由买买提看人间百态

topics

全部话题 - 话题: spectra
首页 上页 1 2 3 4 5 6 7 8 9 10 (共10页)
d********O
发帖数: 1196
1
Title: Ultraviolet spectra and structure of zinc-cellulose complexes in zinc
chloride solution
Journal: Journal of Applied Polymer Science
Year: 1999 Vol: 71 page:1441-1446
Thank you again!
s*****x
发帖数: 12
2
【作者】 Eberhardt, Udo; Deppisch, Bertold; Musso, Hans.
【文题】nisotropy effects of conjugated cyclic systems. V. Proton NMR
spectra of mesityl-substituted aromatic 6.pi. systems.
【期刊名,年份,卷(期),起止页码】Chemische Berichte (1983), 116(1),
119-135
【全文链接】http://www3.interscience.wiley.com/journal/112304612/abstract
多谢!!
u*******[email protected]
h*******o
发帖数: 1114
3
来自主题: Chemistry版 - 有人用过Eigenvector的PLS toolbox吗?
非常感谢!就是说我有40多个Raman谱图(是从零时间到全部生成产物的终点),是水
解反应A+H2O---〉B+C+D——〉C+D,B是intermediate,最后全部生成C(完全水解产物
),没有calibration spectra,在这种情况下,用PCA建Model还需要做cross
validation吗?如何分析data以求得rate constant(假定反应为first order)?
h*******o
发帖数: 1114
4
来自主题: Chemistry版 - 请麻烦推荐
请麻烦推荐一个适合MCR(multivariate curve resolution) model 的preprcocessing
method for Raman spectra data.
I used baseline(weighed least squares) and Normalization. Any other comments?
非常感谢!大包子献上!
a***i
发帖数: 109
5
来自主题: Chemistry版 - paper help
Quantum-chemical calculations of the IR absorption spectra of modified
polytetrafluoroethylene forms.
Russian Journal of Physical Chemistry (2006), 80, (12), 1940-1948. Publisher
Thanks
p******e
发帖数: 247
6
来自主题: Chemistry版 - Paper help
Ab initio study of phenyl benzoate: structure, conformational analysis,
dipole moment, IR and Raman vibrational spectra.
Journal of molecular modeling (2003), 9, (4), 248-58.
Please send to x**********[email protected]
Thanks~
j******0
发帖数: 258
7
来自主题: Chemistry版 - paper help
Sjöblom, J., O. Svensson, M. Josefson, H. Kullberg and S. Wold, “An
evaluation of orthogonal signal correction applied to calibration transfer
of near infrared spectra,”
Chemo. and Intell. Lab. Sys.,
44, 229-244, 1998.
j******0
发帖数: 258
8
来自主题: Chemistry版 - paper help
Wold, S., H. Antti, F. Lindgren, J. Ohman.
"Orthogonal signal correction of near-infrared spectra",
Chemometrics and Intelligent Laboratory Systems, 44: 175--185. 1998.
Many thanks!
s*********g
发帖数: 1107
9
来自主题: Chemistry版 - paper help please! Thanks a lot!
Deconvolution of electrochemical impedance spectra for the identification of
electrode reaction
mechanisms in solid oxide fuel cells
Author(s): Schichlein H, Muller AC, Voigts M, Krugel A, Ivers-Tiffee E
Source: JOURNAL OF APPLIED ELECTROCHEMISTRY Volume: 32 Issue: 8
Pages: 875-882
Published: AUG 2002
d**a
发帖数: 3715
10
来自主题: Chemistry版 - 请教怎么算band gap 包子
得到UV-Vis Spectra 后,怎么计算optical band gap?
d**a
发帖数: 3715
11
来自主题: Chemistry版 - 请问哪有破解的MestRe Nova 下载。
我的那个6.0版本45天的试用期过了。主要想做一下coupling constant 和NMR spectra
stack 分析。谢谢
i*********s
发帖数: 2451
12
来自主题: Chemistry版 - 求电子版,谢谢!
