}, month={Jun}, pages={867–870} } @inproceedings{xiang_peszlen_peralta_2011, title={A novel approach to mitigating defects due to wood shrinkage anisotropy}, booktitle={6th Annual NC State University Graduate Student Research Symposium}, author={Xiang, Z. and Peszlen, I. and Peralta, P.}, year={2011} } @inproceedings{horvath_peralta_peszlen_csoka_2011, title={Computer modeling of the micromechanical properties of transgenic aspen wood}, booktitle={International Scientific Conference on Hardwood Processing}, author={Horvath, L. and Peralta, P. and Peszlen, I. and Csoka, L.}, year={2011} } @article{csoka_hoeger_peralta_peszlen_rojas_2011, title={Dielectrophoresis of cellulose nanocrystals and alignment in ultrathin films by electric field-assisted shear assembly}, volume={363}, ISSN={["1095-7103"]}, DOI={10.1016/j.jcis.2011.07.045}, abstractNote={Ultrathin films of cellulose nanocrystals (CNCs) are obtained by using a convective assembly setup coupled with a low-strength external AC electric field. The orientation and degree of alignment of the rod-like nanoparticles are controlled by the applied field strength and frequency used during film formation. Calculated dipole moments and Clausius–Mossotti factors allowed the determination of the critical frequencies, the peak dielectrophoresis as well as the principal orientation of the CNCs in the ultrathin films. As a result of the combination of shear forces and low electric field highly ultrathin films with controlled, unprecedented CNC alignment are achieved.}, number={1}, journal={JOURNAL OF COLLOID AND INTERFACE SCIENCE}, author={Csoka, Levente and Hoeger, Ingrid C. and Peralta, Perry and Peszlen, Ilona and Rojas, Orlando J.}, year={2011}, month={Nov}, pages={206–212} } @article{li_min_wang_peszlen_horvath_horvath_nishimura_jameel_chang_chiang_2011, title={Down-regulation of glycosyltransferase 8D genes in Populus trichocarpa caused reduced mechanical strength and xylan content in wood}, volume={31}, ISSN={["1758-4469"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-79953831391&partnerID=MN8TOARS}, DOI={10.1093/treephys/tpr008}, abstractNote={Members of glycosyltransferase protein families GT8, GT43 and GT47 are implicated in the biosynthesis of xylan in the secondary cell walls of Arabidopsis. The Arabidopsis mutant irx8 has a 60% reduction in xylan. However, over-expression of an ortholog of Arabidopsis IRX8, poplar PoGT8D, in Arabidopsis irx8 mutant could not restore xylan synthesis. The functions of tree GT8D genes remain unclear. We identified two GT8 gene homologs, PtrGT8D1 and PtrGT8D2, in Populus trichocarpa. They are the only two GT8D members and are abundantly and specifically expressed in the differentiating xylem of P. trichocarpa. PtrGT8D1 transcript abundance was >7 times that of PtrGT8D2. To elucidate the genetic function of GT8D in P. trichocarpa, the expression of PtrGT8D1 and PtrGT8D2 was simultaneously knocked down through RNAi. Four transgenic lines had 85-94% reduction in transcripts of PtrGT8D1 and PtrGT8D2, resulting in 29-36% reduction in stem wood xylan content. Xylan reduction had essentially no effect on cellulose quantity but caused an 11-25% increase in lignin. These transgenics exhibit a brittle wood phenotype, accompanied by increased vessel diameter and thinner fiber cell walls in stem xylem. Stem modulus of elasticity and modulus of rupture were reduced by 17-29% and 16-23%, respectively, and were positively correlated with xylan content but negatively correlated with lignin quantity. These results suggest that PtrGT8Ds play key roles in xylan biosynthesis in wood. Xylan may be a more important factor than lignin affecting the stiffness and fracture strength of wood.}, number={2}, journal={TREE PHYSIOLOGY}, publisher={Oxford University Press (OUP)}, author={Li, Quanzi and Min, Douyong and Wang, Jack Peng-Yu and Peszlen, Ilona and Horvath, Laszlo and Horvath, Balazs and Nishimura, Yufuko and Jameel, Hasan and Chang, Hou-Min and Chiang, Vincent L.}, year={2011}, month={Feb}, pages={226–236} } @article{giles_peszlen_peralta_chang_farrell_grand_horvath_2012, title={Fungal biodegradation of genetically modified and lignin-altered quaking aspen (Populus tremuloides Michx.)}, volume={66}, ISSN={["0018-3830"]}, DOI={10.1515/hf.2011.144}, abstractNote={AbstractBetter access to wood carbohydrates as a result of reduced, or altered, lignin is a goal of biopulping, as well as biofuel research. In the present article, woods from three transgenic trees and one wild-type quaking aspen (Populus tremuloidesMichx.) were analyzed in terms of mass loss of cellulose and lignin after incubation with lignocellulolytic fungi. The transgenic trees had reduced lignin content through transfer of an antisense -4CL gene, elevated syringyl/guaiacyl (S/G) ratio through insertion of a sense CAld5H gene and low lignin content and elevated S/G ratio through simultaneous insertion of -4CL and CAld5H genes, respectively. The lignocellulolytic fungi employed were a lignin-selective white rot fungusCeriporiopsis subvermispora, a simultaneous white rot fungusTrametes versicolorand a brown rot fungusPostia placenta. Reduced lignin degradation was observed in woods with increased S/G ratios indicating that this analytical feature influences decay resistance, regardless of the fungal decay mechanism.}, number={1}, journal={HOLZFORSCHUNG}, author={Giles, Richard and Peszlen, Ilona and Peralta, Perry and Chang, Hou-Min and Farrell, Roberta and Grand, Larry and Horvath, Balazs}, year={2012}, month={Jan}, pages={105–110} } @inproceedings{wegmann_lewis_osburn_peszlen_starek_mitasova_2011, place={Raleigh, NC}, title={Legacy Sediments and Stream Water Quality: Estimating Volume, Nutrient Content, and Stream Bank Erosion in 303(d)-Impaired Waterways of the North Carolina Piedmont}, booktitle={Water Resources Research Institute (WRRI) Annual Conference}, publisher={McKimmon Center}, author={Wegmann, K.W. and Lewis, R.Q. and Osburn, C.L. and Peszlen, I. and Starek, M.J. and Mitasova, H.