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 177 for “"environmental samples"”.
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Isotopic studies of selenium in environmental samples.
… sludge amended soils. The Se concentration in samples was determined using isotope dilution - mass spectrometry by gas chromatography - mass spectrometry (GC-MS). This was the first application of the determination of Se in environmental samples and the use of a benchtop GC-MS for those …
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Determination of Trace Inorganic Species in Environmental Samples
Made available in DSpace on 2014-12-13T20:09:47Z (GMT). No. of bitstreams: 1 7606988.pdf: 8070978 bytes, checksum: 66a41b832c297c2b88164300bd755a7b (MD5) Previous issue date: 1975
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Improving the measurement of butyltin compounds in environmental samples
… products dibutyltin and monobutyltin in environmental sediments and waters and to improve upon their measurement. For the analysis of sediments, a triple hexane/acetic acid extraction was employed of tropolone complexes of the organotin compounds. Grignard reagent derivatization and …
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Genetic analysis of bacteriophages from clinical and environmental samples
… sputum of patient with cystic fibrosis, CF) and environmental samples (a sludge from a dairy food wastewater treatment plant) containing rich bacterial populations using genetic and metagenomic analyses. Metagenomic sequencing of viruses obtained from these samples revealed that the majority of …
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Determination of actinide elements in environmental samples by ICP-MS
… elements in water, biological, soil and sediment samples have been developed using on-line solid phase extraction and high performance liquid chromatography (HPLC) coupled with inductively coupled plasma mass spectrometry (ICP-MS). Initial applications utilised a commercially available resin, …
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Determination of volatile nitrosamines in foods and other environmental samples
… have been reported to occur in foods and other environmental samples. Nitrosamines were removed from foods using a Likens-Nickerson extractor; 81% of added dimethylnitrosamine and 110% of added diethylnitrosamine were recovered from 10 ng/g spiked aqueous solutions. The factors affecting …
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Voltammetric and other properties of methylmercury compounds and distribution of methylmercury in environmental samples
<p>The reduction of aqueous methylmercury solutions has been studied using polarography and cyclic voltammetry at the dropping mercury electrode. By scanning a broad range of pH, pCl and methylmercury concentrations, a detailed reduction mechanism has been proposed. Reduction is shown to proceed in …
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Detection of viruses in environmental samples using rotating membrane ultrafiltration and thepolymerase chain reaction
… Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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Association of Campylobacter spp. Levels between Chicken Grow-Out Environmental Samples and Processed Carcasses
… of pre- or post harvest contamination. Environmental sampling in a poultry grow-out house, combined with carcass rinse sampling from the same flock may provide a relative assessment of Campylobacter contamination and transmission. Air samples, fecal/litter samples, and feed pan/drink …
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Epidemiology of Rhodococcus (Corynebacterium) equi in fecal and environmental samples from Kansas horses and locations
Call number: LD2668 .T4 1986 D42
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Epidemiology of Rhodococcus (Corynebacterium) equi in fecal and environmental samples from Kansas horses and locations
Call number: LD2668 .T4 1986 D42
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Extraction and analysis of pharmaceutical residues in environmental samples using SPE with LC-MS/MS
… detailing the presence of PPCPs in a variety of environmental matrices and compartments have been published in the peer-reviewed literature. However, in Ireland very little research has been conducted to determine the level of environmental contamination due to the presence of drug residues. The …
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Initial assessment of triplex PCR assay application for detection of toxic dinoflagellates, Alexandrium species (Dinophyceae), in environmental samples
… monitoring where analysis of large numbers of samples is required. Novel monitoring techniques, focusing mainly on probe technology, are being developed for rapid, unequivocal identification and enumeration of HAB species. In this study, a triplex peR assay, incorporating a genus-specific …
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Validation of the Planarian Bioassay With Defined Mixtures and Testing Against Other Bioassays With Contaminated Samples From Pakistan
… mixtures; (b) assess chemical contamination in environmental samples from selected areas in Pakistan where industrial contamination was suspected; (c) test the sensitivity of the planarian model and other bioassays to contaminated environmental samples and, in turn, assess the toxicity of the …
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Sorption of the platinum-group elements in selected solid matrices
… (PGE) has shown increased concentrations in environmental samples, probably as a result of the widespread use of PGE (Pt, Pd and Rh in particular) as catalysts in the chemical and car industry. Most of the recent research on PGE focuses on the analysis of concentrations in environmental …
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Surface Characteristics of Bacillus Spores
… and identification of spores from various environmental samples is necessitated because anthrax spores can be used as biological weapons. The hydrophobic nature of spores may allow for their rapid concentration and partial purification from contaminating materials. In this study, spores …
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Epidemiology of <i>Mycobacterium avium</i> complex infecting AIDS patients
… we attempted to recover M. avium complex from environmental samples in geographical areas (Boston, Massachusetts; Hanover, New Hampshire; Helsinki, Finland; Nairobi, Kenya; and Kinsasha, Zaire) located near <i>M. avium</i> infected AIDS patients. Although <i>M. avium</i> was recovered from …
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