查询词典 extraction

Objective: To study the anticonvulsive action of scorpion alcoholic extraction on phenytoin-resistant convulsive rats made by direct cortical electrical stimulation in order to investigate the mechanism of antagonizing drug-resistance of SAE.

中文摘要：目的：研究全蝎乙醇提取物(scorpion alcohol extraction，SAE)对电刺激大脑皮层点燃耐苯妥英钠大鼠惊厥模型的对抗作用，并探讨其抗耐药作用机制。

In this paper, the characteristics of supercritical fluid and principle of supercritical fluid extraction, gas anti-solvent, rapid expand supercritical solution were introduced. The development of supercritical fluid recystallization technology used in manipulating ultrafine explosives desired and SFE developed for demilitarization of energetic material and RESS technology used in coating of energetic material were reviewed.

摘 要：在阐述了超临界流体的性质和超临界萃取(Supercritical Fluid Extraction， SFE)、超临界流体溶液快速膨胀结晶（Rapid Expand Supercritical Solution， RESS）和气体反溶剂结晶（Gas Anti-solvent， GAS）过程原理的基础上，重点介绍了近年来超临界流体技术在含能材料细化，废弃炸药回收与利用，炸药包覆等方面所取得的研究进展。

Hereinafter referred to IBI ETL (Extraction, Transformation and Load) technologies intelligent reports in this system is based on the results of input from different perspectives for analysis, and then from Education Secretary to disciplines teachers can see through the foreground display of the entire school and the whole school district, and the examination results of the examination results information for multidimensional analysis of information.

基于Information Builders公司的ETL(撷取Extraction、转换Transformation与加载Load)技术的智能报表系统就是在此基础上对录入的成绩从不同的角度进行分析，然后从学科老师到教育局长都能通过前端展示看到整个学校乃至整个学区的考试成绩信息以及对考试成绩进行多维分析后的信息。

The dissertation focuses on the topics for automatic, accurate, and efficient metadata extraction from general and unstructured documents, on the basis of the state of the work on metadata extraction. After analyzing the limitations of current work, we propose a model for Automatic Document Metadata Extraction, and formulize the problem under the framework of statistical learning.

首先，论文针对目前元数据抽取在处理的文档对象和采用的抽取方法方面所存在的问题和不足，以统计学习理论和信息抽取领域相关研究为指导，结合非结构化文档的特点，提出了文档元数据自动抽取（Automatic Document Metadata Extraction，ADME）模型，给出其形式化描述，进而介绍模型工作机理和处理流程。

Cloud point extraction is related to the conventional liquid-liquid extraction. CPE based on the solubility and cloud point phenomenon of aqueous solutions of surfactants, upon alteration of the experimental conditions such as pH value of solution, ionic strength, temperature, and the solution is separated into phases, which results in the separation of hydrophobe and hydrophile.

浊点萃取(Cloud-Point Extraction， CPE)是近年出现的一种新兴的液-液萃取技术，它以表面活性剂胶束水溶液的溶解性和浊点现象为基础，通过改变实验参数，如溶液的pH值、离子强度、温度等引发相分离，从而将疏水性物质与亲水性物质分离。

OCPs residue of samples was determined by gas chromatography with electron capture detector after pretreated by Soxhlet extraction.

采用索氏提取方法(Soxhlet Extraction， SE)和气相色谱法，分析底质中有机氯农药的残留量。

The studies was proceeded on the the supercritical CO2 extraction technique of rotenone from Tephrosia vogelii. The extraction influences of technology conditions were systematically groped, The research results were listed as follows:1 The analysis method applied in this paper has been proved to be suitable to technology research of the studies on the SC-CO: extraction technique of rotenone from Tephrosia vogelii. 3 indexes, extraction ratio of rotenone. extraction ratio of total compounds and rotenone content percent in total compounds weight, were carried out with HPLC quantitatively determination combined with the sample weight loss after extraction. With these 3 indexes. The extraction influences of technology conditions were evaluated by synthesis. Then the best technology conditions were ascertained for different extraction aims.2 The pretreatment of rough material should be needed before extraction. Comminuting the material to 0.28mm size is most fit to SC-CO: extraction.3 Firstly static extracting 20 min then turn to dynamic doing is the better extraction mode than other ones.4 The orthogonal experiment was conduct with 3 factors and 5 levers.