【作者】:
Author(s): Sawai Y (Sawai, Yoshitaka)1, Takimoto B (Takimoto, Baku)1, Nabika
H (Nabika, Hideki)1, Murakoshi K (Murakoshi, Kei)1
【文题】:
Anti-Stokes/Stokes ratio of surface-enhanced Raman scattering spectra
observed at a metal nano-gap arrayed on a solid surface
【期刊名,年份,卷,起止页码】:
Source: CANADIAN JOURNAL OF ANALYTICAL SCIENCES AND SPECTROSCOPY Volume:
52 Issue: 3 Pages: 142-149 Published: 2007
【链接】:
http://apps.isiknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch
b******k
发帖数: 37
13
来自主题: Chemistry版 - old paper help
Journal of Raman Spectroscopy
1975 ,Volume 3 Issue 2-3, Pages 133 - 141
Raman spectra of gases. XV: Hydrazine and hydrazine-d4
J. R. Durig, M. G. Griffin, R. W. Macnamee
Many thanks.
i*o
发帖数: 202
14
【 以下文字转载自 Physics 讨论区 】
发信人: ito (恩恩), 信区: Physics
标 题: 请教 2photon absorption and emission wavelengths
发信站: BBS 未名空间站 (Thu Aug 26 13:39:40 2010, 美东)
请教一下有没有人有以下各种dye 的2photon absorption and emission spectra 的资料
PE
PE Texas Red
PE cy7
PerCp-Cy5.5
APC
APC-cy7
Alexa Fluo 430
任何信息都可以 谢谢!!
f******n
发帖数: 137
15
I guess it might be caused by the scattering of large particles crashing out
during the evaporation of the solvent. There is nothing wrong with the
instrument itself because it always give some reasonable spectra for
solutions.
g********9
发帖数: 14
16
来自主题: Chemistry版 - paper help! Thanks
1) Evaluation of a delayed coking process by 1H and 13C NMR spectroscopy. 1.
Material balances.
Rodriguez, Joaquin; Tierney, John W.; Wender, Irving.
Fuel (1994), 73(12), 1863-9.
2) Evaluation of a delayed coking process by 1H and 13C NMR spectroscopy. 2.
Detailed interpretation of liquid NMR spectra.
Rodriguez, Joaquin; Tierney, John W.; Wender, Irving.
Fuel (1994), 73(12), 1870-5.
j*******[email protected]
Thanks. 10 Baozi
f*********2
发帖数: 156
17
来自主题: Chemistry版 - two papers with links, thank you
paper 1:
Neutral, alkaline and difference ultraviolet spectra of secondary
metabolites from Penicillium and other fungi, and comparisons to published
maxima from gradient high-performance liquid chromatography with diode-array
detection.
http://www.ncbi.nlm.nih.gov/pubmed/2211911
Paper 2:
https://springerlink3.metapress.com/content/x750p32h25701745/resource-secured/?target=fulltext.pdf&sid=uq5xyx55p0tnlj55x5fkocr4&sh=www.springerlink.com
email: x******[email protected]
Thanks a lot
Email: x******g@o... 阅读全帖
d********y
发帖数: 176
18
来自主题: Chemistry版 - 请教一下关于FTIR-ATR
i forgot to mention that gas phase IR spectra usually have P/R branches
with many sharp bands. the feature you mentioned didn't have that.

IR
cut
d****i
发帖数: 360
19
来自主题: Chemistry版 - Help me! Thanks!
Carbon-13 and Proton Nuclear Magnetic Resonance Spectra of Veratrum
Alkaloids
First PageHi-Res PDF[420 KB]Citing ArticlesWilliam Gaffield, Mabry Benson,
Robert E. Lundin, Richard F. Keeler
J. Nat. Prod., 1986, 49 (2), pp 286–292
Thanks a lot!
f*********e
发帖数: 1144
20
sounds quite complicated for undergrads:) espcially the de novo part, I have
a lot of trouble manually interpreting spectra as a postdoc in MS field
l**u
发帖数: 42
21
来自主题: Chemistry版 - Paper help! Thanks!
