The contents and compositions of polysaccharides and polypeptides in cereal vinegar sediment and vinegar ethanol precipitate were analyzed. The polysaccharides content, the sulfate group content and monosaccharide composition of polysaccharides, and the polypeptides content and hydrolyzed amino acids compositions were determined. The relative contents of polypeptides and polysaccharides found to be 67.4 g/100 g and 73.0 g/100 g in the vinegar sediment and vinegar ethanol precipitate, respectively. There were six kinds of monosaccharides in crude polysaccharides of vinegar sediment and vinegar ethanol precipitate. The relative content of glucosamine (27.4%) in the polysaccharides from vinegar sediment was significantly higher than that from vinegar ethanol precipitate (3.2%). The sulfate group content of crude polysaccharides in vinegar sediment and vinegar ethanol precipitate were 2.6% and 0.3%, respectively. There were 17 kinds of hydrolyzed amino acids in vinegar sediment and vinegar ethanol precipitate. The vinegar sediment had 27.4% essential amino acids and 15.9% branched amino acids, while the vinegar ethanol precipitate had 19.5% essential amino acids and 7.7% branched amino acids. Therefore, the nutritional value of polypeptides in vinegar sediment is higher than that in vinegar ethanol precipitate. This study overall provides references for understanding the components of vinegar sediment.
GONG Tingting
,
LU Zhenming
,
GENG Yan
,
LONG Rong
,
WANG Haixiang
,
SHI Xiaohe
,
SHI Jinsong
,
XU Zhenghong
. Analysis of polysaccharides and polypeptides in cereal vinegar sediment[J]. Food and Fermentation Industries, 2019
, 45(16)
: 245
-249
.
DOI: 10.13995/j.cnki.11-1802/ts.020518
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