化学的

To observe the expression of Bcl-2 and Bax in rat normal and inflammatory dental pulp in situ, and to explore the impact of Bcl-2 and Bax on pulpitis.

利用 SD大鼠的下颌第一磨牙采用内毒素化学诱导法建立牙髓炎模型，用免疫组织化学染色的方法研究Bcl-2和Bax的表达及其意义。

Using a downward penedon test device, an -rotal study on improving the humidifying penetration ability of the water glass grout when mixed with three surfactants of dodecyl aloohol, sodium dodecyl sulfonate,dodecyl bezene sulfonic acid sodium salf has been performed.

1引言水玻璃浆材由于其无毒、价廉、可灌性好等优点，一直是岩土工程灌浆加固中首选的化学材，占目前使用的化学浆液的叨见以上［'］。

The present paper mostly concerned was the T. piniperda which was discovered in Yunnan Province, the research advances on Pinus yunnanensis volatiles and using the volatiles to trap T. yunnanensis were reviewed, the successful experiences of using plant volatiles to monitor and control Scolytidae was briefly summarized.

针对云南纵坑切梢小蠹，综述了云南松挥发性化学成分的研究现状及利用各种挥发性成分诱集云南纵坑切梢小蠹的研究进展，同时简要介绍了国内外其他地区利用植物挥发性化学物质监测和防治小蠹类害虫的成功经验。

This article makes a study of the effects of six different solvents on lacquer wax extraction of the Japanese Rhus succedanea,concerning the rate of extraction,the albedo value,melting point and chemical characteristics.

研究6种不同溶剂对日本野漆蜡的萃取率、白度值、熔点和化学特征值的影响。结果表明，溶剂种类对日本野漆蜡萃取率和白度值具显著性影响，但对熔点和化学特征值影响较小。试验得出石油醚(30~60℃)是漆蜡萃取的最佳溶剂，浸提温度低，时间短，漆蜡萃取率高，产品白度值高、色泽好，操作过程安全

Thestercoselectivity of the reaction of propargylide was different completely from that of the reactionof telluronium 3-trimethylsilylalltide with α,β-unsaturaled ketones and trans-trimethysilylacetylenyl-l-benzoyleyelopropane derivatives were obtained.

发现这一反应的立体化学与同样条件下含硅烯丙基碲叶立德和α，β-不饱和酮反应的立体化学完全不同，得到的是又式-2-三甲基硅基乙炔基-1-酮基环丙烷衍生物。

Some problems relating to chemical characters of transuranium elements, pretreatment of samples,methods of separation and purification,selection of chemical yield tracer,and various measurement technique are discussed.

有关超铀元素的化学特性、样品的前处理、分离和提纯方法、化学产额示踪剂的选择以及各种测量技术等一些问题也进行了讨论。

Although it is certain that the flower of Trollius chinensis is a good antibacterial medicine, there are no studies on its effective substances and quality standard.The 60% ethanol elution through polymide was determined as antibacterial and antivirus portion according to pharmacological study. The chemical experiment isolated 18 compounds and identified 13 structures.

本课题通过对金莲花提取物的药效学试验，确立了聚酰胺60%乙醇洗脱部位为其抗菌、抗病毒有效部位；继而对该部位进行了化学研究，分离出单体化合物18个，鉴定化学结构13个，其中有7个是从金莲花中首次发现的新化合物，有4个是从金莲花属植物首次分离得到，所分离的化合物大部分是黄酮类，还有有机酸等。

In addition,during the investigation of cadmium different levels distribution in Typha angustifolia Linn,we find that:l as far as the accumulate ability of different organ in Typha angustifolia Linn are concerned,root sheath leaf.

此外对狭叶香蒲体内镉的化学形态分析表明根和叶中均以氯化钠提取态最高，但在根中以去离子水和乙醇提取态存在的镉含量总和大于氯化钠提取态，表明镉在根与叶的化学存在形态有所不同。

The reasons of recognition disability include unproper study methods,short of fixed knowledge points,abstract and difficult chemistry knoledge,as well as the specific features of the chemistry subject.

引起认知障碍的原因分为：学习方式不当、缺乏相应的固定点知识、化学知识抽象难懂、以及化学学科自身的特点四种。

The bacteria's genes were all constructed in the laboratory "from four bottles of chemicals on a chemical synthesiser, starting with information on a computer," he said.

他表示，这一人造细菌的基因均在实验室内构建，&从电脑上的信息开始，使用四瓶化学物质和一台化学合成装置来构建的。&

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。