Search Results - "Becker, Ralph S"

The Ring-Opening Reaction of Chromenes:  A Photochemical Mode-Dependent Transformation by Migani, Annapaola, Gentili, Pier Luigi, Negri, Fabrizia, Olivucci, Massimo, Romani, Aldo, Favaro, Gianna, Becker, Ralph S

“…The efficiency of the photochemical ring-opening of chromenes (or benzopyrans) depends on the vibronic transition selected by the chosen excitation wavelength…”
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Effects of the Exciting Wavelength and Viscosity on the Photobehavior of 9- and 9,10-Bromoanthracenes by Favaro, Gianna, di Nunzio, Maria R, Gentili, Pier Luigi, Romani, Aldo, Becker, Ralph S

“…The widely investigated photobehaviors of 9-bromo and 9,10-di-bromoanthracenes have been revisited here to clarify the competition among different relaxation…”
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Photochromic Agents as Tools for Protein Structure Study:  Lapachenole Is a Photoaffinity Ligand of Cytochrome P450 3A4 by Gartner, Carlos A., Wen, Bo, Wan, Jiandi, Becker, Ralph S., Jones, Guilford, Gygi, Steven P., Nelson, Sidney D.

“…Cytochrome P450 3A4 is a drug-metabolizing enzyme of extraordinarily broad substrate specificity. This quality imparts upon the enzyme special importance in…”
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Photophysical Behavior of Coumarins as a Function of Substitution and Solvent: Experimental Evidence for the Existence of a Lowest Lying 1(n,.pi.) State by Seixas de Melo, J. Sergio, Becker, Ralph S, Macanita, Antonio L

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Comparative investigation of the photoisomerization of the protonated and unprotonated n-butylamine Schiff bases of 9-cis-, 11-cis-, 13-cis-, and all-trans-retinals by Freedman, Kenn A, Becker, Ralph S

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Effects of solvent, excitation wavelength, and concentration on the photobehavior of some diazonaphthoquinones by Cipolloni, Marco, Gentili, Pier L., Ortica, Fausto, Becker, Ralph S., Favaro, and Gianna

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A comprehensive investigation of the mechanism and photophysics of isomerization of a protonated and unprotonated Schiff base of 11-cis-retinal by Becker, Ralph S, Freedman, Kenn

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Comprehensive Photochemistry and Photophysics of Land- and Marine-based β-carbolines Employing Time-resolved Emission and Flash Transient Spectroscopy by Becker, Ralph S., Ferreira, Luis F. V., Elisei, Fausto, Machado, Isabel, Latterini, L.

“…The photophysical and photochemical behavior of Norharmane (Norh), Harmane (Hara) and Harmine (Hari) and their cations have been examined as a function of the…”
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Comprehensive Investigation of the Photophysical Behavior of Oligopolyfurans by Seixas de Melo, J, Elisei, Fausto, Gartner, Carlos, Aloisi, Gian Gaetano, Becker, Ralph S

“…The photophysical properties of (oligo)polyfurans (Fn, where n = 1−5 represents the number of rings) are presented for the first time for 2−4 rings and…”
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Comprehensive investigation of the photophysics, photochemistry and kinetics of a wide variety of photochromic hydrazones in various solvents by Becker, Ralph S, Chagneau, Frederic

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beta.-Carboline photosensitizers. 1. Photophysics, kinetics and excited-state equilibria in organic solvents, and theoretical calculations by Dias, A, Varela, A. P, Miguel, M. da G, Macanita, A. L, Becker, Ralph S

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Vibronic Quantum Effects in Fluorescence and Photochemistry. Competition between Vibrational Relaxation and Photochemistry and Consequences for Photochemical Control by Becker, Ralph S, Pelliccioli, Anna Paola, Romani, Aldo, Favaro, Gianna

“…In this paper we measured the fluorescence quantum yield (ΦF) and the reaction quantum yield (ΦPC) of a photochromic molecule (flindersine) as a function of…”
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A comprehensive investigation of the photophysics and photochemistry of salicylideneaniline and derivatives of phenylbenzothiazole including solvent effects by Becker, Ralph S, Lenoble, Christian, Zein, Abudi

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Photophysics, photochemistry, kinetics, and mechanism of the photochromism of 6'-nitroindolinospiropyran by Lenoble, Christian, Becker, Ralph S

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Comprehensive absorption, photophysical/chemical, and theoretical study of 2-5-ring aromatic hydrocarbon diones by Becker, Ralph S, Natarajan, L. V

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The visual process: photophysics and photoisomerization of model visual pigments and the primary reaction by Becker, R S

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Photophysics and photochemistry of the nitro derivatives of salicylideneaniline and 2-(2'-hydroxyphenyl)benzothiazole and solvent effects by Becker, Ralph S, Lenoble, Christian, Zein, Abudi

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New concepts in photochemistry and photophysics: Photochromic and other type molecules by Becker, Ralph S., Favaro, Gianna

“…► Equations for dependence of Φ F on vibrational mode and level ( n) excited. ► Experimental Φ PC dependence on vibrational mode and level ( n) excited. ► New…”
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Photobiological Properties of Hydroxy-substituted Flavothiones by Borges, Marta, Romão, Ana, Matos, Olívia, Marzano, Christine, Caffieri, Sergio, Becker, Ralph S., Maçanita, António L.

“…Flavothione (FT) and a series of 18 hydroxy- and methoxy-substituted flavothiones were screened for photobiological activity. The 5-hydroxy–substituted…”
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Photochemistry of Flavothione and Hydroxyflavothiones: Mechanisms and Kinetics by Maçanita, António L., Elisei, Fausto, Aloisi, Gian Gaetano, Ortica, Fausto, Bonifácio, Vasco, Dias, António, Leitão, Emília, Caldeira, Maria João, Maycock, Christopher D., Becker, Ralph S.

“…In this work we present a detailed study of the mechanism of photochemistry and thermal reactions, as well as of the kinetics of flavothione (FLT) in ethanol…”
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