cholest-4-en-6β-yl-methyl ether | 4616-28-8

• 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: cholest-4-en-6β-yl-methyl ether
• 英文别名: cholest-4-en-6α-yl-methyl ether；Cholest-4-en-6α-yl-methyl-aether
• CAS: 4616-28-8
• 化学式: C₂₈H₄₈O
• 分子量: 400.689
• InChiKey: IDSRLQZHXJPKET-LLYUGZIISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.04
• 重原子数：
  29.0
• 可旋转键数：
  6.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.93
• 拓扑面积：
  9.23
• 氢给体数：
  0.0
• 氢受体数：
  1.0

反应信息

• 作为产物：
  描述：

  胆甾-4-烯-6-酮 在 lithium aluminium tetrahydride 、 乙醚 、 silver(l) oxide 作用下， 生成 cholest-4-en-6β-yl-methyl ether
  参考文献：
  名称：

  Evaluation of Time-Resolved PM_2.5 Data in Urban/Suburban Areas of New Jersey

  摘要：

  Time-resolved data is needed for public notification of unhealthful air quality and to develop an understanding of atmospheric chemistry, including insights important to control strategies. In this research, continuous fine particulate matter (PM) mass concentrations were measured with tapered element oscillating microbalances (TEOMs) across New Jersey from July 1997 to June 1998. Data features indicating the influence of local sources and long-distance transport are examined, as well, as differences between 1-hr maxima and 24-hr average concentrations that might be relevant to acute health effects. Continuous mass concentrations were not significantly different from filter-collected gravimetric mass concentrations with 95% confidence intervals during any season. Annual mean PM2.5 concentrations from July 1997 to June 1998 were 17.3, 16.4, 14.1, and 15.3 mug/m(3) at Newark, Elizabeth, New Brunswick, and Camden, NJ, respectively. Monthly averaged 24- and 1-hr daily maximum PM2.5 concentrations suggest the existence of a high PM2.5 (May-October) and a low PM2.5 (November-April) season.PM2.5 magnitudes and temporal trends were very similar across the state during high PM, events. In fact, the between-site coefficients of determination (R-2) for daily PM2.5 measurements were 84-98% for June and July. Additionally, during the most pronounced PM2.5 episode, PM2.5 concentrations closely tracked the daily maximum 1-hr O-3 concentrations. These observations suggest the importance of transport and atmospheric chemistry (i.e., secondary formation) to PM2.5 episodes in New Jersey The influence of local sources was observed in diurnal concentration profiles and annual average between-site differences. Urban wintertime data illustrate that high 1-hr maximum PM2.5 concentrations can occur on low 24-hr PM2.5 days.

  DOI：

  10.1080/10473289.2000.10464214