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 27 for “"Organophosphorus Compounds"”.
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Thermal degradation of organophosphorus compounds.
… mass spectra of 1,3,5-triazine and phosphorus compounds of relevance to the topic is briefly discussed. The behaviour of heated samples of menazon on paper (one and two dimensional) and thin layer (analytical and preparative) chromatography is described. Details are given of the chromatographic …
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The effects of organophosphorus compounds on the immune system
This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).
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Carbonyl Catalysis: Hydrolysis of Organophosphorus Compounds and Application in Prebiotic Chemistry
… electrophilic activation via carbonyl catalysis. Organophosphorus compounds are crucially important in many aspects in organic chemistry. Many approaches were developed for asymmetric organophosphorus compounds. In this work, different types of organophosphorus compounds were used as the …
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Studies of organophosphorus compounds by nuclear magnetic resonance spectroscopy with two frequency dimensions
A range of organophosphorus compounds with bicyclic and tricyclic cage structures has been prepared and studied by n.m.r. spectroscopy.
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Cross resistance to organophosphorus compounds in malathion- and diazinon- resistant strains of the German cockroach
… data by a topical application method for eight organophosphorus compounds are given for two laboratory-selected .strains of Blattella p:ermanica ( L.), one resistant to malathion and the other resistant to diazinon. Comparison of this data with similar data for a normal susceptible strain of the …
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The determination of β-endosulfan and endosulfan sulfate in human serum with dialkylphosphate metabolites as urinary markers using LC-MS/MS electrospray ionization
… agricultural exposure to organochlorine and organophosphorus pesticides using different biological matrices as reference sources. The method that was validated for the quantification of the organochlorine compounds was used to simultaneously determine β-endosulfan [6, 7, 8, 9, 10, 10- …
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Phosphonate biogeochemical cycling in the marine environment: from an ocean scale to a molecular scale
… cycle was recently confirmed when phosphonates, organophosphorus compounds with P in the (III) oxidation state, were found in high molecular weight dissolved organic matter. Although some features of the P redox cycle have come to light since the discovery of phosphonates, many aspects of …
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Phosphonate biogeochemical cycling in the marine environment: from an ocean scale to a molecular scale
… cycle was recently confirmed when phosphonates, organophosphorus compounds with P in the (III) oxidation state, were found in high molecular weight dissolved organic matter. Although some features of the P redox cycle have come to light since the discovery of phosphonates, many aspects of …
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Organophosphorus-Catalyzed Reductive Functionalization of Nitrocompounds via P(III)/P(V) Redox Couple
Nitro compounds are widely available synthetic building blocks which present a strategical opportunity to serve as direct precursors for the construction of nitrogen-containing molecules with increasing complexity and value. With the utilization of geometric-distorted organophosphetanes as …
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Competitive Enzyme Immunoassay by Polyclonal Antibodies Against Organophosphorus Pesticides
<p>Organophosphorus compounds (OPs) comprise one of the major classes of pesticides in use today because they are highly effective and less toxic. Because of their extensive use, there is a need for monitoring OPs in water and vegetables. Gas chromatography (GC) is the usual method for OPs …
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Design and synthesis of novel sulfur-containing antiviral analogues
… are among the most important sulfur-containing organophosphorus compounds and are central to the work described later in the thesis. The medicinal chemistry of the nucleoside reverse transcriptase inhibitor (NRTI) class of anti-HIV compounds is described in Chapter Two. Our proposed synthetic …
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ΣΧΗΜΑΤΙΣΜΟΣ ΘΕΙΙΚΟΥ ΑΣΒΕΣΤΙΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ
… TO A STEP DISLOCATION MECHANISM. THE PRESENCE OF ORGANOPHOSPHORUS COMPOUNDS HEDP, ENTMP AND NTMP) EVEN AT VERY LOW CONCENTRATIONS (A FEW PPM) DECREASED THE RATES OF CALCIUM SULFATE DIHYDRATE PRECIPITATION IN THE ORDER (ENTMP>NTMP>>HEDP) AT CONDITIONS OF SUSTAINED SUPERSATURATION. MOREOVER, WE HAVE …
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Comparative evolution of mipafox-induced delayed neuropathy in the rat and hen
The group of chemicals designated organophosphorus compounds have had a significant impact on modern life, including use as pesticides, industrial plasticizers and chemical warfare agents. Exposure to certain organophosphates produces a delayed degeneration of the longest and largest nerve fibers, …
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Solvent extraction of first-row transition metals by thiosubstituted organophosphinic acids
Organophosphorus compounds are well known as solvent-extraction reagents. Two new reagents in this class are Cyanex 302 and Cyanex 301, the respective mono- and dithio analogs of the commercial extractant, Cyanex 272 (bis(2,4,4-trimethylpentyl)-phosphinic acid). The replacement of oxygen by sulfur …
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Determination of pesticides and chloroanisoles in water samples using gas chromatography-mass spectrometry.
… chlorpyrifos and chlorpyrifos-methyl (both organophosphorus compounds) and simazine (a triazine herbicide). These methods were then applied to the determination of pesticides spiked into surface and drinking water samples and the recoveries measured.The same procedure was applied to the …
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Involvement of calcium in organophosphorus-induced delayed neuropathy: a functional morphological, and biochemical study
Organophosphorus compounds are widely used in agriculture as pesticides and in industry as petroleum additives and modifiers of plastics. Some of these compounds are capable of inducing an irreversible neuropathy developing weeks to months after exposure, yet there is no effective treatment. This …
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