甾体

ZY3 was the first bacterial strain took MHE as sole carbon and energy resources in China. It was explained for the characteristics of strain ZY3 degradating MHE in theory. In a word, this study was expected to be bestead for treating with the pollution of sex steroid hormones of China.

ZY3 菌株是国内首次分离出的一株以MHE 为唯一碳源、能源的高效降解菌，通过本实验，阐明微生物降解甾体雌激素的特性，在应用上提供优良菌种，希望能对我国的甾体雌激素废水治理有所裨益。

The ultraviolet spectrophotometry method as determining the content ofsapogenins was used to evaluate the change of the quality in Dioscorea Zingiberensis C.H. Wright before or after supercritical CO_2 fluid extraction. The content of sapogeninswas 2.03% and 1.84% respectively in original and depurative sample, which showed thatdepuration of Cu, Cd, Pb in Dioscorea Zingiberensis C. H. Wright by supercritical CO_2fluid extraction had little influence on the active ingredient.

2采用超临界CO_2流体萃取法提取黄姜中甾体皂素，以可见分光光度法测定其含量，得到黄姜原样品及重金属净化后样品中甾体皂素含量分别为2.03％和1.84％，超临界CO_2流体络合萃取黄姜中Cu、Cd、Pb后对其有效成分影响不大。

In the frist part, it was simply summarized that the application of microbial transformation and the two important reactions:side chain cleavage and hydroxylation of steroid respectively.

第一部分，首先对微生物转化技术的应用和两个重要的甾体转化反应-甾体边链降解反应和甾体羟基化反应进行了简要综述。

In this paper, the structure characters of steroidal alkaloids from Buxaceae were discussed. Using the steroidal alkaloids for the chemotaxonomic characters, the evidences of chemotaxonomy and plant systematics of Buxaceae were studied. The interrelations among three genera, Buxus, Pachysandra, and Sarcococca were discussed.

本文讨论了黄杨科植物甾体生物碱成分的结构特征；以甾体生物碱作为化学分类学的特征物质，初步探讨了黄杨科植物化学分类学的依据和系统位置；同时讨论了黄杨属、板凳果属（Pachysandra，又称富贵草属）和野扇花属3属间的相互关系。

Under the conditions of acidity and dehydration, the abnormal Beckmann rearrangement usually occurs in α-electrofugally substituted cyclic ketoximes and gives a ring opened alkene-nitrile compound.

一。非正常Beckmann重排反应在甾体-17-酮肟中的应用对甾体18-甲基修饰是制备生物学重要的18-去甲基甾体的有效方法之一。

The sugar chains are usually trisaccharide or tetrasaccharide, and the aglycones are classified into three groups, i.e., solanidane, spirosolane, and other steroidal derivatives.

糖苷生物碱是主要分布于茄科和百合科植物中的糖苷类次级代谢产物，糖链通常由3或4个单糖组成，苷元通常为三类甾体生物碱：茄次碱烷、螺旋甾碱烷和其他甾体衍生物。

Compounds, including 15 new C21 steroids, were isolated from the alcohol abstracts of the ratten of Marsdenia tenacissima. 37 of them are C21 steriods and their glycosides, the rest 5 compounds are lignans.

从通光散藤茎的乙醇提取物中，共分离得到42个化合物，其中包括C21甾体及其甾体皂甙类化合物37个，木脂体类化合物5个，有15个新化合物，均为C21甾体类化合物。

Androstenedione and dehydroepiandrosterone as a new steroid material attracts people's attention because of the shortage of diosgenin resource and successful synthesis of AD by degradation of sterols. The followings were included in this thesis: 1. 24 new oxime-ether and oxime-ester compounds from AD were synthesized by cleavage of A-ring through NaIO_4/KMnO_4 oxidation, ring closure by amination, oximation with hydroxylaminechloride in C-17 position.

甾体药物的合成原料一般为薯蓣皂素、剑麻皂素、番麻皂素等，随着薯蓣资源日渐枯竭，使得甾体药物工业不得不寻求新的原料，而微生物降解胆固醇和植物甾醇合成雄烯二酮获得成功，使得AD成为新兴的甾体原料吸引了人们的注意。

The contents of mineral elements, like Fe, in LMTCMs were higher than that of nor-LMTCM. The result of analysis of mineral element of 14 LMTCMs by ICP-MS method also showed the content of Fe have something to do with lung meridian tropism effects. The result of the study of platycodon radix approved the laws too. These laws were used to predict if the marine medicines have the lung meridian tropism effects.2. The Compatibility laws of Medicines and their chemical composition in LSP were studied by mining the data of the constituent herbs and their chemical composition. The results showed that the most constituent medicines of lung system prescriptions have lung meridian tropism. Radix glycyrrhizae, herba ephedrae, semen armeniacae amarum, fructus schisandrae Chinese and their compatibility are common in lung system prescriptions. Terpene, alkaloid, steroid, and flavanoid compounds and their compatibility are common in lung system prescriptions.3. The marine phycophyta medicines of LSP were studied by the same method.

对比归肺经中药及肺系方剂主要化学成分构成，萜类、生物碱、甾体类成分可能是归肺经中药及肺系方剂的主要药效成分；结合君臣佐使药的化学成分构成特点及肺系方剂组成中药的归经构成情况，肺系方剂组方设计应该考虑以下几个方面：一、优先考虑归肺经中药，在应用不归肺经中药时要配伍归肺经中药；二、组方时应考虑含萜类、甾体及生物碱类化合物的中药；治疗肺咳病及咳嗽症状时可以考虑含萜类化合物的中药，治疗气喘症状时可以考虑含生物碱类化合物的中药；三、在确定组方中药或化学成分配伍关系时，君药多考虑含生物碱、黄酮类化合物的中药；臣药、佐药可以考虑含萜类及甾体类化合物中药；使药可以考虑含萜类、甾体类及黄酮类化合物的中药。

To obtained useful chiral multi-substituted alkene-nitrile intermediates, the abnormal Beckmann rearrangement and their applications to the synthesis of the natural products were studied.

用甾体-17-酮肟的非正常Beckmann重排反应生成的相应的烯-腈化合物是合成18-去甲基甾体的重要中间体。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。