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exopolysaccaride production

Jin-Sun Kim, Je-Hyuk Lee, Jeonghee Surh, Soon Ah Kang, Ki-Hyo Jang
Bioconversion of aglycone-formed isoflavones from glycoside-formed isoflavones by commercial lactic acid bacteria in fermented soybean paste was evaluated. Enterococcus faecium KCTC 13410 showed the most resistant capacity and Lactobacillus acidophilus KCTC 3925 had a sensitive susceptibility at a high NaCl concentration (13.2%) in fermented soybean paste. Among the 5 strains tested, Lac. acidophilus KCTC 3925 showed the highest relative ratio of aglycone-formed isoflavones to total isoflavones in fermented soybean paste...
June 2016: Preventive Nutrition and Food Science
Yongmei Liu, Qiuya Gu, Fred Kwame Ofosu, Xiaobin Yu
A strain Agrobacterium HX1126 was isolated from soil sample near the canal in Wuxi. α-lactose was used as the sole carbon source for the production of an exopolysaccharide which was named PLHX. The highest production of PLHX (21.4g/L) was obtained under nitrogen depletion. PLHX composed mainly of glucose, with lower amounts of galactose and aminogalactose. The structure of the product was confirmed by NMR and FTIR and was identified as curdlan. This exopolysaccharide formed a gel when 30g/L was put in boiling water for 10min, with an achieved gel strength of 831g/cm(2)...
November 2015: International Journal of Biological Macromolecules
Olimpia Pepe, Valeria Ventorino, Silvana Cavella, Massimo Fagnano, Rachele Brugno
In the last few years the need to produce food with added value has fueled the search for new ingredients and health-promoting compounds. In particular, to improve the quality of bakery products with distinct nutritional properties, the identification of new raw materials, appropriate technologies, and specific microbial strains is necessary. In this study, different doughs were prepared, with 10% and 20% flour from immature wheat grain blended with type "0 America" wheat flour. Immature flour was obtained from durum wheat grains harvested 1 to 2 weeks after anthesis...
June 2013: Applied and Environmental Microbiology
Elisabeth Frei, Kelley Hodgkiss-Harlow, Peter J Rossi, Charles E Edmiston, Dennis F Bandyk
Vascular surgical site infection (SSI) is caused by pathogenic bacterial strains whose preferred mode of growth is within a surface biofilm. Bacterial biofilm formation can develop within hours to days in a wound and produces a recalcitrant infectious process especially in the presence of a prosthetic graft. The initial steps of biofilm formation are bacterial adhesion to biologic or inert surgical site structures followed by organism production of exopolysaccaride matrix which encases developing bacteria colonies to produce a protective microenvironment...
November 2011: Vascular and Endovascular Surgery
Alessandra Bragonzi, Dieter Worlitzsch, Gerald B Pier, Petra Timpert, Martina Ulrich, Morten Hentzer, Jens Bo Andersen, Michael Givskov, Massimo Conese, Gerd Doring
BACKGROUND: In patients with cystic fibrosis (CF), lung infection with mucoid Pseudomonas aeruginosa strains overexpressing the exopolysaccaride alginate is preceded by colonization with nonmucoid strains. We investigated the kinetics, impact of environmental signals, and genetics of P. aeruginosa alginate expression in a mouse model and in patients with CF. METHODS: Using indirect immunofluorescence, microarray technology and real-time reverse-transcription polymerase chain reaction, we assessed alginate gene expression during aerobic and anaerobic growth of the nonmucoid strain PAO1 in vitro, in a mouse lung-infection model and in sputum specimens from patients with CF infected with nonmucoid or mucoid P...
August 1, 2005: Journal of Infectious Diseases
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