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Articles 31 - 33 of 33
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A Study Of Volatile Organic Compounds From Transgenic Arabidopsis Thaliana And Solanum Lycopersicum Plants And Analytical Characterization Of Pyrolysis Bio-Oil, Luis A. Caceres
Electronic Thesis and Dissertation Repository
A dynamic headspace method was developed for the non-targeted analysis of volatile organic compounds (VOC) in Arabidopsis and Micro-Tom plants. The method allowed to determine differences from wild type (WT) and transformed plants overexpressing the carotene cleavage dioxygenase 1 (CCD1) genes. In the Arabidopsis study it was revealed the presence of unsaturated hydrocarbons, aromatic derivatives, alcohols, and terpenes. Among extracted volatiles, the apocarotenoid compound β-ionone was also detected, four-fold higher in the transgenic plants than the WT. There were not significant differences in the VOCs between the HS of Micro-Tom tomato plants overexpressing the CCD1 genes and WT. …
The Influence Of Long-Term Gamma-Radiation And Initially Dissolved Chemicals On Aqueous Kinetics And Interfacial Processes, Pamela A. Yakabuskie
The Influence Of Long-Term Gamma-Radiation And Initially Dissolved Chemicals On Aqueous Kinetics And Interfacial Processes, Pamela A. Yakabuskie
Electronic Thesis and Dissertation Repository
This thesis presents work focusing on the long-term effect of gamma-radiation on aqueous solution kinetics. Ionizing radiation drives the decomposition of water to form both oxidizing (•OH, O2, H2O2) and reducing (•eaq−, •O2−, •H, H2) chemical species. Over time, these radiolysis products can react with dissolved solutes and participate in interfacial reactions. This can lead to significant changes in the eventual solution redox condition, and gas phase composition, and in certain cases result in the formation of solid species. Understanding the long-term solution kinetics for radiolysis …
Gamma-Radiation Induced Redox Reactions And Colloidal Formation Of Chromium And Cobalt Oxide Nanoparticles, Leena M. Alrehaily
Gamma-Radiation Induced Redox Reactions And Colloidal Formation Of Chromium And Cobalt Oxide Nanoparticles, Leena M. Alrehaily
Electronic Thesis and Dissertation Repository
The main goal of this thesis research is to develop a mechanistic understanding of radiation-induced chromium oxide and cobalt oxide nanoparticle formation in aqueous solutions containing initially dissolved metal ions. When exposed to ionizing radiation, water decomposes to form a range of chemically reactive radical and molecular products. This redox agents can readily change the oxidation state of dissolved metal ions. The solubility of a transition metal ion can vary by several orders of magnitude depending on its oxidation state and the solution pH. Thus, reactions that can alter the oxidation state of a dissolved ion can lead to the …