Index Catalog // ScholarsArchive@OSU

Enzymatic analysis of mutant and wild type lactic streptococcus organisms developing on a selective medium

Creator:: Turner, Nikki Edwards
Resource Type:: Masters Thesis

Studies on diacetyl production by Streptococcus diacetilactis matuszewski et al

Creator:: Seitz, Eugene Walter
Resource Type:: Dissertation

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

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

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

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

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

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

Lactic streptococci: growth characteristics and plasmid profiles of drug- and bacteriophage-insensitive mutants

Creator:: Wulf, John J.
Abstract:: Fast acid-producing streptomycin-resistant mutants for several strains of lactic streptococci currently used in commercial Cheddar cheese manufacture were isolated. Their isolation involved use of a recently developed differential plating medium that allows identification of fast acid-producing colonies. Both parents and mutants were characterized with regard to growth, acid production, proteolytic...
Resource Type:: Masters Thesis

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

ScholarsArchive@OSU

Enzymatic analysis of mutant and wild type lactic streptococcus organisms developing on a selective medium

Studies on diacetyl production by Streptococcus diacetilactis matuszewski et al

Genetic homology and exchange in lactic acid streptococci

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

Host range and chemical composition of lactic streptococcal bacteriophages

Studies on mutation and lactose fermentation in lactic streptococci

Pathways and enzymes involved in glucose catabolism by lactic streptococci

Metabolism of aroma bacteria as related to diacetyl production

Lactic streptococci: growth characteristics and plasmid profiles of drug- and bacteriophage-insensitive mutants

Antimicrobial resistance and plasmid properties of Leuconostoc and group N Streptococcus

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