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Showing 1 to 12 of 12 for “"chromotography"”.
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Chromotography for Amino Acid Analysis of Tissue Culture Media
The first phase of the problem was to become acquainted with paper chromatography and to find the technique which would be most suitable for subsequent experiments. A modification of Redfield's (29) method of two-dimensional paper chromatography was used. Slight changes were made with his method …
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Development and partial validation of a method for the quantification of benzodiazepines and antidepressants in whole blood, serum and urine by liquid chromotography - Tandem mass spectrometry
The aim of this project is to develop a single quantification method for certain benzodiazepines, opiates and antidepressants in whole blood, serum and urine by LC-MS/M5 and to consequently validate the analytical method for official use in the Division of Pharmacology at the University of Cape …
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Characterization of a novel tetracycline resistance gene from the Bacteroides transposons Tn4351 and Tn4400
… be separated from tetracycline by thin layer chromotography or by reverse phase liquid chromotography. Altered tetracycline has a UV-vis absorption peak at 258nm, rather than a peak at 364nm which is typical of tetracycline. Attempts to solve the structure of altered tetracycline were …
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The relationship of dietary beta-carotene intake and serum beta- carotene levels to the development of oral lesions in smokeless tobacco users
… levels were assessed by high pressure liquid chromotography. No correlation between dietary beta-carotene intake and serum beta-carotene levels was observed. Results of t-test analysis indicated no significant difference in the mean serum or dietary intake of beta-carotene between the groups. …
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Resistance to protein synthesis inhibitors in Coprinus cinereus
… An analysis using carboxymethyl-cellulose chromotography did not Identify any cytoplasmic ribosomal proteins conferring cycloheximide resistance. CY 8.2 was one of 174 cycloheximide-resistant mutant strains produced by the ultraviolet mutagenesis of cycloheximide-sensitive strains, …
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A kinetic study of the base catalyzed esterification of propionic anhydride with isopropyl and n-propyl alcohols using a high frequency oscillometer
… of complexes (Hara 1952 ) , and in the field of chromotography (Baumann and Blaedel 1956; Honda 1953, 1954) .</p> <p>When conductance or dielectric constant changes during the course of a reaction, reaction rates can be studied. Since no electrodes are present, the possibility of electrode …
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Synthesis and Characterization of Injectable Star-shaped Poly(Lactide-co-Glycolide-co-Acrylate) Macromers
… magnetic resonance (NMR) and gel permeation chromotography (GPC) are used to characterize polymer chemical structure and molecular weight distribution. Chapter three presents the synthesis method and results of NMR and GPC. Averagely, 2.5-3 units of lactides and glycolides are randomly added …
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Positive and negative immunoregulation of normal and tumor-bearing mouse T cell blastogenesis
… and enhancing components. Using anion exchange chromotography and slab gel electrophoresis, inhibitor and enhancing factors have been separated by charge. Treatment of M<sub>Φ</sub> with indomethacin did not abrogate release of inhibitor factor, suggesting that it was not prostaglandin. …
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Exploring Zirconia as a Column Packing Material
Zirconia is one of the most promising column packing materials for High Performance Liquid Chromatography (HPLC). The perfect HPLC support material should be energetically homogenous, have a high surface area on which different chemical species can reversibly attach and be physically and chemically …
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Exploration of Using Cyclodextrins as Novel Additives and Fining Agents in Wine
Volatile phenols are responsible for some off-odours in wine, for example, the objectionable smoky, ashy notes associated with smoke taint and the sweaty, horsey, barnyard character associated with Brettanomyces. Various strategies have been evaluated for use by the wine industry to ameliorate …
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‘Organics in ice’: Novel organic compounds in ice cores for use in palaeoclimate reconstruction
The majority of current ice core studies focus on analysing the inorganic component of atmospheric aerosol, trapped and preserved in the ice as a record of past atmosphere. However, this does not fully represent the make-up of atmospheric aerosol, which can be up to 50% organic. This thesis aims to …
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Development and Applications of Liquid Sample Desorption Electrospray Ionization Mass Spectrometry (DESI-MS)
<p>This dissertation introduces the development and the applications of liquid sample desorption electrospray ionization mass spectrometry (DESI-MS), a new ambient ionization method with focus on the direct analysis of liquid samples. A variety of new applications of liquid sample DESI are …