cholestene-(4)-diyl-(3β.6β)-dibenzoate | 362594-55-6

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: cholestene-(4)-diyl-(3β.6β)-dibenzoate
• 英文别名: Cholesten-(4)-diyl-(3β.6β)-dibenzoat
• CAS: 362594-55-6
• 化学式: C₄₁H₅₄O₄
• 分子量: 610.877
• InChiKey: ZXGHSYDWUIRJBG-MQOKRHBGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  10.09
• 重原子数：
  45.0
• 可旋转键数：
  9.0
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.61
• 拓扑面积：
  52.6
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  cholestene-(4)-diyl-(3β.6β)-dibenzoate 在 间氯过氧苯甲酸 作用下， 以 二氯甲烷 为溶剂， 反应 96.0h， 以75%的产率得到
  参考文献：
  名称：

  甾体骨架中双脂环族醇的立体控制环氧化的研究：从cholest-4-en-3β，6β-制备八种非对映体纯的环氧化物；-3β，6α-; -3α，6β-和-3α，6α-二醇

  摘要：

  从cholest-4-en-3β，6β制备了八种非对映体纯的环氧化物；-3β，6α-; -3α，6β-和-3α，6α-二醇通过空间，保护基和氧化剂的组合作用对甾体骨架内双脂环式醇系统的立体控制的环氧化作用。

  DOI：

  10.1016/s0957-4166(01)00174-4
• 作为产物：
  描述：

  5α,6β-dibromocholestan-3β-ol 在 吡啶 、 sodium acetate 作用下， 生成 cholestene-(4)-diyl-(3β.6β)-dibenzoate
  参考文献：
  名称：

  79.二氧化硒对固醇和胆汁酸的作用。第三部分 胆固醇

  摘要：

  DOI：

  10.1039/jr9370000377

文献信息

• Does nationality matter? Western and Japanese multinational corporations in Southeast Asia
  作者：Jochen Legewie、Hendrik Meyer-Ohle

  DOI：10.1017/s106279870000510x

  日期：2000.10

  Multinational corporations from Japan and Western countries have played an active role in the economic development of Southeast Asia and have, during this time, undergone several developments. The recent economic crisis and efforts by the countries of the region to promote economic integration have again forced corporations to reconsider their strategies. Based on an historical overview, this article examines current strategies and, in particular, addresses the driving forces that are underlying the corporate behaviour of companies from different home countries. It argues that while corporate nationality has, to some extent, been important in the past, it will lose significance as multinational corporations are increasingly developing organizational cultures of their own.

  来自日本和西方国家的跨国公司在东南亚的经济发展中发挥了积极作用，并在此期间经历了多次发展。最近的经济危机和该地区各国促进经济一体化的努力再次迫使企业重新考虑其战略。本文在回顾历史的基础上，探讨了当前的战略，特别是来自不同母国的公司行为背后的驱动力。文章认为，虽然在某种程度上，公司国籍在过去一直很重要，但随着跨国公司越来越多地发展自己的组织文化，它将失去意义。
• Characterization of Fine Particulate Matter Produced by Combustion of Residual Fuel Oil
  作者：Gerald P. Huffman、Frank E. Huggins、Naresh Shah、Robert Huggins、William P. Linak、C. Andrew Miller、Ronald J. Pugmire、Henk L.C. Meuzelaar、Mohindar S. Seehra、A. Manivannan

  DOI：10.1080/10473289.2000.10464157

  日期：2000.7

  the S spectra established that the dominant molecular forms of S present were sulfate (26-84% of total S) and thiophene (13-39% of total S). Sulfate was greater in the PM2.5 samples than in the PM2.5+ samples. Inorganic sulfides and elemental sulfur were present in lower percentages. The Ni XANES spectra from all of the samples agreed fairly well with that of NiSO4, while most of the V spectra closely

  在732千瓦的锅炉中对四种不同的残留燃油进行了燃烧实验。通过旋风分离器将空气中的PM排放物样品空气分离成标称直径小于和大于2.5微米的馏分。但是，通过计算机控制的扫描电子显微镜（CCSEM）检查了几个样品，发现PM2.5部分的一部分由碳质空心球和直径最大为10微米的囊泡颗粒组成。在S，V，Ni，Fe，Cu，Zn和As K边缘以及Pb L边缘获得X射线吸收精细结构（XAFS）光谱数据。对S光谱的X射线吸收近边缘结构（XANES）区域进行反卷积，可以确定S的主要分子形式是硫酸盐（占总S的26-84％）和噻吩（占总S的13-39％）。PM2.5样品中的硫酸盐含量大于PM2.5 +样品中的硫酸盐含量。无机硫化物和元素硫的含量较低。所有样品的Ni XANES光谱与NiSO4的光谱非常吻合，而大多数V光谱与硫酸氧钒（VO.SO4.xH2O）的光谱非常相似。研究的其他金属（例如，Fe，Cu，Zn和Pb）也主要以硫酸盐形式存在。砷以砷（As
• Socioeconomic inequalities in the health of children and adolescents. A comparative study of the five Nordic countries
  作者：M Halldorsson

  DOI：10.1093/eurpub/10.4.281

  日期：2000.12.1

  Background: Socioeconomic differences in health among adults exist in the Nordic countries as well as in all other countries where this has been examined. The present study examines whether such differences can also be found among children and adolescents, whether these differences vary between the Nordic countries and whether they can be found in all age groups of children and adolescents. Methods: Questionnaires on health, well-being and socioeconomic status (SES) were sent to parents of a random sample of children aged 2–17 years, equally distributed between Denmark, Finland, Iceland, Norway and Sweden. The indicators of reported ill health were having one or more chronic diseases, frequent moderate or severe symptoms and short stature. The socioeconomic variables were education and occupation of both parents and disposable family income. Logistic regression analysis was used to measure the association between health and SES. Results: Parents in lower socioeconomic groups in all countries reported more ill health for their children at all ages and their children more often belonged to the lowest decile in reported height. Sweden and Denmark on the whole showed larger inequalities than the other three countries, but the difference between countries was small and varied according to the indicators of ill health used. The size of the reported health inequalities did not vary with age: the differences were as marked among adolescents as among younger children. Conclusions: Substantial inequalities in health according to SES can be found in childhood and adolescence, even in well-developed welfare states.

  背景：北欧国家以及所有其他对此进行研究的国家都存在成年人健康方面的社会经济差异。本研究探讨了这种差异是否也存在于儿童和青少年中，这些差异在北欧国家之间是否存在差异，以及这些差异是否存在于所有年龄段的儿童和青少年中。方法：向 2-17 岁儿童的随机样本的父母发送有关健康、福祉和社会经济地位 (SES) 的调查问卷，这些调查问卷均匀分布在丹麦、芬兰、冰岛、挪威和瑞典。报告的健康状况不佳的指标是患有一种或多种慢性疾病、频繁出现中度或重度症状以及身材矮小。社会经济变量是父母双方的教育和职业以及可支配家庭收入。逻辑回归分析用于衡量健康与社会经济地位之间的关联。结果：所有国家中社会经济地位较低群体的父母都报告说，他们的孩子在各个年龄段的健康状况都更差，而且他们的孩子往往属于报告身高最低的十分之一。总体而言，瑞典和丹麦比其他三个国家表现出更大的不平等，但国家之间的差异很小，并且根据所使用的不良健康指标而有所不同。所报告的健康不平等的程度并不随年龄的变化而变化：这种差异在青少年中与年幼的儿童中一样明显。结论：根据社会经济地位，即使在发达的福利国家，在儿童和青少年时期也可以发现健康方面的严重不平等。