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測量應用案例-20190602

來源:美國布魯克海文儀器公司   2019年06月17日 15:16  
 文獻名: Effect of ball milling time on physicochemical properties of Cordyceps militaris ultrafine particles

 

作者 Yanjun An1;  Yanan Sun1;  Min Zhang1;  Benu Adhikari2;  Zhongqin Li3

1State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China

2School of Science, RMIT University, Melbourne, Australia

3R & D Center, Yandi Biological Engineering Co., Ltd, Changde, Hunan, China

 

摘要:Cordyceps militaris powder with different particle sizes, a fungus rich in cordycepin and carotenoids, has different physicochemical properties. To explore the influence of different ball milling time on the properties, a batch ballmill was used before high energy nanoimpact mill to produce ultrafine particles from Cordyceps militaris. The particle formation kinetics was covering 2 to 16 hr of grinding was measured and explained. The surface charge (zeta potential), surface activity (surface tension), polarity and cordycepin, and carotenoids contents of particles during dissolution in water were measured and explained. The yield of ultrafine particles ~200 nm did not increase too much during 6–10 hr of grinding but they aggregated significantly at 16 hr of milling. The zeta potential, airwater surface tension reducing ability, and particle polarity of these ultrafine particles were particle size dependent. The dissolution of cordycepin and carotenoids in water was faster in these ultrafine particles but their dissolution patterns were different. The ultrafine particles of C. militaris can be preferably used in nutraceuticals and as emulsifiers.

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