Search Constraints

Start Over
Filtering by: Creator Stark, William D. Remove constraint Creator: Stark, William D. Advisor Sandine, William E. Remove constraint Advisor: Sandine, William E. Decade 1960-1969 Remove constraint Decade: 1960-1969

Search Results

  • Control of acid production and β-galactosidase synthesis in lactic streptococci

    Creator:
    Citti, James Edward
    Abstract:
    The public health and economic significance of rapid acid production by lactic streptococci in controlled dairy fermentations is well known. However, the fast acid-producing characteristic of these organisms is not stable, and cultures of fast organisms have been shown to contain slow cells. These studies were carried out to characterize...
    Resource Type:
    Dissertation
    Full Text:
    in lactic streptococci AN ABSTRACT OF THE THESIS OF JAMES EDWARD CITTI for the Ph. D. in

  • Mechanisms of lactose metabolism by strains of Streptococcus lactis

    Creator:
    Walter, Leslie Alva
    Abstract:
    Rapid acid production by lactic streptococci used in the manufacture of fermented dairy products is essential to the economy of the industry and to the public health of consumers. There remains to developed, however, an adequate laboratory procedure to detect and distinguish between slow and fast strains of these bacteria....
    Resource Type:
    Masters Thesis
    Full Text:
    : MECHANISMS OF LACTOSE METABOLISM BY STRAINS OF STREPTOCOCCUS LACTIS Redacted for Privacy William E. Sandine

  • 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

  • Pathways and enzymes involved in glucose catabolism by lactic streptococci

    Creator:
    Nandan, Rajiva
    Abstract:
    The enzymes and pathways involved in the catabolism of glucose by several strains of Streptococcus diacetilactis, Streptococcus cremoris, and Streptococcus lactis, commonly called the lactic streptococci, were studied. The presence of aldolase, triosephosphate isomerase and alcohol dehydrogenase in these organisms provided evidence for the operation of the Embden-Meyerhof-Parnas (EMP) pathway...
    Resource Type:
    Dissertation
    Full Text:
    IN GLUCOSE CATABOLISM BY LACTIC STREPTOCOCCI Abstract approved: Dr. William E. Sandine The

  • 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

  • Isolation of auxotrophic mutants of Bacillus cereus

    Creator:
    Keng, Jiun Guang
    Abstract:
    Bacillus cereus excretes large amounts of penicillinase into growth media during incubation, hence the widely-used penicillin selection technique for isolating biochemical mutants of bacteria is not applicable to this species. Genetic transfer in B. cereus has not been reported; this is partly due to the lack of an effective isolation...
    Resource Type:
    Masters Thesis
    Full Text:
    to certain chemicals. trn L926, Muller reported the production of mutations in D{-qeqE_+_lg by X

  • Studies on mutation and lactose fermentation in lactic streptococci

    Creator:
    Wagner, Sally Ann
    Abstract:
    This study involved an investigation of lactic streptococci which had irreversibly lost ability to produce the high levels of acid in milk necessary during the manufacture of certain fermented dairy products. The slow acid producing mutants studied were obtained from a normal acid producing strain by natural selection following induction...
    Resource Type:
    Masters Thesis
    Full Text:
    studies on S. lactis strains Bacteriophage patterns for S. lactis C2}. and slow acid producing mutants d

  • 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:
    Bacteria as Related to Diacetyl Production Abstract approved: Dr. William E. Sandine Factors

  • 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
    Full Text:
    William E. Sandine Pseudomonas aeruginosa cells were selected for their ability to grow in the

  • Some aspects of the mechanism of action of iodophor and other germicides on microorganisms

    Creator:
    Shikashio, Tommy Kiyoshi
    Abstract:
    The concentrations of iodophor necessary to reduce the activity of several metabolic enzyme systems 50 percent was used as the basic approach in attempts to elucidate the mechanism of germicidal action of iodine. For comparisons, a chlorine-releasing germicide (Trichlorocide) and a quaternary ammonium compound were also tested. It was found...
    Resource Type:
    Dissertation
    Full Text:
    Ph. D. (Name of student) (Degree) in Microbiology presented on March 17, 1969 (Major) (Date) Title