本论文通过对非洲山毛豆SC-CO_2萃取中影响萃取效果的工艺条件的研究，初步得出如下结果：(1)本论文中所采用的萃取效果评价方法适宜于非洲山毛豆中鱼藤酮的超临界流体萃取技术研究，该方法具体为：HPLC定量分析非洲山毛豆SC-CO_2萃取物中的鱼藤酮含量，再结合萃取前后处理样品的重量损失，得出鱼藤酮萃取率、萃取所得粗物质萃取率和粗物质中鱼藤酮含量三个参数，以此三个指标综合评价萃取条件对萃取效果的影响；(2)通过对原料粒度对萃取效果影响的研究，结果表明SC-CO_2萃取非洲山毛豆复叶中的鱼藤酮，原料粉碎成30目粒度叶粉时萃取效果较好；(3)通过对萃取方式与萃取效果之间关系的研究，结果表明SC-CO_2萃取非洲山毛豆中鱼藤酮应采用先静态后动态的萃取方式，静态萃取时间为20min；(4)通过温度、压力和CO_2流量三因素五水平的正交试验，结果表明温度是最主要的影响因素，压力因素对鱼藤酮萃取率的影响程度高于CO_2流量，而对于粗物质萃取率和粗物质中鱼藤酮含量CO_2流量因素高于压力。

In order to simply the method, we further propose using magnetic stirring with weighted ring in stead of argon sparging; using air-circulated incubator in stead of water bath for better observation and sample collection; using centrifuging in stead of filtration for extract pretreatment; using one phase of simplified bioaccessibility extraction method instead of the two-phase method for a better estimate to the in-vivo method.

爲进一步简化试验方法，建议将开放式反应槽改为密闭式；使用可调速磁力搅拌及具载重环磁石，取代昂贵之氩气搅拌；将水浴温控改为气控式，以利试验观察与采样。此外，小肠相萃取不使用吸附剂，萃取液前处理利用高速离心取代压阻较高之过滤方式。本研究二阶段试验之生物有效性皆低估动物试验RBF，建议可将二阶段胃肠体外试验方法改为单相一阶段生物有效性萃取(simplified bioaccessibility extraction， SBET)试验方法。

Both methods are time- and solvent-consuming during the processing. In this study, headspace solid-phase dynamic extraction was applied to exame 13 organochlorine pesticides (γ-HCH、heptachlor、δ-HCH、aldrin、heptachlor epoxide、o,p'-DDE、α-endosulfan、p,p'-DDE、dieldrin、endrin、o,p'-DDT、β-endosulfan、p,p'-DDT) in water and soils. That was a rapid, solvent free and no clean-up procedures technology.

本研究以近年发展之顶空微针动态抽取技术(Headspace solid-phase dynamic extraction， HS-SPDE)进行水及土壤中十三种有机氯农药(γ-HCH、heptachlor、δ-HCH、aldrin、heptachlor epoxide、o，p'-DDE、α-endosulfan、p，p'-DDE、dieldrin、endrin、o，p'-DDT、β-endosulfan、p，p'-DDT)检测方法建立，此技术为一无需溶剂萃取，不需净化之快速检测方法。

Effects of different extraction modes, extraction time, pressure and temperature on the extraction yield of onion essential oil and sulphur concentration were investigated,and the different extraction solvents and extraction times were researched in liquid-liquid extraction procedure. The optimal conditions of extraction of onion essential oil with subcritical water were static extraction, 100~150℃sequential program temperature increasing extraction for 30min, 5MPa, petroleum ether as extraction solvent for two times.

考察了提取方式、提取时间、温度、压力对洋葱精油的提取得率及含硫化合物浓度的影响，并对液液萃取中溶剂的种类和萃取次数进行了研究，得到了洋葱精油的亚临界水提取最佳工艺：静态提取、提取时间30 min，压力5 MPa，100～150 ℃的连续程序升温，石油醚为萃取溶剂，萃取2次。

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