@article{faith_kim_azizoglu_kathariou_czuprynski_2012, title={Purine Biosynthesis Mutants (purA and purB) of Serotype 4b Listeria monocytogenes Are Severely Attenuated for Systemic Infection in Intragastrically Inoculated A/J Mice}, volume={9}, ISSN={["1556-7125"]}, DOI={10.1089/fpd.2011.1013}, abstractNote={In this study, we demonstrate that purA and purB transposon mutants of serotype 4b Listeria monocytogenes were severely impaired in their ability to colonize the gastrointestinal tract and cause systemic infection of the spleen, liver, and gallbladder following intragastric inoculation of A/J mice. The mutant strains were also impaired in their ability to multiply within Caco-2 human intestinal epithelial cells. Neither mutant was affected in resistance to synthetic gastric fluid (pH 4.5). These findings indicate that purine biosynthesis is critical for gastrointestinal virulence of L. monocytogenes serotype 4b in mice.}, number={5}, journal={FOODBORNE PATHOGENS AND DISEASE}, author={Faith, Nancy G. and Kim, Jae-Won and Azizoglu, Reha and Kathariou, Sophia and Czuprynski, Charles}, year={2012}, month={May}, pages={480–486} } @article{cheng_kim_lee_siletzky_kathariou_2010, title={DNA Probes for Unambiguous Identification of Listeria monocytogenes Epidemic Clone II Strains}, volume={76}, ISSN={["1098-5336"]}, DOI={10.1128/aem.03064-09}, abstractNote={ABSTRACT}, number={9}, journal={APPLIED AND ENVIRONMENTAL MICROBIOLOGY}, author={Cheng, Ying and Kim, J. -W. and Lee, S. and Siletzky, R. M. and Kathariou, S.}, year={2010}, month={May}, pages={3061–3068} } @article{gundogdu_lucovsky_chung_kim_nordlund_2009, title={Application of non-linear optical second harmonic generation and X-ray absorption and spectroscopies to defect related properties of Hf silicate and Hf Si oxynitride gate dielectrics}, volume={86}, ISSN={["1873-5568"]}, DOI={10.1016/j.mee.2009.03.004}, abstractNote={Three different Hf oxide based dielectrics have emerged as viable candidates for applications in advanced ULSI devices. This article focuses on two of these: (i) phase separated Hf silicates with (i) 70-85% nano-crystalline HfO2 with a nano-grain size <2nm, and 15-30% ~2nm non-crystalline SiO2 inclusions, and (ii) Hf Si oxynitride alloys, the most promising of which has a composition, (HfO2)0.3(SiO2)0.3(Si3N4)0.4 designated as 3/3/4 Hf SiON. X-ray absorption spectroscopy has been applied to identification of defect associated with vacancy structures in phase separated silicates, and network disruption defects in the Hf Si oxynitrides. Optical second harmonic generation is introduced in this article for the first time as a non-invasive approach for detecting macroscopic strain, that is shown to be absent in these low defect density dielectrics, the phase separated Hf silicates, and Hf Si oxynitrides, but present in HfO2 films, and Hf silicates with lower HfO2 content, e.g., the 40% HfO2 film of this article.}, number={7-9}, journal={MICROELECTRONIC ENGINEERING}, author={Gundogdu, K. and Lucovsky, G. and Chung, K-B. and Kim, J. -W. and Nordlund, D.}, year={2009}, pages={1654–1657} } @article{lucovsky_chung_kim_norlund_2009, title={Spectroscopic differentiation between O-atom vacancy and divacancy defects, respectively, in TiO2 and HfO2 by X-ray absorption spectroscopy}, volume={86}, ISSN={["0167-9317"]}, DOI={10.1016/j.mee.2009.03.005}, abstractNote={Defect state features have been detected in second derivative O K edge spectra for thin films of nano-crystalline TiO2 and HfO2. Based on soft X-ray photoelectron band edge spectra, and the occurrence of occupied band edge 4f states in Gd(Sc,Ti)O3, complementary spectroscopic features have been confirmed in the pre-edge (<530 eV) and vacuum continuum (>545 eV) regimes of O K edge spectra. Qualitatively similar spectral features have been obtained for thin films of HfO2 and TiO2, and these have been assigned to defect states associated with vacancies. The two electrons/removed O-atom are not distributed uniformly over the TM atoms defining the vacancy geometry, but instead are localized in equivalent d-states: a d2 state for a Ti monovacancy and a d4 state for a Hf divacancy. This new model for electronic structure provides an unambiguous way to differentiate between monovacancy and divacancy arrangements, as well as immobile (or fixed) and mobile vacancies.}, number={7-9}, journal={MICROELECTRONIC ENGINEERING}, author={Lucovsky, G. and Chung, K-B and Kim, J. -W. and Norlund, D.}, year={2009}, pages={1676–1679} } @article{kim_kathariou_2009, title={Temperature-Dependent Phage Resistance of Listeria monocytogenes Epidemic Clone II}, volume={75}, ISSN={["1098-5336"]}, DOI={10.1128/AEM.02480-08}, abstractNote={ABSTRACT}, number={8}, journal={APPLIED AND ENVIRONMENTAL MICROBIOLOGY}, author={Kim, Jae-Won and Kathariou, Sophia}, year={2009}, month={Apr}, pages={2433–2438} } @article{kim_siletzky_kathariou_2008, title={Host Ranges of Listeria-Specific Bacteriophages from the Turkey Processing Plant Environment in the United States}, volume={74}, ISSN={["1098-5336"]}, DOI={10.1128/AEM.01282-08}, abstractNote={ABSTRACT}, number={21}, journal={APPLIED AND ENVIRONMENTAL MICROBIOLOGY}, author={Kim, Jae-Won and Siletzky, Robin M. and Kathariou, Sophia}, year={2008}, month={Nov}, pages={6623–6630} }