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 164 for “"biotransformation"”.
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BIOTRANSFORMATION AND MUTAGENICITY OF BENZIDINE
… environments and to determine what effect such biotransformation would have on the mutagenicity of the compound. Bacteria were collected from sites of toxic waste dumping and from estuarine, lake, and ocean locations. Sediment and water samples as well as bacterial isolates were incubated in …
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Fungal biotransformation of morphine alkaloids
… strains screened for their ability to affect biotransformation of morphine alkaloids include Cunninghamella echinulata, Helicostylum pirijorme, Pycnoporus sanguinea, Pycnoporus cinnabarina, Curvularia lunata and Sporotrichum sulfurescens. The research demonstrated that Cunninghamella …
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Cobalamin-Enhanced Anaerobic Biotransformation of Carbon Tetrachloride
… adding catalytic amounts of cobalamins improves biotransformation of high concentrations of CT by increasing the rate and minimizing the accumulation of hazardous products. Relatively low adsorption of CN-Cbl in sand indicated that adding cobalamins to groundwater for in situ bioremediation may …
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Cobalamin-Enhanced Anaerobic Biotransformation of Carbon Tetrachloride
… of hazardous metabolites and the inhibition of biotransformation when CT is present in the milligram per liter range has limited its application. The purpose of this study was to evaluate the potential of improving the product distribution and rate of biotransformation at high CT concentrations …
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Enzymatic fuel cells via synthetic pathway biotransformation
… short lifetime of the cell. Synthetic pathway biotransformation is a technology of assembling a number of enzymes coenzymes for producing low-value biocommodities. In this work, it was applied to generate bioelectricity for the first time. Non-natural enzymatic pathways were developed to …
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The disposition and biotransformation of nizatidine in man
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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Biotransformation studies on tobacco cembranoids using plant cell cultures
This thesis deals with the biotransformation studies on tobacco cembranoids using the plant cell culture lines coded as TRP4a and T-43-T which are derived from Tripterygium wilfordii, an important Chinese herbal plant, and Nicotiana sylvestris, respectively. The studies are divided into three …
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Environmental biotransformation of chiral polychlorinated biphenyls and their metabolites
… their metabolites in organisms. Stereoselective biotransformation and bioaccumulation were identified as two major reasons for the different environmental fate of PCB atropisomers. Other affecting factors, such as presence of nanoparticles and changes in feeding ecology of organisms, also affect …
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Biotransformation of aromatic hydrocarbons and organic sulphides by fungi
Toluene is converted to benzyl alcohol by the fungi Mortierella isabellina and Helminthosporium species; in the latter case, the product is further metabolized. Toluene-a -d 1 , toluene-a,a-d2, and toluene-a,a,a-d 3 have been used with Mortierellaisabellina in a series of experiments to determine …
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When chemistry meets microbiology: Biotransformation of emerging organic contaminants
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Ammonia-monooxygenase-mediated cometabolic biotransformation and abiotic transformation of micropollutants
Biotransformation of a number of micropollutants (MPs) has been found to positively correlate with nitrification activities in inhibition studies of nitrifying activated sludge communities. To further elucidate roles played by ammonia-oxidizing bacteria (AOB), and nitrite-oxidizing bacteria (NOB) …
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Studies on the biotransformation of chromium (VI) by methane oxidising bacteria.
Bioremediation is a promising and cost-effective technology widely used to clean up waste containing organic or inorganic contaminants. Cr(VI), the highest oxidation state of the metal chromium, is widely used in various industries, and is extremely toxic to animals and humans. Utilisation of …
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Biotransformation von N-Alkyl- und N,N-Dialkylarylaminen durch Bacillus megaterium
… Arbeit wurden Studien zur bakteriellen Biotransformation von N Alkyl- sowie N,N Dialkylarylaminen mit dem Ziel der arylischen Hydroxy-lierung und N-Dealkylierung durchgeführt. Bodenproben wurden einem Screening-Verfahren unterworfen, um selektiv nach Mikroorganismen zu suchen, die zu den …
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Biotransformation of the Phytoalexins Brassinin, Brassilexin and Camalexin by Alternaria brassicicola
… and characterization of the metabolites of biotransformation of brassinin, brassilexin and camalexin by A. brassicicola; 2) determination of the antifungal activity of these phytoalexins and their metabolites against A. brassicicola. The phytoalexins were synthesized and characterized using …
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Interactions of ionic liquids with uranium and its implications on biotransformation
… of ILs with uranium and their effects on the biotransformation of uranium. My research focused on: (1) the interactions between uranium and ionic liquids in aqueous solution; and (2) biotransformation of uranium in the presence of ILs. The interactions between three representative ionic …
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Geomycology: fungal bioweathering, bioleaching, bioprecipitation and biotransformation of metals and minerals
… roles in the biosphere, particularly element biotransformations and biogeochemical cycling, metal and mineral transformations, decomposition, bioweathering, and soil and sediment formation. Fungi can apply various mechanisms to effect changes in metal speciation, toxicity and mobility, mineral …
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Development of Building Blocks - Thermostable Enzymes for Synthetic Pathway Biotransformation (SyPaB)
… energy security. Cell-free synthetic pathway biotransformation (SyPaB) is the implementation of complicated chemical reaction by the in vitro assembly of numerous enzymes and coenzymes that microbes cannot do. One of the largest challenges is the high cost and instability of enzymes and …
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Toxicity and biotransformation of 1,1,1,3,3-Pentafluoropropane, 3,3,3-Trifluoropropionic acid and 1,1,1,3-Tetrachloropropane
The biotransformation of 1,1,1,3,3-pentafluoropropane was investigated in rats and in in vitro systems. First, the metabolites were identified in vivo using GC/MS and 19F NMR analysis. The main metabolite was identified as trifluoroacetic acid, the minor metabolite as 3,3,3-trifluoropropionic acid …
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Biotransformation and distribution of selenium in cultures of a salt-marsh yeast
The essentiality and toxicity of selenium makes its biogeochemical cycling and global distribution of great interest for human health. Selenium-reducing yeast and fungi are important contributors to the selenium cycle, yet there have been few studies of both particulate Se accumulation and Se …
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