Browsing by Author "LISSI, E"
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- ItemEFFECTS OF PH AND IONIC MICELLES ON THE RIBOFLAVIN-SENSITIZED PHOTOPROCESSES OF TRYPTOPHAN IN AQUEOUS-SOLUTION(ELSEVIER SCIENCE SA LAUSANNE, 1991) SILVA, E; RUCKERT, V; LISSI, E; ABUIN, EThe effects of pH and ionic micelles on the rates of product formation following irradiation of riboflavin in the presence of tryptophan were investigated by absorption and fluorescence spectroscopy. Under anaerobic conditions, formation of riboflavin-tryptophan adducts was inhibited in acid solutions and by the addition of anionic (sodium dodecylsulphate) and cationic (cetyltrimethylammonium bromide) micelles. The oxidation of tryptophan photoinduced by riboflavin was considerably faster in basic solutions.
- ItemINDOOR HOUSE POLLUTION - APPLIANCE EMISSIONS AND INDOOR AMBIENT CONCENTRATIONS(1983) CACERES, T; SOTO, H; LISSI, E; CISTERNAS, REmission rates for CO, NO, NO2 and CH2O from several unvented gas and kerosene heaters frequently employed in domestic heating were measured. The indoor concentrations generated by these emissions were evaluated and compared to those determined in typical houses. The predicted and measured values exceeded the short term air quality standards accepted in most countries.
- ItemINTERMOLECULAR EXCIMER FORMATION IN POLY(2-NAPHTHYL METHACRYLATE) SOLUTIONS(1982) ZANOCCO, G; ABUIN, E; LISSI, E; GARGALLO, L; RADIC, D
- ItemMICELLAR PROPERTIES OF A POTENTIALLY POLYMERIZABLE ITACONIC ACID-DERIVED SURFACTANT - POTASSIUM DODECYL ITACONATE(1987) LEON, A; ABUIN, E; LISSI, E; GARGALLO, L; RADIC, D
- ItemPHOTO-LUMINESCENCE OF BIPHENYL-CONTAINING POLYMERS(1982) ABUIN, E; LISSI, E; GARGALLO, L; RADIC, D
- ItemPHOTOBEHAVIOR OF PYRENE END-LABELED POLY(ETHYLENE OXIDE) IN METHANOL WATER MIXTURES(1987) ABUIN, E; LISSI, E; GARGALLO, L; RADIC, D
- ItemPHOTOCHEMISTRY AND EMISSION BEHAVIOR OF THE IRON(II) MIXED METALLOCENE COMPLEXES [C5H5FE(ARENE)]PF6, [C5ME5FE(ARENE)]PF6(1988) ROMAN, E; BARRERA, M; HERNANDEZ, S; LISSI, E
- ItemPHOTOREACTIONS OF RIBOFLAVIN WITH SPERMINE AND THEIR ROLE IN TRYPTOPHAN PHOTOCONSUMPTION INDUCED BY RIBOFLAVIN(ELSEVIER SCIENCE SA, 1993) SILVA, E; ALMARZA, C; BERNDT, D; LARRONDO, L; LISSI, EThe influence of spermine (Spr) on riboflavin (Rb) and riboflavin-tryptophan (Rb-Trp) solutions irradiated at 450 nm under aerobic and anaerobic conditions was studied. In both systems, it is shown that Spr interacts with 3Rb probably giving spermine-derived and flavin-derived radicals. In the presence of oxygen, modified Rb is regenerated with the simultaneous production of the active oxygen species O2.- and/or HO2.. The addition of Spr to the Rb-Trp system under aerobic conditions leads to a small protection of Trp consumption, although oxygen consumption is increased. This small protection arises as a consequence of competitive interaction of Trp and Spr with 3Rb. The competition of Spr and oxygen for 3Rb could also explain the autocatalytic oxygen consumption observed in the presence of the amine. Under anaerobic conditions Spr produces a larger protection of Trp consumption, which is compatible with the larger Rb triplet lifetime expected under these conditions.
- ItemPOLYMERIZATION PHOTOINITIATED BY CARBONYL-COMPOUNDS .6. MECHANISM OF BENZIL PHOTOINITIATION(1984) ENCINAS, MV; LISSI, E; RADIC, D; SIGDMAN, R
- ItemPOLYSTYRENE FLUORESCENCE-SPECTRA - MOLECULAR-WEIGHT DEPENDENCE IN DIFFERENT SOLVENTS(1984) ABUIN, E; LISSI, E; GARGALLO, L; RADIC, D
- ItemULTRASONIC DEGRADATION OF POLYVINYLPYRROLIDONE - EFFECT OF PEROXIDE LINKAGES(1980) ENCINA, MV; LISSI, E; SARASUA, M; GARGALLO, L; RADIC, D
- ItemUNUSUAL PHOTO-LUMINESCENT BEHAVIOR OF PHENYL METHACRYLATE COPOLYMERS(1979) LISSI, E; ABUIN, E; GARGALLO, L; RADIC, D