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Filtering by: Creator Lee, Jong-Jan Remove constraint Creator: Lee, Jong-Jan Degree Level Master's Remove constraint Degree Level: Master's Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • Effect of polyphosphate on microbial characteristics of seafoods

    Creator:
    Petchsing, Urairatana
    Abstract:
    Effect of 6.0% polyphosphate treatment on microbial growth and composition of microbial flora of three representative seafoods were investigated. Polyphosphate treatment washed off microorganisms by 1 log in peeled shrimp (10⁷ to 10⁶ and 10⁶ to 10⁵) and cooked crab meat (10⁶ to 10⁵) and by 2 logs in red...
    Resource Type:
    Masters Thesis
    Full Text:
    POLYPHOSPHATE ON MICRQBIAL CHARACTERISTICS OF SEAFOODS i Abstract approved: Dr. Jong S. Lee Effect of

  • Inhibition of Escherichia coli trimethylamine-N-oxide reductase by food preservatives

    Creator:
    Kruk, Mark W.
    Abstract:
    Trimethylamine-N-oxide (TMA-0) reductase activity of resting cells of Escherichia coli was inhibited by tetrasodium ethylenediaminetetraacetate (Na₄EDTA), benzoic acid (BA), and methylparaben (MP). The 50% inhibitory concentrations of Na₄EDTA, BA, and MP were 20.2, 1.2, and 32.4 mM, respectively. BA at pH 6.5 or below most effectively inhibited the TMA-0 reductase....
    Resource Type:
    Masters Thesis
    Full Text:
    , Debber, whose love and perseverance made it possible. I would like to thank Dr. Jong S. Lee for his

  • Drug resistance, source, and environmental factors that influence fecal coliform levels of Tillamook Bay

    Creator:
    Kelch, William James
    Abstract:
    In order to determine the source of bacteria in Tillamook Bay, Oregon, water samples were collected monthly for six months during the rainy season from October 1975 through March 1976 from the bay and its tributaries, the Kilchis, Trask, Tillamook, and Wilson Rivers. Fecal coliform levels of these samples were...
    Resource Type:
    Masters Thesis
    Full Text:
    Computer Center for his assis- tance with computer problems. Finally, Dr. Jong Lee has served as a

  • 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:
    : / ~TT Jong S. Lee Forty Arthrobacter species isolated from Pacific and Atlantic fishery sources were

  • Dimethyl disulfide produced in sterile fish muscle by Pseudomonas putrefaciens

    Creator:
    Rhee, Kie Ho
    Abstract:
    Sterile fish muscle homogenate was prepared from the individually line caught black rockfish (Sebastes melanops) and inoculated with the pure culture of Pseudomonas putrefaciens strain 17. The inoculated homogenate was incubated at 5°C and the growth and production of volatile sulfur compounds determined by a combined gas-liquid chromatography and mass...
    Resource Type:
    Masters Thesis
    Full Text:
    : Jong S„ Lee Sterile fish muscle homogenate was prepared from the indi- vidually line caught black

  • Adhesive property of bacteria and its relationship to microbial spoilage of shrimp

    Creator:
    Smith, John B.
    Abstract:
    Pacific shrimp (Pandalus jordani) was washed repeatedly and the eluted bacteria were enumerated and identified. Selected isolates were tested for their adhesive properties. Washing reduced the microbial load by 3.84 to 42.04%. The bacteria which most resisted wash-off were Staphylococcus and Pseudomonas spp. The easiest to wash off was Flavobacterium...
    Resource Type:
    Masters Thesis
    Full Text:
    . Jong S. Lee Pacific shrimp (Pandalus jordani) was washed repeatedly and the eluted bacteria were

  • Inhibition of microbial growth in seafood by potassium sorbate

    Creator:
    Chung, Yuh-mei
    Resource Type:
    Masters Thesis
    Full Text:
    —-— -■ = Dr. Jong S. Lee The effect of potassium sorbate on microbial growth in seafood was tested by

  • 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

  • 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:
    . Jong S. Lee for all his help and guidance; Don Pfeifer for his assistance in lab; Wilber Breeze and

  • Preservation of dover sole by low-dose radiation and antimicrobial agents

    Creator:
    Shiflett, Maureen Adele
    Abstract:
    The storage life at 43°F of ground dover sole fillets (Microstomas pacificus) was determined microbiologically after treatment with ionizing radiation and antimicrobial agents. Sodium benzoate, potassium sorbate and the sodium salts of the methyl and propyl esters of parahydroxybenzoic acid (MPB and PPB) all approximately doubled the refrigerated storage life...
    Resource Type:
    Masters Thesis
    Full Text:
    express my sincere gratitude to Dr. Jong S. Lee for his constant encouragement and guidance. I