}, year={2011} } @inproceedings{lewis_wegmann_peszlen_2011, title={Living Erosion Pins: Exposed Root Dendrochronology and Multi-year Rates of Stream Bank Erosion}, booktitle={Water Resources Research Institute (WRRI) Annual Conference}, author={Lewis, R.Q. and Wegmann, K.W. and Peszlen, I.}, year={2011} } @inproceedings{xiang_horvath_peralta_peszlen_2011, title={Minimizing cupping in red oak using the concept of drying stresses}, booktitle={International Scientific Conference on Hardwood Processing}, author={Xiang, Z. and Horvath, L. and Peralta, P. and Peszlen, I.}, year={2011} } @article{horvath_peralta_frazier_peszlen_2011, title={thermal softening of transgenic aspen}, volume={6}, number={2}, journal={BioResources}, author={Horvath, B. and Peralta, P. and Frazier, C. and Peszlen, I.}, year={2011}, pages={2125–2134} } @inproceedings{zhouyang_peszlen_peralta_2010, title={Changes in mass, compression strength, and chemical composition of genetically modified aspen during bio-treatment by lignin-selective white-rot fungus}, booktitle={North Carolina State University, 5th Graduate Student Research Symposium}, author={Zhouyang, Z. and Peszlen, I. and Peralta, P.}, year={2010} } @inproceedings{dick_jewell_peszlen_simon_2010, title={Determining River Bank and Soil erosion rates from exposed tree roots and the potential uses of Dendrochronology in Water Resources Management}, booktitle={Tennessee American Water Resources Association (TN AWRA)}, author={Dick, B. and Jewell, I. and Peszlen, I. and Simon, P.}, year={2010} } @article{horvath_peszlen_peralta_kasal_li_2010, title={EFFECT OF LIGNIN GENETIC MODIFICATION ON WOOD ANATOMY OF ASPEN TREES}, volume={31}, ISSN={["2294-1932"]}, DOI={10.1163/22941932-90000003}, abstractNote={The directed modification of specific traits of trees through genetic engineering provides opportunities for making significant genetic improvements to wood properties in matter of years instead of extended time frames required for traditional natural selection. An attractive target of forest- tree engineering is the modification of lignin content and lignin structure. While lower lignin content improves pulping efficiency, a decrease in lignin content could affect wood characteristics that are critical for solid wood use. After one year of growth in a greenhouse, a total of forty transgenic aspen (Populus tremuloides Michx.) with reduced lignin content and increased syringyl to guaiacyl ratio were harvested and diameter growth and cell morphology were investigated using quantitative wood anatomy and fiber quality analysis techniques. Comparing genetic groups to the wild-type as the control, similar radial growth and quantitative anatomical properties were observed for the genetic group with reduced lignin content. The genetic group with increased S/G ratio had lower diameter growth, lower vessel lumen diameter, but more numerous vessels. The combined effect of changes in lignin content and structure on radial growth and cell morphology seems to be more complex and gave inconsistent results.}, number={1}, journal={IAWA JOURNAL}, author={Horvath, Balazs and Peszlen, Ilona and Peralta, Perry and Kasal, Bohumil and Li, Laigeng}, year={2010}, pages={29–38} } @article{horvath_peszlen_peralta_horvath_kasal_li_2010, title={Elastic modulus determination of transgenic aspen using a dynamic mechanical analyzer in static bending mode}, volume={60}, number={3}, journal={Forest Products Journal}, author={Horvath, B. and Peszlen, I. and Peralta, P. and Horvath, L. and Kasal, B. and Li, L. G.}, year={2010}, pages={296–300} } @article{horvath_peralta_peszlen_divos_kasal_li_2010, title={Elastic modulus of transgenic aspen}, volume={55}, number={1}, journal={Wood Research}, author={Horvath, B. and Peralta, P. and Peszlen, I. and Divos, F. and Kasal, B. and Li, L. G.}, year={2010}, pages={1–10} } @inproceedings{csoka_peralta_peszlen_hoeger_rojas_2010, title={Electric field oriented convective assembly of cellulose nanocrystals}, booktitle={13th International Conference on Organized Molecular Films}, author={Csoka, L. and Peralta, P. and Peszlen, I. and Hoeger, I. and Rojas, O.}, year={2010} } @inproceedings{dick_dick_jewell_simon_peszlen_hey_2010, title={Evaluating Current and Historic River Bank Erosion Using Exposed Tree Roots of Eastern Hardwood Species}, booktitle={2010 Land Grant and Sea Grant - National Water Conference}, author={Dick, B. and Dick, B. and Jewell, I. and Simon, P. and Peszlen, I. and Hey, R.}, year={2010} } @inproceedings{lyons_mitasova_peszlen_wegmann_2010, title={Geospatial Determination of Potential Hillslope Response to an Invasive Species in the Southern Appalachians}, booktitle={41st International Binghamton Geomorphology Symposium (BGS), Geospatial Technologies & Geomorphological Mapping}, author={Lyons, N.J. and Mitasova, H. and Peszlen, I. and Wegmann, K.W.}, year={2010}, pages={15–17,} } @article{horvath_peszlen_peralta_kasal_li_2010, title={Mechanical properties of genetically engineered young aspen with modified lignin content and/or structure}, volume={42}, number={3}, journal={Wood and Fiber Science}, author={Horvath, L. and Peszlen, I. and Peralta, P. and Kasal, B. and Li, L. G.}, year={2010}, pages={310–317} } @inproceedings{horvath_peszlen_peralta_2010, title={Micromechanical modeling of the cell wall of genetically modified aspen (Populus tremuloides) wood}, booktitle={North Carolina State University, 5th Graduate Student Research Symposium}, author={Horvath, L. and Peszlen, I. and Peralta, P.