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Filtering by: Creator Collins, Melvin D. Remove constraint Creator: Collins, Melvin D. Advisor Sandine, William E. Remove constraint Advisor: Sandine, William E. Decade 1960-1969 Remove constraint Decade: 1960-1969

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  • Metabolism of aroma bacteria as related to diacetyl production

    Creator:
    Brown, Ruth Elaine
    Abstract:
    Factors influencing diacetyl production by the aroma bacteria Leuconostoc citrovorum and Streptococcus diacetilactis were investigated. When grown in association with lactic streptococci, L. citrovorum strain 91404 decreased in cell numbers from 10⁸ to 10⁶ over two weeks of daily subculturing in sterile non-fat milk incubated at 21°C. The ability to...
    Resource Type:
    Masters Thesis
    Full Text:
    and Collins (19 66 a, b) . Metabolism of Aroma Bacteria as Related to Diacetyl Production I

  • Host range and chemical composition of lactic streptococcal bacteriophages

    Creator:
    Henning, David Ralph
    Abstract:
    Comparisons were made of the abilities of Streptococcus lactis, Streptococcus cremoris and Streptococcus diacetilactis bacteriophages to endure various laboratory isolation and storage treatments. Neutralization of Cottage cheese whey containing phages offered no survival advantage over unneutralized samples, refrigeration of neutral and acid whey samples increased the survival of only the...
    Resource Type:
    Dissertation
    Full Text:
    streptococcal bacteriophages AN ABSTRACT OF THE THESIS OF DAVID RALPH HENNING for the Ph. D. in MICROBIOLOGY

  • Some factors influencing carbon dioxide production by Leuconostoc citrovorum

    Creator:
    Holmes, Beverly Ann
    Abstract:
    This study was undertaken to determine the role Leuconostoc citrovorum may play in carbon dioxide production in milk. The ability of L. citrovorum strains to produce gas was studied by two methods. A qualitative method used visual measurement of gas where an agar plug was forced up the neck of...
    Resource Type:
    Masters Thesis
    Full Text:
    -butanediol dehydrogenase 14 The work of Harvey and Collins (1961; 1962 a; 1962 b; 1963) using cell

  • Genetic homology and exchange in lactic acid streptococci

    Creator:
    Knittel, Martin Dean
    Abstract:
    The dairy industry relies primarily on consistent acid production by the lactic streptococci for the manufacture of certain cheeses and fermented dairy products. Variation in these cultures due to genetic exchange has not been thoroughly investigated. This study was undertaken to determine if genetic homology exists within the lactic group,...
    Resource Type:
    Dissertation
    Full Text:
    Ph. D. in Microbiology (Name) Date thesis is presented (Degree) (Major) r414(1 -)1rq (Ps

  • Studies on diacetyl production by Streptococcus diacetilactis matuszewski et al

    Creator:
    Seitz, Eugene Walter
    Resource Type:
    Dissertation
    Full Text:
    presence of citritase in cell -free ex- tracts of S. diacetilactis. Harvey and Collins (31, p. 954 -959

  • Properties of Pseudomonas aeruginosa resistant to quaternary ammonium compound

    Creator:
    Washam, Clinton Jay
    Abstract:
    Pseudomonas aeruginosa cells were selected for their ability to grow in the presence of 750 ppm alkyldimethylethylbenzyl ammonium chloride (QAC). These cells were found to retain their resistance to the germicide throughout tri-weekly transfers for 7 months in tryptone glucose yeast extract (TGY) broth containing no QAC. Comparisons of the...
    Resource Type:
    Dissertation