- 更多网络例句与胆甾烷相关的网络例句 [注：此内容来源于网络，仅供参考]
-
Whenpyridine was used as reductive decomposing agent, the expecting cholest-4-en-3,6-dione-22-al was obtained. However, when Zn/HOAc was used to decomposethe ozonide, C-4,5 double bond was further reduced to give cholest-3,6-dione-22-al as main product. 2 For the side-chain construction of compound (1), the solid-liquid phase-transfer Wittig reaction was used. When (3-methyl-2-oxobutyl)-triphenylarsonium bromide was used as reagent, the reaction can be carried out inmild reaction condition and the yield is higher than that when phosphorane wasused.
但使用Zn／HOAc作为分解剂时，却得到其氢化产物胆甾-3， 6-二酮-22-醛；2在甾体支链引入过程中，采用固-液相转移Wittig反应的方法，用(3-甲基)-2-氧丁基三苯基溴化胂作为试剂，反应在非常温和的条件下便可完成，而且产率比传统采用膦烷的方法更高；3在对某些甾酮化合物的选择性还原反应研究时，发现在〓还原体系中，当加入某些金属离子后，反应有更好的区域选择性和立体选择性。
-
Three days after inoculation, 67.13% grape phylloxera selected 'Kyoho', while only 15.29% and 17.58% phylloxera selected '5BB' and '140Ru', respectively.
对砧木5BB和巨峰根系的挥发性组分进行测定，发现2个品种挥发物独有组分数量均较高，巨峰独有组分为23个，占总成分数的48.94%，5BB的独有组分为32个，占总成分数的57.14%。5BB和巨峰的共有组分为24个，主要成分均为亚油酸甲酯和反油酸甲酯，但含量有所不同，其中，5BB以倍半萜类的丁香醇及脂肪酸甲酯类的亚油酸甲酯，反油酸甲酯，棕榈油酸甲酯含量较高，高于巨峰中相应物质含量的4.23%~6.46%，而巨峰以邻苯二甲酸二丁酯及胆甾烷含量较高，分别高于5BB相应组分含量的6.81%和1.07%。
-
Two pathways of cleavage and conversion in ring B of ergostane and cholestane are summarized.
第二部分总结了麦角甾烷及胆甾烷B环裂解和转化的两种途径。
-
The results showed that the copolysiloxanes behaved liquid crystal phase in a certain range of cholesteryl content.
结果表明：这类共聚硅氧烷在一定的胆甾基含量范围呈现液晶相，由于长链烷酯基的引入，液晶相转变温度降低。
-
We use this technology to measure some rock and oil sample taken from Liaohe or Tarim basin. We identified many series of biomarker with dividing-era significance. These series are C26 steranes, C30 methylsteranes; and methly hopanoid alkanes, hexacyclic hopanoid alkanes, which two series were measured first by our laboratory in China.
本论文建立地球化学样品GOMS／MS分析方法；并对辽河盆地和塔里木盆地岩石及原油样品进行GC／MS／MS分析，鉴定出多个系列具有划时代意义的生标组分，这些组分是用GC／MS技术无法检测的极微量的生标组分：C26降胆甾烷系列、C30甲基甾烷系列等：还有高碳数甲基藿烷系列和六环藿烷系列见图1，图2，在国内被我们实验室首次检出。
-
By means of GC-MS-Ms method, the multiple series of age-related and taxon specific biomarkers are tested in source rocks and oil samples from Liaohe oilfield and Tarim basin, which are hard to be detected by conventional GC-MS method. They are steranes, methylsteranes, Tricyclic and tetracyclic diterpanes, methyl hopanoid alkanes and hexacyclic hopanoid alkanes, etc.
利用色谱－质普－质普方法在辽河与塔里木盆地源岩和原油样品中，检测出了多个系列时代相关及特定种属生物标志物，包括：降胆甾烷系列、甲基甾烷及甲藻甾烷系列、三环二萜烷及四环二萜烷系列、六环蒮烷及甲基藿烷系列等等，这些化合物很难用常规GC-MS形方法检测到。
-
Comparing with marine oils in the adjacent areas, all crude oils in Hade 4 oil field (except for HD401 well) have following peculiarity: very similar in the composition of light hydrocarbon fraction, and the distribution of of phytane-series isoprenoid alkanes, high concentration in steranes, terpanes and their aromatized compounds, as well as rearranged steranes; low concentration of gammacerane, 24-norcholestanes and 24-rearranged steranes, and low C〓 regular steranes C〓/(C〓+C〓+C〓＜20%; 3-methyl steranes and 27-norcholestane predominated, respectively; very low concentration of dinosterane and 4-methyl steroid.
分析表明，与相邻地区海相原油比较，除最南端的HD401井原油外，其它井区原油均具有下述特点：轻烃馏分组成十分接近、植烷系列类异戊烯烷烃分布较为一致、甾萜类和芳香甾萜类环状化合物浓度较高、重排甾烷丰度较高、伽马蜡烷含量低、规则甾烷组成中C〓丰度低C〓/(C〓+C〓+C〓＜20％、甲基甾烷中以3-甲基甾烷为主、甲藻甾烷和4-甲基甾烷丰度极低、降胆甾烷中以27-降胆甾烷为主、24-降胆甾烷和24-重排降胆甾烷丰度低。
- 更多网络解释与胆甾烷相关的网络解释 [注：此内容来源于网络，仅供参考]
-
allochlorophyll：类似叶绿素
allocarpy 杂交果 | allochlorophyll 类似叶绿素 | allocholestanone 别胆(甾烷)酮
-
allochromatic crystal：另色晶体
"allocholane","别胆甾烷" | "allochromatic crystal","另色晶体" | "allo-form","别式;另式"
-
cholestane：胆甾烷
释文:一组不对称异构多环环烷烃的总称,具有旋光性,包括有胆甾烷(cholestane)、麦角甾烷(ergostane)和谷甾烷(sitostane)等. 在沉积物和原油中已经找到许多甾烷(还有甾烯),显然是生物中的甾族(甾醇)化合物转化而来的.
-
cholestanol：胆甾烷醇
此外,还含有胆甾醇(cholesterol),胆甾烷醇(cholestanol),胆甾-4-烯-3-酮(cholest-4-ene-3-one),蛋白质,氨基酸,卵磷脂,脂肪,尿素等1.对中枢神经系统的作用:1.1麝香或麝香酮对中枢神经系统的作用,报道不完全一致,作用尚不清楚.