Search results for " lactobacillus"

Attitudini tecnologiche di batteri lattici starter per la fermentazione di olive verdi da mensa

2009

The main characteristics for lactic acid bacteria to be used as starter cultures for table olive production include the capacity to grow in presence of high concentrations of sodium chloride (NaCl) and phenols and at low temperatures. These bacteria have to show a homolactic fermentation for carbohydrates and the ability for a rapid acidification of brines. Other important traits for strain selection are represented by the expression of β-glucosidase enzymes, antimicrobial substances and flavoring metabolites. Lactobacillus plantarum and Lactobacillus pentosus are frequently employed as starter for table olives. Recently, lactobacilli/enterococci mixed starter cultures have been used for th…

Purification and characterization of an intracellular family 3 β-glucosidase from Lactobacillus sanfranciscensis CB1

2005

Lactobacillus sanfranciscensis CB1 uses cellobiose and other β-glucosides (methyl-β-glucoside, arbutin, amygdalin and salicin) as carbon sources. A hexameric ca. 288 kDa β-glucosidase was purified to homogeneity from Lact. sanfranciscensis CB1 by four chromatographic steps. The enzyme was optimally active at pH 7.5 and 40°C. It had a pI of ca. 4.38 and a D55°C value of ca. 27 sec. Almost total inhibition was found with sulfhydryl-modifying agents and divalent cations such as Cu2+, Co2+, Hg2+, Ni2+ and Fe2+ at a concentration of 2 mM. The enzyme was active towards β-(1→4) substrates such as p-nitrophenyl-β-D-glucoside, -D-galactoside and -L-rhamnoside, and cellobiose. The sequencing of four …

Biodiversity of Lactobacillus rossii strains isolated from sourdough

2005

LACTOBACILLI IN SOURDOUGH FERMENTATION: A REVIEW

2007

Sourdough technology is widely used; it is employed in bread making and for the production of cakes. Sourdough is characterized by a complex microbial ecosystem, mainly represented by lactic acid bacteria and yeasts, whose fermentation confers to the resulting bread its characteristic features such as palatability and high sensory quality. Investigation of the microbial composition of sourdough is relevant in order to determine the potential activities of sourdough microorganisms. This review focuses on the role of the most important group of sourdough fermenting bacteria that consists of lactobacilli; species that belong to the Lactobacillus genus are the main responsible of flavor develop…