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Determination of dimethylamine in barley malt

Creator:: Yoo, Lee-joung
Abstract:: Dimethylamine (DMA), in addition to the alkaloids hordenine and gramine, has been suggested as a potential precursor of nitrosodimethylamine (NDMA) in malt. Analytical procedures were adopted and applied to extract and quantify DMA from malt, green malt, malt roots and raw barley. Ground malt was extracted at room temperature with...
Resource Type:: Masters Thesis
Full Text:: in Barl ey Malt by Lee-Joung Yoo A THESIS submitted to Oregon State University in partial

Identification and quantitation of 3-hydroxy-N-nitrosopyrrolidine in fried bacon and fried-out fat

Creator:: Lee, Jae-sung
Abstract:: The formation of 3-hydroxy-N-nitrosopyrrolidine from decarboxylation of 4-hydroxy-N-nitrosoproline was demonstrated in model heating system designed to simulate the conditions of frying bacon. The identification of the nitrosamine was achieved by comparison of its TLC R [subscript f] value, gas chromatographic retention time, and mass spectral fragmentation pattern with those of...
Resource Type:: Dissertation
Full Text:: - nitrosopyrrolidine in Fried Bacon and Fried-out Fat by Jae-Sung Lee A THESIS submitted to Oregon State

Heterotrophic bacteria associated with a feed algae for oyster larvae

Creator:: Johnson, Lynn I.
Abstract:: Aerobic heterotrophic bacteria associated with oyster larvae feed algae Isochrysis galbana, Monochrysis lutheri and Pseudoisochrysis paradoxa were isolated and enumerated. The bacterial numbers ranged from 7.8x10³ to 3.9x10⁶ CFU per ml. The bacteria associated with Pseudoisochrysis sp. were identified and the majority of isolates belonged to genera Leucothrix (51%). Also...
Resource Type:: Masters Thesis
Full Text:: proposed classification scheme (Lee and Pfeifer, 1975). A large percentage of the organisms, however

Microorganisms isolated from sand filtered bay water and the proteolytic activity of a flavobacterium isolate

Creator:: Canhos, Vanderlei Perez
Resource Type:: Dissertation
Full Text:: enzyme produced was an extracellular serine protease, with a mw of 25,000- 30,000. This protease

Physicochemical Properties of Frozen Fish Muscle as Affected by Trimethylamine-N-oxide demethylase (TMAOase)

Creator:: Lee, Jinhwan
Abstract:: Gadoid fish, like Alaska pollock and Pacific whiting, have a high level of trimethylamine-N-oxide demethylase (TMAOase) that catalyzes the breakdown of trimethylamine-N-oxide (TMAO) to formaldehyde (FA) and dimethylamine (DMA) even during frozen storage. FA reacts with amino acid residues to promote covalent cross-links in the formation of inter- and intramolecular...
Resource Type:: Dissertation
Full Text:: Lee A DISSERTATION submitted to Oregon State University

Microbial characterization of cassava (Manihot esculenta Crantz) fermentation

Creator:: Ngaba-Mbiakop, Pierre Rolland
Abstract:: Micro-organisms associated with gari, produced in Cameroun, Africa, by the traditional method and that produced in the laboratory, were isolated, identified, and screened for their abilities to produce gari flavor. Gari production, under the controlled conditions was attempted utilizing these isolates and the dairy starter cultures. Some of the volatiles...
Resource Type:: Masters Thesis
Full Text:: : MICROBIAL CHARACTERIZATION OF CASSAVA (MANIHOT ESCULENTA CRANTZ) FERMENTATION : ^a _^___—_____ Abstract

Microbial flora of Pacific oysters (Crassostrea gigas) subjected to UV-irradiated seawater

Creator:: Vasconcelos, George Joseph
Abstract:: The microbial composition of Pacific oysters (Crassostrea gigas) subjected to UV-treated seawater was determined by quantitative and qualitative means. A total of 2,779 microorganisms were identified from seawater and oysters during a 72 hour sampling period employing a computer assisted replica-plating technique. UV treatment effectively eliminated coliforms and Pseudomonas Type...
Resource Type:: Masters Thesis
Full Text:: UV-IRRADIATED SEAWATER __!i ;: n Abstract approved: _ _ r. J. S. Lee The microbial

Nutritional and biochemical characterization of Moraxella species isolated from fishery sources

Creator:: Vernon, Stephen M.
Abstract:: One hundred and fourteen strains of Moraxella species isolated from marine fishery sources were investigated to determine the cause of this organism's predominance in seafood. The nutritional requirements, effect of pH, NaCl concentration, and temperature on growth, utilization of carbohydrates, protein, and lipid, resistance to 12 antibiotics, sensitivity to phenethyl...
Resource Type:: Masters Thesis
Full Text:: : Dr. Jong S. Lee One hundred and fourteen strains of Moraxella species isolated from marine

Characterization of Arthrobacter species isolated from marine and seafood sources

Creator:: McKenzie, Stephen M.
Abstract:: Forty Arthrobacter species isolated from Pacific and Atlantic fishery sources were examined to determine their significance in seafood. All strains were able to utilize inorganic nitrogen as the sole nitrogen source and grew in the absence of vitamins or growth factors. In addition, 78% grew on a medium containing only...
Resource Type:: Masters Thesis
Full Text:: 14% of total counts versus 40% for Moraxella. In a later study of Pacific shrimp, Lee and Pfeifer

Alteration of certain physiological and biochemical parameters in livers of rainbow trout fed methyl sterculate

Creator:: Struthers, Barbara Oft
Abstract:: The cyclopropene fatty acids, sterculic and malvalic, occur naturally in a major food lipid, cottonseed oil, and have been implicated in several physiological disorders. Rainbow trout in this study were fed semipurified diets containing 200 or 300 ppm methyl sterculate, and the effects on hepatic lipid and glycogen levels, lipid...
Resource Type:: Dissertation
Full Text:: , sterculic and malvalic, occur naturally in a major food lipid, cottonseed oil, and have been impli

ScholarsArchive@OSU

Determination of dimethylamine in barley malt

Identification and quantitation of 3-hydroxy-N-nitrosopyrrolidine in fried bacon and fried-out fat

Heterotrophic bacteria associated with a feed algae for oyster larvae

Microorganisms isolated from sand filtered bay water and the proteolytic activity of a flavobacterium isolate

Physicochemical Properties of Frozen Fish Muscle as Affected by Trimethylamine-N-oxide demethylase (TMAOase)

Microbial characterization of cassava (Manihot esculenta Crantz) fermentation

Microbial flora of Pacific oysters (Crassostrea gigas) subjected to UV-irradiated seawater

Nutritional and biochemical characterization of Moraxella species isolated from fishery sources

Characterization of Arthrobacter species isolated from marine and seafood sources

Alteration of certain physiological and biochemical parameters in livers of rainbow trout fed methyl sterculate

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