}, year={2010} } @article{pasztory_peralta_peszlen_2011, title={Multi-layer heat insulation system for frame construction buildings}, volume={43}, ISSN={["1872-6178"]}, DOI={10.1016/j.enbuild.2010.11.016}, abstractNote={One of the most important research areas today is in energy-efficient technologies such as heat insulation in buildings. In this research, insulation panels with multilayer, low-emissivity aluminum–polyethylene sheets were prepared and investigated. The results of the study showed that surface emissivity and convection currents have important influence on heat flow. The aluminum–polyethylene sheets were effective in reflecting heat and reducing heat transfer by radiation. They also divided the air space in the insulation system, resulting in the reduction of convection currents and convection heat transfer. The heat insulation system was built without micro heat bridges. Consequently, heat conduction was not increased by micro heat bridges resulting in lower effective thermal conductivity than the commonly used insulation materials. The connection between heat resistance and the number of sheets was not linear. The first inserted sheet had the highest effect and each additional sheet had less influence on heat resistance.}, number={2-3}, journal={ENERGY AND BUILDINGS}, author={Pasztory, Zoltan and Peralta, Perry N. and Peszlen, Ilona}, year={2011}, pages={713–717} } @inproceedings{csoka_varga_horvath_peszlen_2010, title={Pulping of wavelet transform analyzed black locust juvenile and mature wood}, booktitle={Hardwood Science and Technology - The 4th Conference on Hardwood Research and Utilization in Europe}, author={Csoka, L. and Varga, B. and Horvath, M. and Peszlen, I.}, year={2010} } @article{saralde_peralta_peszlen_horvath_2010, title={Technical note: Shrinkage properties of partially cad-deficient loblolly pine lumber}, volume={42}, number={1}, journal={Wood and Fiber Science}, author={Saralde, T. C. and Peralta, P. N. and Peszlen, I. and Horvath, B.}, year={2010}, pages={117–119} } @inproceedings{rivera_domec_frampton_hain_peszlen_king_2010, title={The Effect of Hemlock Woolly Adelgid (HWA) Infestation on Water Relations of Carolina and Eastern Hemlock: Can Ecophysiological Investigation of Tree Water Relations Improve Silvicultural Management of the HWA?}, booktitle={5th Hemlock Woolly Adelgid Symposium}, author={Rivera, Laura N. and Domec, Jean-Christophe and Frampton, John and Hain, Fred and Peszlen, Ilona and King, John S.}, year={2010} } @inproceedings{csoka_peralta_peszlen_hoeger_rojas_2010, title={Ultra Thin Films of Oriented Cellulose Nanocrystals by Electric Field-Assisted Convective Assembly}, booktitle={2010 TAPPI International Conference on Nanotechnology for the Forest Product Industry}, author={Csoka, L. and Peralta, P. and Peszlen, I. and Hoeger, I. and Rojas, O.}, year={2010} } @article{horvath_peszlen_peralta_kelley_2011, title={Use of transmittance near-infrared spectroscopy to predict the mechanical properties of 1-and 2-year-old transgenic aspen}, volume={45}, ISSN={["1432-5225"]}, DOI={10.1007/s00226-010-0330-x}, number={2}, journal={WOOD SCIENCE AND TECHNOLOGY}, author={Horvath, Laszlo and Peszlen, Ilona and Peralta, Perry and Kelley, Steve}, year={2011}, month={May}, pages={303–314} } @article{dyk_peralta_peszlen_banks-lee_2009, title={An innovative wood-fiber composite incorporating nonwoven textile technologies}, volume={59}, DOI={10.13073/0015-7473-59.11.11}, abstractNote={This article is the first to describe a process of manufacturing engineered wood composites that combine two nonwoven textile technologies: bicomponent fiber and needle punching. Hardwood fiber was blended with 10 percent urea formaldehyde and formed into mats. The mats were sandwiched with polypropylene/polyester bicomponent fibers and then needle punched. Needle punching was done by means of barbed needles that oscillated in a vertical direction with regard to the surface of the fiber mat. The barbed needles mechanically interlaced the bicomponent web to the wood-fiber mat and pulled some of the polymer fibers through the thickness direction of the mat. During hot pressing, the polypropylene sheath of the bicomponent fiber flowed, bonded with adjacent wood fibers, and coalesced with the sheath of the adjacent bicomponent fibers. The mats were pressed until the urea formaldehyde was fully cured. Bending and tensile properties of the needle-punched wood composite were assessed and compared with medium-den...}, number={11-12}, journal={Forest Products Journal}, author={Dyk, H. and Peralta, P. and PESZLEN, ILONA and Banks-Lee, P.}, year={2009}, pages={11–17} } @inproceedings{peszlen_horvath_peralta_kasal_li_2009, title={Anatomical Structure of Transgenic Aspen Trees}, booktitle={Experimental and computational methods in wood micromechanics Workshop}, author={Peszlen, I. and Horvath, B. and Peralta, P. and Kasal, B. and Li, L.}, year={2009} } @inproceedings{horvath_peszlen_peralta_kelley_kasal_li_2009, title={Application of Near-Infrared Spectroscopy to Predict Mechanical Properties of Transgenic Aspen}, booktitle={Forest Product Society, 63rd International Convention}, author={Horvath, L. and Peszlen, I. and Peralta, P. and Kelley, S. and Kasal, B. and Li, L.}, year={2009} } @inproceedings{strayhorn_peraltayler_peszlen_2009, title={Bioconversion Using Artificial Soil Matrices}, booktitle={18th Annual North Carolina State University Undergraduate Research Symposium}, author={Strayhorn, T. and Peraltayler, P. and Peszlen, I.}, year={2009} } @inproceedings{dick_jewell_simon_peszlen_hey_2009, title={Dendrogeomorphic Methods of Using Exposed Roots for Relating BEHI and Near Bank Stress to Evaluate Stream Bank Erodibility}, booktitle={3rd National Conference on Ecosystem Restoration}, author={Dick, B. and Jewell, I. and Simon, P. and Peszlen, I. and Hey, R.}, year={2009} } @inproceedings{dick_jewell_peszlen_hey_simon_2009, title={Determining River Bank Erosion rates for the Prediction of Stream Bank Erodibility Using Dendrogeomorphic Methods and Exposed Tree Roots}, booktitle={25th Annual International Conference on Soils, Sediments, Water and Energy}, author={Dick, B. and Jewell, I. and Peszlen, I. and Hey, R. and Simon, P.