The effect of apodization and finite resolution on Fourier transform Raman
spectra
Spectrochimica Acta Part A: Molecular Spectroscopy
Volume 47, Issues 9-10, 1991, Pages 1171-1178
Link:
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6THM-
Thank you!
u**s
发帖数: 384
22
来自主题: Chemistry版 - paper help
1. Title: Progress toward automated metabolic profiling of human serum:
Comparison of CPMG and gradient-filtered NMR analytical methods
Author:Laura H. Lucasa, 1, Cynthia K. Larivea, 2, Patricia Stone Wilkinsonb
and Stephen Huhn
Journal:Journal of Pharmaceutical and Biomedical Analysis
Volume 39, Issues 1-2, 1 September 2005, Pages 156-163
link:http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TGX-4G4PBT8-2&_user=437158&_coverDate=09%2F01%2F2005&_rdoc=1&_fmt=high&_orig=gateway&_origin=g... 阅读全帖
b****u
发帖数: 2771
23
你把条件具体些 不然大家怎么帮你
蛋白多大, 是单蛋白还是混合物
Do you observe good LC peaks, good MS2 spectra?
1) 楼上 说的 换protease, you can try Glu-C
2) in ur search engine (e.g MASCOT) include methionine oxidation,and N, Q
deamidation, (or 1 C13)
one mis-cleavage. After the first search, select all query and re-search
with error tolerant search. BTW, make sure your search settings are
compliance to the LTQ characteristics.
3) the most comprehensive way,(may be overkill for your purpose) you can use
MUDPIT setup and do a shor... 阅读全帖
m*********s
发帖数: 323
24
来自主题: Chemistry版 - NMR 问题
No, do not trust the H-NMR from Chemdraw (11). Far from the real spectra. (
k***e
发帖数: 62
25
来自主题: Chemistry版 - 求一片文献
Ultraviolet–visible absorption spectra of the colloidal metallic elements
J. Chem. Soc., Faraday Trans., 1991, 87, 3881-3891
多谢多谢!
b*****y
发帖数: 175
26
来自主题: Chemistry版 - 求助:奇怪的质谱结果
Thanks a lot for all your responses.
I did just inject the sample directly (highly acidic) and I did not have a
good spectra at all. The reason I am doing basic pH was based on our
previous experience and the recommended column conditions. Also I always
perform intact protein analysis and tryptic digestion peptide analysis
together. Trypsin works best at pH7-8 so I always try to use ammonium
bicarbonate to achieve this pH and have minimum salt after lyophilization.
I highly suspect vitamin C con... 阅读全帖
w*****9
发帖数: 1
27
来自主题: Chemistry版 - 上海-无机纳米材料博士英雄帖
Describe the purpose of this job and why it exists:
The xxx Chemical Company is offering an exciting and challenging opportunity for an Inorganic Chemist. This position is responsible for developing nano-scale inorganic particles for photovoltaic.
The individual must have experience and in-depth knowledge of nano inorganic particle synthesis. The experience on synthesis of down-converting or up-converting materials for photovoltaic applications is highly preferred.
Qualifications:
Ph.D degree ... 阅读全帖
j******0
发帖数: 258
28
来自主题: Chemistry版 - paper help
Paper
Standardization of Raman spectra for transfer of spectral libraries across
different instruments
Jason D. Rodriguez, Benjamin J. Westenberger, Lucinda F. Buhse and John F.
