Nachtigall, Carsten; Berger, Christiane; Kovanovic, Tijana; Wefers, Daniel; Jaros, Doris; Rohm, Harald published their research in Food Hydrocolloids on December 31 ,2019. The article was titled 《Shear induced molecular changes of exopolysaccharides from lactic acid bacteria》.Electric Literature of C6H12O6 The article contains the following contents:
Exopolysaccharide (EPS) producing lactic acid bacteria are known for their pos. effect on the texture of fermented dairy products, with their high water binding capacity causing changes in rheol. and syneresis reduction During manufacture, product texture is affected by shearing with an unknown impact on the properties of the EPS. By subjecting aqueous solutions of viscosity enhancing EPS from Streptococcus thermophilus DGCC7710 or dextran to defined shear treatments with a Microfluidizer, a cell disruption system or a toothed ring dispersion unit to apply different energy input, we investigated macromol. properties and the behavior in solution Despite the breakage of covalent bonds, spectroscopic NMR analyses revealed that repeating unit structure remained unchanged, whereas changes in macromol. properties such as intrinsic viscosity, hydrodynamic volume, and mol. mass strongly depended on energy input. The decrease of the dynamic viscosity of the polysaccharide solutions was significantly related to the observed decrease in mol. mass, and the impact of the EPS on technofunctional properties such as contribution to gel stiffness during acid gel formation was also affected. The results therefore indicate that mech. energy input through shearing should be considered because product texture may be altered as a consequence of a mech. breakdown of EPS mols. The experimental part of the paper was very detailed, including the reaction process of rel-(3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol(cas: 54-17-1Electric Literature of C6H12O6)
rel-(3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol(cas: 54-17-1) is oxidized in various tissues under either aerobic or anaerobic conditions through glycolysis; the oxidation reaction produces carbon dioxide, water, and ATP.Electric Literature of C6H12O6
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