Facultad de Ciencias Químicas y Farmacéuticas: Recent submissions
Now showing items 1121-1140 of 4850
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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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(2005)Surface-enhanced micro-Raman spectroscopy (micro-SERS) was used to detect traces of the hazardous pollutant polycyclic aromatic hydrocarbons (PAHs) pyrene and benzo[c]phenanthrene deposited onto a calix[4]arene-functionalized ...
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(2002)A direct and simple second derivative digital spectrophometric method has been developed for the simultaneous determination of the sulfamethoxazole and trimethoprim in pharmaceutical formulation. A study of the spectral ...
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(Sociedad Chilena de Quimica, 2000)Physicochemical parameters, ε, λ, solubility in water and Brij-35, pKa, Ka and photostability for dihydroeuparin, 5-acetyl-2, 3-dihydro-6-hydroxi-2-isopropenyl-benzo (b) furan (from Senecio Graveolens), were obtained and ...
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(Swets en Zeitlinger B.V., 1997)Acaena splendens H. et A., Rosaceae, has been used in Chilean traditional medicine for the treatment of fever and inflammation. The antipyretic and antiinflammatory properties of the infusion, methanol, petroleum ether and ...
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(Sociedad Chilena de Quimica, 2000)Polypropylene (PP) was functionalized in solution by grafting with monomethyl itaconate (MMI) by using xylene and decalin as solvents and 2,5-dimethyl-2,5-bis(tert-buthylperoxy)hexane (Lup. 101 ) as radical initiator. The ...
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(1996)FT-IR and FT-Raman spectra of Caulerpin, a green algae pigment, have been recorded. An assignment of the observed bands is proposed on the basis of previously reported vibrational spectra of similar structures. Intensity ...
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(2002)Carbon paste electrodes modified with β-cyclodextrin have been investigated for voltammetric determination of nitrendipine. The immobilization of the β-cyclodextrin on the carbon paste leads to a modification of the electrode ...
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(2004)The effects of electric fields on hydrogen bonding in ammonia-formic acid system, are examined with STO-3G and 6-31 G(d) wavefunctions. This system was used in a previous work to model hydrogen bonding in crystalline amino ...
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(2002)We have previously shown that subjects exposed to acute hypobaric hypoxia display an erythrocyte membrane protein band 3 with an increased susceptibility to proteolytic degradation. We suggested it was due to an oxidative ...
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(1996)A study was done of seasonal variations of pesticide contents in waters of the Aconcagua river basin and Aromos dam in the V Region of Chile by solid phase extraction (SPE) and Chromatographic determination with GC-ECD, ...
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(1996)The reactivity of the electrochemically generated nitro radical anion from nicardipine, nitrendipine and nimodipine, all nitro aryl 1,4-dihydropyridine derivative, with relevant thiols, was quantitatively assessed by cyclic ...
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(2005)The ESR spectra of radicals obtained by electrolytic reduction of 2-acylpyridines and 6,6′-diacyl-2,2′-bipyridines were measured in dimethylsulfoxide (DMSO) and analyzed by quantum chemical calculations. The electrochemistry ...
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(2004)A potentiometric all-solid-state type ion-selective electrode (ISE) for NO3 - was constructed and characterized. It is based on a mixture of tetra-decyl-ammonium nitrate (TDAN) as ionophore, di-butyl phthalate (DBP) as ...
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(Ediciones Doyma, S.L., 2004)Introduction and objective. Carvedilol is an antioxidant and adrenergic antagonist with demonstrated benefits in terms of mortality from heart failure (HF). The aim of the present study was to evaluate clinical parameters, ...
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(Swets en Zeitlinger B.V., 1996)The antipyretic and antiinflammatory properties of the infusions and methanol extracts of the whole plant of Cuscuta chilensis Ker-Gawl. and of the aerial parts of Cestrum parqui L'Hérit. and Psoralea glandulosa L. were ...
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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 ...
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(2003)Detection of singlet molecular oxygen, O2(1Δ g), by phosphorescence emission, λ = 1270 nm, following laser excitation was employed to measure the quantum yield of O2( 1δg) generation by the antimalaric drugs quinine, ...
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(2005)The synthesis of a new class of angular tetracyclic quinones is described. Our strategy involves Diels-Alder reaction of pyrroloquinolinequinone 9, generated in situ from pyrroloquinoline 8, and dienes. The required ...
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(2005)1,4-dihydropyridine derivatives constitute an important pharmacological group for the treatment of cardiovascular diseases. We have synthesised a series 4-(5′-nitro-2′-furyl)-1,4-dihydropyridine derivatives, which were ...