Characterization of a facultatively psychrophilic bacterium, Vibrio rumoiensis sp. nov., that exhibits high catalase activity

Article Abstract:

A new strain of the facultatively psychrophilic bacterium Vibrio rumoiensis with high catalase activity has been studied. The strain, called S-1, was isolated from the drain pool of a fish procesing plant which uses H2O2 as the bleaching and microbiocidal agent. The gel electrophoresis of the cell extract revealed tha S-1 has only one kind of catalase. Its catalase activity was one or two orders of magnitude higher than those of C. glutamicum, S. aureus, P. fluorescens and five other species tested. The optimum temperature for catalase activity was 30 degrees C which was 20 degrees lower than that for bovine catalase.

Analysis, Microbial enzymes

---

Response of pathogenic Vibrio species to high hydrostatic pressure

Article Abstract:

High hydrostatic pressure has been shown to inactivate all strains of pathogenic Vibrio without inducing a viable but nonculturable state. Vibrio vulnificus ATCC 27562, Vibrio parahaemolyticus ATCC 17802, Vibrio cholerae non-O:1 ATCC 14547, Vibrio cholerae O:1 ATCC 14035, Vibrio mimicus ATCC 33653 and Vibrio hollisae ATCC 33564 were treated with 200 to 300 MPa for up to 15 minutes at 25 degrees Celsius. Cells already existing in a viable but nonculturable state appear to exhibit greater resistance to hydrostatic pressure.

Bacteria, Pathogenic, Pathogenic bacteria, Hydrostatic pressure

---

Growth of facultatively heterofermentative lactobacilli on starter cell suspensions

Article Abstract:

Facultatively heterofermentative lactobacilli (FHL) and their growth on starter cell suspensions are discussed. Study of FHL growth of homogermentative Lactobacillus helveticus cell suspensions showed osmotic lysis of the L. helveticus led to a significant ribose increase. As FHL growth took place ribose decreased. It appears the bacteria use ribose as a growth substrate.

Austria, Statistical Data Included, Research, Cheese, Lactobacillus, Fermentation, Molecular microbiology, Ribose

Similar abstracts:

• Abstracts: Stereospecific preparation of an excitatory amino acid antagonist with D-hydantoinase from Agrobacterium tumefaciens as a biocatalyst
• Abstracts: Evolutionary relationships of cultivated psychrophilic and barophilic deep-sea bacteria. part 2 Isolation of an amoeba naturally harboring a distinctive Legionella species
• Abstracts: Aerobic anoxygenic phototrophic bacteria. Bioenergetic aspects of halophilism. Biology of moderately halophilic aerobic bacteria
• Abstracts: Cloning and characterization of NADP-mannitol dehydrogenase cDNA from the button mushroom, Agaricus bisporus, and its expression in response to NaCl stress
• Abstracts: Candidate-gene studies of the atherogenic lipoprotein phenotype: a sib-pair linkage analysis of DZ women twins

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.