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Pulverization Using Liquid Nitrogen Significantly Improves Physical Properties of Powder and Extraction Yield of Polysaccharides of Astragalus mongholicus

  • Zuanhao Liang , Bing Du EMAIL logo , Lanhua Xie , Zhang Jiayi , Fengying Lin , Yu Xia and Yanjie Zhang
Published/Copyright: January 10, 2017

Abstract

Astragalus mongholicus is a famous traditional Chinese medicinal herb because of its human health benefits and bioactive compounds. Pulverization process directly affects quality and dissolution of bioactive compounds of A. mongholicus. In the present study, liquid nitrogen was introduced to pulverization process of A. mongholicus. The pulverization with addition of liquid nitrogen (LNP) effectively retained powder color, crushed tissue fiber, and reduced hardness of A. mongholicus. Furthermore, LNP significantly improved elasticity and solubility of the powder, as well as soluble solid contents. In addition, extraction yield of polysaccharides, characteristic bioactive compounds in A. mongholicus, was increased by 10.5 % by combination of LNP and Tween-80 enzyme extraction. These results suggest that LNP can be a promising technology for preparation of A. mongholicus powder. The information will also contribute to improvement of manufacturing technology of Chinese medicinal herb.

Funding statement: This study was supported by the Project on the Integration of Industry, Education and Research of Guangdong Province (2014B090904044 and 2016B090918093), and Agricultural Project funded by Guangdong Province Science and Technology Program of China (2012B020311006). We are grateful to all staffs from South China Agricultural University (Guangdong, China) and Guangyi Herbal Planting Co., Ltd. (Inner Mongolia, China) for their assistance in the experiments.

Abbreviations

AP

Astragalus polysaccharides

LNP

Liquid nitrogen pulverizing technology

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Published Online: 2017-1-10
Published in Print: 2017-2-1

©2017 by De Gruyter

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