【摘 要】
：
通过正交试验确定微波处理的最佳工艺参数 ,用水煎煮法提取板蓝根多糖 ,用苯酚硫酸比色法测定多糖含量。结果表明 ,微波处理后 ,板蓝根粗多糖得率达到 33.0 6 2 ,多糖质量
【机 构】
：
中国农业大学农业工程研究院,中国农业大学农业工程研究院 北京清华东路17号中国农业大学(东校区)75信箱,100083
论文部分内容阅读
通过正交试验确定微波处理的最佳工艺参数 ,用水煎煮法提取板蓝根多糖 ,用苯酚硫酸比色法测定多糖含量。结果表明 ,微波处理后 ,板蓝根粗多糖得率达到 33.0 6 2 ,多糖质量分数达到 75 .2 11 ,优于单独使用水煎煮法。微波处理板蓝根的最佳工艺参数为水浸泡 1h,微波功率 4 80 W,处理时间 6 min;此工艺参数下 ,多糖得率和含量均明显提高
The optimum parameters of microwave treatment were determined by orthogonal test. Radix Isatidis polysaccharide was extracted by decoction and the content of polysaccharide was determined by phenol-sulfuric acid colorimetry. The results showed that after microwave treatment, Radix Isatidis crude polysaccharide yield reached 33.0 6 2 and polysaccharide mass fraction reached 75.21 1, which was better than water decoction. The optimum parameters for microwave treatment of Radix Isatidis were water soaking 1 h, microwave power 4 80 W, and treatment time 6 min. Under this process parameter, polysaccharide yield and content were significantly improved.
其他文献
The effects of cadmium stress on the growth, antioxidative enzymes and lipid peroxidation in two kenaf plants, Fuhong 991 and ZM412, were analysed under control
Climate change is recognized to increase the frequency and severity of extreme temperature events. At flowering and grain filling stages, risk of high temperatu
目的了解海军基层官兵抑郁的现状及抑郁与运动、训练伤、饮酒等的相关性。方法采用自编一般情况问卷、流调中心用抑郁自评量表对1 435名海军基层官兵进行问卷调查，SPSS18.0进行数据录入分析。结果1 435名海军基层官兵中，抑郁症状的总发生率为19.8%(284/1 435)，抑郁的发生与运动、训练伤、饮酒存在相关性。运动量多的官兵抑郁总分远低于运动量少的官兵；饮酒官兵的抑郁总分高于不饮酒官兵；有训
To compare the grain yield and growth behaviors of hybrid rice, field experiments were conducted in a subtropical environment in Changsha, Hunan Province, China
In 2010, Chinese maize yields increased from 961.5 kg ha-1 in 1949 to 5 453.8 kg ha-1. This increase is the result of genetic improvements, an increase in nitro
Stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most widespread and destructive wheat diseases in many wheat-growing regions of
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
肝性脑病(hepatic encephalopathy,HE)的发病机制十分复杂,且尚未完全阐明.高氨血症和氨中毒学说在HE发病机制中处于核心地位,但血氨水平与HE的严重程度并不完全一致.最新研究进展显示,大脑神经细胞的炎症反应、脑水肿以及神经递质传递障碍及其协同作用在HE疾病的发生与进展中同样起着重要作用.关键词：肝性脑病;发病机制