}, year={2009} } @inproceedings{horvath_peralta_peszlen_kasal_li_2009, title={Effect of Lignin on the Thermo-Mechanical Properties of Transgenic Aspen}, booktitle={Experimental and computational methods in wood micromechanics Workshop}, author={Horvath, B. and Peralta, P. and Peszlen, I. and Kasal, B. and Li, L.}, year={2009} } @inproceedings{horvath_peszlen_peralta_kelley_kasal_li_2009, title={Mechanical Properties of Transgenic Aspen with Reduced Lignin Content and Increased S/G Ratio}, booktitle={Experimental and computational methods in wood micromechanics Workshop}, author={Horvath, L. and Peszlen, I. and Peralta, P. and Kelley, S. and Kasal, B. and Li, L.}, year={2009} } @inproceedings{horvath_peralta_peszlen_2009, title={Prediction of the Mechanical Properties of Young Genetically Modified Aspen Trees using Near-Infrared Spectroscopy}, booktitle={North Carolina State University, 4th Graduate Student Research Symposium}, author={Horvath, L. and Peralta, P. and Peszlen, I.}, year={2009} } @inproceedings{peszlen_horvath_peralta_kasal_li_horvath_2009, title={Property Evaluation of Genetically Engineered Wood from Aspen with Down-regulated Lignin Content}, booktitle={Forest Biotechnology Industry Research Consortium Annual Meeting}, author={Peszlen, I. and Horvath, B. and Peralta, P. and Kasal, B. and Li, L. and Horvath, L.}, year={2009} } @inproceedings{horvath_horvath_peralta_peszlen_kasal_li_2009, title={Thermo-Mechanical Properties of Genetically Engineered Populus Tremuloides Clone}, booktitle={Forest Product Society, 63rd International Convention}, author={Horvath, B. and Horvath, L. and Peralta, P. and Peszlen, I. and Kasal, B. and Li, L.}, year={2009} } @inproceedings{horvath_peszlen_peralta_2009, title={Thermo-mechanical Properties of Transgenic Aspen}, booktitle={Forest Biotechnology Industry Research Consortium Annual Meeting}, author={Horvath, B. and Peszlen, I. and Peralta, P.}, year={2009} } @inproceedings{quanzi_peszlen_chang_2009, title={Transgenic trees with dwarf and brittle-wood phenotypes: Correlation of genetic functions of cellulose synthase genes with tree growth and wood mechanical properties}, booktitle={Forest Biotechnology Industry Research Consortium Annual Meeting}, author={Quanzi, L. and Peszlen, I. and Chang, H.}, year={2009} } @inproceedings{peralta_peszlen_2009, title={Viscoelastic Properties of Genetically Engineered Aspen}, booktitle={Forest Biotechnology Industry Research Consortium Annual Meeting}, author={Peralta, P. and Peszlen, I.}, year={2009} } @inproceedings{peszlen_peralta_horvath_horvath_kasal_li_2008, title={Anatomical and mechanical properties of genetically engineered aspen wood}, booktitle={Genes to Products: Agricultural Plant, Microbe, & Biobased Product Research}, author={Peszlen, I. and Peralta, P. and Horvath, B. and Horvath, L. and Kasal, B. and Li, L.}, year={2008} } @inproceedings{horvath_horvath_peralta_peszlen_2008, title={Comparative study of micromechanical testing and dynamic mechanical analysis of young poplar trees}, booktitle={Forest Product Society, 62nd International Convention}, author={Horvath, B. and Horvath, L. and Peralta, P. and Peszlen, I.}, year={2008} } @inproceedings{giles_peszlen_peralta_2008, title={Decay resistance of genetically modified quaking aspen}, booktitle={Forest Product Society, 62nd International Convention}, author={Giles, R. and Peszlen, P. and Peralta, P.}, year={2008} } @inproceedings{mendoza_horvath_peralta_peszlen_2008, title={Dynamic Mechanical Analysis of Genetically Modified Aspen}, booktitle={17th Annual NC State Undergraduate Research Spring Symposium}, author={Mendoza, E. and Horvath, B. and Peralta, P. and Peszlen, I.}, year={2008} } @inproceedings{peszlen_horvath_peralta_kasal_li_2008, title={Effect of lignin on wood formation in transgenic aspen trees}, booktitle={EuroDendro Conference}, author={Peszlen, I. and Horvath, B. and Peralta, P. and Kasal, B. and Li, L.}, year={2008} } @inproceedings{peszlen_horvath_peralta_kasal_li_2008, title={Fiber characteristics of young aspen trees and their significance as paper fiber resources}, booktitle={Forest Product Society, 62nd International Convention}, author={Peszlen, I. and Horvath, B. and Peralta, P. and Kasal, B. and Li, L.}, year={2008} } @inproceedings{van dyk_peralta_peszlen_2008, title={Mechanical and physical properties of a wood fiber composite reinforced using nonwoven textile technologies}, booktitle={Bonding of Timber Conference}, author={Van Dyk, H. and Peralta, P. and Peszlen, I.}, year={2008} } @article{mechanical properties of lumber from partially cad-deficient loblolly pine (pinus taeda)_2008, volume={40}, number={4}, journal={Wood and Fiber Science}, year={2008}, pages={657–662} } @inproceedings{horvath_horvath_peralta_peszlen_kasal_2008, title={Micromechanical and Dynamic Mechanical Testing of Young Transgenic Trees}, booktitle={3rd Annual NC State Graduate Student Research Symposium}, author={Horvath, B. and Horvath, L. and Peralta, P. and Peszlen, I. and Kasal, B.}, year={2008} } @inproceedings{horvath_peralta_peszlen_2008, title={Nondestructive Assessment of the Mechanical Properties of Transgenic Aspen}, booktitle={North Carolina State University, 4th Graduate Student Research Symposium}, author={Horvath, B. and Peralta, P. and Peszlen, I.}, year={2008} } @inproceedings{horvath_hantos_peszlen_peralta_2008, title={Static Design of a Skating Rink Using Glued-Laminated Timber Construction}, booktitle={Forest Product Society, 62nd International Convention}, author={Horvath, L. and Hantos, Z. and Peszlen, I. and Peralta, P.}, year={2008} } @book{molnar_peszlen_pauko_2008, place={Budapest}, title={Wood Anatomy}, publisher={Szaktudas Kiado Haz Zrt}, author={Molnar, S. and Peszlen, I. and Pauko, A.}, year={2008} } @inproceedings{horvath_kovacs_peralta_peszlen_2007, title={Analysis of traditional wooden window joints with three different methods}, booktitle={Forest Product Society, 61st International Convention}, author={Horvath, B. and Kovacs, Zs and Peralta, P. and Peszlen, I.