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e****n
发帖数: 111 | 2 组里面有人刚跳槽了，职位还没post到网上。
Boston，Cambridge，中型biotech company，CMC analytical group。 local和有身份
的preferred.
希望你有较强的分析背景，fresh PHD或者1～5年 industrial或postdoc的经验.会
Handel不同型号的LC-MS/MS system。我们主要分析cationic lipid （liposome）和
oligonucleotide,如果你有这方面的经验，我们会优先考虑。毕竟是CMCgroup，希望你
有较强的写作能力。
如果有兴趣，回我站内邮件。 |
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d********y
发帖数: 176 | 3 title:Characterisation of the tin(II) hydroxide cation [Sn3(OH)4]2+, and
the crystal structure of tritin(II) tetrahydroxide dinitrate
author:John D. Donaldson, Susan M. Grimes, Simon R. Johnston and Isaac
Abrahams
J. Chem. Soc., Dalton Trans., 1995, 2273-2276
DOI: 10.1039/DT9950002273, Paper
http://pubs.rsc.org/en/Content/ArticleLanding/1995/DT/dt9950002
My email address: x*********[email protected]
3x! |
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h*******o
发帖数: 1114 | 4 就是用Dionex公司的cation的柱子测standard的时候，其他的离子都能测出来，并且结
果和理论值很接近，但是镁的信号就是非常非常的弱，几乎没有。柱子都是新买的，换
了很多柱子都是这样，这是什么原因呢？请帮我分析一下，谢谢！ |
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z**c
发帖数: 7595 | 5 老革命遇到新问题。
要把固态物分散成以水为分散介质的Emulsion或Suspension。要求粒径在2-20 microns
之间，anionic或cationic particles，常温稳定，Shelf Life一天足够，当然越长越
好。 浓度没要求，别太稀太稠，能够泵输。
基质和水的密度接近，不溶于水，惰性。 我觉得做成稳定的Suspension应该比较困难
，正好它溶于丙二醇及芳香溶剂，把它先液化然后再做成Emulsion比较好。
做Painting和Coating的当然是专家了，但都是核心机密，不会告诉我的，虽然我根本
不涉及他们的领域。 网上也少有资料。
我搞出一个配方，但觉得应该有足够的空间可以提高，哪位高手能有建议没有？
包括：乳化剂及用量，乳化器及乳化条件，等等。先谢过。 |
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c******6
发帖数: 928 | 8 Bin Liu & Guillermo C Bazan. "Synthesis of cationic conjugated polymers for
use in label-free DNA microarrays". Nature protocols, 2006, 1(4), 1698 -1702
. |
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M*********r
发帖数: 148 | 9 k*****[email protected]
Opening is available for a postdoctoral fellow at the chemistry department
of Bowling Green State University, Ohio (group of Ksenija D. Glusac). The
applicant is expected to synthesize and study the electrocatalytic behavior
of flavinium and other iminium cations. The aim of this study is to develop
a fully organic water oxidation catalyst for potential use in solar fuel
cells.
Requirements
PhD in organic electrochemistry is favored. The candidate is expected to
perform multiste... 阅读全帖 |
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W*******e
发帖数: 817 | 10 Cation radical [3 + 2]-cycloaddition of chalcone epoxides: A facile
synthesis of highly substituted tetrahydrofurans
Synlett, (2), 251-254; 2004
thanks |
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W*****s
发帖数: 684 | 11 S. J. Hwang and M. E. Davis, “Cationic Polymers for Gene Delivery: Designs
for Overcoming Barriers to Systemic Administration,” Curr. Opin. Mol. Ther.
, 3, 183 (2001).
Tahnks! |
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s********n
发帖数: 235 | 12 Title: HYDROGEN-PRODUCTION BY H2S PHOTODECOMPOSITION ON ZNFE2O4 CATALYST
Author(s): LU GX; LI SB
Source: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY Volume: 17 Issue: 10
Pages: 767-770 DOI: 10.1016/0360-3199(92)90019-S Published: OCT 1992
Times Cited: 32 (from All Databases)
Title: Distribution and valence of the cations in the spinel system ZnFeGaO4-Fe2GaO4
Author(s): Rabbani S; Riedel E
Source: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES Volume: 51 Issue: 1... 阅读全帖 |
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d******s
发帖数: 674 | 13 First of all, wrong approach: bare silica column in HILIC mode uses silanol
group for retention, which is also the main cause of peak tailing. Adding
TFA which is the common practise in RPC to suppress silanol interference
will not work here.
