主要产物

Limonoids, mainly found in the Rutaceae and Meliaceae families,are a group of chemically related triterpene substances and derivatives of secondary metabolism of plants.

柠檬苦素类似物主要存在于芸香科和楝科植物中，是一类三萜类的物质，是植物次生代谢产物之一。

Saturated fatty acids and high content steroids were found in the extracts of methanolysis products.

在盐酸甲醇解产物中，主要检测到系列饱和脂肪酸和高含量的甾醇成分。

But ferrous sulfate the by-product of TiO2 cannot be effectively used enough in our country over a long period. In order to solve above questions, the dissertation has done some works as follows:Firstly, the process of purifying by-product of TiO2-ferrous sulfate is studied. The craft and condition of the synthesis of micaceous iron oxide with by-product of TiO2-ferrous sulfate was studied through experiments.

它们都可以通过钛白副产硫酸亚铁为原料制备，但是长期以来，我国硫酸法生产钛白的副产物硫酸亚铁得不到充分有效地利用，针对以上情况，本论文主要作了以下几个方面的工作：首先，研究了钛白副产硫酸亚铁的净化工艺路线，讨论了钛白副产硫酸亚铁水热法合成云母氧化铁的工艺路线和条件，讨论了影响云母氧化铁生成的因素，得出了红、棕、灰云母氧化铁合成的控制条件。

Form、structure、characterization and function of prokaryotic、eukaryotic and molecular organisms;②nutrition and cultivation techniques of microorganisms;③physiological and metabolizable production of microorganisms;③theory of genetic variation and microbic breeding technique of microorganisms;⑤ecology and environmental protection of microorganisms;⑥Infection、 Immunity and biologics of microorganisms;⑦classification and identification of microorganisms and the international Code of Nomenclature of microorganisms.and microbial high-techs developing on these as the fundament of life sciences.

主要讲授：①原核微生物、真核微生物及分子生物的形态、结构、特点和功能；②微生物的营养和培养技术；③微生物生理及代谢产物；④微生物遗传变异理论和育种技术；⑤微生物生态和环境保护；⑥微生物传染、免疫和生物制品；⑦微生物分类鉴定和国际命名法则，以及在此基础理论上发展起来的微生物高新技术，是当代生命科学研究的基础。

Photochemical reduction of UO2(NO3)2 and production of HNO2 in 30% TBP-kerosene solution are investigated using an argon ion laser with 488 nm monochromic beam, and the effects of some, factors on quantum yield have also been studied.

用Ar~+激光器的488nm单色光研究了UO_2(NO_3)_2-30％TBP-煤油体系中U的光化学行为。实验表明：光照后TBP有机相内含有还原生成的U和TBP的主要降解产物DBP和丁醛；生成U的量子产额与酸度、温度、TBP浓度有关。

Indicate the principal mononitration product from each of the following compound.

答：下列化合物中主要生成一硝化产物位置。

The optimum reaction conditions were: at present of acetic anhydride, a stoichiometric quantity of nitric acid, at room temperature for 40 minutes. Nitration of chlorobenzene gave a,50% yield of mononitro compounds, and an ortho-para isomer ratio 0.20 in product distribution of chlorobenzene mononitration.

结果表明：硅钨酸催化性能较好，催化剂载体以纳米二氧化硅最好，反应条件中醋酸酐用量是主要影响因素；SiW_(12)O_(40)~(4-)／纳米SiO_2催化剂具有强对位选择性：在醋酸酐存在下，氯苯与等当量的硝酸室温下反应40分钟，氯苯一硝化产物中邻／对硝基氯苯异构体的质量比达0.2，产率可达50％。

3Rhe distribution and change of proliferating cell nuclear antigen in seminiferous tubule: The positive staining of proliferating cell nuclear antigen was found in slices of all groups, the immunological positive products were located at karyon, usually in brown yellow granules, only a small part of them in diffuse state; the immunological positive cells were mainly the spermospores, besides a small quantity were spermiocyte, supporting the cell and myoid cell nuclear to be stained.

3增殖细胞核抗原在生精小管中的分布及变化：各组切片均可见增殖细胞核抗原阳性染色，免疫阳性产物位于细胞核，通常呈棕黄色颗粒，小部分呈弥散状；免疫阳性细胞主要是精原细胞，另外还有少量初级精母细胞、支持细胞和肌样细胞核着色。

In myometrium layer,the VIP immunoreactive products mainly located in VIP immunoreactive nerve fibers.

在肌层中，VIP 免疫阳性产物主要位于VIP 样阳性神经纤维中。

Myxobacteria are fascinating and unique bacteria with uncommon morphogenetic behavior and extraordinary capacity to produce biological secondary metabolites with various mechanisms.

粘细菌具有独特的形态发生行为和产生活性次级代谢物的杰出能力，其许多次级代谢产物主要表现较强的抗真菌活性，而且作用机制新颖多样。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。