1,720,974 research outputs found
Il latte di soia come alimento probiotico con Bifidobacterium spp.
No full textThe use of bifidobacteria as probiotic starters in the production of fermented foods can be extended also to soymilk considered for its nourishing peculiarity alternative to milk. The product obtained on the ground of used bacteria shows a significant decrease of stachyose and raffinose known as antinutritional factors and a good ratio of lactic and acetic acid
Studi innovativi dell'attività esterasica in Saccharomyces cerevisiae
No full textKeeping into account the important role of yeast in the final aromatic profile of wine, in this reasearch the authors studied the yeast esterase activity that is involved in the double mechanism of synthesis and hydrolisis of ester
Characterization of Bifidobacterium strains for use in soymilk fermentation
No full textSoybean milk, which serves as a base for a variety of beverages, contains raffinose, stachyose, pentanal and n-hexanal; theformer two may be responsible for flatulence after fermentation, whilst the latter two for a beany flavour. Twenty-seven strains of Bifidobacterium were analyzed for their a-galactosidase activity and the production of lactic and acetic acids to determine their potential for use in the production of fermented soymilk. The behaviour of three strains in soymilk was studied to determine their ability to reduce a-D-galactosyl oligosaccharides and produce lactic and acetic acids. They all were able to reduce stachyose and raffinose. Pentanal and n-hexanal were metabolized by Bifidobacterium breve MB233. These data indicate that bifidobacteria can be used for biotechnological processes that employ soymilk as the substrate. A productwith low levels of a-D-galactosyl oligosaccharides and alkylic aldehydes may be obtained
Bietole danneggiate e tempo di sosta: variazione del valore tecnologico e di attività enzimatiche del metabolismo glucidico
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Enhanced microbial cell lysis by the use of lysozyme immobilized on different carriers
No full textLysozyme was immobilized on chitosan and silica gel by adsorption, on cross-linked polystyrene divinylbenzene matrix (Deacidite KMP) by ionic binding and on non-porous glass beads by covalent attachment to improve the lytic activity towards complex substrates such as Micrococcus luteus. The lysozyme immobilization yields decreased on decreasing the amount of enzyme loaded, whereas the activation yields (defined as percentage ratio of immobilized active enzyme to immobilized enzyme) increased. Chitosan, silica gel, Deacidite KMP and non-porous glass bead preparations showed activation yields of 10%, 13·20%, 26·67% and 12·77%, respectively. © 1992
Valutazione del danno da benna e conseguenti implicazioni chimiche ed enzimatiche sulla conservazione in cumulo di radici di bietola
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