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Showing 1 to 12 of 158 entries
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[Analysis on chemical components of Ligustrum lucidum by ultra performance liquid chromatography-electrospray ionization-quadrupole-time of flight-mass spectrometry].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Jiang Y, Yao W, Zhang L, Ding A.
PMID: 23189739
Zhongguo Zhong Yao Za Zhi. 2012 Aug;37(15):2304-8.

OBJECTIVE: To make a qualitative analysis on chemical components in Ligustrum lucidum by UPLC-ESI-Q-TOF-MS.METHOD: ACQUITY UPLC BEH C18 (2.1 mm x 100 mm, 1.7 microm) column was adopted, with methyl cyanides-0.1% formic acid as the mobile phase for gradient...

About the shape of thread molecules in solution.

Experientia

KUHN W.
PMID: 20260161
Experientia. 1947 Aug 15;3(8):315-8. doi: 10.1007/BF02164242.

No abstract available.

[Chemical constituents from Bidens bipinnata].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Wang XY, Chen GR, Deng ZY, Zhao J, Ge JF, Li N, Chen FH.
PMID: 25282892
Zhongguo Zhong Yao Za Zhi. 2014 May;39(10):1838-44.

To investigate the chemical constituents of the whole plants of Bidens bipinnata, the separation and purification of constituents were performed by chromatography on macroporous resin, silica gel, MCI and Sephadex LH-20. Their structures were elucidated by spectroscopic data as...

Determination of phosphodiesterase-5 inhibitors and analogs using high-performance liquid chromatography with ultraviolet detection.

Journal of chromatographic science

Nickum EA, Flurer CL.
PMID: 24668043
J Chromatogr Sci. 2015 Jan;53(1):38-46. doi: 10.1093/chromsci/bmu010. Epub 2014 Mar 24.

A considerable number of erectile dysfunction products, and dietary supplements suspected of containing phosphodiesterase-5 (PDE-5) inhibitors, have been analyzed by the US Food and Drug Administration. Often these samples are found to contain the approved active pharmaceutical ingredients (APIs)...

N.

Molecules (Basel, Switzerland)

Del Bene JE, Alkorta I, Elguero J.
PMID: 31491953
Molecules. 2019 Sep 05;24(18). doi: 10.3390/molecules24183232.

Ab initio Møller-Plesset perturbation theory (MP2)/aug'-cc-pVTZ calculations have been carried out in search of complexes, molecules, and transition structures on HN(CH)SX:SCO potential energy surfaces for X = F, Cl, NC, CCH, H, and CN. Equilibrium complexes on these surfaces...

Toward Complete Sequence Flexibility of Nucleic Acid Base Analogue FRET.

Journal of the American Chemical Society

Wranne MS, Füchtbauer AF, Dumat B, Bood M, El-Sagheer AH, Brown T, Gradén H, Grøtli M, Wilhelmsson LM.
PMID: 28613885
J Am Chem Soc. 2017 Jul 12;139(27):9271-9280. doi: 10.1021/jacs.7b04517. Epub 2017 Jun 27.

Förster resonance energy transfer (FRET) using fluorescent base analogues is a powerful means of obtaining high-resolution nucleic acid structure and dynamics information that favorably complements techniques such as NMR and X-ray crystallography. Here, we expand the base-base FRET repertoire...

Radical Ring-Opening Polymerization: Scope, Limitations, and Application to (Bio)Degradable Materials.

Chemical reviews

Tardy A, Nicolas J, Gigmes D, Lefay C, Guillaneuf Y.
PMID: 28085265
Chem Rev. 2017 Feb 08;117(3):1319-1406. doi: 10.1021/acs.chemrev.6b00319. Epub 2017 Jan 13.

Cyclic monomers bearing either vinyl or exomethylene groups have the ability to be polymerized through a radical pathway via a ring-opening mechanism (addition-fragmentation process), leading to the introduction of functionalities in the polymer backbone. Radical ring-opening polymerization (rROP) combines...

Identification of Serratane Synthase Gene from the Fern Lycopodium clavatum.

Organic letters

Saga Y, Araki T, Araya H, Saito K, Yamazaki M, Suzuki H, Kushiro T.
PMID: 28102682
Org Lett. 2017 Feb 03;19(3):496-499. doi: 10.1021/acs.orglett.6b03659. Epub 2017 Jan 19.

Ferns are known to produce onoceroids including onoceranes and serratanes having unusual structures among triterpenes. From the fern Lycopodium clavatum, a novel onoceroid synthase gene was cloned that showed high sequence identity with a previously identified α-onocerin synthase. Functional...

[Studies on chemical constituents of rhizomes of Sophora tonkinensis].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Pan QM, Huang RZ, Pan YM, Wang HS, Liang D.
PMID: 28845648
Zhongguo Zhong Yao Za Zhi. 2016 Jan;41(1):96-100. doi: 10.4268/cjcmm20160119.

Thirteen compounds were isolated from the 95% aqueous EtOH extract of the rhizomes of Sophora tonkinensis by a combination of various chromatographic techniques including column chromatography over silica gel, Sphadex LH-20, MCI, ODS, and semi-preparative HPLC.Their structures were elucidated...

Supramolecular coordination: self-assembly of finite two- and three-dimensional ensembles.

Chemical reviews

Chakrabarty R, Mukherjee PS, Stang PJ.
PMID: 21863792
Chem Rev. 2011 Nov 09;111(11):6810-918. doi: 10.1021/cr200077m. Epub 2011 Aug 24.

No abstract available.

Characterization of stationary phases by a linear solvation energy relationship utilizing supercritical fluid chromatography.

Journal of separation science

Mitchell CR, Benz NJ, Zhang S.
PMID: 20730839
J Sep Sci. 2010 Oct;33(19):3060-7. doi: 10.1002/jssc.201000371.

Supercritical fluid chromatography was utilized in combination with the Abraham model of linear solvation energy relationship to characterize 11 different HPLC stationary phases. System constants were determined at one supercritical fluid chromatography condition for each stationary phase. The results...

Complexity from small molecules.

Nature nanotechnology

Boekhoven J.
PMID: 30323360
Nat Nanotechnol. 2018 Nov;13(11):979-980. doi: 10.1038/s41565-018-0283-z.

No abstract available.

Showing 1 to 12 of 158 entries