Molecular weight distribution and fermentation of mechanically pre-treated konjac enzymatic hydrolysates
| Autor: | Yong Cheng Shi, Weiwei Wang, Jennifer L. Hoeflinger, Yang Pan, Michael J. Miller, Jun Yang, Natale Vittori |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Polymers and Plastics Protein Hydrolysates Inulin Hydrolysate Mannans 03 medical and health sciences chemistry.chemical_compound fluids and secretions 0404 agricultural biotechnology Lactobacillus acidophilus Enzymatic hydrolysis Pellet Materials Chemistry Food science 030109 nutrition & dietetics biology Chemistry Depolymerization Organic Chemistry food and beverages 04 agricultural and veterinary sciences biology.organism_classification 040401 food science Molecular Weight Lactobacillus Fermentation Bifidobacterium Amorphophallus Lactobacillus plantarum |
| Zdroj: | Carbohydrate Polymers. 159:58-65 |
| ISSN: | 0144-8617 |
| DOI: | 10.1016/j.carbpol.2016.12.014 |
| Popis: | There is interest in novel fibers as potential prebiotics for new and reformulated food products. Two konjac glucomannan (KGM) hydrolysates were developed by enzymatic hydrolysis with (KGMH I) or without (KGMH II) mechanical shear pre-treatment. These were characterized and evaluated as fermentation substrates using five lactobacilli and three bifidobacteria. Enzymatic treatment of native KGM reduced the average molecular weights of supernatant and pellet by ∼3-fold. Additional mechanical shear pre-treatment further reduced supernatant and pellet molecular weights by 5% and 35%, respectively. We postulated that pulverized and depolymerized short-chain KGM would better promote the growth of lactobacilli and bifidobacteria. Most lactobacilli fermented KGM hydrolysates. Lactobacillus acidophilus and Lactobacillus plantarum fermented KGMH I and II better than they fermented inulin. Overall, bifidobacteria were not strong fermenters of KGM hydrolysates. Both pulverization and enzymatic depolymerization significantly affected KGM molecular weight, suggesting that human gastrointestinal bacteria can utilize KGM hydrolysates with reduced weights. |
| Databáze: | OpenAIRE |
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