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https://www.selleckchem.com/TGF-beta.html 75 exhibited the highest specific activity (namely, 1.05 IU/gMCF0.75) with an immobilization yield of 52.1%. Furthermore, it was noted that the immobilization yield and the specific activity of the FDH/MCF0.75 varied as a function of the supported enzyme as the enzyme loading increased the immobilization yield decreased while the specific activity increased. Finally, the reuse test has been carried out, and a residual activity greater than 70% was found after 5 cycles of reaction.A pyruvated exopolysaccharide designated as LPE-1 was isolated and purified from the fermentation broth of Lactobacillus plantarum AR307 and characterized for its chemical structure. The results indicated that LPE-1 contained galactopyranose (Galp) and glucopyranose (Glcp) at a molar ratio of 2 1. The weight-averaged molecular weight (Mw) of LPE-1 was 605 kDa, with a polydispersity index (PDI) of 1.57, intrinsic viscosity ([ƞ]) of 3.28 dL/g, Mark-Houwink-Sakurada exponent α of 0.65 and gyration of radius (Rg) of 36.10 nm. The results of GC-MS and NMR revealed that pyruvate (Pyr) was found to form cyclic ketals at O-4 and O-6 position of terminal galactopyranose (T-Galp). The backbone of LPE-1 was identified to be consisted of 1,4-β-D-Glcp (23.19%), 1,4-α-D-Glcp (11.38%) and 1,4,6-β-D-Galp (12.05%), branched by 1,6-β-D-Galp (38.88%) at O-6 position of 1,4,6-β-D-Galp residue and terminated by T-β-D-Galp (5.60%) or T-β-D-(4,6-Pyr)-Galp (8.90%). A possible structural unit was proposed for LPE-1 as follows where Galp* is either T-β-D-(4,6-Pyr)-Galp or T-β-D-Galp. The presence of pyruvate group in LPE-1 would play an important role in improving the viscosity and plasticity of dairy products.A pH indicator film was prepared by mixing natural polymeric chitosan (CH) with natural dye from butterfly pudding extract (BP). The films were determined by color changes at different pH value, absorbance, thickness, moisture content, swelling property, water contact

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