}, year={2007} } @inproceedings{van dyk_peralta_peszlen_2007, title={Development of Engineered Wood Composites with Nonwoven Textile Technology}, booktitle={Forest Product Society, 61st International Convention}, author={Van Dyk, H. and Peralta, P. and Peszlen, I.}, year={2007} } @inproceedings{peszlen_peralta_li_kasal_2007, title={Fiber morphology of genetically engineered aspen}, booktitle={Forest Product Society, 61st International Convention}, author={Peszlen, I. and Peralta, P. and Li, L. and Kasal, B.}, year={2007} } @inproceedings{saralde_peralta_peszlen_kasal_bangi_horvath_2007, title={Mechanical Properties of lumber from partially CAD-deficient loblolly pine (Pinus taeda)}, booktitle={Forest Product Society, 61st International Convention}, author={Saralde, T. and Peralta, P. and Peszlen, I. and Kasal, B. and Bangi, A. and Horvath, B.}, year={2007} } @article{kasal_peszlen_peralta_li_2007, title={Preliminary tests to evaluate the mechanical properties of young trees with small diameter}, volume={61}, ISSN={["0018-3830"]}, DOI={10.1515/HF.2007.054}, abstractNote={Abstract This paper describes methods developed to test the mechanical properties of small-diameter (3–10 mm) 1-year-old trees. Special test fixtures and procedures were designed to accommodate the small diameter and uneven shape of these young trees. The modulus of elasticity and strength in tension parallel to the grain, compression parallel to the grain, and bending were measured.}, number={4}, journal={HOLZFORSCHUNG}, author={Kasal, Bohumil and Peszlen, Ilona and Peralta, Perry and Li, Laigeng}, year={2007}, pages={390–393} } @inproceedings{peszlen_peralta_kasal_li_horvath_2007, title={Variation in vessel and fiber morphology of genetically engineered aspen}, booktitle={Forest Product Society, 61st International Convention}, author={Peszlen, I. and Peralta, P. and Kasal, B. and Li, L. and Horvath, B.}, year={2007} } @inproceedings{peszlen_2007, title={Variation of Microfibril Angle in Young Eucalyptus Trees - Testing Methodology and Preliminary Data Generation}, booktitle={NCSU Forest Biotechnology Industrial Research Consortium (FORBIRC) Annual Meeting}, author={Peszlen, I.}, year={2007} } @inproceedings{saralde_peralta_peszlen_bangi_2006, title={Mechanical property evaluation of CAD-deficient loblolly pines}, booktitle={Forest Products Society, 60th International Convention}, author={Saralde, T. and Peralta, P. and Peszlen, I. and Bangi, A.}, year={2006} } @inproceedings{saralde_peralta_peszlen_kasal_li_bangi_2006, title={Preliminary results of the property evaluation of genetically engineered aspen}, booktitle={Forest Products Society, 60th International Convention}, author={Saralde, T. and Peralta, P. and Peszlen, I. and Kasal, B. and Li, L. and Bangi, A.}, year={2006} } @inproceedings{peszlen_kasal_peralta_li_2006, title={Screening wood and fiber properties of genetically engineered young trees}, booktitle={Third EPSO Conference: Plant Dynamics: from Molecules to Ecosystems}, author={Peszlen, I. and Kasal, B. and Peralta, P. and Li, L.}, year={2006} } @inproceedings{kasal_peszlen_peralta_li_2006, title={Test methods to determine properties of small-diamter genetically altered material}, booktitle={7th World Congress on Computational Mechanics - Mechanical and Physical Properties of Wood and Wood Based Materials}, author={Kasal, B. and Peszlen, I. and Peralta, P. and Li, L.}, year={2006} } @inproceedings{peralta_peszlen_li_kasal_2006, title={Transgenic as surrogate materials for understanding wood biophysics}, booktitle={NCSU Forest Biotechnology Industrial Research Consortium (FORBIRC) Annual Meeting}, author={Peralta, P. and Peszlen, I. and Li, L. and Kasal, B.}, year={2006} } @inproceedings{peszlen_2006, title={Variation in anatomical properties of genetically engineered wood from aspen with down-regulated lignin}, booktitle={NCSU Forest Biotechnology Industrial Research Consortium (FORBIRC) Annual Meeting}, author={Peszlen, I.}, year={2006} } @inproceedings{peszlen_2006, title={Variation of Microfibril Angle in Young Eucalyptus Trees - Testing Methodology and Preliminary Data Generation}, booktitle={NCSU Forest Biotechnology Industrial Research Consortium (FORBIRC) Annual Meeting}, author={Peszlen, I.}, year={2006} } @inproceedings{peszlen_2005, title={Anatomical Properties of Genetically Engineered Wood from Aspen with Down-regulated Lignin}, booktitle={NCSU Forest Biotechnology Industrial Research Consortium (FORBIRC) Annual Meeting}, author={Peszlen, I.}, year={2005} } @article{yeh_goldfarb_chang_peszlen_braun_kadla_2005, title={Comparison of morphological and chemical properties between juvenile wood and compression wood of loblolly pine}, volume={59}, ISSN={["1437-434X"]}, DOI={10.1515/hf.2005.107}, abstractNote={Abstract In conifers, juvenile wood (JW) is always associated with compression wood (CW). Due to their similar properties, there is a common belief that JW is the same as CW. To resolve whether JW is identical to CW, 24 rooted cuttings of one loblolly pine clone were planted in growth chambers under normal, artificial bending, and windy environments. The results show that the morphology of JW is significantly different from CW. Furthermore, chemical analyses revealed that JW and CW are significantly different in chemical composition. Our results indicate that JW is different from CW, and the wood formed under a controlled windy environment is a mild type of compression wood.}, number={6}, journal={HOLZFORSCHUNG}, author={Yeh, TF and Goldfarb, B and Chang, HM and Peszlen, I and Braun, JL and Kadla, JF}, year={2005}, pages={669–674} } @inproceedings{xiaoqiang_kasal_peralta_peszlen_2005, title={Methodology Development for Testing the Properties of Wood From Genetically Engineered Aspen}, booktitle={Forest Products Society, 59th International Convention}, author={Xiaoqiang, X. and Kasal, B. and Peralta, P. and Peszlen, I.