Effects of different drying methods on the physicochemical and antioxidative characteristics of Osmunda japonica Thunb. polysaccharides.

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Bibliographic Details
Title:	Effects of different drying methods on the physicochemical and antioxidative characteristics of Osmunda japonica Thunb. polysaccharides.
Authors:	Xiaochen Liu¹, Xiuling Zhang¹ zhangxiuling1968@126.com, Xueting Zhang¹, Fengfeng Li¹, Hengtian Zhao² zhaohengtian@163.com
Source:	Journal of Food Processing & Preservation. Oct2020, Vol. 44 Issue 10, p1-10. 10p.
Subjects:	Polysaccharides, Molecular weights, Uronic acids, Monosaccharides, Statistical correlation, Freeze-drying
Abstract:	To select a suitable drying pretreatment method to obtain biologically active polysaccharides with a required function, fresh Osmunda japonica Thunb. was subjected to natural drying (ND), hot air drying (HD), and vacuum freeze-drying (FD) treatments. After pretreatment, the O. japonica Thunb. polysaccharides (OPs) were extracted and denoted ND-OP, HD-OP, and FD-OP. The chemical composition, physicochemical characteristics, and antioxidant activities of the OPs were analyzed. The drying method substantially influenced the OPs. HD-OP had the highest yield (4.88%) and uronic acid content (9.17%) and the lowest molecular weight (252.54 kDa). Moreover, based on the correlation analysis, the high uronic acid content, low molecular weight, and unique monosaccharide composition may be closely related to the stronger antioxidant activity of HD-OP. The above results indicate that HD is the best method for the industrial production of high-quality OPs. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	To select a suitable drying pretreatment method to obtain biologically active polysaccharides with a required function, fresh Osmunda japonica Thunb. was subjected to natural drying (ND), hot air drying (HD), and vacuum freeze-drying (FD) treatments. After pretreatment, the O. japonica Thunb. polysaccharides (OPs) were extracted and denoted ND-OP, HD-OP, and FD-OP. The chemical composition, physicochemical characteristics, and antioxidant activities of the OPs were analyzed. The drying method substantially influenced the OPs. HD-OP had the highest yield (4.88%) and uronic acid content (9.17%) and the lowest molecular weight (252.54 kDa). Moreover, based on the correlation analysis, the high uronic acid content, low molecular weight, and unique monosaccharide composition may be closely related to the stronger antioxidant activity of HD-OP. The above results indicate that HD is the best method for the industrial production of high-quality OPs. [ABSTRACT FROM AUTHOR]
ISSN:	01458892
DOI:	10.1111/jfpp.14742