Why use this column in HILIC mode? Please don't say that you only have this
column.
Reverse phase for peptide/protein digest is the golden standard, and you
will have much better luck to start here. Or, if you are trying to do something
different, you can t... 阅读全帖 |
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l**i
发帖数: 416 | 14 T. Ito "Ion-Channel-Mimetic Sensor for Trivalent Cations Based on Self-
Assembled Monolayers of Thiol-Derivatized 4-Acyl-5-Pyrazolones on Gold" J.
Electroanal. Chem. 2001, 495, 87-97 |
|
n*********e
发帖数: 665 | 15 Could anyone help me get the pdf files of the following papers? Thanks so
much! Have a nice day!
1)
Title: N-Vinylformamide – Building Block for Novel Polymer Structures
Journal of Macromolecular Science, Part A
Volume 34
Issue 10
1997
Link:
http://www.tandfonline.com/doi/abs/10.1080/10601329708010315
2)
Title: Cationic initiation of oligomerization of vinylformamide
Macromolecular Rapid Communications
Volume 18
Issue 12
pages 1075–1083
December 1997
Link:
http://onlinelibrary.wiley.com/doi/10.1... 阅读全帖 |
|
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x**o
发帖数: 134 | 17 I need to do some research on Ion Chromatography. But I didn't involve much
research before in IC and I'd like to do something new or relatively new. I
am hoping to publish something.
We have a dual column (anion and cation) Dionex IC.
Is there anybody in the area? Please shine some lights to me. Many thanks! |
|
j**********i
发帖数: 187 | 18 Title: Modeling ionic strength effects on cation adsorption at hydrous oxide
/solution interfaces
Authors: K.F Hayes,
J.O Leckie
Journal: Journal of Colloid and Interface Science
Volume 115, Issue 2, February 1987, Pages 564–572
多谢了 请发到 w******[email protected] |
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p**********g
发帖数: 378 | 19 Try -CN phase or Cation/anion hybrid C18 columns such as Imtake Sherzo SM
C18... |
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d********y
发帖数: 176 | 21 不可能有那么大的shift，amide I肯定是在1680 到1620 cm-1之间，再怎么shift，也
shift不到1550cm-1.
calcium acetate 比较靠谱，但是不一定完全对，一般说来1550的那个峰是salt of
carboxylic acid,到底cation是calcium,sodium,barium 光靠FTIR不一定能确定。 |
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n******y
发帖数: 1821 | 22 CACS Young Chemist/Scientist Award 2013, Calling for Submission
PURPOSE
The CACS Young Chemist Award Program was established by Tri-State Chinese
American Society (CACS) in 2003. The CACS Young Chemist Award is dedicated
to promoting chemistry and science as a career choice among young Chinese
Americans in the greater Tri-State area. CACS is proud to announce the Young
Chemist/Scientist Award 2013 program to recognize and support high school
students with outstanding accomplishments in chemistry... 阅读全帖 |
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y***o
发帖数: 416 | 23 不好意思，又有三篇Organometallics文献，需要求助。多谢了！
Cationic Methyl- and Chlorotitanium Phosphinimide Complexes
Organometallics, 2005, 24 (6), pp 1091–1098
DOI: 10.1021/om0492202
http://pubs.acs.org/doi/pdf/10.1021/om0492202
Functionalizing Titanium−Phosphinimide Complexes
Organometallics, 2006, 25 (20), pp 4779–4786
DOI: 10.1021/om060565p
http://pubs.acs.org/doi/pdf/10.1021/om060565p
Selective Catalytic Dimerization of Neohexene by [Cp*Ti(NPtBu3)Me][B(C6F5)4]
Organometallics, 2008, 27 (24), pp 6596–6604... 阅读全帖 |
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a*****g
发帖数: 1320 | 24 I can't figure out how to d these problems, I know you are all experts, so
please help me out!
