查询词典 extraction

The relation between the concentration of gingerol and extraction time, size of herb particle and the extraction temperature are discussed respectively.

讨论了当一种条件改变时，姜辣素的提取速率与提取时间、药材粒度、提取温度等因素的关系。

Synergistic extraction technology of gingerol in ginger was studied by using an ultrasound wave and microwave synergistic extraction equipment.

研究超声波－微波协同萃取姜辣素的工艺条件。

Effects of solvent species, ethanol concentration, microwave power, extraction time, ratio of material to liquid and ultrasound wave on extraction rate of gingerol were investigated through single factor and orthogonal test.

以生姜粉为材料，通过单因素和正交试验探讨超声波－微波协同萃取姜辣素的工艺条件中溶剂种类、乙醇浓度、微波功率、微波处理时间、料液比及超声波等因素对萃取效果的影响。

The optimum extraction conditions for gingerol were identified as the follows: 70% ethanolas solvent, ratio of material to liquid as 1:12.5, synergistic extraction time 60s with ultrasound wave and microwave for one time.

最佳工艺条件：70%乙醇为溶剂；料液比1：12.5；超声波250 W微波协同处理60 s，姜辣素的提取率达到1.843%，处理后物料经70℃热回流提取2 h，姜辣素的提取率可达到3.262%，是直接热回流提取2 h的1.5倍。

The results indicated that the extraction system had a higher extraction velocity in the moment of globelet formation than that during the process of globelet ascending.

结果表明，液滴形成阶段的萃取速率远高于液滴上升阶段。

The diluent solution of glyoxylic acid and oxalic acid was used as the separation object.TOA (in n-octanol) was used as the solvent. The extraction characteristics of single acid and two-acid solution were studied,and the influence of pH and the concentration of complexing agent on the distribution coefficients were measured. The suitable mathematic models were proposed to describe the relationship between TOA and carboxylic acid based on assumed extraction reaction in organic phase.

摘 要：以草酸和乙醛酸的稀溶液为分离对象，采用三辛胺为萃取反应剂、正辛醇为稀释剂，研究了单溶质、双溶质有机酸的萃取分离特性，测定了溶液pH值、萃取反应剂的浓度等因素对双溶质有机酸萃取的影响，提出了萃取的化学反应发生在有机相中的假定，建立了TOA萃取草酸的数学模型。

The diluent solution of glyoxylic acid and oxalic acid was used as the separation object. TOA (in n-octanol) was used as the solvent. The extraction characteristics of single acid and two-acid solution were studied, and the influence of pH arid the concentration of complexing agent on the distribution coefficients were measured. The suitable mathematic models were proposed to describe the relationship between TOA and carboxylic acid based on assumed extraction reaction in organic phase.

以草酸和乙醛酸的稀溶液为分离对象，采用三辛胺为萃取反应剂、正辛醇为稀释剂，研究了单溶质、双溶质有机酸的萃取分离特性，测定了溶液pH值、萃取反应剂的浓度等因素对双溶质有机酸萃取的影响，提出了萃取的化学反应发生在有机相中的假定，建立了TOA萃取草酸的数学模型。

ConclusionMicrowave extraction has the highest yield in the shortest time. But volatile oil in Heracleum hemsleyanum Diels extracted by supercritical CO2 extraction or steam distillation has better quality.

结论微波萃取挥发油得率最高，时间最短；超临界CO2和水蒸馏法萃取挥发油的质量最好，因此使用超临界CO2是萃取牛尾独活挥发油的最佳途径。

This paper introduces a method of accurate information extraction based on Heritrix according to the shortage of Web information extraction technology.

针对现阶段Web信息抽取技术的不足，提出一种基于Heritrix的精确抽取方法，由三个分别独立的功能模块共同完成。

Confirm the optimum extraction technics of polyphenol of Humulus lupulus by single factor and orthogonal test: impregnant's concentration 70%, the ratio of materiel and impregnant 1:25, circumfluence temperature 45℃, time 1h and extraction quantity achieve 47.29mg/g dry Humulus lupulus at this condition.

通过单因素和正交试验确定了酒花多酚的最佳提取工艺：浸提剂为70%丙酮，料液比1：25，回流提取温度45℃，提取时间为1h，在此条件下多酚的提取量达到47.29mg/g干酒花。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