24小时热门版块排行榜

返回列表

当前主题已经存档。

guojjun

铜虫 (著名写手)

应助: 1 (幼儿园)
金币: 112.6
红花: 9
帖子: 1125
在线: 274.6小时
虫号: 83974
注册: 2005-08-02
性别: GG
专业: 微/纳机械系统

[交流] 转贴：托马斯.盖尔:科学大百科全书第三版，2004最新版

发在化学版，呵呵，斑竹建议这里更合适，只好转来请大家自己下了。
Gale Encyclopedia of Science
Edition 3
Published by Thomson Gale

这本参考书填补了在高技术和介绍性材料之间的空白。六卷本包含了科学、工程、技术以及数学和健康医学等的方方面面，提供了现代科学技术的全面知识。
按字母顺序排列，每个条目主要描述科学概念，提供科技领域的信息。同时还包含大量的图示。
这里我选一个最短的条目作为示例，在这个条目下的其他细节情大家自己查看：
Carboxyl group
A carboxyl group, also called a carboxy group, is a characteristic group of atoms found in organic molecules. Organic compounds that contain carboxyl groups are called carboxylic acids. The carboxyl group occurs on the end or side of a molecule. The group consists of a carbon atom that forms two chemical bonds to one oxygen atom and one chemical bond to a second oxygen atom. This second oxygen is also bonded to a hydrogen atom. The arrangement is written -COOH or -C(O)OH (which emphasizes the different chemical bonding between the carbon atom and one of the oxygen atoms). The name “carboxyl” is actually a combination of the words “carbonyl” and” hydroxyl,” because the carboxyl group itself can be considered as a combination of carbonyl (CO) and hydroxyl (OH) groups.

帖子原址

[ Last edited by mainpro on 2005-12-5 at 13:05 ]

回复此楼