}, year={2005} } @inproceedings{yeh_goldfarb_chang_peszlen_kadla_2005, title={New Insights into the Similarities between Juvenile Wood and Compression Wood in Loblolly Pine}, booktitle={59th Appita Annual Conference and Exhibition: Incorporating the 13th ISWFPC (International Symposium on Wood, Fibre and Pulping Chemistry)}, author={Yeh, Ting-Feng and Goldfarb, Barry and Chang, Hou-Min and Peszlen, Ilona and Kadla, John F.}, year={2005} } @inproceedings{kasal_peszlen_peralta_2005, title={Relationship between genetic markers and mechanical properties of genetically improved solid wood – testing methodology and preliminary data generation}, booktitle={NCSU Forest Biotechnology Industrial Research Consortium (FORBIRC) Annual Meeting}, author={Kasal, B. and Peszlen, I. and Peralta, P.}, year={2005} } @inproceedings{peszlen_2004, title={Effects of Environment and Genetics on Wood Quality}, booktitle={NCSU Forest Biotechnology Industrial Research Consortium (FORBIRC) Annual Meeting}, author={Peszlen, I.}, year={2004} } @inproceedings{hall_peszlen_doungpet_2004, title={Finding New Strategies for the Genetic Improvement of Populus Wood Quality}, booktitle={2004 IUFRO Forest Genetic Conference: Forest Genetics and Tree Breeding in the Age of Genomics: Progress and Future}, author={Hall, R.B. and Peszlen, I. and Doungpet, M.}, year={2004} } @inproceedings{hall_peszlen_stokke_2004, title={Genetic and Environmental Interactions in Growth Rates and Wood Quality}, booktitle={Forest Products Society, 58th Annual Meeting}, author={Hall, R.B. and Peszlen, I. and Stokke, D.D.}, year={2004} } @inproceedings{peszlen_molnar_varga_2004, title={Resistance of Juvenile and Mature Wood of Black Locust to Fungal Decay}, booktitle={Forest Products Society, 58th Annual Meeting}, author={Peszlen, I. and Molnar, S. and Varga, F.}, year={2004} } @inproceedings{molnár_peszlen_führer_fehér_2003, title={Wood Quality of Poplars in Hungary}, booktitle={IUFRO All Division 5 Conference}, author={Molnár, S. and Peszlen, I. and Führer, E. and Fehér, S.}, year={2003} } @article{peszlen_paukó_2002, place={Hun}, title={Development and properties of reaction wood - Compression wood II}, volume={12}, journal={Magyar Asztalos és Faipar}, author={Peszlen, I. and Paukó, A.}, year={2002}, pages={152–153} } @article{peszlen_pauko_2002, place={Hun}, title={Development and properties of reaction wood - Tension wood}, volume={2002}, number={1}, journal={Magyar Asztalos és Faipar}, author={Peszlen, I. and Pauko, A.}, year={2002}, pages={140–143} } @inproceedings{molnar_varga_peszlen_feher_2002, title={Investigation of Respirable Range of Hardwood Dust}, booktitle={Technical Forum Presentation, Forest Products Society 56th Annual Meeting}, author={Molnar, S. and Varga, M. and Peszlen, I. and Feher, S.}, year={2002} } @inproceedings{molnar_peszlen_nemeth_feher_varga_2002, title={Modeling the Wood Chain for Red Heart Beech}, booktitle={Technical Forum Presentation, Forest Products Society, 56th Annual Meeting}, author={Molnar, S. and Peszlen, I. and Nemeth, R. and Feher, S. and Varga, M.}, year={2002} } @article{peszlen_paukó_2001, title={Development and properties of reaction wood - Compression wood I}, volume={2001}, number={11}, journal={Magyar Asztalos és Faipar}, author={Peszlen, I. and Paukó, A.}, year={2001}, pages={134–135} } @inproceedings{peszlen_hall_2001, title={Genetic and environmental interaction on Populus specific gravity}, booktitle={Wood Breeding & Biotechnology Conference}, author={Peszlen, I. and Hall, R.B.}, year={2001} } @inproceedings{peszlen_molnar_nemeth_varga_takáts_2001, title={Industrial distribution of wood resources in Hungary}, booktitle={Wood Properties for Industrial Use - 5th Workshop}, author={Peszlen, I. and Molnar, S. and Nemeth, R. and Varga, M. and Takáts, P.}, year={2001} } @inbook{hall_hart_peszlen_2001, series={Progress in Biotechnology}, title={Modifying Populus Environmental Responses: Impacts on Wood Quantity and Quality}, ISSN={0921-0423}, url={http://dx.doi.org/10.1016/s0921-0423(01)80077-0}, DOI={10.1016/s0921-0423(01)80077-0}, abstractNote={ABSTRACT Natural selection for environmental fitness has led to a wide variety of wood properties between and within trees. In the redesign of trees to better serve industry needs, we believe that a focus on modifying genetic control of environmental responses can simultaneously improve total wood yield, tailor wood properties for different uses, and reduce the within tree variation in wood properties. To do that, we need much more understanding of environmental signals, the physiological processes they elicit, and the resulting changes in wood formation. We are studying two types of environmental interactions that we know have large impacts on wood yield, competition effects and responses to pest attack, to determine the corresponding impacts on wood properties. In wild trees, both of theses environmental factors cause a shift in allocation of photosynthate away from stem wood formation to stem height growth and/or replacement of shaded or damaged leaves. Concurrent changes in hormone levels within the tree may impact wood quality traits such as specific gravity and fiber length. We have started evaluating model systems to look at the magnitude of these effects. We discuss results from a spacing trial and an insect impact study in this paper.}, booktitle={Molecular Breeding of Woody Plants}, publisher={Elsevier}, author={Hall, Richard B. and Hart, E.R. and Peszlen, Ilona}, editor={Morohoshi, N. and Komamaine, A.Editors}, year={2001}, pages={229–238}, collection={Progress in Biotechnology} } @inbook{peszlen_2000, place={Sopron}, title={Bark}, booktitle={Faipari Kézikönyv (Wood Handbook}, publisher={Faipari Tudományos Alapítvány}, author={Peszlen, I.}, editor={Molnár, S.Editor}, year={2000}, pages={50–51} } @inbook{peszlen_2000, place={Sopron}, title={Cell wall}, booktitle={Faipari Kézikönyv (Wood Handbook)}, publisher={Faipari Tudományos Alapítvány}, author={Peszlen, I.