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Filtering by: Creator Gilbert, William E. Remove constraint Creator: Gilbert, William E. Advisor Sandine, William E. Remove constraint Advisor: Sandine, William E. Decade 1980-1989 Remove constraint Decade: 1980-1989

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  • Microbiological control of food spoilage and pathogenic microorganisms in refrigerated foods

    Creator:
    Al-Zoreky, Nageb
    Abstract:
    Microgard, a commercially-available pasteurized fermented milk, was found inhibitory to gram negative bacteria such as Pseudomonas putida, some well-known foodborne pathogens (e.g. Salmonella, Yersinia and Aeromonas) and some fungi as revealed by an agar incorporation assay method. Gram positive bacteria, however, were not inhibited. Rather, some bacteria in this group...
    Resource Type:
    Masters Thesis
    Full Text:
    : William E. Sandine Microgard, a commercially-available pasteurized fermented milk, was found

  • Preservation studies on internal-pH-control-grown yogurt starters

    Creator:
    Matalon, Marcelo E.
    Resource Type:
    Masters Thesis
    Full Text:
    Starters Abstract approved: Redacted for Privacy William E. Sandine The ability of three phosphated

  • Studies to improve lactic acid bacterial starter cultures

    Creator:
    Khosravi, Lewa
    Abstract:
    Three commercial sausage starter cultures were grown in an internal-pH-controlled medium (PHASE 4) and in a soluble phosphate-buffered medium. The cultures were tested by comparing viable counts before and after freezing at -40 C or freeze-drying and subsequent storage for 3 months in the frozen or dried state. Strains varied...
    Resource Type:
    Dissertation
    Full Text:
    approved: Redacted for privacy William E. Sandine Three commercial sausage starter cultures were grown

  • Bacteriophages for Leuconostoc oenos : a survey of Oregon wineries

    Creator:
    Eschelbach, Matthew Michael
    Abstract:
    A study of malolactic bacteria of the Leuconostoc genus, especially L. oenos, and their bacteriophages was conducted. A search for the presence of infectious bacteriophages in grapes, musts, and juices employed in malo-lactic fermentation (MLF) was conducted; no evidence, either physical or biological, was found for the existence of these...
    Resource Type:
    Masters Thesis
    Full Text:
    WINERIES. Abstract approved: Redacted for privacy (fte°4,- Dr. William E. Sandine A study of malolactic

  • Antimicrobial resistance and plasmid properties of Leuconostoc and group N Streptococcus

    Creator:
    Orberg, Paulo K.
    Abstract:
    A method for rapid isolation of plasmid DNA from group N streptococci was developed. Chief advantages of the method were simplicity, the utilization of microliter quantities of reagents, and the obtainment of preparations highly enriched for covalently closed circular plasmid DNA. The method was also applied to over 15 Leuconostoc...
    Resource Type:
    Dissertation
    Full Text:
    : William E. Sandine A method for rapid isolation of plasmid DNA from group N streptococci was developed

  • Conjugal transfer of plasmid genes between lactic Streptococcus and Leuconostoc starter bacteria

    Creator:
    Tsai, Huai-jen
    Abstract:
    Mutants of Streptococcus lactis 7962 with various combinations of plasmid molecular masses were screened for nisin production. Nisin was produced by both wild type and mutants that contained a 17.5 Md plasmid, which was usually obscured by the chromosomal fragments. No nisin was produced by plasmid-free mutants. Sucrose fermentation and...
    Resource Type:
    Dissertation
    Full Text:
    approved: William E. Sandine Mutants of Streptococcus lactis 7962 with various combinations of plasmid

  • Genetics of Lactobacilli : plasmid profiles and genetic exchange

    Creator:
    Scarlett, Lori M.
    Abstract:
    Lactobacilli are microorganisms with many applications in the fermented food and dairy industries. In addition to the actual fermentation of food products, lactobacilli are involved in the metabolic breakdown of lactose in dairy products, enabling a large population of lactose-intolerant humans to ingest milk. Lactobacilli are also used as health...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: Redacted for privacy William E. Sandine Lactobacilli are microorganisms with many

  • Internal pH control starter media: use in culture preservation and for multiple strain growth

    Creator:
    Shigeno, Debra S.
    Abstract:
    Several bulk starter media, consisting of two experimental blends and four commercial preparations, were examined for each medium's ability to grow, preserve, and/or recover lactic streptococcal starter cultures. Nonfat milk was used as a control. Results showed that cultures which had the greatest survival rate in frozen storage had been...
    Resource Type:
    Masters Thesis
    Full Text:
    Privacy Dr. William E. Sandine Several bulk starter media, consisting of two experimental blends and

  • Characterization of Oregon-derived malo-lactic bacteria : fermentation properties and storage stability

    Creator:
    Dohman, Thomas Philip
    Abstract:
    Gram positive cocci isolated from Oregon wines were characterized and their relative malate fermentation abilities compared. They were heterofermentative, catalase negative, and facultatively anaerobic. Glucose, fructose, cellobiose, maltose, ribose, trehalose, salicin and esculin were fermented by all strains. Arabinose was fermented weakly but lactose, raffinose, sucrose, xylose, rhamnose, mannose and...
    Resource Type:
    Masters Thesis
    Full Text:
    : Redacted for Privacy Dr. William E. Sandine Gram positive cocci isolated from Oregon wines were

  • Lactic streptococcal agglutinins

    Creator:
    Salih, Mohammed Ali
    Abstract:
    Lactic streptococcal agglutinins are known to promote settling of starter bacteria in milk, resulting in spongy, mealy, shattered curd and sludge formation defects in cottage cheese. These agglutinins are natural antibodies secreted by lactating cows in mature milk in response to infections (mastitis) and in colostrum milk as protective antibodies...
    Resource Type:
    Masters Thesis
    Full Text:
    Chapter 1 LACTIC STREPTOCOCCAL AGGLUTININS: A REVIEW1 Mohammed Ali Salih and William E. Sandine