This study was embarked upon to obtain laboratory strains of lactic acid bacteria from some traditional fermented foods, with potential for the production of exopolysaccharides (EPSs), which is an important factor in assuring the proper consistency and texture of fermented food. One hundred and fifteen strains of Lactic Acid Bacteria (LAB) were isolated and characterized from some fermented dai...

Anaerobic granular sludge is composed of multispecies microbial aggregates embedded in a matrix of extracellular polymeric substances (EPS). Here we characterized the chemical fingerprint of the polysaccharide fraction of EPS in anaerobic granules obtained from full-scale reactors treating different types of wastewater. Nuclear magnetic resonance (NMR) signals of the polysaccharide region from ...

Yogurt was made using an exopolysaccharide-producing strain of Streptococcus thermophilus and its genetic variant that only differed from the mother strain in its inability to produce exopolysaccharides. The microstructure was investigated using confocal scanning laser microscopy, allowing observation of fully hydrated yogurt and the distribution of exopolysaccharide within the protein network....

A natural lactococcal isolate, Lactococcus lactis ssp. cremoris Ropy352, has been previously shown to express two phenotypically distinct exopolysaccharides (ropy and mucoid). This natural isolate was cultured on various media to explore the carbon requirements for exopolysaccharide expression. Ropy exopolysaccharide expression was optimal when grown in defined media rather than on M17-based me...

In this study, the biomass and exopolysaccharides (EPS) production in co-cultures of microalgae/cyanobacteria and macromycetes was evaluated as a technology for producing new polysaccharides for medical and/or industrial application. Based on biomass and EPS productivity of monocultures, two algae and two fungi were selected and cultured in different co-culture arrangements. The hydrosoluble EP...

INTRODUCTION Xylella fastidiosa (Xf) is a Gram-negative xylem-limited bacterium that causes Pierce’s disease (PD), plum leaf scald, almond leaf scorch, phony peach disease and many other diseases. For many plant species there is no resistant germplasm. Xylem vessels may be filled with exopolysaccharides produced by the bacterium, and pectins, gums and tyloses produced by the plant. There has be...

Most of the Gram-positive bacteria, including lactic acid bacteria, produce exopolysaccharides (EPS). EPS are either excreted into the growth medium (slime) or attached to the bacterial cell wall (capsules). They are long-chain, high molecular carbohydrate polymers. In dairy industry, EPS producing cultures provide the fermentation produced with viscosity, stability and water binding functions....

Biofilm formation is a complex, ordered process. In the opportunistic pathogen Pseudomonas aeruginosa, Psl and Pel exopolysaccharides and extracellular DNA (eDNA) serve as structural components of the biofilm matrix. Despite intensive study, Pel's chemical structure and spatial localization within mature biofilms remain unknown. Using specialized carbohydrate chemical analyses, we unexpectedly ...

Summary Ultrasound, as an innovative approach, is a suitable alternative for dairy heat processing and can effectively inactivate microorganisms. Its capacity in improving the bioactive functional properties of fermented products has been stated several studies. Increase amplitude ultrasound up to 60% provided significantly increase peptide content. This review provides comprehensive informatio...