化学合成

Determination of Tyrosine in Urine Spectrophotometric Method;2. For chemical pre-extraction, MSTFA/TMSL derivatization reaction, GC/MS analysis, it is confirmed that two main metabolites (19-no-randrosterone and 19-noretiocholanolone) were found in nandrolone urine.

本文对合成的19-去甲雄烷醇酮的四个差向异构体混合物进行气相色谱分离，对诺龙和炔诺酮用药后，留取的人尿样通过化学预处理，MSTFA/TMSI衍生化反应，GC/MS分析，确证了尿样中诺龙的两个主要代谢产物为19-去甲雄酮和19-去甲原胆烷醇酮，炔诺酮的两个主要代谢物是四氢炔诺酮的两个形式，可能是3α-OH-5α-THINE和3α-OH-5β-THINE，在炔诺酮代谢前期，还发现有诺龙的上述两个代谢物存在。

Today, the drug can be obtained through a semi-synthetic process from its precursors, including 10-deacetylbaccatin III, baccatin III and so on, which can be separated from yew tree.

现在紫杉醇以及它的抗癌同源衍生物可以通过其前体进行化学半合成制得。

We regard horsetail pine weight turpentine as materail, because the chemistry characteristic of its constitutions is different,they can be effectively separated,and synthesize the series perfumes product, Such asω- AML,ω- HML,isolongifolene,β-carypophyllene alcohol,cyclo-oxy-carypophyllene,α-santaleneol.

本文以马尾松重质松节油为原料，利用其组分各自的化学特性不同，对其进行了有效分离，在分离的同时合成系列香料产品，主要有：ω-乙酰氧甲基长叶烯、ω-羟甲基长叶烯、异长叶烯、甲酸长叶酯、β-石竹烯醇、环氧石竹烯、a-檀香烯醇等。

Second,we set the database of morphological characteristics of intercepted and captured bark beetle during quarantine,and the last,we studied the molecular identification of 15 species.The results were showed as below.1.Application of bark beetle semiochemicals in timber quarantine1.1 EAG and walking responses of bark beetle to different semiochemicalsSemiochemicals which can induce the olfactory response and aggregation behavior of bark beetle include host volatile components,pheromones secreted by bark beetles itself or synthesized with host compounds by bark beetles,and the compounds released by tissue of decaying wood under the pressure of microorganism after bark beetle colonization.

信息化合物在小蠹虫检疫中的应用1.1小蠹虫对各种信息化合物的触角电位及嗅觉反应能诱发小蠹虫产生嗅觉反应，进而使之产生聚集行为的信息化合物有很多种，主要包括：树木的挥发性组分；小蠹虫自身产生的信息素和寄生后转化寄主化学物质合成的信息素统称虫体信息素以及树木被小蠹虫寄生后，其组织在微生物作用下释放的物质。

The wet-chemical preparation of barium titanate nanocomposites surface-coated with stearate was described.

通过湿化学法合成了表面包覆硬脂酸的钛酸钡纳米复合微粒。

It is: controls to compose nanometer metal silver grain with different size and different shape by processing; uses chemical combination technology to fixing the nanometer metal grain on the different underlay surface, in order to get the nanometer anti-bacterium coating, which can achieve the control of equipment and the micro-biomembrane of packaging inner surface.

通过过程控制合成了不同粒度不同形貌的纳米金属银颗粒。并采用化学结合技术将纳米金属颗粒固着在不同的衬底表面，获得固着性、长效作用的纳米抗菌涂层，实现了食品生产设备和包装内表面微生物膜的控制。

The company has first-class rubber production technology, clever use of rubber of the special performance, in accordance with customer needs, develop the design and manufacture of silicon, fluoride, ethylene propylene diene monomer and other special properties (high temperature, low temperature, electrical insulation, corrosion resistant chemical mediator, conductive, flame retardant, oil, etc.) all kinds of rubber products, but also the production of sponge rubber products (silicone sponge, other natural synthetic rubber sponge), product quality and tolerance of the appearance of the inspection of all sizes the production implementation of national standards for excellence Ministry of Chemical Industry corporate culture, enhance the competitiveness of my company.

本公司拥有一流的橡胶生产技术，巧妙地运用橡胶所具有的特殊性能，可根据客户需要，开发设计和生产硅、氟、三元乙丙等各种特殊性能（耐高温、低温、电绝缘、耐化学介质腐蚀、导电、阻燃、耐油等）各种橡胶制品，还生产海绵橡胶制品（硅胶海绵、其他天然合成胶海绵），产品外观质量及公差尺寸生产检验全部执行化工部国家标准优秀的企业文化，提高了我公司竞争力。

Pakistan-American biochemists Khorana has spent the beginning of the chemical synthesis of 64 kinds of possible methods of genetic code, and test their activity.

巴基斯坦裔美国生物化学家霍拉纳开始已用化学的方法合成64种可能的遗传密码，并测试它们的活性。

Advances in Research on Plants Reactions under Phosphate Starvation;2. Topics discussed in this article includes synthesis and structures of R2M24, the reactions of its metal-metal triple bond with various reagents such as nucleophiles, carbon-carbon mu.

本文对一类重要的ⅥB族金属叁键化合物R_2M_2_4(R为环戊二烯基及类环戊二烯基)近年来的研究成果进行了综述，综述重点是这类化合物的官能团M≡M参键的化学活性，全文包括R_2M_2_4的合成及结构，M≡M叁键与亲核试剂、与碳-碳重键，与氧或与金属羰基物等试剂的反应及其应用。

Topics discussed in this article includes synthesis and structures of R2M24, the reactions of its metal-metal triple bond with various reagents such as nucleophiles, carbon-carbon mu.

本文对一类重要的ⅥB族金属叁键化合物R_2M_2_4(R为环戊二烯基及类环戊二烯基)近年来的研究成果进行了综述，综述重点是这类化合物的官能团M≡M参键的化学活性，全文包括R_2M_2_4的合成及结构，M≡M叁键与亲核试剂、与碳-碳重键，与氧或与金属羰基物等试剂的反应及其应用。

This paper discusses design and realizable methods of remote test output interface from logical design angle.

本文从逻辑设计的角度讨论遥测输出接口的设计及实现方法。

This also 星体投射plies to buildings, structures and geological features.

这也适用于建筑物和地质特征。