Artículos de revistas: Recent submissions
Now showing items 4041-4060 of 4968
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(Pergamon Press Ltd., 1978-05-29)
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(American Chemical Society, 1979-03-27)
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(American Chemical Society, 1986-08-05)
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(The Italian Pharmacological Society, 1993-06-02)Boldo (Peumus boldus Mol.), a Chilean tree traditionally employed in folk medicine and recognized as a herbal remedy in a number of pharmacopoeias, mainly for the treatment of liver ailments, has recently been the subject ...
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(Pergamon Press, 1990-01-02)highly polar compound isolated from the stem of Petiueria alliacea was shown to be trans-l\r-methyl-C methoxyproline on the basis of its microanalysis and spectral data. Dibenzyl trisulphide, previously unknown as a natural ...
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(Elsevier B.V., 2009-03-03)The mechanisms of the Diels–Alder (DA) reactions of 2-methoxy-5-methyl-1,4-benzoquinone 1 with 2- methyl-1,3-butadiene 2, in the absence and in the presence of LA catalysts, have been studied using the DFT method at the ...
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(Bentham Science Publishers, 2010-11-02)Three different intramolecular Diels-Alder (IMDA) reactions associated with the formation of fused and bridged tricyclodecane skeletons have been studied at the B3LYP/6-31G(d) computational level. While substitution on ...
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(GEORG THIEME, 2003-08-25)Several 2,3-dihydro-7H-dibenzo[de,h]quinolin-7-ones and 7H-dibenzo[de,h]quinolin-7-ones were catalytically hydrogenated over PtO2 in acetic acid to afford 7-hydroxyquinolinc and quinolone derivatives with reduced benzene rings.
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(John Wiley & Sons, Ltd., 2003-01-07)inolin- 7-one, 2,3-dihydro-5-methoxy-7H-dibenzo [de,h] quinolin-7-one, 5-methoxy-6-hydroxy-2,3-dihydro-7Hdibenzo[ de,h]quinolin-7-one, 5,6-dimethoxy-2,3-dihydro- 7H-dibenzo[de,h]quinolin-7-one and 5,6-methylenedioxy- ...
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(Sociedad Chilena de QAuímica, 1999-04-05)A través del estudio de la ubicación e interacción de los orbitales moleculares frontera, se trata de explicar teóricamente el comportamiento donor-aceptor del aducto Diels-Alder Cso-4,5-dimetoxi-o-quinodimetano que es ...
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(John Wiley & Sons, Ltd., 2003-03-10)2,3,8,9,10,11-Hexahydro-7H-dibenzo[de,h]quinolin-7- one, 5-methoxy-2,3,8,9,10,11-hexahydro-7H-dibenzo[de,h] quinolin-7-one, 5-methoxy-6-hydroxy-1,2,3,7a,8,9,10,11, 11a,11b-decahydro-7H-dibenzo[de,h]quinolin-7-one, ...
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(Sociedad Chilena de Química, 2002-05-10)La regioselectividad de la boldina frente a reacciones de nitrosación y halogenación con bromo molecular y N-halosuccinimidas (halo = CI, Br, 1) en ácido acético ha sido estudiada. En este sentido, se encontró experimentalmente ...
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(American Chemical Society and American Society of Pharmacognosy, 2000-03-15)(S)-(+)-Boldine (1) was brominated, chlorinated, and iodinated using molecular bromine in acetic acid or N-halosuccinimides in trifluoroacetic acid. Initial halogenation occurs at C-3, followed (in the cases of chlorine ...
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(Elsevier Science B.V., 2002-07-23)Functional effects of the well-characterized antagonist of L-type Ca2 + channels tetrandrine on recombinant human g-aminobutyric acid type A (GABAA) (a1h2g2s) receptor or human a7, a4h2, a1h1yg and a1h1yq nicotinic ...
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(Elsevier Science Ltd., 2002-12-19)Cytisine (cy) is a potent and competitive partial agonist at α4 subunit-containing nicotinic acetylcholine (nACh) receptors while at homomeric α7-nACh receptors it behaves as a full agonist with a relatively lower potency. ...
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(American Chemical Society, 1971-08-02)
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(Thieme Medical Publishers, Inc., 1995-11-25)Parasitic diseases are widespread in less developed countries, and are a major cause of suffering and inability of the affected populations to improve their own living conditions. Among these diseases, American trypanosomiasis ...
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(Elsevier Ltd., 2011-10-12)The study examined weekdayeweekend differences in ozone, NOx (NO and NO2) and VOC concentrations in Santiago, Chile, from 1999 to 2007. The results provide evidence for the occurrence of an atmospheric phenomenon that ...
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(Sociedad Chilena de Química, 1999-04-05)A través del estudio de la ubicación e interacción de los orbitales moleculares frontera, se trata de explicar teóricamente el comportamiento donor-aceptor del aducto Diels-Alder Cso-4,5-dimetoxi-o-quinodimetano que es ...
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(Springer, 2012)Purpose Recent reports discuss the altered bone homeostasis in cigarette smokers, being a risk factor for osteoporosis and negatively influencing fracture healing. Cigarette smoke is known to induce oxidative stress in ...
