Redox Mediator
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Cocoa Agro-Industrial Residue (Theobroma cacao) as Inducer of the Production of Fungal Laccase and Kojic Acid for Application in the Biodegradation of 17-α-Ethinylestradiol
Due to the ability to catalyze the oxidation of several substrates, the enzyme laccase has been used in several applications, among them the bioremediation of emerging pollutants. This work evaluate the capacity of the cocoa agro-industrial residue to induce the production of Pycnoporus sanguineus laccase and to apply the enzymatic extract in the biodegradat
J. Braz. Chem. Soc.. Publicado em: 2020-10
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2. ESTRATÉGIAS E MATERIAIS UTILIZADOS EM FOTOCATÁLISE HETEROGÊNEA PARA GERAÇÃO DE HIDROGÊNIO ATRAVÉS DA FOTÓLISE DA ÁGUA
Among the various technologies for the production of hydrogen fuel, heterogeneous photocatalysis is one of the most promising, especially with the use of semiconductors, notably TiO2. However, the use of TiO2 is limited by hindrances for the photolysis of water, such as wide bandgap, a less negative conduction band reduction potential as compared to that of
Quím. Nova. Publicado em: 2017-06
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3. INFLUENCE OF THE APPLIED ORGANIC LOAD (OLR) ON TEXTILE WASTEWATER TREATMENT USING SUBMERGED ANAEROBIC MEMBRANE BIOREACTORS (SAMBR) IN THE PRESENCE OF REDOX MEDIATOR AND POWDERED ACTIVATED CARBON (PAC)
Abstract This paper evaluated the treatment of textile wastewater in submerged anaerobic membrane bioreactors (SAMBR) operated on a bench scale. Particularly, the influence of operational conditions, such as the applied organic rate (OLR) and the dilution factor (for toxicity attenuation) of the textile wastewater, was evaluated on color and organic matter r
Braz. J. Chem. Eng.. Publicado em: 2016-12
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4. Size Reduced Iron Nitroprusside Particles: an Electrochemical Mediator for the Quantification of Peroxodisulfate and Nitrite
Iron nitroprusside (FeNP) particles have been synthesized from drop by drop (n-FeNP) and bulk mixing (BM) (b-FeNP) methods. FeNP particles obtained from both methods were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). n-FeNP particles were used in constructing modified carbon paste electrode (CPE), which has been further
J. Braz. Chem. Soc.. Publicado em: 2015-03
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5. Applicability of anthraquinone-2,6-disulfonate (AQDS) to enhance colour removal in mesophilic UASB reactors treating textile wastewater
This work assessed the applicability of the redox mediator anthraquinone-2,6-disulfonate (AQDS) to enhance colour removal in mesophilic UASB reactors treating textile wastewater under different operational conditions, such as different electron donor (ethanol) concentrations and different HRT. The anaerobic reactors were able to remove reasonably well the co
Brazilian Journal of Chemical Engineering. Publicado em: 2011-12
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6. Descoloração redutiva de corantes azo e o efeito de mediadores redox na presença do aceptor de elétrons sulfato
We investigated the impact of sulphate and the redox mediator Anthraquinone-2,6-disulfonate (AQDS) on the decolorization of the azo dyes Congo Red (CR) and Reactive Black 5 (RB5). In anaerobic reactors free of extra sulphate dosage, the color removal efficiency decreased drastically when the external electron donor ethanol was removed. In presence of an extr
Química Nova. Publicado em: 2010
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7. RemoÃÃo de cor de corantes de efluentes sintÃtico e real em sistemas anaerÃbios de um e dois estÃgios suplementados ou nÃo com doador de elÃtrons e mediador redox / Colour removal of dyes from synthetic and real effluents in one- and two-stage anaerobic systems supplemented or not with electrons donor and redox mediator
O descarte de efluentes tÃxteis em Ãguas superficiais representa um sÃrio problema ambiental e de saÃde pÃblica devido, principalmente, à presenÃa de corantes na sua composiÃÃo, muitos dos quais sÃo potencialmente tÃxicos e carcinogÃnicos. A remoÃÃo de cor desses compostos ainda à uma das maiores dificuldades enfrentadas pelas estaÃÃes de tr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/06/2009
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8. Graphite Functionalized in Conditions of Friedel-Crafts Reaction mediated by Radiation of Microwave: New Material for Construction of Electrodes of Carbon Paste / Grafite funcionalizada em condições de Friedel-Crafts mediada por radiação de microondas: novo material para construção de eletrodos de pasta de carbono
Modification and/or functionalization of eletrodic materials have been investigated in order to improve the application of chemically modified electrode (CME) regards on their sensitivity, selectivity and reactivity comparing with unmodified substrate. However, the stability and reproducibility of these CME are one of the most important goals to achieve main
Publicado em: 2007
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9. Oxido misto de SiO2/SnO2,SiO2/SnO2/Fosfato : propriedades e aplicações / The SiO2/SnO2, SiO2/SnO2/fosfato mixed oxide : properties and applications
The present work describes the preparation of SiO2/SnO2 mixed oxide obtained by the sol-gel processing method with Sn compositions (in wt %) of 4, 13 and 18%. The high specific surface and the presence of Lewis and Brfnsted acid sites, constitutes an interesting substrate for preparing new classes of chemically modified electrodes. In a specific application,
Publicado em: 2005
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10. Comportamento eletroquimico de alguns compostos organicos eletroativos imobilizados em suportes inorganicos visando o desenvolvimento de sensores para NADH
Inorganic matrices modified with niobium oxide or niobium phosphate, obtained for gel and sol-gel processes, which were denominated as: (SN, SNP, SNsol-gel e SNPsol-gel), were employed in this work. The SN and SNsol-gel materials presented 1400 and 1600 mmol Nb/g of material, respectively; while 1100 and 780 mmol P/g of material for SNP and SNPsol-geI. These
Publicado em: 2003
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11. Construção e avaliação de biossensor amperometrico para salicilato usando salicilato hidroxilase imobilizada em matriz de polipirrol com glutaraldeido
This thesis describes the construction of a biosensor for the salicylate determination in blood serum, based on the enzyme salicylate hydroxylase (EC 1.14.13.1), which was electrochemically immobilized onto a polypyrrole polymeric support with glutaraldehyde, to improve the biosensor lifetime, employing a glassy carbon-working electrode as sensor base. The h
Publicado em: 1999
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12. Produção e caracterização parcial de um composto de baixa massa molecular com atividade fenoloxidasica, de Thermoascus aurantiacus
This work involves the phenoloxidase activity (POx) production by the thermophilic fungus Thermoascus auralltiacus. The best conditions for POx activity production in liquid culture were determined. The addition of lignocellulosic and polyssacharides substrates to culture induced high leveI POx activity. The best substrate was the wheat bran which induced be
Publicado em: 1995