Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 55 for “"chemical agents"”.
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Gas Chromatography: Mass Spectrometry of Chemical Agents and Related Interferents
One of the main problems encountered in chemical analysis operations in the field is collecting sufficient sample from the source and transferring that sample to the measurement instrument for fast separation and identification. I have been involved in developing a field-portable gas …
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An exploration of chemical agents detection using the quantum fingerprint [superscript TM] technology
The detection of chemical agents using a novel, gas-phase, sensor technology has been examined experimentally in this work. The goal of the work was to determine the feasibility of using solid-state materials as gas-phase Quantum Fingerprint TM(QFTM) sensors. The energy levels created by various …
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Evaluating Application Timing Strategies, Suitability, and Efficacy of Apple Blossom Thinning Chemicals for Commercial Use
With post-bloom chemical fruit thinning responses being heavily influenced by tree carbohydrate reserves and weather conditions, there is a need for alternative thinning practices such as chemical blossom thinning in the Mid-Atlantic apple growing region. This project sought to 1) evaluate timing …
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Weathering of wood surfaces: characteristics, mechanisms, and prevention
… light. Spectrophotometric studies on the chemical changes of exposed wood, lignin, and cellulose revealed that photochemical reactions primarily took place in lignin, leading to the generation of carbonyl- and carboxylic-containing degradation products of low molecular weight. Formation of …
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Continuous Electrostatic Beneficiation And Surface Conditioning Of Coal
… operation. In analogy with froth flotation using chemical agents to enlarge the differences in hydrophobicity, the feasibility of enlarging the differences in work function of coal components to improve the separation was also investigated.;A new apparatus for electrostatic separation was designed …
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The use of purified enzymes for the early assessment of toxicity
The increasing level and dispersion of toxic chemicals in the environment has stimulated a need for accurate methods capable of detecting and quantifying the activity of toxicants. The primary objective of this study was to determine, through in vitro tests, the potential of three purified enzymes: …
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The protein of Phleum pratense
… purification, and storage.</p> <p>New chemical agents were studied in connection with the above mentioned protein tor their possible use in the place of phenol as more appropriate bactericidal or bacteriostatic preservatives.</p>
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Breakdown Anodization (BDA) for hierarchical structures of titanium oxide
… for the separation and identification of chemical agents.
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Study of the chemotherapy of leukaemia
… During the first fifty years treatment was by chemical agents. A ,large variety underwent clinical trial and some were found to temporarily influence the leukaemic process. Unfortunately many were highly toxic, and probably on account of this and our ignorance f their mode of action. they …
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Development of a portable miniaturised capillary electrophoresis system for chemical nerve agents detection
… a complete solution to analysis suspected chemical agents accurately and rapidly at a forensic site. In order to reduce the consumed time of sending the sample to the forensic lab, this research aim to provide the real-time data for mobile forensic analysis. The system is ideally portable …
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Development and characterization of an in vitro culture system as a physiological model for chronic Hepatitis B infection
… culture, and the necessity of treatment with chemical agents such as DMSO for reproducible infection.
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Development of and gas permeation study of homo and copolymers from the family of polyphenylene oxides
… properties, and is resistant to a number of chemical agents. The study was divided into two parts: (1) homopolymers and both block and random copolymers of different composition were synthesized by oxidative coupling of 2,6-diphenylphenol and 2,6-dimethylphenol; (2) the physical and gas …
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Tactic behaviors in bacterial dynamics
… (movements or reorientation in response to chemical, physical or environmental stimuli) in flowing, viscous media. Physical descriptions are developed for bacterial chemotaxis (response to chemical agents) near particles exuding attractants, a small-scale process with global-scale …
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Inhibition of Proteus Swarming by the Metabolic Products of Serratia Marcescens
… inhibit swarming. The addition of a number of chemical agents to the median, such as sulfonamides, surface active agents, or narcotic drugs, to mention only a few, will inhibit swarming (32). | Halkias and Fulton (14) observed that pigmented strains of Serratia marcescens grown in mixed culture …
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Synthesis of Sphaeropsidin a Derivatives in a Search for Compounds Active Against Drug-Resistance Cancer
… properties of cancer against chemotherapeutic agents require new chemical agents with promising anticancer activity. One such agent is Sphaeropsidin A (SphA), a fungal metabolite extracted from different sources but mainly from Diplodia cupressi. SphA has shown anticancer activity by overcoming …
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Physiological IRE-1-XBP-1 and PEK-1 signaling in Caenorhabditis elegans larval development and immunity
… of the UPR in response to characterized chemical agents that potently alter ER function or protein stability and folding, leaving physiological or native roles for the UPR relatively uncharacterized. Richardson et al previously demonstrated a role for the UPR in innate immunity in C …
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Antigenic and functional differences between the polar and lateral flagella of Azospirillum brasilense
… important. The effects of various physical and chemical factors on swarming were determined. A temperature of 30°C rather than the optimal growth temperature of 37°C was stimulatory to swarming. Certain chemical agents, p-nitrophenylglycerol, EDTA, sodium deoxycholate, sodium taurocholate, and …
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LDV measurements in a Navy CPS fan
… ventilation fans for Navy ships need to filter chemical agents from the supply air. This requires much greater pressure ratios than in earlier fans. This research was conducted to understand the performance of these new fans. LDV measurements of axial and tangential velocities were made in a …
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