15. A student mixes 85.5 mL of 0.150 M nickel (II) nitrate and 124.4 mL of
0.0888 M sodium hydroxide. (a) Identify the precipitate and give the
molecular, ionic, and net ionic equations. (b) Determine the mass of
precipitate formed, and (c) calculate the concentration of the excess cation
that reacted. (0.512 g, 0.0348 M)
16. When a 0.5250 g sample containing chloride is reacted with silver
nitr... 阅读全帖 |
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S*********h
发帖数: 61 | 25 【 以下文字转载自 Macromolecules 讨论区 】
发信人: Sionseventh (simon), 信区: Macromolecules
标 题: Paper Help, thanks
发信站: BBS 未名空间站 (Thu Apr 23 16:10:25 2015, 美东)
Any body can give a help on the following paper? Thanks
Photoinitiated Cationic Polymerization
Annual Review of Materials Science
Vol. 13: 173-190 (Volume publication date August 1983)
DOI: 10.1146/annurev.ms.13.080183.001133 |
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w******e
发帖数: 953 | 26 Chem Soc Rev. 2012 Nov 7;41(21):7147-94. doi: 10.1039/c2cs35094g. Epub 2012
Aug 10.
Cationic polymers and their therapeutic potential. |
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U**********b
发帖数: 13 | 27 【 以下文字转载自 Postdoc 讨论区 】
发信人: UofLlaserlab (UofLlaserlab), 信区: Postdoc
标 题: Post-doc Positions in Molecular Spectroscopy
发信站: BBS 未名空间站 (Mon May 23 14:08:21 2016, 美东)
Two Post-doc Positions in Molecular Spectroscopy at the University of
Louisville and the Ohio State University.
Two post-doctoral positions in experimental and theoretical molecular
spectroscopy are available in the research groups of Prof. Jinjun Liu at the
University of Louisville (UofL) and Prof. Terry A. Miller at the Ohio Stat... 阅读全帖 |
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d********y
发帖数: 176 | 28 http://onlinelibrary.wiley.com/doi/10.1002/masy.19910420119/pdf
Article
Inhibiting or cocatalytic effect of water and other additives on cationic
polymerization of cyclodimethylsiloxanes
Authors
P. Sigwalt,
C. Gobin,
P. Nicol,
M. Moreau,
M. Masure
First published: March 1991Full publication history
DOI: 10.1002/masy.19910420119View/save citation
Cited by: 14 articlesCitation tools
Funding Information
Abstract
Cyclodimethylsiloxanes such as hexamethylcyclotrisiloxane (D3) and
octamethyl-cyclotetr... 阅读全帖 |
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h***g
发帖数: 337 | 30 这行的需求不大，比结构设计少，比金融就更少了。学金融的不局限在金融行业，各行
各业都需要做金融的。从就业的角度，肯定学金融，就业面广，可以减小不必要的relo
cation。 |
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L******k
发帖数: 33825 | 31 纽约州教育局的网站
关于具体的考试咨询 你去搜索一下
NYSTCE
New York State Teacher Certification Exam
NY和NJ的不通用，每个州的要求不同！
你在纽约那里？ 你要是在Teacher Education PRogram的话 你们学校的school of Edu
cation会有人给你做这个方面的咨询的。
当老师 不是说你考试考过了就可以的，你要完成州里的要求。 |
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j*********1
发帖数: 110 | 32 有要发论文的，有审稿机会的，能给我个机会吗？急求审稿机会，谢谢！
求审稿机会，不论什么杂志，只要相关即可。博猴3年，一直没留意去搞REVIEW，急了
，请班主班粉大虾小虾多帮帮忙。
背景：45+ papers, 10+ first authors, citations, ~200，论文所在杂志影响因子3.
5+
而REVIEW只有无意中做过2个。太少了，不过做的很仔细很好。
专业：
Epitaxial Growth & Characterizations
Semiconductor Optoelectronics: Semiconductor Lasers, Photodetectors,
Electrical & Optical
Characterizations, Device Modeling, etc.
Solid State and Semiconductor Physics: Energy Band Theory (k·p theory),
Heterostructure
Physics, Computations of Optical & Electrical Param... 阅读全帖 |
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c*******n
发帖数: 1648 | 33 I don't think the free radical can make it, degradative chain transfer could
happen. However, the cationic polymerization probably do. If you have time,
check out some textbook on polymerization, such as Odian's. Take a look at the
table for monomer and corresponding polymerization method. Generally vinyl
ether can not be polymerized by free radical.
of |
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c****n
发帖数: 134 | 34 The boss just told me that I can't finish before my graduation.
