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 17 of 17 for “"purification procedures"”.
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Investigation of purification procedures to isolate rat mitochondrial ẟ - aminolaevulinic acid synthetase
… from a mammalian source. 2. The sequence of purification steps that permitted the isolation of the high specific activity enzyme noted above was developed during the work reported here. The sequence of procedures finally used to purify a mitochondrial extract included 0-50% ammonium sulphate …
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Constituents of Aplysina Fistularis
… (HPLC) and classical fractionation and purification procedures. GC/MS indicated that many brominated tyrosine metabolites were accumulated in two A. fistularis samples, #852 and #947. By employing this technique, brominated hydroquinones; brominated phenylacetonitriles; brominated …
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Online Social Presence (OSP) In E-Tailing: Construct Development And Testing
… generation and qualitative and quantitative item purification procedures. PLS-SEM was employed to validate a twenty-one item validated OSP scale and establish nomological validity of the OSP scale and framework in the context of e-Satisfaction as an established outcome variable.</p>
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Synthetic and mechanistic investigation of new radical processes: reaction of organic azides with group-XIII Lewis acids
… the absence of both toxic reagents and tedious purification procedures. Allylindium dichloride seems a good substitute for dichloroindium hydride for generation of indium centred radicals under photolytic conditions, since it allows allylation of electrophilic azides (e.g. phenylsulfonyl azide) …
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Separation of fission products from irradiated uranium by peroxide precipitation
… of uranium as the peroxide has been used as a purification procedure since the early days of the Manhattan Project. The procedure has successfully produced an extremely pure product when handled in small batches. Heretofore peroxide precipitation has been utilized for relatively pure fuel from …
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Recovery of Xylitol from Fermentation of Model Hemicellulose Hydrolysates Using Membrane Technology
… is very expensive because of the extensive purification procedures. Microbial production of xylitol is being researched as an alternative method for xylitol production. Apart from the chromatographic separation method and activated carbon treatment, no other separation method has been …
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Studies on the specificities of <i>In Vivo</i> and <i>In Vitro</i> bioassays used in the potency determination of Therapeutic Erythropoietin
… set - one produced by different culture and purification procedures, the other consisting of a batch of pharmaceutical-grade Epo separated into fractions by ion-exchange HPLC. Investigations were carried out by means of the most sensitive assay developed as well as a range of biological, …
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Treponema hyodysenteriae: growth and production of hemolysin
… the induction of hemolysin, (iv) examine various purification procedures for nipid, efficient partial purification of the hemolysin, (v) separate the hemolysin from the RNA core carrier, and (vi) to detennme whether T. hyodysenteriae can use coprostanol, the most common intestinal sterol, to …
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Novel approaches to the synthesis of selenium modified nucleosides, nucleotides and nucleic acids
… were isolated using standard deprotection and purification procedures and subsequently characterised by mass spectrometry and circular dichroism. The CD spectra of both modified and native duplexes derived from self-complementary sequences with A-form, B-form or mixed conformational preferences …
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Genetics and Ecology of the Invasive Marine Alga, Sargassium Miuticum within Wales: A Multidisciplinary Approach to a Management Problem
… that in future studies, more stringent DNA purification procedures may help resolve the problems of reproducibility. Results from the population ecology investigations demonstrated variability in plant morphology dependent on environmental conditions. Growth and reproductive phenology of the …
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Characterisation of fibrinogen and fibrin proteolysis by the neutrophil membrane
… and fibrin degradation products. Whilst enzyme purification procedures were unsuccessful, several observations made during these attempts suggested that the neutrophil membrane associated proteolytic activity displayed similar characteristics to proteases of the azurophil granule. The …
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A family of multi-functional phosphorescent bioprobes based on the PtPFPP scaffolding moiety
… for benchmarking. The chemical synthesis and purification procedures were optimized for all the new derivatives to achieve high reaction yields and scalability, and new chemical structures were confirmed by HR-MS and NMR. Then, the most promising derivatives were assessed for their spectral …
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Bacteriocinogenic potential of lactic acid bacteria isolates from artisanal fermented meat products
… be the use of their bacteriocins after semi-purification or purification procedures. Fresh sausage was prepared and inoculated with different combinations of L. curvatus 12 (bacteriocinogenic BAL), L. sakei ATCC 15521 (non bacteriocinogenic BAL), L. monocytogenes, nisin and partially purified …
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ApolipoproteinE-Sendai (Arg 145 ->Pro) : Expression, Reinigung und Charakterisierung einer Apolipoprotein E-Variante, die mit der Lipoprotein-Glomerulopathie assoziiert ist
Varianten des Apolipoprotein E(ApoE)sind in Zusammenhang mit der Lipoprotein-Glomerulopathie aufgetreten, einer neuen Nierenerkrankung, bei der es zur Ablagerung von Lipoproteinen in glomerulären Kapillaren kommt. Ein Drittel der betroffenen Patienten sind heterozygot für ApoE-Sendai(Arg145->Pro). …
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Nucleic acid sample preparation using magnetic ionic liquids as cell lysis and DNA extraction solvents
… rapid results, innovative cell lysis and DNA purification procedures should be investigated to improve sample throughputs while ensuring sample purity.Magnetic ionic liquids (MILs) are molten salts that exhibit magnetic susceptibility due to a paramagnetic component within the chemical …
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I. Multicatalysis: Development of a BiOTf₃-catalyzed Nucleophilic Addition/Hydrofunctionalization Reaction in the Synthesis of Complex Heterocycles; . . .
… unfriendly due to waste generated during purification procedures. A way to circumvent problems posed by iterative synthesis is through the development of multicatalytic protocols, in which multiple, distinct synthetic steps can be performed in one reaction pot. Saturated 5-membered oxygen- …
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Enzyme activities associated with gonadotropic hormones
… to the hormone or due to contaminants, extensive purification procedures were carried out. Hydrophobic interaction chromatography (HIC) and soybean trypsin inhibitor-affinity chromatography were found to effectively separate the protease activity from the hormone, indicating the presence of …