September 9, 2021
Nicole Dennis' Dissertation Research is highlighted in the September Issue of Environmental Toxicology and Chemistry
Collaborative research on the effects of PFAS in Bobwhite quail by graduate student Nicole Dennis was selected as the basis for the September 2021 cover of Environmental Toxicology and Chemistry. Nicole recently completed her Ph.D. and is now a postdoc in Dr. Jay Gan’s lab at UC-Riverside.
September 8, 2021
Haripriya Ramesh Receives Kanti and Hansa Jasani Family Textile Scholarship
Haripriya Ramesh, Ph.D. student working under the supervision of Professor Seshadri Ramkumar is one of the two recipients of Kanti Hansa Jasani Family Textile Scholarship administered by American Association of Textile Chemists and Colorists (AATCC). Haripriya’s research is looking at materials for personnel protection such as masks and wipes. A brief has appeared about this recognition in the flagship magazine AATCC Review, Sep/Oct issue of 2021, pp. 17. Congratulations are in order.
Dr. Armando Elizalde-Velazquez placed 2nd in the Biological and Life Science category of the 2021 Texas Tech University Outstanding Thesis and Dissertation Awards.
Dissertation: Sorption, Uptake, Trophic Transfer and Immunotoxicity of Microplastics and Nanoplastics in the Aquatic Environment.
Major Advisor: Dr. Jaclyn Cañas-Carrell
2 Forensic Lab students presented and Won at the 2021 Virtual Poster Competition hosted by the Graduate School.
They students won first and third place under the category of SCIENCES as follows:
1st place – Samuel Seay
Title of poster: “Flatland Forensics: Analyzing Insect Succession on Decomposing Remains in a High Plains Agricultural Environment”
3rd place- Kirsten Nettles
Title of poster: “Development of Odor Profiling Methods for the Detection of Contraband Firearms”
May 4, 2020
The cover image created by Lihua Lou et al., shows poly(vinyl alcohol) nanofiber prepared by electrospinning method. The inserted drawings represent changes in units (sub sections) within nanofiber webs under external load based on the actual tensile stress‐strain curves of nanofiber webs, as hypothesized by the authors. This study also analyzes the effect of various testing parameters, as well as the interactions on the tensile properties on nanofiber webs. Results from this study, enable a comprehensive understanding of each testing parameter and their interaction effects and help with the standardization of tenacity evaluation of nanofibers.
Tensile testing and fracture mechanism analysis of polyvinyl alcohol nanofibrous webs
Lihua Lou Weijie Yu Ronald J. Kendall Ernest Smith Seshadri S. Ramkumar
First published: 11 March 2020 https://doi.org/10.1002/app.49213
Funding information: Texas Tech University; Office of International Affairs
A tensile properties testing study was conducted to understand the influence of thickness, cross‐head speed (speed of testing), gauge length (GL; specimen test length), and sample shape on important tensile properties of polyvinyl alcohol (PVA) nanofiber webs. The effects of each testing parameter on load at break, extension at break, Young's modulus, and tensile stress–strain curve of PVA nanofiber webs are analyzed. The Welch two sample t‐tests show the significant difference among tested data. Using interaction plots, two‐way analysis of variance, and margin mean plots, the interaction effects among testing parameters have been analyzed. Of all the factors, cross‐head speed, the interaction among GL, and sample thickness (GL: Thickness) and the interaction among GL, testing speed and sample thickness (GL: Speed: Thickness) have significant influence on the tensile properties of PVA nanofiber webs. Moreover, the hypothesized model of mechanism of tensile strain–stress curve of PVA nanofiber webs has been proposed. Based on the model, the tensile strain–stress curve can be split into three stages: linear elastic, partial break up, and complete breakage. This study will provide a better understanding of tensile testing parameters' effects and their interaction effects on the tensile properties of nanowebs.
September 19, 2019
October 28, 2019
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The Department of Environmental Toxicology (ENTX) is the academic home for the core faculty of The Institute of Environmental and Human Health (TIEHH) and the Institute for Forensic Science (IFS) at Texas Tech University. TIEHH and IFS provide faculty and graduate students opportunities for multidisciplinary research and scholarly engagement related to environmental, forensic and human health sciences.