In addition, this group doesn't have much experience with photoelectrical
properties.
copolymerization can be difficult when there is vast difference in the nature
of the two monomers.
vinyl carbazole is the most reactive monomer in cationic polymerization. |
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i*********a
发帖数: 2 | 35 这个星期就要把我的论文题目定下来，请大家帮我看一下下面几个题目那个比较有前途，非常感谢！
1:Role of hard segment architecture on the physical properties of model pol
yurethanes
2:Analysis of new polymers used in high-qulity stretch films
3:Associative and bioadhesive properties of reponsive polymers
4:structure/property relationships in polymer nanocomposites
5
n)
6:functionalised polythiophenes as electrochemical sensors for metal cations
另外还有比如nanaopore analysisi, pervaporation membrane, Bio/nanotechnology:
self assembled peptide nanotu |
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b**s
发帖数: 589 | 36 zhi ge shai zi ba
I am serious
途
pol
polymerisatio
cations
Bio/nanotechnology:
景 |
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c***r
发帖数: 4631 | 37
途
pol
polymerisatio
cations
Bio/nanotechnology:
景
cab
太难了。太复杂了。
例如基体可以有级性非级性，结晶非结晶。
搀杂相可以有点，线，面，体。
而每一种又有自己不同的结构特征。
性能可以有光，声，电，磁，力，热，渗透，防火，腐蚀，辐射等等。
结构研究方法可以有X种。
这要是都能列出来三个Ph.D.都出来了。 |
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t*******n
发帖数: 66 | 38 Could anyone give me some information about how to add the amino group in the
end by the living cationic polymerization?
thanks a lot |
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s******n
发帖数: 48 | 39 这种人不少,bio的特多【 在 cation (缺少电子) 的大作中提到: 】 |
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c*s
发帖数: 2145 | 40 seems intriguing to me, hehe
it is a liquid, while it has very low vapore pressure and high thermo
stability and boiling point. It is a highly polar solvent and therefore it is
conductive.
It cound consist of small anions and cations, it can also consist of small
ions and polymers as counter ions.
how many versatility one can imagine in this system |
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r******0
发帖数: 2753 | 41 Does anyone know any vendors I can buy polymers from, except Aldrich and Scien
tific Polymers? Thanks. I need buy some polyacrylates copolymer with cations on side chains but the copolymer cannot be water-soluble. :) |
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s****e
发帖数: 2934 | 42 多谢斑竹！希望不会被我烦死。
可是我不明白斑竹说的colloidal crystal是什么？是指形成的colloid之间有相互作用么
？you said "I doubt that this is possible", and I would like to know what is "
some special fluid dynamics treatment" too. could you discuss it in detail?
Do you think I can use ionic end group( cationic on polymer A and anionic on
polymer B) to make them organize firstand then react?
Actually, my system is particle A in micelle A' and particle B in micelle B',
do you still think the hard sphere will attract each other strongly a |
|
s****e
发帖数: 2934 | 43 Photoinitiators for Free Radical Cationic & Anionic Photopolymerisation, 2nd
Edition (Hardcover)
by James V. Crivello, et al. |
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t*****m
发帖数: 73 | 44 平常一直做的是protein,peptide的MALDI，这几天老板让我测一个合成的copolymer，
一半是ammounium iodide的端基,一半是-O-COC(CH3)2Br的端基.M大约3000.查了一下文
献，基本上都是测中性高分子的，除了加Matrix外还要Sodium salt作为cation agent.
