The effect of several physical methods on the separation rate of mucilage gel from Brasenia schreberi was investigated. In addition, the effects of ultrasound treatment on the texture characteristics, rheological properties, chemical content and inhibitory enzyme activity of mucilage gel in different drying methods were also investigated. The monosaccharide composition of mucilage gel polysaccharide was determined by GC-MS. The highest yield ( (78.97±3.83)%) of mucilage gel was obtained by ultrasound treatment with an energy density of 4 800 J/g. The viscosity of ultrasound-treated mucilage gel samples decreased significantly and exhibited near-Newtonian flow behaviour. Furthermore, the ultrasound treatment at high scanning frequency significantly increased the loss modulus (G & quot;) of the mucilage gel, and increased its viscosity. The mucilage gel contained a high content of total carbohydrate (524.4-552.8 mg/g) and polyphenols (208.3-228.5 mg GAE/g). Mucilage gel also had a certain inhibitory effect on α-glucosidase and α-amylase activity. The monosaccharide composition of mucilage gel polysaccharide was rich in galactose (41.79%) and xylose (18.72%), while mannose (4.29%), rhamnose (7.13%), arabinose (1.02%), glucose (4.55%) were also identified as minor monosaccharide. Therefore, ultrasound treatment contributed to the separation of mucilage gel and could remarkably change the physical properties of gel, while kindly preserved photochemicals and their bioactivities.
SUN Yuxin
,
MAO Shuifang
,
CHEN Yinning
,
DING Zhe
,
LI Yutong
,
XIA Xiyue
,
CHENG Hao
,
FENG Simin
. Effect of ultrasonic treatment on the separation, physical properties of mucilage from Brasenia schreberi[J]. Food and Fermentation Industries, 2020
, 46(2)
: 55
-60
.
DOI: 10.13995/j.cnki.11-1802/ts.021944
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