Armindo Ribeiro Gaspar

Works (8)

Updated: July 5th, 2023 15:56

2008 journal article

Propensity of Lignin to Associate: Light Scattering Photometry Study with Native Lignins

BIOMACROMOLECULES, 9(12), 3362–3369.

By: S. Contreras n, A. Gaspar n, A. Guerra n, L. Lucia n  & D. Argyropoulos n 

MeSH headings : Eucalyptus / chemistry; Hydrogen Bonding; Light; Lignin / chemistry; Lignin / isolation & purification; Molecular Weight; Photometry; Picea / chemistry; Scattering, Radiation; Solubility; Solutions; Solvents / chemistry
TL;DR: The challenges and opportunities of measuring the specific refractive index increment (dn/dC) of lignin solutions and determining the kinetics of the dissociation process were investigated and insight is offered into the aggregation and ensuing dissociative events that operate within the lignIn macromolecules. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2007 review

Alternatives for lignocellulosic pulp delignification using polyoxometalates and oxygen: a review

[Review of ]. Green Chemistry, 9(7), 717–730.

By: A. Gaspar, J. Gamelas, D. Evtuguin & C. Neto

Source: NC State University Libraries
Added: August 6, 2018

2007 chapter

Chemicals & energy from forest biomass: A review

Chemicals & energy from forest biomass: A review. In Materials, chemicals and energy from forest biomass (Vol. 954, pp. 2–30).

By: A. Lucian  n, D. Argyropoulos n , L. Adamopoulos n & A. Gaspar n

Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2007 journal article

On the propensity of lignin to associate: A size exclusion chromatography study with lignin derivatives isolated from different plant species

PHYTOCHEMISTRY, 68(20), 2570–2583.

By: A. Guerra n, A. Gaspar n, S. Contreras n, L. Lucia n , C. Crestini * & D. ArgyropouloS n 

author keywords: enzymatic mild acidolysis lignin; milled wood lignin; association; aggregation; lignin; southern pine; Pinus palustris; Norway spruce; Picea abies; douglas fir; Pseudotsuga menziesi; white fir; Abies concolor; Pinaceae; redwood; Sequoia sempervirens; Taxodiaceae; Eucalyptus globulus; myrtaceae; wheat Triticum aestivton; gramineae
MeSH headings : Chromatography, Gel; Lignin / analogs & derivatives; Lignin / isolation & purification; Magnetic Resonance Spectroscopy; Magnoliopsida / chemistry; Molecular Weight; Species Specificity; Tracheophyta / chemistry
TL;DR: Lignin solutions incubated at 4 degrees C showed an associative behaviour manifested by an increase in the weight and number average molecular weights for some species, and lignins from softwoods were found to associate/dissociate to a greater extent than lignin from E. globulus and straw. (via Semantic Scholar)
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UN Sustainable Development Goal Categories
15. Life on Land (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2007 chapter

Oxidative chemistry of lignin In supercritical carbon dioxide & expanded liquids

Oxidative chemistry of lignin In supercritical carbon dioxide & expanded liquids. In Materials, chemicals and energy from forest biomass (Vol. 954, pp. 311–331).

By: D. Argyropoulos n , C. Saquing n, A. Gaspar n, N. Soriano n, L. Lucia n  & O. Rojas n

UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2006 journal article

Chemicals and energy from biomass

CANADIAN JOURNAL OF CHEMISTRY, 84(7), 960–970.

By: L. Lucia n , D. Argyropoulos n , L. Adamopoulos n & A. Gaspar n

author keywords: biomass; biochemicals; natural products; bioenergy
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UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2006 journal article

Quantitative P-31 NMR detection of oxygen-centered and carbon-centered radical species

BIOORGANIC & MEDICINAL CHEMISTRY, 14(12), 4017–4028.

By: D. Argyropoulos n , H. Li n, A. Gaspar n, K. Smith*, L. Lucia n  & O. Rojas n

MeSH headings : Carbon / chemistry; Cyclic N-Oxides / chemical synthesis; Cyclic N-Oxides / chemistry; Free Radicals / chemistry; Hydrogen Peroxide / chemistry; Hydrogen-Ion Concentration; Kinetics; Magnetic Resonance Spectroscopy / methods; Molecular Structure; Organophosphonates / chemical synthesis; Organophosphonates / chemistry; Oxygen / chemistry; Peroxides / chemistry; Phosphorus Isotopes; Superoxides / chemistry
TL;DR: The developed (31)P NMR technique forms the foundations for a targeted understanding of the nature, identity, and mechanisms of radical activity in a variety of biomolecular processes. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2006 journal article

Supercritical CO2 oxidation of lignin: Production of high valued added products

Chimica E L'Industria, 88(1), 74–79.

By: D. Argyropoulos , A. Gaspar, L. Lucia. & R. J.

Source: NC State University Libraries
Added: August 6, 2018

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