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全部话题 - 话题: dipolar
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r********d
发帖数: 58
1
来自主题: Chemistry版 - 请教一个NMR问题
The motions of the molecules in solution average out many anisotropic
interactions, thus the linewidth is on the scale of Hz. For solid-state, all
the anisotropic interactions are present, thus the line width is several
orders bigger than solution NMR line width. Magic-angle spinning (MAS) can
greatly improve the resolution(narrow the linewidth) by averaging out the
chemical shift anisotropy,dipolar-dipolar coupling,first order quadrupolar
interaction to certain extent. But the resolution is sti... 阅读全帖
r********d
发帖数: 58
2
来自主题: Chemistry版 - 请教一个NMR问题
The motions of the molecules in solution average out many anisotropic
interactions, thus the linewidth is on the scale of Hz. For solid-state, all
the anisotropic interactions are present, thus the line width is several
orders bigger than solution NMR line width. Magic-angle spinning (MAS) can
greatly improve the resolution(narrow the linewidth) by averaging out the
chemical shift anisotropy,dipolar-dipolar coupling,first order quadrupolar
interaction to certain extent. But the resolution is sti... 阅读全帖
d********a
发帖数: 3698
3
这还辩证? 走极端了,虚无论,没有辨别力。
我觉得你是电影小说看多了,看事物太drama了。
什么都搞得神神秘秘超复杂的。
性格好善良那是有一般传统标准的,这个人善良性格好相处久了一般人都能体会出来的
。按照你的说法,这世界就没有好人坏人了,以极端抹杀一般,进入虚无论。
一般人都是表里如一的,对外人好,对父母也不会差,反之亦然。
这里讨论的普通人,你有dipolar性格的,depressed的,精神不正常,极端相信某教的都不是在此列。
我一辈子也没碰到你所谓的黑社会老大,不过家人是劳改农场的场长,
手下一堆劳动改造的青红帮,都是以前上海滩杜黄手下的混混,
从小就是和他们学象棋钓鱼摸虾的。
还有远方亲戚跑到新疆开夜总会的,手下几十公主少爷,也没有见过你提到这种人。

