Browsing by Issue Date Artículos de revistas
Now showing items 1061-1080 of 2801
-
(Sociedad Chilena de la Ciencia del Suelo, 2004)El el Proyecto FONDEF DO111034 "Desarrollo de prácticas sustentables de reciclaje de biosólidos en plantaciones forestales", se está estudiando una salida viable y benéfica a este lodo aplicándolo en bosques en 3 Regiones ...
-
(ROYAL SOC CHEMISTRY, 2004)Photoreduction of 5,6-dimethoxy-, 5-methoxy- and 2,3-dihydro-7H-dibenzo[de, h] quinolin-7-one (A) by tertiary amines in oxygen-free solutions generates long-lived semi-reduced metastable photoproducts, A - NH-, via a ...
-
(Sociedad Chilena de la Ciencia del Suelo, 2004)Para determinar el impacto en suelos forestales del reciclaje de residuos, lodos cloacales o biosólidos, aserrín y corteza, se evalúa residuos a utilizar, suelos, agua y la biomasa vegetal, a través de mediciones de ...
-
-
(ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2004-01)We reported earlier that the production of 0 antigen lipopolysaccharide (LPS) by Salmonella enterica serovar Typhi (Salmonella typhi) increases at the onset of stationary phase and correlates with a growth-regulated ...
-
(AOAC INTERNATIONAL, 2004-01)This stability of Sb(Ill) and Sb(V) species was studied during,single extraction from soils by water. EDTA, diluted H2SO4 and H3PO4, and oxalic acid/oxalate solutions, with and without ascorbic acid, were used as stabilizing ...
-
(ELSEVIER SCIENCE BV, 2004-01)The aim of this work was to evaluate the possibility of using mixtures and/or polyelectrolyte complexes from both chitosan-alginate and chitosan-carrageenan as prolonged drug release systems. Different dissolution profiles ...
-
(ELSEVIER SCIENCE, 2004-01-15)PA-824 (2-nitro-6-(4-trifluoromethoxy-benzyloxy)-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine) is being tested as antituberculosis drug. Little is known on the action mechanism of PA-824; however the reduction of the nitro ...
-
Polymorphism in gene coding for ACE determines different development of myocardial fibrosis in rats (AMER PHYSIOLOGICAL SOC, 2004-02-01)In humans, the effect of angiotensin-converting enzyme (ACE) gene polymorphisms in cardiovascular disease is still controversial. In the rat, a microsatellite marker in the ACE gene allows differentiation of the ACE gene ...
-
(GEORG THIEME VERLAG KG, 2004-02-18)The syntheses of 2-(2-nitrophenyl)-1-benzoyl-1H-benzimidazole derivatives 5-9 and their reduction to the corresponding 2-benzimidazoylbenzamides 10-13 are described. Compounds 10-13 were cleanly and efficiently converted ...
-
On the reduction of 4-oxo-4H-benzopyran-3-carbaldehydes: Global and local electrophilicity patternse (SOCIEDAD CHILENA DE QUIMICA, 2004-03)The theoretical global and local electrophilicity patterns of substituted and chelated 4-oxo-4H-benzopyran-3-carbaldehydes (formylchromones) have been evaluated using the electrophilicity index proposed by Parr et al [J. ...
-
(ELSEVIER SCIENCE BV, 2004-03)The appropriate experimental conditions of Mo(VI) ion transport across a supported liquid membrane containing Alamine 336 as the mobile carrier dissolved in kerosene solvent have been investigated. The molybdenum flux has ...
-
(SOCIEDAD CHILENA DE QUIMICA, 2004-03)Using QSRR modelling, an E index was designed based on the H. P. Schultz MTI index. The E index is a molecular descriptor consisting of a vector and adjacent and distant matrices. Linear regressions were obtained by means ...
-
(SOCIEDAD CHILENA DE QUIMICA, 2004-03)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 ...
-
(KLUWER ACADEMIC/PLENUM PUBL, 2004-03)The final pyridine derivatives were separated and identified by gas chromatography/ mass spectrometry (GC-MS). The intermediates, anion dihydropyridine and the HO2./HO2- species, were observed from voltammetric studies and ...
-
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2004-03-15)Although it is well established that both follicular assembly and the initiation of follicle growth in the mammalian ovary occur independently of pituitary hormone support, the factors controlling these processes remain ...
-
(ROYAL SOC CHEMISTRY, 2004-03-21)The reduction of several nitrobenzenes bearing electron-donor and electron-withdrawing substituents in the 4-position by triethylamine in acetonitrile was studied by cyclic voltammetry, EPR spectroscopy, and steady-state ...
-
(TAYLOR & FRANCIS AS, 2004-04)The cerebrospinal fluid (CSF) is in direct contact with the extracellular space of the CNS, thus biochemical processes in the CNS could potentially be reflected in the CSF. Changes in extracellular matrix (ECM) proteins ...
-
(WILEY-V C H VERLAG GMBH, 2004-04)Spectroelectrochemical and HPLC characterization of the electrochemical oxidation in aqueous medium of a series of six N-1 and C-4 substituted 1,4-dihydropyridines is presented. Based on the analysis of spectra obtained ...
-
(WILEY-V C H VERLAG GMBH, 2004-05)New 5-(2-arylethenyl)-1,2,4-triazine N-oxide and N,N'-dioxide derivatives were synthesized in order to obtain compounds as selective hypoxic cell cytotoxins. The desired products were obtained when the 5-methyl heterocycle ...