Photochemical Mechanism
Mostrando 1-12 de 64 artigos, teses e dissertações.
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1. Photodegradation of Fluoxetine Applying Different Photolytic Reactors: Evaluation of the Process Efficiency and Mechanism
Photolytic degradation of fluoxetine (FLX), a medicine commonly known as Prozac®, was evaluated by using different photochemical processes. The ultraviolet/microwave (UV/MW) process showed higher efficiency in all the aspects evaluated in this study. The energy consumption was equivalent to 1.94 × 10-4 kW h mg-1 L (UV/MW), while in the UV process the value
J. Braz. Chem. Soc.. Publicado em: 08/04/2019
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2. Photochemical Synthesis of Gold Nanoparticles by Irradiation of Gold Chloride with the 2nd Harmonic of a Nd:YAG Laser
A synthesis method was developed capable of obtaining pristine gold nanoparticles (AuNPs) using the lowest possible amount of auxiliary compounds. An aqueous solution of HAuCl4.3H2O was irradiated, in the absence of any stabilizing species, with the 532-nm radiation of a Nd:YAG laser. Spherical shaped AuNPs were produced by this method with sizes below 10 nm
J. Braz. Chem. Soc.. Publicado em: 2019-04
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3. A Potential Visible-Light NO Releaser: Synthesis, Reactivity and Vasodilator Properties
The cis-[Ru(bpy)2(4-bzpy)(NO)](PF6)3 complex was prepared (4-bzpy = 4-benzoylpyridine), and characterized by UV-visible, infrared and nuclear magnetic resonance (NMR) spectroscopies and electrochemical techniques. The reaction with cysteine was preliminarily investigated, aiming to shed light on the potential biological mechanism for NO or HNO release mediat
J. Braz. Chem. Soc.. Publicado em: 2017-11
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4. Distribution of Xanthene Dyes in DPPC Vesicles: Rationally Accounting for Drug Partitioning Using a Membrane Model
The correct selection of a dye that has effective action as a photosensitizer is a primary concern for successful therapeutic outcomes. The effectiveness of the photodynamic agent is related to both the targeting of cell membranes and the photochemical yield of the chosen dye. The distributions of xanthene derivatives Eosin Y, Erythrosin B, and Rose Bengal B
J. Braz. Chem. Soc.. Publicado em: 2016-11
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5. Is phototridachiahydropyrone a true natural product?
Abstract The occurrence of (−)-phototridachiahydropyrone (5) in nature has been proven. This compound has been now identified as minor component of the extract of marine sacoglossan mollusk Elysia crispata from which the main (−)-tridachiahydropyrone (4) was previously described. Synthetic (±)-5 was formerly obtained by Moses’ group by biomimetic phot
Rev. bras. farmacogn.. Publicado em: 2015-12
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6. Effects of powdery mildew infection on chloroplast and mitochondrial functions in rubber tree
Powdery mildew (Oidium heveae Steinm.) is one of the most important leaf diseases in rubber tree (Hevea brasiliensis). However, physiological and molecular processes associated with the Hevea-powdery mildew interaction are still unclear. In this study, effects of powdery mildew infection on the mitochondrial and chloroplast functions in rubber tree were comp
Trop. plant pathol.. Publicado em: 2014-06
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7. Síntese, citotoxicidade e estudo da relação estrutura-atividade de novas lactonas sesquiterpênicas derivadas da α-santonina / Synthesis, cytotoxicity and structure-activity relationship study of new sesquiterpene lactones derived from α-Santonin
Considering the wide spectrum of biological activities presented by sesquiterpene lactones, the few studies about the correlation structure-biological activity, as well as the limited availability of these compounds in nature, this work aims the synthesis, cytotoxicity and the study of structure-activity relationship of new sesquiterpene lactones derived fro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/12/2010
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8. ESTUDO DO EFEITO DE SUBSTITUINTES NA FOTOQUÍMICA DE TIOXANTONA POR FOTÓLISE POR PULSO DE LASER EM NANOSSEGUNDO / STUDY OF THE EFFECT OF substituents on the photochemical Thioxanthone flash photolysis BY LASER IN nanosecond
By laser flash photolysis, the photo-reactivity of the triplet excited state of thioxanthone derivatives (2BTX, 2MeOTX, 2PrOTX and 2MeTX) was studied. The maximum wavelength and triplet time life of theirs transients are solvent dependents, a blue-shift is observed with the change of no polar to polar middle and still more in hydroxyl solvent. The triplet sp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/06/2010
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9. Estudo das interações entre os fungicidas (carbendazim e fuberidazole) e as partículas de argila em suspensão aquosa. Adsorção, fotofísica e fotoquímica / Study of the interaction between fungicides (carbendazim and fuberidazole) and the clay particles in suspension aqueous. Adsorption, photophysical, photochemical
In the present work, studies on the interaction between the fungicides (carbendazim and fuberidazole) and clay particles in aqueous suspension. It has been studied by isotherm adsorption, UV spectroscopy, emission of fluorescence and X-Ray. The results were fitted according the Langmuir, Freundlich and Dubinin- Radushkevich isotherms indicating a high affini
Publicado em: 2009
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10. Development platform functionalized with poly(4-HBA) for use in biological sensors / Desenvolvimento de plataforma funcionalizada com poli(4-HBA) para aplicação em sensores biológicos
In this work, the 4-hidroxtbenzoic acid electropolymerization was investigated aiming at its application as functionalized platform in biomolecule immobilization in order to develop biological sensors. The material was adsorbed over graphite electrode and electrochemically characterized by cyclic voltammetry and electrochemical impedance spectroscopy. This a
Publicado em: 2009
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11. Nanoparticulas metalicas anisotropicas : mecanismos de formação e aplicações opticas / Anisotropic metal nanoparticles : formation mechanisms and optical applications
Noble metal nanoparticles have attracted a recent renewed interest due to the new scientific and technological applications exploiting their unique optical properties. At nanometric scale, it is well known that the optical response of metals, related to the excitation of surface plasmons, strongly depends not only on the size of the particles but also on the
Publicado em: 2008
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12. Synthesis and study of photoinduced properties of phenothiazine derivatives on biomimetic systems / Síntese e estudo das propriedades fotoinduzidas de derivados fenotiazínicos em sistemas biomiméticos
The effect of interfaces on photophysical and photochemical properties of methylene blue (MB) and its derivatives was studied in this work, aiming to emploit their potencial as photosensitizers (PS) in photodynamic therapy.The presence of MB in SDS solutions affect the micelle equilibrium decreasing the apparent critical micelle concentration of SDS from 7mm
Publicado em: 2008