甾烷

通过C（27）/C（29）甾烷和有机碳同位素来判断早古生代和前寒武纪的烃源岩的生物来源

Biological origin of Early Palaeozoic and Precambrian hydrocarbon source rocks based on c_ ( 27 ) / c_ ( 29 ) sterane ratio and organic carbon isotope

4-甲基甾烷由4β（CH3）构型转化成4α（CH3）构型，在未成熟阶段是较好的成熟度参数，而且4-甲基甾烷不会随成熟度增加而转化成正常甾烷；

The alteration of 4-methyl sterane from a 4 β( CH_3 ) configuration to a 4a ( CH_3 ) is a better maturity parameter in the premature stage , and moreover , 4-methyl sterane will not alter to normal sterane as the degree of maturity becomes higher ;

珠江口盆地C（30）4-甲基甾烷的研究

Study on c_ ( 30 ) 4-methyl steranes of Pearl River Mouth Basin

规则甾烷的ααα20R构型向20S构型的转化，也随热模拟温度的升高逐渐增强。

The transformation of steranes from ααα 20R model to 20S model gradually intensify along with the rising of thermal simulation temperature .

南极湖泊现代沉积物生物标志物的分析对比：对南极燕窝湖近代沉积物样品利用超临界流体萃取与GC-MS离线分析了烷烃、藿烷、甾烷等生物标志物及系列特征未知化合物。

B. The biomarkers of modern lake sediments from Antarctica : We have analyzed some biomarkers , such as alkane , hopanes , steroids anda series of unidentified compounds with apparent m / z 94 by use of SFE and off-line GC-MS.

在供氧充足的通气状态下以5α-雄甾烷为唯一碳源时，C-14-1菌株对5α-雄甾烷的降解率达到77%。

Under aerobic condition , the degradation efficiency of 5 α - androstane reaches 77 % if used as the sole carbon source .

此外，本文还提出了用有机碳同位素来进一步区分C29甾烷优势生物来源的方法。

We also bring forward a new method to recognize the different biological source for C_ 29 sterane predominance using organic carbon isotope .

据研究，印度人参中的主要生理活性物质是睡茄内酯，它是一组具有C-28麦角甾烷骨架的甾体内酯。

According to the research , the primary biological activity component in Indian ginseng is withanolides . Withanolides are C-28 ergostane-type steroids possessing a steroid lactone .

甾烷C29／（C27＋C28＋C29）值为0.5左右，与海洋浮游生物来源的有机质生烃相区别。

The sterane ratio of C29 / C27 + C28 + C29 is about 0.5 , which differs from that of the hydrocarbons related to oceanic planktons .

大部分低熟油样品具有高Pr/Ph比值，低伽马蜡烷/C30藿烷比值及高C29甾烷含量的特征。

Most of the low-mature oil samples have high pristane / phytane ratio , low gammacerane / C_ ( 30 ) hopane ratio and high C_ ( 29 ) sterane content .

在早古生代与前寒武纪的石油与源岩中，经常出现令人困惑的C29甾烷优势，而在有机地球化学中C29甾烷优势被认为是陆相有机质输入的标志。

The predominance of C_ 29 sterane in early Paleozoic and Precambrian rocks and crude oils is puzzling , because the predominance of C_ 29 sterane is often taken as the result of high terrestrial plant input .

第二类原油，富含藻类物质（C27甾烷与C304α甲基甾烷含量较高），该类原油可能来自侏罗系的富藻湖相泥岩；

The second type of oil is characterized by high content of algal substance ( high content of C 27 and C 304 α - methylstrane ), and this kind of oil is possibly from the lacustrine mudstone with abundant algae .

原油及生油岩中甾烷和萜烷的质谱特征及鉴定

Identification of the Biomarks in the Crude Oil and Source Rock

GC&MS法测定植物甾醇样品中的谷甾烷醇

Determination of sitostanol in phytosterol samples by GC & MS

植物甾醇和植物甾烷醇：来源、安全性以及在保健食品中的应用

Phytosterols and Phytostanols : Sources , Safety and Applications in Functional Foods

沉积有机质中甾烷、4-甲基甾烷植物花粉来源的直接证据

Direct evidence of sterane and 4-methyl-sterane originating from plant pollens in organic deposit

A－失碳－5α－雄甾烷化合物的合成及抗生育活性

Synthesis and antifertility activity of a-nor-5 α - androstane

用模糊聚类分析对溢油指示物甾烷进行了研究。

Steranes as the indicators of spilled oils is studied with fuzzy clustering analysis .

沉积环境的氧化还原性对重排甾烷形成的作用

The Effect of Oxidation Reduction Nature of Depositional Environments on the Formation of Diasteranes

论4-甲基甾烷和孕甾烷的成因

On origin of 4-methyl steranes and pregnanes

镜质体反射率和甾烷与藿烷异构化程度在恢复盆地热史中的应用

Application of vitrinite reflectance , sterane and hopane isomer data to thermal history reconstruction of basins

植物甾醇的氢化&甾烷醇生产工艺的研究

Studies on Hydrogenation of Plant Sterol

天津地区表层土壤和河流沉积物中甾烷与五环三萜烷的分布特征及污染源分析

Distribution and sources of steranes and pentacyclic triterpanes in surface soils and bottom sediments from Tianjin

双烯醇酮醋酸酯的合成研究麝香和麝香注射剂中麝香酮和雄甾烷的含量测定

Studies on Synthesis of 16-Dehydropregnenolone Acetate QUANTITATIVE DETERMINATION OF CERTAIN COMPONENTS IN NATURAL MUSK AND ITS INJECTION

4α-甲基-5α-胆甾烷的合成及中间体立体化研究

Synthesis of 4 α - Methyl-5 α - cholestane and Studies on the Stereochemistry of Some Intermediates

最后解释了生物标志化合物胆甾烷的立体同分异构体不同深度丰度变化的原因。

Finally , the reason for stereo-isomer variation of cholestane in different depths and abundances are explained .

严重的生物降解作用可破坏原油的正常甾烷，并使正常藿烷向25-降藿烷转化。

Diasteranes and25-norhopanes survive heavy biodegradation and they can be used as source fingerprints for biodegraded crudes .

孕甾烷含量高；

High amounts of pregnanes ;

长城湾及其附近沉积物中甾烷和萜烷化合物

Sterane and hopane compounds in sediments from the Great Wall Bay and its adjacent area , Antarctica

根据萜烷、甾烷地球化学参数确定生油岩成熟门限的方法

Methods for determining maturation threshold depth of source rocks based on geochemical parameters of steranes and terpanes