Browsing by Subject "Physical and Theoretical Chemistry"
Now showing items 21-36 of 36
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(2005)The distribution, orientation, and dynamics of benzyl alcohol and benzyl ethers dissolved in nematic lyotropic liquid crystals were analyzed using nuclear magnetic resonance (NMR) and molecular simulations. The molecules ...
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(2006)Ozone and UV radiation were analyzed at eight stations from tropical to sub-Antarctic regions in South America. Ground UV irradiances were measured by multichannel radiometers as part of the Inter American Institute for ...
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(1991)Photoexcitation of 1‐pyrenyldiazomethane (1) leads to carbenes which attach to various molecules, e.g. surfactants, polymers, hydroxylated surfaces. This provides a convenient method of labelling these compounds with pyrene ...
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(1989)Abstract The quenching of the benzophenone triplet by lysozyme and its constituent amino acids in aqueous solutions have been studied. Native lysozyme quenches the benzophenone triplet with a high rate constant, 4 × ...
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(2009)Photoreduction of oxoisoaporphine (OIA) (l-aza-benzo-[de]anthracen-7-one) and its 5-methoxy (5-MeOOIA) derivative by selected amines (two non-a-hydrogen-donating amines (l,4-diaza[2.2.2]-bicyclooctane (DABCO) and ...
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(1988)The enthalpies of the reaction between glutathione and amoxycillin have been measured directly using a flow microcalorimeter. Comparative results are obtained by using an ac polarographic method previously developed in our ...
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Preparation of new cationic complexes [(η5-C5H5)Fe(dppe)L]PF6 with sulphur and other donor ligands (1994)The reaction of (η5-C5H5)Fe(dppe)I with the ligand L′ (L′ = S2(CH3)2, C6H5SNR2 (R = CH3, C6H11), S(NC4H8O)2, P(n-Bu)3, tetrahydrofuran and NC5H5 in the presence of T1PF6 have been investigated. Formation of the new cationic ...
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(2009)The exposure of organisms to ultraviolet radiation (UVR) is characterized by the climatology (annual cycle) and the variance (anomalies) of biologically-weighted irradiances at eight geographical locations in austral South ...
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(1991)A model for catecholamine storage in vesicles is analyzed within the SCRF‐CNDO/2 approach including continuum solvent effects. The model considers the approach of cationic norepinephrine (NE) to a positively charged ...
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(1985)Abstract— The quenching rate of triplet benzophenone in water and/or water mixtures has been determined employing vitamin C, vitamin E, cystine, cysteine, reduced and oxidized glutathione, methionine and DL‐penicillamine. ...
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(2005)Thyronine derivatives are essential indicators of thyroid gland diseases in clinical diagnosis and are currently used as standards for developing ordinary biochemical assays. Photo-oxidation of gland hormones of the thyronine ...
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(2001)Detection of O2(1Δg) emission, λmax = 1270 nm, following laser excitation and steady-state methods were employed to measure total, kT, and chemical, kR, reaction rate constants for the reaction between 3-methylindole and ...
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(1987)A complete description of the rotational isomerism of monothioformic acid is presented. Ab initio results concerning the barrier heights and the energy difference between the stable isomers are in good agreement with the ...
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(American Society for Photobiology, 1997)The kinetics of fluorescence quenching of pyrene and three of its derivatives by a series of n-alkylpyridinium ions has been studied. The quenching process is diffusion controlled for all the systems studied, independent ...
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(2006)Full title: Two new hybrid organic/inorganic copper(II)-oxovanadate(V) diphosphonates: [Cu2(phen)2(O3PCH2PO 3)(V2O5)(H2O)]·H 2O and [Cu2(phen)2(O3P(CH 2)3PO3)(V2O5)] ·C3H8. Synthesis, structure, and magnetic properties. ...
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(2003)Data is presented on the quenching of 9,10-dicyanoanthracene by benzene derivatives in acetonitrile. The quenching occurs via a charge transfer mechanism with the quenching rate constants exhibiting a Rehm-Weller dependence ...