| 查看: 273 | 回复: 4 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[交流]
请高手润色一段话
|
|||
| With decreasing concentration, the number of CS2 molecules located at single β-carotene molecule increases relatively，so intermolecular interaction of β-carotene is weakened. In addition, the large density of CS2 reduces the purturbation of external environment, and the CC bonding of β-carotene is forced evenly, which induces further enhancement degree of structural order of β-carotene molecule. The lower the concentration is, the more rapid the enhancement in induced degree of structural order of β-carotene is. So electronic delocalization is enhanced in β-carotene chain by high degree of structural order of β-carotene[25]. Furthermore, this fact can be proved by two hands. With decreasing concentration, firstly, the UV-visible spectrum of β-carotene in CS2 progressively narrows, and secondly, the depolarization ratio of the CC stretching modes of β-carotene in CS2 becomes large in the Raman spectra. According to D.Yu.Paraschuk and Kobryanskii’s a qualitative nonlinear model of coherent weekly damped electron-lattice vibrations[4], the degree of delocalization of π electron is enhanced, so the density of mobile π electrons between adjacent carbon sites in the β-carotene chain strongly modulates the strength of their covalent bonding giving a high electron-phonon coupling, which results in the peculiar phenomenon that RSCS is extremely high. |
回复此楼» 猜你喜欢
假如你的研究生提出不合理要求
已经有8人回复
-
萌生出自己或许不适合搞科研的想法，现在跑or等等看？
已经有4人回复
-
Materials Today Chemistry审稿周期
已经有4人回复
-
参与限项
已经有3人回复
-
实验室接单子
已经有4人回复
-
全日制（定向）博士
已经有4人回复
-
对氯苯硼酸纯化
已经有3人回复
-
求助:我三月中下旬出站，青基依托单位怎么办？
已经有12人回复
-
所感
已经有4人回复
-
要不要辞职读博？
已经有7人回复
jw227
木虫 (著名写手)
课题组长
- 翻译EPI: 2
- 应助: 1 (幼儿园)
- 贵宾: 1.06
- 金币: 3576.8
- 红花: 1
- 帖子: 1671
- 在线: 292.6小时
- 虫号: 236869
- 注册: 2006-04-03
- 性别: MM
- 专业: 天然有机化学
★
doudounba(金币+1,VIP+0):感谢你对我求助的关心，以前有一段文章您帮改的很好，从你的态度你也很是对小木虫更是关心负责，你的疑问，我已在下面说明！ 9-19 14:41
doudounba(金币+1,VIP+0):感谢你对我求助的关心，以前有一段文章您帮改的很好，从你的态度你也很是对小木虫更是关心负责，你的疑问，我已在下面说明！ 9-19 14:41
|
楼主刚求助翻译完这段http://muchong.com/bbs/viewthread.php?tid=1548004&fpage=1 为什么又求助修改，其目的令人怀疑，而且所用小木虫登陆名不同，利用马甲，发表翻译帖子，行为有些争议 |
3楼2009-09-17 17:07:08
pan0827
新虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 637.3
- 帖子: 66
- 在线: 18.5小时
- 虫号: 822062
- 注册: 2009-08-04
- 性别: MM
- 专业: 抗炎与免疫药物药理
2楼2009-09-17 15:31:03
yuyang031985
金虫 (正式写手)
- 应助: 1 (幼儿园)
- 金币: 1020.1
- 散金: 22
- 红花: 3
- 帖子: 372
- 在线: 166.9小时
- 虫号: 328822
- 注册: 2007-03-22
- 性别: GG
- 专业: 药物学其他科学问题
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
doudounba(金币+15,VIP+0): 9-18 15:48
zap65535(金币+19,VIP+0):补发 12-22 13:02
doudounba(金币+15,VIP+0): 9-18 15:48
zap65535(金币+19,VIP+0):补发 12-22 13:02
| The number of CS2 molecules located at single β-carotene molecule increases with decrease in concentration, and thus the intermolecular interaction of β-carotene is weakened. In addition, the large density of CS2 prevents the purturbation of external environment, and the CC bonding of β-carotene is forced evenly, which could cause further improvement of structural order of β-carotene molecule. The lower the concentration is, the larger the enhancement is. Therefore, the electronic delocalization is enhanced in β-carotene chain by high degree of structural order of β-carotene[25]. This fact can be proved by two hands. Firstly, with decreasing concentration, the UV-visible spectrum of β-carotene in CS2 progressively becomes narrow. Secondly, the depolarization ratio of the CC stretching modes of β-carotene in CS2 becomes larger in the Raman spectra. According to the previous report by D.Yu.Paraschuk and Kobryanskii, a qualitative nonlinear model of coherent weekly damped electron-lattice vibrations[4], the degree of delocalization of π electron is enhanced, so the density of mobile π electrons between adjacent carbon sites in the β-carotene chain strongly modulates the strength of their covalent bonding giving a high electron-phonon coupling, which results in the peculiar phenomenon that RSCS is extremely high. |
4楼2009-09-17 18:48:43
5楼2009-09-18 10:34:37