我的Matrix用的是2,5-DHB,salt试了NaI和sodium trifluoroacetate.但都不能得到任
何信号，除了在低分子量附近有DHB的峰，剩下的都是噪音。DHB用于高分子的MALDI好
吗？salt选什么好？谁有经验的指导一下！3ks! |
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z********i
发帖数: 5 | 45 我是南开大学的本科生
大一大二在物理院学习，大三时候转到化学，现在已经修完化学院课程
数学学的比较好，获得过天津市数学竞赛（数理组）一等奖
学分绩87左右
有过一些研究经历
A, 2007年5月——2008年7月 研究多种体系的可溶性交联大分子。（实验由老师设计，我和其他两个本科生完成实验，文章由我翻译成英文）
B, 2007年12月——现在 计算化学，从头算方法研究PEO离子液体的热力学动力学性质（这个方向需要补的知识太多，一直在跟师兄学习，刚刚有自己的小课题）
C, 2008年7月——现在 研究硅小球—高分子核壳结构及其催化作用（老师给出方向后，由我独立阅读文献，设计实验计划并进行的实验）
发表或者递交出的文章（其实文章发表的不是很好，一篇ACS会议的我还是4作上火呵呵，还有其他3篇发表的杂志也不好）：
a，Synthesis soluble cross-linked poly(methyl methacrylate -divinylbenzene-natural rubber）by radical and cationic double active center
b，Contr |
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n*******r
发帖数: 213 | 46 背景很好啊，申请polymer engineering吧。去材料系找老板。按材料系的排名来吧。
你这个物理背景学材料系的课程不会有问题，加上有化学背景，会比一般材料系学生强
，应该是如鱼得水，我知道材料系非常需要化学知识，而材料系的学生化学都不行，成
为他们很大的障碍。UIUC？Florida University？RPI？Cornell？另外，材料系的比较
容易找工作。
化工系的polymer应该也可以，不过我不了解。试试哥大的教授。
，我和其他两个本科生完成实验，文章由我翻译成英文）
质（这个方向需要补的知识太多，一直在跟师兄学习，刚刚有自己的小课题）
后，由我独立阅读文献，设计实验计划并进行的实验）
呵，还有其他3篇发表的杂志也不好）：
-natural rubber）by radical and cationic double active center |
|
B*******e
发帖数: 111 | 47 数学物理背景强的在很多领域里都是个很大的优势。比如有关rheology，polymer
processing， thermodynamics，传热，甚至在催化反应， 聚合物纳米复合材料等方向
都很有用。高分子本身是个大杂烩。搞高分子的有很多力学，数学，物理学背景出身的
，你不妨找几个高分子教授的文章瞧一瞧。 在与polymer相关的很多方向（合成用到的
数理背景相对较少，不过你搞个kinetics不也需要这方面背景吗），最后其实都需要用
数学物理语言来描述，只不过相关程度的强弱有所不同而已。
，我和其他两个本科生完成实验，文章由我翻译成英文）
质（这个方向需要补的知识太多，一直在跟师兄学习，刚刚有自己的小课题）
后，由我独立阅读文献，设计实验计划并进行的实验）
呵，还有其他3篇发表的杂志也不好）：
-natural rubber）by radical and cationic double active center |
|
m*****e
发帖数: 1506 | 48 is aromatic Ph-I active to use as the initiator for ATRP? Is it stable in
the presence of metal cation (Cu)? |
|
w**********4
发帖数: 2 | 49 同学，
首先感谢你的关心。
本不想回答你的问题，因为你的证明说明你不是一个很好的Professional.
知道吗，Ma 和Sawa在做Living Radical 前，都是从事Living Cationic Polymn.
但你的问题又很好，因为它也是很多人的质疑：谁是ATRP的原始构思和实践人？
因为我在准备Legal Action， 在此许多事情不宜详述。
敬请查看下列文献，一个有常识的人都会得出相同的结论：
1，in C&E News (June 5, p46 & 48, 1995), ATRP was reported as a new living
polymerization in which only Ma's name was mentioned without me even though
the report was based on the first ATRP paper in JACS with myself as first
author. After I fought with him and C&EN, Ma later issued a state |
|
r*******e
发帖数: 83 | 50 强烈支持老王！！！
同学，
首先感谢你的关心。
本不想回答你的问题，因为你的证明说明你不是一个很好的Professional.
知道吗，Ma 和Sawa在做Living Radical 前，都是从事Living Cationic Polymn.
但你的问题又很好，因为它也是很多人的质疑：谁是ATRP的原始构思和实践人？
因为我在准备Legal Action， 在此许多事情不宜详述。
敬请查看下列文献，一个有常识的人都会得出相同的结论：
1，in C&E News (June 5, p46 & 48, 1995), ATRP was reported as a new living
polymerization in which only Ma's name was mentioned without me even though
the report was based on the first ATRP paper in JACS with myself as first
author. After I fought with him and C&EN, Ma later iss |
|