Kauffman
Analyst, 2011, Advance Article
DOI: 10.1039/C1AN15636E
v*****s
发帖数: 20290
29
absorption spectra? 完全没问题。
s**********x
发帖数: 4593
30
来自主题: Chemistry版 - paper help
Infrared Physics
Volume 10, Issue 2, June 1970, Pages 91–94
“Infrared spectra of liquid H2O and D2O” (1970)
http://www.sciencedirect.com/science/article/pii/00200891709000
s**********[email protected]
w**********n
发帖数: 90
31
I, II, III, IV的电子版,非常感谢!
a****s
发帖数: 8624
32
只找到1,等下我发link给你
l*******e
发帖数: 1519
y****i
发帖数: 1504
a****s
发帖数: 8624
35
找到这个link
http://archive.org/details/molecularspectra032774mbp
是第一卷,里面可以选项要的格式,pdf epub什么的
http://archive.org/details/MolecularSpectraMolecularStructureIi
第三卷
w**********n
发帖数: 90
36
多谢多谢,muah~~~
h********g
发帖数: 143
37
Also, the 13C-79Br coupling constant is about 135 Hz.
But the coupling constant in my spectra are 26 Hz and 16 Hz.
h****a
发帖数: 580
38
来自主题: Chemistry版 - 求文献,赠送包子
Title: H-1-NMR SPECTRA AND CONFORMATIONS OF PROPANE-1,2-DIOL, MESO-RACEMIC
AND RACEMIC BUTANE-2,3-DIOLS, AND SOME ALDITOLS IN NONAQUEOUS MEDIA
Author(s): GALLWEY FB; HAWKES JE; HAYCOCK P; et al.
Source: JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 Issue: 11
Pages: 1979-1985 DOI: 10.1039/p29900001979 Published: NOV 1990
请发到 i*************[email protected]
Thanks.
z***3
发帖数: 496
39
来自主题: Chemistry版 - need paper help~~~~~~~
D. Owens and R. Wendt, "Estimation of the Surface Free Energy of Polymers",
Journal of Applied Polmer Science, v13 (1969) 1741.
F. Boerioa, J. Boerioa, and R. Bozian, "Infrared Spectroscopy of Thin
Organic Films on Metal Surfaces", Applied Surface Science, v31 (1988) 42
A. Girlando and J. Gordon, "Raman Spectra of Molecules on Metal Surfaces",
Surface Science, v101 (1980) 417.
Thanks for your help :)
2*********[email protected]
s********n
发帖数: 235
40
来自主题: Chemistry版 - Paper help! Thanks!
Title: INVESTIGATION OF THE FERMI EDGE IN SODIUM TUNGSTEN BRONZES BY PHOTO-
ELECTRON SPECTROSCOPY
Author(s): EGDELL, RG; HILL, MD
Source: CHEMICAL PHYSICS LETTERS Volume: 85 Issue: 2 Pages: 140-144
DOI: 10.1016/0009-2614(82)80318-7 Published: 1982
http://www.sciencedirect.com/science/article/pii/00092614828031
Title: OPTICAL TRANSITION TO FERMI LEVEL IN NAXWO3
Author(s): GIULIANI, G; STELLA, A; GUSTINET.A
Source: PHYSICS LETTERS A Volume: A 38 Issue: 7 Pages: 515-& DOI: 10.
1016/0... 阅读全帖
K*********e
发帖数: 183
41
It is OK, I can accept that I made mistakes and the fact that I forgot
things I used to know.
OK, I fixed my last question, I will say if it is in acidic condition (
Positive mode), the bottom two -OHs are basic enough to take the H+.
When I was doing my chores, I realized no matter what, alcohol should be
more acidic than basic, it is my bad.
I still have questions, but without the spectra, it is hard to discuss
further.
Thank you anyway.
K*********e
发帖数: 183
42
It is OK, I can accept that I made mistakes and the fact that I forgot
things I used to know.
OK, I fixed my last question, I will say if it is in acidic condition (
Positive mode), the bottom two -OHs are basic enough to take the H+.
When I was doing my chores, I realized no matter what, alcohol should be
more acidic than basic, it is my bad.
I still have questions, but without the spectra, it is hard to discuss
further.
Thank you anyway.
a*****e
发帖数: 97
43
来自主题: Chemistry版 - Possible identity of a compound?
