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 14 of 14 for “"nitrogen analysis"”.
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Total and dissolved organic nitrogen analysis in an urban watershed
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2003.
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Abiotic nitrate reduction by redox activated iron-bearing smectites
… SWa-1 chemically reduced by sodium dithionite. Analysis of ferrous and total iron concentrations in the reduced clay was performed with a colorimetric 1,10-phenanthroline method before and after reaction with a dilute nitrate solution to observe reoxidation of the clay structure. This was paired …
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Determination of inhalation injury
… on the basis of clinical data, blood gas analysis, and bronchoscopy. Cardiopulmonary responses in the immediate post-injury phase of smoke inhalation have not been well delineated. A study of the responses to inhalation injury was undertaken to determine whether selected cardiopulmonary …
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Biogeochemical niche construction in the forest-fynbos mosaic of Jonkershoek Nature Reserve, South Africa
… status of these microhabitats. A detailed analysis of soil underlying forest and fynbos vegetation in Jonkershoek Nature Reserve was investigated. A total of nine soil pits were dug in forest and on fynbos slopes with high and low gradients. Pits were analysed by depth examining texture …
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Protein quality and digestibility of whole wheat as affected by drum-drying and single screw extrusion processing
… of the four diets was determined from Kjeldahl nitrogen analysis of feces. Amino acid composition, available lysine analysis, colorimetry (Hunter L, a, b color values), and Differential Scanning Calorimetry were also conducted to investigate the effects of thermal processing on protein quality. …
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Synthesis and Study of DL-2-Amino-4-Ethyloctanoic Acid
No abstract prepared.
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Combined anaerobic-aerobic treatment of a simulated textile effluent
… added. A combination of HPLC-UV, Total Organic Nitrogen analysis and respiration inhibition tests indicated that anaerobic degradation of the dye used in this STE produced aromatic amines that were removed aerobically. As the amines were degraded aerobically, some aerobic COD removal was due to …
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Quantification of biomass in a biooxidation system
… monitoring of a cell component such as protein, nitrogen and carbon. Biomass concentrations have been estimated using its metabolic activity by means of a maximum specific oxygen utilisation rate. The purpose of this study was to compare the various methods and test their suitability to the …
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Quantification of biomass in a biooxidation system
… monitoring of a cell component such as protein, nitrogen and carbon. Biomass concentrations have been estimated using its metabolic activity by means of a maximum specific oxygen utilisation rate. The purpose of this study was to compare the various methods and test their suitability to the …
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The effect of zinc levels on nitrogen retention in preadolescent children
… with the essential amino acids found by analysis to be most limiting with respect to whole egg protein. Threonine, valine, methionine, isoleucine, and lysine were added in amounts to reach a chemical score of 80 based on whole egg protein. The sources and amounts of nitrogen were: food, …
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INTERACTION OF POLYCYCLIC AROMATIC HYDROCARBONS WITH DISSOLVED AND SEDIMENT ASSOCIATED HUMIC MATERIALS (NMR, FLUORESCENCE)
… acid K(,oc) values. Carbon, hydrogen, and nitrogen analysis plus UV, infrared, and 13C solid state nuclear magnetic resonance (NMR) spectroscopy were used to investigate compositional and structural variations in humic materials. Three measures of the degree of C=C bond formation (UV …
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The ecology of colonial radiolarians : their colony morphology, trophic interactions and associations, behavior, distribution, and the photosynthesis of their symbionts
… measured and used for chlorophyll carbon and nitrogen analysis and counted for abundance of radiolarian and algal cells and tintinnid prey. Incorporation per unit length varied little within colonies Photosynthetic assimilation followed no predictable pattern as a function of light intensity. …
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Invasive fish effects on the invertebrate constituents of wetland communities
… fish and dabbling waterfowl using stable isotope analysis. Brook stickleback (Culaea inconstans) and pumpkinseed (Lipomis gibbosus) pose a potentially growing threat to temperate Pacific drainages of North America due to their ability to outcompete native fauna. Our study compares and contrasts …
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Influence of Chelating Agents on Proteolysis of Micellar Casein Slurries
… with only chelators. Percentage of water soluble nitrogen analysis (%WSN) was performed following Kjeldahl procedures to measure the break down of caseins into free soluble nitrogen and Urea-PAGE electrophoresis was used to measure the appearance of smaller peptides due to protein break down. …