}, editor={Molnár, S.Editor}, year={2000}, pages={37–40} } @inproceedings{peszlen_rédei_molnár_2000, title={Distribution and Importance of black locust in Hungary}, booktitle={Technology for High Quality Products from Black Locust Conference}, author={Peszlen, I. and Rédei, K. and Molnár, S.}, year={2000} } @inbook{peszlen_2000, place={Sopron}, title={Macroscopic characteristics}, booktitle={Faipari Kézikönyv (Wood Handbook)}, publisher={Faipari Tudományos Alapítvány}, author={Peszlen, I.}, editor={Molnár, S.Editor}, year={2000}, pages={46–50} } @inbook{peszlen_2000, place={Sopron}, title={Microscopic structure}, booktitle={Faipari Kézikönyv (Wood Handbook)}, publisher={Faipari Tudományos Alapítvány}, author={Peszlen, I.}, editor={Molnár, S.Editor}, year={2000}, pages={40–46} } @inproceedings{peszlen_varga_molnár_2000, title={Resistance of untreated and steamed black locust to fungal decay}, booktitle={Technology for High Quality Products from Black Locust Conference}, author={Peszlen, I. and Varga, F. and Molnár, S.}, year={2000} } @inbook{peszlen_2000, place={Sopron}, title={Wood Structure and Properties - The living tree}, booktitle={Faipari Kézikönyv (Wood Handbook)}, publisher={Faipari Tudományos Alapítvány}, author={Peszlen, I.}, editor={Molnár, S.Editor}, year={2000}, pages={29–32} } @inproceedings{marosvölgyi_peszlen_tamás_2000, title={Wood for Energy and its Impact on the Environment}, booktitle={Forest Products Society 54th Annual Meeting}, author={Marosvölgyi, B. and Peszlen, I. and Tamás, R.}, year={2000} } @inproceedings{peszlen_szojakné török_nemeth_paukó_2000, title={Wood properties in Picea abies clones}, booktitle={Forest Products Society 54th Annual Meeting}, author={Peszlen, I. and Szojakné Török, K. and Nemeth, R. and Paukó, A.}, year={2000} } @inproceedings{peszlen_marosvölgyi_tamás_2000, title={Wood quality and utilization perspectives of selected poplar clones for biomass energy in Hungary}, booktitle={21st Session of the International Poplar Commission (IPC 2000)}, author={Peszlen, I. and Marosvölgyi, B. and Tamás, R.}, year={2000} } @inproceedings{peszlen_molnár_2000, title={Wood structure and properties that affect production from black locust}, booktitle={Technology for High Quality Products from Black Locust Conference}, author={Peszlen, I. and Molnár, S.}, year={2000} } @inproceedings{molnar_peszlen_tolvaj_varga_1999, title={Selected Wood Properties of Black locust (Robinia pseudoacacia) affected by steaming}, booktitle={Proceedings of the Forest Product Society 53rd Annual Meeting}, author={Molnar, S. and Peszlen, I. and Tolvaj, L. and Varga, F.}, year={1999}, pages={40} } @misc{peszlen_1999, title={Within-tree and between-tree variation of selected wood propereties in Pinus sylvestris clones}, author={Peszlen, I.}, year={1999} } @inproceedings{peszlen_molnar_tolvaj_varga_1999, title={Wood properties of black locust - a species of the future}, booktitle={Proceedings of the Wood Properties for Industrial Use - 2nd Workshop}, author={Peszlen, I. and Molnar, S. and Tolvaj, L. and Varga, F.}, year={1999}, pages={54} } @article{molnár_peszlen_szojákné török_1999, place={Hun}, title={Wood quality of poplar and pine plantations in Hungary}, volume={99}, number={4}, journal={Magyar Asztalos}, author={Molnár, S. and Peszlen, I. and Szojákné Török, K.}, year={1999}, pages={156–157} } @inproceedings{peszlen_1999, title={Újabb kutatási eredmények az akác minőségi feldolgozásához. [Investigation of quality production from black locust wood]}, booktitle={Hungarian Academy of Science, Agricultural Committee, Forestry Section, III. National Meeting on Forestry, Wildlife and Forest Products Industry}, author={Peszlen, I.}, year={1999} } @inbook{peszlen_matyas_varga_szojákné török_1998, place={Sopron, Hungary}, title={Dry matter allocation and wood quality in relation to spacing in Scots pine clone trial}, booktitle={Environment and Wood Science, Acta Facultatis Ligniensis 1998}, publisher={University of Sopron}, author={Peszlen, I. and Matyas, Cs and Varga, G. and Szojákné Török, K.}, editor={Peszlen, I.Editor}, year={1998}, pages={15–22} } @inproceedings{peszlen_mátyás_varga_szojákné török_1998, place={Zvolen, Slovakia}, title={Effect of spacing on biomass production and wood properties for Pinus sylvestris clones}, booktitle={3rd International Symposium on Wood Structure and properties'98}, author={Peszlen, I. and Mátyás, Cs. and Varga, G> and Szojákné Török, K.}, year={1998} } @inproceedings{peszlen_mátyás_varga_szojákné török_1998, title={Effect of spacing on dry matter poduction in a Scots pine clone trial}, booktitle={Environment and Wood Science Jubilee Conference}, author={Peszlen, I. and Mátyás, Cs. and Varga, G> and Szojákné Török, K.}, year={1998} } @article{varga_peszlen_szojákné török_matyas_1998, place={Hun}, title={Effect of spacing on wood in Scots pine plantations}, volume={XLVI}, number={1}, journal={FAIPAR}, author={Varga, G. and Peszlen, I. and Szojákné Török, K. and Matyas, Cs}, year={1998}, pages={33–35} } @inbook{peszlen_1998, place={Sopron, Hungary}, title={Environment and Wood Science}, booktitle={Acta Facultatis Ligniensis}, publisher={University of Sopron}, author={Peszlen, I.}, year={1998} } @inproceedings{peszlen_1998, title={Faanyagvizsgálati módszerek. [Wood testing methods.]}, booktitle={Hungarian Academy of Science, Veszprém Regional Committee and the Industrial Archeology and Archeometry Working Group Meeting}, author={Peszlen, I.}, year={1998} } @inproceedings{varga_peszlen_szojákné török_mátyás_1998, title={Influence of spacing on wood quality of Pinus sylvestris}, booktitle={Conference on Recent Advances in the Wood Industry}, author={Varga, G. and Peszlen, I. and Szojákné Török, K. and Mátyás, Cs}, year={1998} } @inproceedings{molnár_peszlen_richter_tolvaj_varga_1998, title={Influence of steaming on selected wood properties of black locust (Robinia pseudoacacia L.)