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Showing 25 to 36 of 1408 entries
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Mechanistic evaluation of the halocyclization of 4-penten-1-ol by some Bis(2-substituted pyridine) and Bis(2,6-disubstituted pyridine)bromonium triflates.

The Journal of organic chemistry

Cui XL, Brown RS.
PMID: 10970306
J Org Chem. 2000 Sep 08;65(18):5653-8. doi: 10.1021/jo000449a.

The halocyclization reaction of 4-penten-1-ol mediated by various bis(2-substituted pyridine) and (2,6- disubstituted pyridine)bromonium triflates (P(2)Br(+)OTf(-)) was investigated to determine the influence of the substituents on the mechanism of reaction. In all cases, the reaction proceeds via a two-step...

[Monitoring and analysis of CO2 and CH4 using long path FTIR spectroscopy over Beijing].

Guang pu xue yu guang pu fen xi = Guang pu

Xu L, Liu JG, Gao MG, Lu YH, Liu WQ, Wei XL, Zhu J, Zhang TS, Chen J.
PMID: 17655096
Guang Pu Xue Yu Guang Pu Fen Xi. 2007 May;27(5):889-91.

Recently, the greenhouse effect is well known and is of great worldwide concern. CO2 and CH4 are two of the main human activity-induced greenhouse gases in the atmosphere. It is important for environmental scientists to monitor their long-term variation....

Tuning the electronic structures of semiconducting SiC nanotubes by N and NHx (x=1,2) groups.

The Journal of chemical physics

He T, Zhao M, Xia Y, Li W, Song C, Lin X, Liu X, Mei L.
PMID: 17129153
J Chem Phys. 2006 Nov 21;125(19):194710. doi: 10.1063/1.2360269.

We investigate the stable configurations and electronic structures of silicon carbide nanotubes (SiCNTs) decorated by N and NHx (x=1,2) groups by using first-principles calculations. We find that these groups can be chemically incorporated into the network of SiCNTs in...

[A method of eliminating the water vapor interference simultaneously in open path FTIR measurement by instrumental line shape correction].

Guang pu xue yu guang pu fen xi = Guang pu

Xu L, Liu JG, Gao MG, Lu YH, Liu WQ, Wei XL, Zhang TS, Chen H, Liu ZM.
PMID: 18720800
Guang Pu Xue Yu Guang Pu Fen Xi. 2008 May;28(5):1052-6.

Water vapor absorption, which exists in mid-infrared region, is an interferential element for infrared spectra analysis. A new method, which can be used to eliminate the water vapor interference in FTIR measurement, is presented. To calculate the high resolution...

Template-controlled face-to-face stacking of olefinic and aromatic carboxylic acids in the solid state.

Organic letters

Mei X, Liu S, Wolf C.
PMID: 17552533
Org Lett. 2007 Jul 05;9(14):2729-32. doi: 10.1021/ol071039c. Epub 2007 Jun 07.

A rigid 1,8-dipyridylnaphthalene template for supramolecular organization of unsaturated dicarboxylic acids in the solid state has been developed. Self-assembly of the template and aromatic dicarboxylic acids generates nondistorted paracyclophane and pyridinophane architectures with perfectly superimposed pi-systems. The dipyridyl template...

[Passive remote measurement of flame infrared image by a FTIR scanning imaging system].

Guang pu xue yu guang pu fen xi = Guang pu

Liu ZM, Gao MG, Liu WQ, Lu YH, Zhang TS, Xu L, Wei XL.
PMID: 19271480
Guang Pu Xue Yu Guang Pu Fen Xi. 2008 Nov;28(11):2520-2.

The present paper introduced a FTIR scanning imaging system. This system is based on the combination of a FTIR spectrometer and a scanning mirror. So it has the advantage of FTIR spectrometer: non-contact, real-time, celerity, nicety and high sensitivity....

CDX2 as a marker for intestinal differentiation: Its utility and limitations.

World journal of gastrointestinal surgery

Saad RS, Ghorab Z, Khalifa MA, Xu M.
PMID: 22180832
World J Gastrointest Surg. 2011 Nov 27;3(11):159-66. doi: 10.4240/wjgs.v3.i11.159.

CDX2 is a nuclear homeobox transcription factor that belongs to the caudal-related family of CDX homeobox genes. The gene encoding CDX2 is a nonclustered hexapeptide located on chromosome 13q12-13. Homeobox genes play an essential role in the control of...

Influence of sodium chloride on antioxidant enzyme activity and lipid oxidation in frozen ground pork.

Meat science

Lee SK, Mei L, Decker EA.
PMID: 22062318
Meat Sci. 1997 Aug;46(4):349-55. doi: 10.1016/s0309-1740(97)00029-6.

Ground pork containing 0-2.0% NaCl was stored at -15 °C for 10 weeks. During storage both thiobarbituric acid reactive substances (TBARS) and lipid peroxides increased with increasing NaCl concentrations. The activity of catalase (CAT), glutathione peroxidase (GSH-Px) and Superoxide...

The first case of an actinide polyrotaxane incorporating cucurbituril: a unique 'dragon-like' twist induced by a specific coordination pattern of uranium.

Chemical communications (Cambridge, England)

Mei L, Wu QY, Liu CM, Zhao YL, Chai ZF, Shi WQ.
PMID: 24572934
Chem Commun (Camb). 2014 Apr 07;50(27):3612-5. doi: 10.1039/c4cc00690a. Epub 2014 Feb 26.

In situ assembly of a cucurbituril-based pseudorotaxane and a uranyl nitrate precursor under hydrothermal conditions affords the first actinide polyrotaxane with a unique 'dragon-like' twist, which is induced by the specific coordination pattern of uranium and stabilized by hydrogen...

2-Amino-6-chloro-N-methyl-benzamide.

Acta crystallographica. Section E, Structure reports online

Liang YH, Mei XD, Li YF, Pan WL, Ning J.
PMID: 24454086
Acta Crystallogr Sect E Struct Rep Online. 2013 Oct 16;69:o1642. doi: 10.1107/S1600536813027827. eCollection 2013 Oct 16.

In the title compound, C8H9ClN2O, the dihedral angle between the benzene ring and the methyl-amide substituent is 68.39 (11)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, forming layers parallel to the ab plane.

[Monitoring and analysis of urban ozone using open path Fourier transform infrared spectrometry].

Guang pu xue yu guang pu fen xi = Guang pu

Li S, Gao MG, Zhang YJ, Liu WQ, Xu L, Tong JJ, Cheng SY, Jin L, Wei XL, Wang YP, Chen J.
PMID: 22295771
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Dec;31(12):3256-9.

An ozone monitoring system was developed by the method of open path Fourier transform infrared (OP-FTIR) spectrometry based on our FTIR spectrometer. In order to improve measurement precision and detection limit, the quantitative analysis was completed to get ozone...

Identifying association under a previous linkage peak on chromosome 16 for body mass index using cross-sectional and longitudinal data of the Framingham Heart Study.

BMC proceedings

Li X, Mei L, Yang K, Rotter JI, Guo X.
PMID: 20017965
BMC Proc. 2009 Dec 15;3:S101. doi: 10.1186/1753-6561-3-s7-s101.

We performed association analysis under a previous linkage peak on chromosome 16 with genome-wide single-nucleotide polymorphism (SNP) data to identify genetic variants underlying body mass index (BMI). Data from all subjects with baseline measures and a subgroup who had...

Showing 25 to 36 of 1408 entries