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Showing 1 to 12 of 390 entries
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Synthesis of enantiopure 1,2-azido and 1,2-amino alcohols .

Tetrahedron, asymmetry

Wang HY, Huang K, De Jesús M, Espinosa S, Piñero-Santiago LE, Barnes CL, Ortiz-Marciales M.
PMID: 26843787
Tetrahedron Asymmetry. 2016 Feb 15;27(2):91-100. doi: 10.1016/j.tetasy.2015.12.002.

A practical and convenient method for the efficient and regio- and stereoselective ring-opening of enantiopure monosubstituted epoxides by sodium azide under hydrolytic conditions is reported. The ring-opening of enantiopure styryl and pyridyl (

The Mechanism Underlying the Antibacterial Activity of Shikonin against Methicillin-Resistant Staphylococcus aureus.

Evidence-based complementary and alternative medicine : eCAM

Lee YS, Lee DY, Kim YB, Lee SW, Cha SW, Park HW, Kim GS, Kwon DY, Lee MH, Han SH.
PMID: 26265924
Evid Based Complement Alternat Med. 2015;2015:520578. doi: 10.1155/2015/520578. Epub 2015 Jul 21.

Shikonin (SKN), a highly liposoluble naphthoquinone pigment isolated from the roots of Lithospermum erythrorhizon, is known to exert antibacterial, wound-healing, anti-inflammatory, antithrombotic, and antitumor effects. The aim of this study was to examine SKN antibacterial activity against methicillin-resistant Staphylococcus...

Frontiers in plant science

Szurman-Zubrzycka ME, Zbieszczyk J, Marzec M, Jelonek J, Chmielewska B, Kurowska MM, Krok M, Daszkowska-Golec A, Guzy-Wrobelska J, Gruszka D, Gajecka M, Gajewska P, Stolarek M, Tylec P, Sega P, Lip S, Kudełko M, Lorek M, Gorniak-Walas M, Malolepszy A, Podsiadlo N, Szyrajew KP, Keisa A, Mbambo Z, Todorowska E, Gaj M, Nita Z, Orlowska-Job W, Maluszynski M, Szarejko I.
PMID: 29515615
Front Plant Sci. 2018 Feb 21;9:216. doi: 10.3389/fpls.2018.00216. eCollection 2018.

TILLING (Targeting Induced Local Lesions IN Genomes) is a strategy used for functional analysis of genes that combines the classical mutagenesis and a rapid, high-throughput identification of mutations within a gene of interest. TILLING has been initially developed as...

The determination of ionic transport properties at high pressures in a diamond anvil cell.

The Review of scientific instruments

Wang Q, Liu C, Han Y, Gao C, Ma Y.
PMID: 28040923
Rev Sci Instrum. 2016 Dec;87(12):123904. doi: 10.1063/1.4971304.

A two-electrode configuration was adopted in an in situ impedance measurement system to determine the ionic conductivity at high pressures in a diamond anvil cell. In the experimental measurements, Mo thin-films were specifically coated on tops of the diamond...

Crystal structure of 4,5-bis-(3,4,5-tri-meth-oxy-phen-yl)-2H-1,2,3-triazole methanol monosolvate.

Acta crystallographica. Section E, Structure reports online

Madadi NR, Penthala NR, Bommagani S, Parkin S, Crooks PA.
PMID: 25484710
Acta Crystallogr Sect E Struct Rep Online. 2014 Sep 24;70:o1128-9. doi: 10.1107/S1600536814020911. eCollection 2014 Oct 01.

The title compound, C20H23N3O6·CH3OH, was synthesized by [3 + 2] cyclo-addition of (Z)-2,3-bis-(3,4,5-tri-meth-oxy-phen-yl)acrylo-nitrile with sodium azide and ammonium chloride in DMF/water. The central nitro-gen of the triazole ring is protonated. The dihedral angles between the triazole ring and the...

Taming chlorine azide: access to 1,2-azidochlorides from alkenes.