}, booktitle={Environment and Wood Science Jubilee Conference}, author={Molnár, S. and Peszlen, I. and Richter, H.G. and Tolvaj, L. and Varga, F.}, year={1998} } @inbook{molnár_peszlen_richter_tolvaj_varga_1998, place={Sopron, Hungary}, title={Influence of steaming on selected wood properties of black locust (Robinia pseudoacacia L.)}, booktitle={Environment and Wood Science, Acta Facultatis Ligniensis 1998}, publisher={University of Sopron}, author={Molnár, S. and Peszlen, I. and Richter, H.G. and Tolvaj, L. and Varga, F.}, editor={Peszlen, I.Editor}, year={1998}, pages={38–45} } @article{peszlen_molnár_varga_1998, place={Hun}, title={Latest results of investigation on black locust wood}, volume={XLVI}, number={2}, journal={FAIPAR}, author={Peszlen, I. and Molnár, S. and Varga, F.}, year={1998}, pages={21–22} } @inproceedings{molnar_peszlen_tolvaj_varga_1998, title={Utilization of black locust in the furniture industry}, booktitle={International Furniture Research Conference}, author={Molnar, S. and Peszlen, I. and Tolvaj, L. and Varga, F.}, year={1998} } @article{peszlen_1998, title={Variation in specific gravity and mechanical properties of poplar clones}, volume={43}, number={2}, journal={Drevársky Vyskum - Wood Research}, author={Peszlen, I.}, year={1998}, pages={1–17} } @book{butterfield_meylan_peszlen_1997, place={Budapest}, edition={English - Hungarian Edition.}, title={A fatest háromdimenziós szerkezete – Three Dimensional Structure of Wood}, publisher={Faipari Tudományos Alapítvány}, author={Butterfield, B. and Meylan, B. and Peszlen, I.}, year={1997} } @article{matyas_peszlen_1997, title={Early testing of Populus clones based on juvenile-mature correlation of their anatomical properties}, volume={46}, number={2-3}, journal={Silvae Genetica}, author={Matyas, C. and Peszlen, I.}, year={1997}, pages={64–72} } @inproceedings{peszlen_1996, title={Juvenile wood quality in connection to reaction wood of hardwoods}, booktitle={ICWSF'96, 2nd International Conference on the Development of Wood Science, Technology and Forestry}, author={Peszlen, I.}, year={1996}, pages={10–12} } @article{peszlen_molnár_1996, place={Hun}, title={Technological parameters of poplars grown in Hungary}, volume={1996}, number={11-12}, journal={Bútor & Faipar II}, author={Peszlen, I. and Molnár, S.}, year={1996}, pages={26–28} } @inproceedings{peszlen_molnár_1996, title={Wood properties of Hungarian poplar clones}, booktitle={IPC’96, Environmental and Social Issues in Poplar and Willow Cultivation and Utilization. 20th Session of FAO International Poplar Commission}, author={Peszlen, I. and Molnár, S.}, year={1996} } @inproceedings{peszlen_1995, title={Juvenile wood characteristics of plantation wood}, booktitle={IUFRO XX. World Congress}, author={Peszlen, I.}, year={1995} } @article{ifju_peszlen_1994, place={Hun}, title={Application of stereology in quantitative anatomy}, volume={XLIV}, number={2}, journal={FAIPAR (Wood Industry)}, author={Ifju, G. and Peszlen, I.}, year={1994}, pages={13–21} } @inbook{peszlen_1994, place={Rotorua, New Zealand}, title={Gelatinous fibers in Populus x euramericana clones}, booktitle={Recent Advances in Wood Anatomy}, publisher={New Zealand Forest Research Institute}, author={Peszlen, I.}, editor={Donaldson, L.A. and Singh, A.P. and Butterfield, B.G. and Whitehouse, L.J.Editors}, year={1994}, pages={327–333} } @article{peszlen_1994, title={Influence of Age on Selected Anatomical Properties of Populus Clones}, volume={15}, ISSN={0928-1541 2294-1932}, url={http://dx.doi.org/10.1163/22941932-90000613}, DOI={10.1163/22941932-90000613}, abstractNote={Anatomieal properties of three Euramerican hybrid poplar [Populus × euramericana (Dode) Guinier] clones, the Italian 'I-214' and the Hungarian 'Kopecky' and 'Koltay', were investigated. Six trees from each clone were sampled from plantations (aged 15 and 10 years) at two sites in Hungary. Disks were removed at breast height from each tree to study the effect of age on variation of anatomical properties. Along the eastern radius, vesscl and fibre parameters were measured for each growth ring using an image analyser.}, number={3}, journal={IAWA Journal}, publisher={Brill}, author={Peszlen, Ilona}, year={1994}, pages={311–321} } @inproceedings{peszlen_1993, title={Effect of site and clone on variation of anatomical properties of Populus x euramericana clones}, booktitle={Wood as a Raw material of the Future Conference, EFE - FATE - Ligno Novum}, author={Peszlen, I.}, year={1993} } @inproceedings{peszlen_1993, title={Wood quality of plantation-grown poplars}, booktitle={Conference on The Globalization of Wood: Supply, Processes, Products, and Markets}, author={Peszlen, I.}, year={1993} } @inproceedings{peszlen_1993, title={Zselatinos rostok elôfordulása - Incidence of gelatinous fibers}, booktitle={Scientific Conference of the University of Forestry and Wood Sciences}, author={Peszlen, I.}, year={1993} } @book{peszlen_1989, place={Sopron}, title={Microscopic and macroscopic structure and identification of indigenous industrial woods of Hungary}, publisher={University of Forestry and Wood Sciences}, author={Peszlen, I.}, year={1989} } @article{molnar_gencsi_babos_peszlen_1986, title={Age-dependent variation in structural and quality parameters of black locust wood}, journal={Scientific Journal of the University of Forestry & Wood Sciences}, author={Molnar, S. and Gencsi, L. and Babos, K. and Peszlen, I.}, year={1986} } @article{peszlen_1985, place={Budapest}, title={Selected attributes of the applicants and students admitted to forestry and forest products related educational programs}, volume={1985}, number={7-8}, journal={Felsőoktatási Szemle (Chronicle of Higher Education)}, author={Peszlen, I.}, year={1985} } @article{hargitai_peszlen_1982, title={Wearing test of the edge stability of frame saw blades hardened by swaging and induction hardening}, journal={Scientific Journal of the University of Forestry & Wood Sciences}, author={Hargitai, L. and Peszlen, I.}, year={1982} }