androstene-(5)-triyl-(3β,4β,17β)-triacetate | 74996-90-0

• 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: androstene-(5)-triyl-(3β,4β,17β)-triacetate
• 英文别名: (10R)-3c,4c,17c-Triacetoxy-10r,13c-dimethyl-(8cH,9tH,14tH)-Δ⁵-tetradecahydro-1H-cyclopenta[a]phenanthren；Androsten-(5)-triyl-(3β,4β,17β)-triacetat；3β,4β,17β-Triacetoxy-androsten-(5)
• CAS: 74996-90-0
• 化学式: C₂₅H₃₆O₆
• 分子量: 432.557
• InChiKey: WAZZPUAIJVWJML-KDBZTBCGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.35
• 重原子数：
  31.0
• 可旋转键数：
  3.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  78.9
• 氢给体数：
  0.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  androstene-(5)-triyl-(3β,4β,17β)-triacetate 在 盐酸 、 氢氧化钾 、 乙醇 作用下， 生成 睾酮
  参考文献：
  名称：

  Hosoi, Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1947, vol. 67, p. 129,131

  摘要：

  DOI：
• 作为产物：
  描述：

  (3b,17b)-雄甾-5-烯-3,17-二醇 3,17-二乙酸酯 在 selenium(IV) oxide 、 溶剂黄146 、 苯 作用下， 生成 androstene-(5)-triyl-(3β,4β,17β)-triacetate
  参考文献：
  名称：

  Sterols. CXVII. Sapogenins. XLVI. The Structure of Pseudosapogenins

  摘要：

  DOI：

  10.1021/ja01848a039

文献信息

• The Z/I Imaging Digital Camera System
  作者：A. Hinz、H. Heier

  DOI：10.1111/0031-868x.00158

  日期：2000.10

  Market needs for airborne and spaceborne imagery used in photogrammetry and GIS applications are changing. Fundamental changes in sensors, platforms and applications are currently taking place. Most recently, new high resolution spaceborne sensors have become available. Besides classical photogrammetry, new thematic applications will drive the future image market. Savings in cost and time, together with the need for higher and reproducible radiometric resolution or spectral information will push forward the change from analogue to digital imagery. High resolution satellites will compete with airborne film‐based photography and digital camera systems.

  With the availability of a digital airborne camera, it is possible to completely close the digital chain from image acquisition to exploitation and data distribution. The key decision regarding the camera design in this case is whether a linear or area array sensor should be used. In view of the high geometric accuracy requirements in photogrammetry, Z/I Imaging has focused development on a digital camera based on an area sensor. An essential aspect of this decision was not only the aerial camera system, but also the entire photogrammetric process to the finished photographic or mapping product. If this point of view is adopted, it becomes clear that the development of a digital camera involves more than simply exchanging film for silicon. Aspects such as data transfer rates, in‐flight data processing and storage, image archiving, georeferencing, colour fusion, calibration and preprocessing have the same influence on the economic assessment of a digital camera system. This paper describes current development activities and application aspects of a digital modular airborne camera system.

  市场对摄影测量和地理信息系统应用中使用的机载和空间图像的需求正在发生变化。传感器、平台和应用正在发生根本性的变化。最近，新的高分辨率机载传感器已经问世。除了传统的摄影测量，新的专题应用也将推动未来的图像市场。成本和时间的节省，以及对更高和可重复的辐射分辨率或光谱信息的需求，将推动模拟图像向数字图像的转变。高分辨率卫星将与机载胶片摄影和数字照相系统展开竞争。有了数字机载照相机，就有可能实现从图像采集到利用和数据分发的完整数字链。在这种情况下，相机设计的关键决定因素是应使用线性还是面积阵列传感器。鉴于摄影测量中对几何精度的高要求，Z/I Imaging 将开发重点放在了基于面积传感器的数码相机上。这一决定的一个重要方面不仅是航空摄影系统，还包括从摄影测量过程到摄影或制图成品的整个过程。从这个角度看，数码相机的开发显然不仅仅是将胶片换成硅片那么简单。数据传输速率、飞行中的数据处理和存储、图像存档、地理参照、色彩融合、校准和预处理等方面对数码相机系统的经济评估具有同样的影响。本文介绍了数字模块化机载照相机系统目前的开发活动和应用方面的情况。