We even separated the peak from the mixture by LC fraction collector and
shows the 406 and 264nm. This peak is interesting coze it has the above UV
spectra with little fluoresence at(ex 420 em 480nm) and may be a new
cofactor. Hard to pinpoint a really new guy in metabolomics.

mixture.
a*****e
发帖数: 97
44
来自主题: Chemistry版 - Possible identity of a compound?
We even separated the peak from the mixture by LC fraction collector and
shows the 406 and 264nm. This peak is interesting coze it has the above UV
spectra with little fluoresence at(ex 420 em 480nm) and may be a new
cofactor. Hard to pinpoint a really new guy in metabolomics.

mixture.
i*n
发帖数: 9793
45
来自主题: Chemistry版 - paper help please
E. Dinc, F. Onur, Application of a new spectrophotometric method for the ana
lysis of a ternary mixture
containing metamizol, paracetamol and caffeine in tablets. Analytica chimica
acta 359 (1998) 93-106.
A. Afkhami, M. Bahram, Mean centering of ratio spectra as a new spectrophoto
metric method for the
analysis of binary and ternary mixtures. Talanta 66 (2005) 712-720.
s********n
发帖数: 235
46
来自主题: Chemistry版 - Paper help! Thanks!
Title: Bi-209 NQR spectra of Bi2M4O9 (M=Al, Ga) and Bi2Ge3O9
Author(s): Kravchenko, EA; Hai, FS; Kargin, YF
Source: INORGANIC MATERIALS Volume: 33 Issue: 8 Pages: 847-849
Published: AUG 1997
Title: OPTICAL-PROPERTIES OF BI2GE3O9 SINGLE-CRYSTALS - X-RAY-IRRADIATION
EFFECTS
Author(s): ZALDO, C; CONTRERAS, L; ARIZMENDI, L; et al.
Source: PHYSICA STATUS SOLIDI A-APPLIED RESEARCH Volume: 114 Issue: 1
Pages: 397-405 DOI: 10.1002/pssa.2211140142 Published: JUL 16 1989
Title: CRYSTAL-GRO... 阅读全帖
s********n
发帖数: 235
47
来自主题: Chemistry版 - Paper help! Thanks!
Report on Notation for the Spectra of Polyatomic Molecules
Journal of Chemical Physics / Volume 23 / Issue 11
J. Chem. Phys. 23, 1997 (1955); http://dx.doi.org/10.1063/1.1740655
http://jcp.aip.org/resource/1/jcpsa6/v23/i11/p1997_s1?isAuthori
many thanks!
x********[email protected]
d********y
发帖数: 176
48
http://pubs.rsc.org/en/content/articlelanding/1968/J2/J29680000
The infrared spectra and vibrational assignments of the acetyl halides
J. A. Ramsey and J. A. Ladd
J. Chem. Soc. B, 1968, 118-122
DOI: 10.1039/J29680000118
多谢! 请发到x*********[email protected]
h***o
发帖数: 350
49
来自主题: Chemistry版 - paper help ( Chinese Physics Letters)
Temperature Characteristics of Raman Spectra in Nanometer Material Titanium
Dioxide
Wu Xijun1,2, Zhang Ming-sheng1, Yin Zhen1,3, Ji Xiaoli1,4 and Chen Qiang1
1994 Chinese Phys. Lett. 11 685
doi:10.1088/0256-307X/11/11/008
http://iopscience.iop.org/0256-307X/11/11/008
Thank you very much!
C*****G
发帖数: 81
50
来自主题: Chemistry版 - Paper help! Thanks!
Linear combination of lorentzian and gaussian profiles to fit resonance
spectra
Authors: J.J. Peyre, G. Principi
Nuclear Instruments and Methods
Volume 101, Issue 3, 15 June 1972, Pages 605–606
http://www.sciencedirect.com/science/article/pii/0029554X729005
many thanks!
x********[email protected]
首页 上页 1 2 3 4 5 6 7 8 9 10 (共10页)