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Mostrando ítems 11-20 de 27
Photochemistry of single particles using acoustic levitation coupled with Raman microspectrometry
(John Wiley & Sons Ltd, 2017-08)
The photoreactivity of single particles with atmospheric interest was studied by using an acoustic levitation system coupled to Raman microspectrometry. Both, inorganic and organic single particle phototransformation has ...
Mechanistic studies of the photochemical rearrangement of 1-oxolongipin-2-ene derivatives
(Pergamon-Elsevier Science Ltd, 2002-03)
Ultraviolet irradiation of (4R,5S,7S,8R,9S,10R,11R)-7,8,9-triacetyloxy-1-oxolongipin-2-ene (2) afforded the vulgarone A 7 and the pingilonene 8 derivatives as the major products, which were formed by a [1,3]-shift, together ...
Photodegradation of sulfamethoxazole in various aqueous media: Persistence, toxicity and photoproducts assessment
(Pergamon-Elsevier B.V. Ltd, 2009-11-01)
The photochemical transformation of sulfa methoxazole (SMX) was investigated in different water matrices: distilled water (DW), distilled water + nitrate (10 and 20 mg L(-1)) and seawater (SW) to evaluate its persistence, ...
Heterogeneous photochemical reactions of decabromodiphenyl ether
(11/03/2009)
Brominated diphenyl ethers area major class of brominated flame retardants, with production of decabromodiphenyl ether (DBDPE) contributing significantly to this total. Although little is known about the mechanisms and ...
Photodegradation of sulfamethoxazole in various aqueous media: Persistence, toxicity and photoproducts assessment
(Pergamon-Elsevier B.V. Ltd, 2009-11-01)
The photochemical transformation of sulfa methoxazole (SMX) was investigated in different water matrices: distilled water (DW), distilled water + nitrate (10 and 20 mg L(-1)) and seawater (SW) to evaluate its persistence, ...
Conformational Landscape, Photochemistry, and Infrared Spectra of Sulfanilamide
(American Chemical Society, 2013-01)
A combined matrix isolation FTIR and theoretical DFT(B3LYP)/6-311++G(3df,3pd) study of sulfanilamide (SA) was performed. The full conformational search on the potential energy surface of the compound allowed the identification ...
Estudo de degradação da tetraciclina em água e esgoto empregando fotólise direta
(Universidade Tecnológica Federal do ParanáMedianeiraBrasilTecnologia em Gestão AmbientalUTFPR, 2017-06-13)
Emerging pollutants are chemical compounds from a variety of commercial products that can be found in environmental and biological matrices. They are generally not monitored because they have no legal regulations regarding ...
Photochemical persistence of sulfa drugs in aqueous medium: kinetic study and mathematical simulations
(2021-05-01)
This study aimed at investigating the photochemical behavior of sulfa drugs containing five and six-membered heterocyclic substituents (sulfamethoxazole (SMX) and sulfadiazine (SDZ), respectively), in an aqueous medium. ...
Magnetism in photopolymerized fullerenes
(Pergamon-elsevier Science LtdOxfordInglaterra, 2003)
Modulation of the bifunctional CrVI to crIII photoreduction and adsorption capacity in ZrIV and TiIV benchmark metal-organic frameworks
(MDPI, 2021)
The presence of hexavalent chromium water pollution is a growing global concern. Among the currently applied technologies to remove Cr-VI, its adsorption and photocatalytic reduction to Cr-III less mobile and toxic forms ...