的这种做法,以后的爱因斯坦和法拉第就找不到老婆了:)
T*******7
发帖数: 636
4
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goooodluck (goodluck) 于 (Mon Dec 14 00:00:32 2009, 美东) 提到:
过来人的经验啊...找lg, 人品是不说了,以下三点, 缺一不可, 否则, 除非你有超人
的智商和情商, 否则, 很难快乐生活.
1, 一定要找以家庭为重的男人. 那些以事业为借口, 逃避家庭责任的男人, 只想他们
自己, 千万不能找. 你要找的是个朝夕相对的爱人, 不是找个co-worker, 他有多聪明
能干, 和你无关. 据说看一个男人是不是好丈夫, 就看他妻子过得怎么样, 那些所谓为
了事业, 把孩子丢给妻子的男人, 他们的妻子有过的滋润一脸幸福的吗? 这种人, 事业
再成功, 也不是个好丈夫, 那对你还有什么意义呢?
2, ;一定要找性格好的男人, 凡事看得开, 不为难自己的人, 才不会为难你.
3, 他的家庭一定要开明宽容. 他有自由, 你的家庭才有自由.
这些和人品一样, 都是天生的, 后天改不了的, jms婚前千万要擦亮眼睛. 不符合这三
条的男人, 不管他说他多爱... 阅读全帖
D**********s
发帖数: 3139
5
好吧,我来沙发帖。偶极式音箱(Dipolar Loudspeaker)跟双极式音箱在构造上相同
,但前向及后向喇叭反相馈以信号,因此其声辐射图形呈倒“8"字形。多用作环绕声音
箱。THX推荐环绕声音箱选用偶极式。买这种箱子吧,不会分散你的注意力的。
a*****y
发帖数: 311
6
For the speakers that I have audited. Maggie 1.7 does sound a lot better
than traditional cone speakers as far as I can tell --- the clarity is
unmatched by the traditional speakers, although I think ML ElectroMotion is
probably even better in clarity. However I think Maggie 1.7 is very
sensitive to the quality of amplifiers. Yesterday I audited Maggie 1.7 first
on a 1600 amplifier and then a 16,000 one, definitely heard the difference.
I am doing my research online and found the following, thin... 阅读全帖
i******2
发帖数: 86
7
来自主题: Biology版 - Paper help, thanks very much! (转载)
【 以下文字转载自 Chemistry 讨论区 】
发信人: intein82 (intein), 信区: Chemistry
标 题: Paper help, thanks very much!
发信站: BBS 未名空间站 (Fri Mar 19 16:36:47 2010, 美东)
PULSE SEQUENCES FOR REMOVAL OF THE EFFECTS OF CROSS-CORRELATION BETWEEN
DIPOLAR AND CHEMICAL-SHIFT ANISOTROPY RELAXATION MECHANISM ON THE
MEASUREMENT OF HETERONUCLEAR T1 AND T2 VALUES IN PROTEINS
Author(s): KAY, LE; NICHOLSON, LK; DELAGLIO, F, et al.
Source: JOURNAL OF MAGNETIC RESONANCE Volume: 97 Issue: 2 Pages: 359-
375 Published: APR 1992
p****s
发帖数: 3153
8
刚才找了一下网上的文献,你似乎把最关键的部分漏掉了。这个方法叫TROSY,是Kurt
Wuthrich发展的,用来做大分子量的生物分子。原理大概是通过dipolar coupling和
CSA的弛豫机制的干涉,并且在INEPT的时候不做decoupling,从而达到保留T2很长的部
分的目的,可以大幅度提高谱的分辨率。不过这听起来像天书吧,哈哈。
s***m
发帖数: 6197
9
来自主题: Biology版 - paper help!
Bailor, M.H., Musselman, C., Hansen, A.L., Gulati, K., Patel, D.J. and Al-
Hashimi, H.M. (2007) Characterizing the
relative orientation and dynamics of RNA A-form helices using NMR residual
dipolar couplings. Nat Protoc, 2,
1536-1546.
Please send it to x****[email protected]
Thanks a lot!
s*******y
发帖数: 1739
10
来自主题: Chemistry版 - 跪求.review opportunities
同求!!!!!!!!!!方向:palladium chemistry, cycloaddition chemistry (especially
3+2 dipolar cycloaddition), medicinal chemistry (anticancer drug analogues),
and steroid chemistry. And some of the bioorganic chemistry would be good
for me too.
s*******[email protected]
i******2
发帖数: 86
11
来自主题: Chemistry版 - Paper help, thanks very much!
PULSE SEQUENCES FOR REMOVAL OF THE EFFECTS OF CROSS-CORRELATION BETWEEN
DIPOLAR AND CHEMICAL-SHIFT ANISOTROPY RELAXATION MECHANISM ON THE
MEASUREMENT OF HETERONUCLEAR T1 AND T2 VALUES IN PROTEINS
Author(s): KAY, LE; NICHOLSON, LK; DELAGLIO, F, et al.
Source: JOURNAL OF MAGNETIC RESONANCE Volume: 97 Issue: 2 Pages: 359-
375 Published: APR 1992
麻烦发至 w********[email protected]
万分感谢!
o**a
发帖数: 86
12
来自主题: Chemistry版 - paper help
Dipolar relaxation and nuclear Overhauser effects in nonrigid molecules: The
effect of fluctuating internuclear distances
The Journal of Chemical Physics 72, 6035 (1980);
Thanks!
n*********r
发帖数: 18
13
来自主题: Macromolecules版 - Organic optoelectronics (3)
All rights reserved!
1.1.2 device operation and efficiency
In general, device opreation includes charge injection, transport,
recominbation and emission.
(1). Electron and hole injection.
The interfacial electronic properties are dominant in carrier injection. The
current understanding of how energy barriers form at cathode and anode
interfaces is far from being complete. Work function difference at those
interfaces is not exactly the barrier because of the formation of ultra thin
dipolar laye
e*****i
发帖数: 993
14
来自主题: _D_SupportGroup版 - 又被打击
我第一天上课的时候自我介绍,我就跟同学说我有SAD,有时候会对大家不太友好,不太
热情,请大家多包涵。后来大家都好帮助我的,主动来跟我说话,问我今天开心不开心
什么的。还有同学跟我说,我们有时候都会depressed,尤其是冬天的时候。我听了好感
动的。尤其是有时候我特别特别depressed,同学主动过来逗我开心,我有时候都能感动得热泪盈眶。。。
楼主MM这个朋友是个中国人?有些中国人不懂这些东西的,会很自以为是。或者其实他们自己都有心理问题。我也遇到过这样的人,苦苦纠缠我,说要解救我,其实他自己也是dipolar,狂躁的时候以为自己可以解救全人类。
m***s
发帖数: 605
15
来自主题: _D_SupportGroup版 - 又被打击
I think the first step is to accept who you are. Even though it may not who
you want to be, you have to learn to live with yourself first. Once this ste
p has solidified, then take a step of learning how to respond to the environ
ment.

感动得热泪盈眶。。。
他们自己都有心理问题。我也遇到过这样的人,苦苦纠缠我,说要解救我,其实他自己
也是dipolar,狂躁的时候以为自己可以解救全人类。
h*****a
发帖数: 116
16
来自主题: _D_SupportGroup版 - 又被打击
赞勇气!
我在公司混,就不敢这样作,因为不知道那样作会带来什么,自己能不能应付。

感动得热泪盈眶。。。
他们自己都有心理问题。我也遇到过这样的人,苦苦纠缠我,说要解救我,其实他自己
也是dipolar,狂躁的时候以为自己可以解救全人类。
e*****i
发帖数: 993
17
突然想到自己多年来,可能也有depression&dipolar,不只是SAD那么简单。幸好经过光照治
疗,现在已经好转了。自己以前就是做药的,知道药物的副作用很大,所以不敢吃药。
大家看看这些:
http://www.mayoclinic.com/health/light-therapy/MY00195
Light therapy is a way to treat seasonal affective disorder, depression and certain other conditions by exposure to bright artificial light.
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