The preparation methods of rice protein such as solvent distillation , enzymatic method , alkali distillation , physical separation and compound method , as well as the characteristics of them are discussed in this paper 介绍了制备大米蛋白的常用方法如溶剂提取、酶法提取、碱法提取、物理分离和复合提取法，并且探讨了各自的特点。
Results : the decoction of dioscorea bulbifera l has a fair antibacterial activity on staphyloccus aureus , escherichia coil and candida albicans . but it is superior of the organic solvent extract to the decoction 结果:黄药子水煎液对金黄色葡萄球菌、大肠杆菌、白色念珠菌的抑制作用较好,黄药子有机溶剂提取液的抑菌作用优于水煎液。
In order to study the influence factors of aoa of rose flowers , the effects of drying and extraction methods on the aoa of rose flowers were investigated . the results indicated that drying after high - temperature short - time pretreatment was rather effective to maintain their aoa ; the aoa of water extracts was stronger when the temperature was raised from 25 to 100 ; by using orthogonal test , the optimum extraction conditions of rose flowers were : solvent - 75 % ethanol ; ratio of material and solven - 1 : 10 ; extraction times - three times with 24 h at one time , at the room temperature . the extracts obtained by 75 % ethanol were fractionatedly extracted with petroleum , diethyl ether , ethyl acetate and n - butanol in turn , and the various fractions " aoa were analyzed 为了探讨玫瑰花抗氧化活性的影响因子，比较了不同干燥方法、提取方法对其抗氧化活性的影响，发现：经短时高温处理后再进行干燥有利于较好地保持玫瑰花的抗氧化活性；以水作溶剂提取时， 25 100范围内水提液的抗氧化活性随着温度的升高而增强；通过正交实验筛选得到常温下玫瑰花抗氧化活性物质的最佳提取方法为： 75乙醇为溶剂，液料比1 ： 10 ，提取3次，每次24h ； 75乙醇提取物依次用石油醚、乙醚、乙酸乙酯、正丁醇等有机溶剂进行两相分部萃取，发现玫瑰花的抗氧化活性物质主要存在于乙酸乙酯部，说明玫瑰花抗氧化活性主要成分可能是单宁类、黄酮苷类和原花色素类化合物； 4
Abstract : the total quantity of perylene quinonoids in hypocrella bambusae ( b . et br . ) sacc . , shiraia bambusicola p . henn and culture substance of ascomycetes hypocreacae ( fr ) tul . sp . were determined with spectrophotometric methods . the relative extraction efficiency were studied when ethanol , acetone and chloroform were used as solvents . among them acetone was the best one 文摘:用分光光度法测定了竹红菌、竹黄和菌寄生菌培养物中?醌类化合物的总量；同时研究了以无水乙醇、丙酮和氯仿为溶剂提取?醌类化合物的相对效率，结果发现以丙酮为溶剂最合适。