The Journal of organic chemistry

Valiulin RA, Mamidyala S, Finn MG.
PMID: 25719396
J Org Chem. 2015 Mar 06;80(5):2740-55. doi: 10.1021/acs.joc.5b00009. Epub 2015 Feb 26.

The in situ preparation and trapping of chlorine azide provided a versatile one-pot method for the azidochlorination of alkenes. Gaseous ClN3 generated from sodium azide, hypochlorite, and acetic acid can be explosive if isolation is attempted. Instead, we generated...

Abiotic reversible self-assembly of fulvic and humic acid aggregates in low electrolytic conductivity solutions by dynamic light scattering and zeta potential investigation.

The Science of the total environment

Esfahani MR, Stretz HA, Wells MJ.
PMID: 26282742
Sci Total Environ. 2015 Dec 15;537:81-92. doi: 10.1016/j.scitotenv.2015.08.001. Epub 2015 Aug 14.

The aggregation of humic substances and their interaction with filtration media (membranes, soils) has implications for our understanding of membrane fouling during water treatment, the facilitated transport of contaminants, and the transport of organic matter through the microbial loop....

The breakdown of malathion in soil and soil components.

Microbial ecology

Gibson WP, Burns RG.
PMID: 24233575
Microb Ecol. 1977 Sep;3(3):219-30. doi: 10.1007/BF02010619.

The disappearance of the organophosphorus insecticide, malathion, from a silt loam soil and from its organic and inorganic components was examined. Half-lives and the time taken for 90% decomposition in nonsterile, sodium azide-treated, and 2.5 Mrad-irradiated soils were similar...

Singlet oxygen production in thylakoid membranes during photoinhibition as detected by EPR spectroscopy.

Photosynthesis research

Hideg E, Spetea C, Vass I.
PMID: 24311071
Photosynth Res. 1994 Feb;39(2):191-9. doi: 10.1007/BF00029386.

Exposure of isolated spinach thylakoids to high intensity illumination (photoinhibition) results in the well-characterized impairment of Photosystem II electron transport, followed by degradation of the D1 reaction centre protein. In the present study we demonstrate that this process is...

Regio- and Stereocontrolled Formation of Chiral Epoxy Oxazolidines via Bromocarbamation of N-Boc Alkenyl Oxazolidines. Application to Asymmetric Synthesis.

The Journal of organic chemistry

Agami C, Couty F, Hamon L, Venier O.
PMID: 11671515
J Org Chem. 1997 Apr 04;62(7):2106-2112. doi: 10.1021/jo962277g.

Treatment of alpha-alkenyl N-Boc oxazolidines with N-bromosuccinimide leads to epoxy oxazolidines via a bromocyclocarbamation reaction which is completely stereoselective. Action of sodium azide on these epoxides, followed by a few functional group manipulations, eventually affords chiral beta-amino alcohols which...

Synthesis of Cyclopropyl-Fused Carbocyclic Nucleosides via the Regioselective Opening of Cyclic Sulfites.

The Journal of organic chemistry

Moon HR, Kim HO, Chun MW, Jeong LS, Marquez VE.
PMID: 11674546
J Org Chem. 1999 Jun 25;64(13):4733-4741. doi: 10.1021/jo990010m.

The syntheses of some carbocyclic nucleosides that are conformationally locked as "northern" mimics of antiviral active, ring-expanded oxetanocin analogues are reported. The target compounds derived their rigid conformation from a common bicyclo[3.1.0]hexane template. The uracil (3a), cytosine (3b), and...

Antioxidant effect of red wine anthocyanins in normal and catalase-inactive human erythrocytes.

The Journal of nutritional biochemistry

Tedesco I, Luigi Russo G, Nazzaro F, Russo M, Palumbo R.
PMID: 11834210
J Nutr Biochem. 2001 Sep;12(9):505-511. doi: 10.1016/s0955-2863(01)00164-4.

Previous studies reported that aged red wine, but not novel red wine or white wine protects human red blood cells from oxidative damage induced in vitro by H(2)O(2.) Here, we demonstrate that the beneficial properties of aged red wine...

Showing 1 to 12 of 390 entries