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广东省生物物理学会2013年学术研讨会

作者： Bing Li Siyuan Liu Xiaoqin Fu Zhenbo Xu Jianyu Su Xiaoxi Li Ling Chen Lin Li College of Light Industry and Food Sciences South China University of Technology

Considered to be a major active component of pumpkin,pumpkin polysaccharides play a significant role in regulating blood sugar level and blood lipid level,as well as in anti-cancer ***,its extraction and purification still remain a challenge for further application of pumpkin *** this study,raw pumpkin polysaccharides were concentrated by ultrafiltration under the physical fields such as ultrasonic field and electric *** only ultrasonic field,the effect of ultrafiltration time,temperature,ultrasonic power and ultrasonic frequency on the membrane flux of pumpkin polysaccharides was *** electric filed was applied,the electric power and pulse frequency mostly influenced the *** flux increased with the increasing of electric power,and it reached the maximum at the pulse frequency of 600 *** flux was greatly improved while the combination of ultrasonic field and electric field was *** conclusion,extraneous physical fields had been demonstrated to significantly reduce membrane fouling degree and improve membrane flux recovery rate,thus may further offer a solution t

关键词： pumpkin pumpkin polysaccharides ultrafiltration electric field ultrasonic field

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Effect of Process Parameters of Microwave Assisted Extraction (MAE) on polysaccharides Yield from pumpkin

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Journal of Northeast Agricultural University(English Edition) 2011年第2期18卷 79-86页

作者： ZHENG Xianzhe YIN Fangping LIU Chenghai XU Xiangwen Engineering College Northeast Agricultural University Harbin 150030 China

Process parameters of microwave assisted extraction （MAE） of the polysaccharides from pumpkin viz. extraction temperature, time and liquid-solid ratio were studied by using single factor and response surface methodology method. The results showed that the liquid-solid ratio was the most important factor in polysaccharides yield, followed the extraction temperature was the least important factor. The optimum microwave assisted extraction co by ndi extraction time, and tions for the highest polysaccharides yield from pumpkin （16.76%-4-0.38%） were obtained by using the response surface methodology with extraction time of 29 min, an extraction temperature of 79 ℃ and a liquid-solid ratio of 22 mL·g^-1. Validation experiment result well agreed with predicted value.

关键词： pumpkin polysaccharides microwave assisted extraction (MAE) response surface methodology (RSM)

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