Congo Red Dyes
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. Effect of dye structure and redox mediators on anaerobic azo and anthraquinone dye reduction
We investigated the biological decolourisation of dyes with different molecular structures. The kinetic constant values (k1) achieved with azo dye Reactive Red 120 were 7.6 and 10.1 times higher in the presence of RM (redox mediators) AQDS and riboflavin, respectively, than the assays lacking RM. The kinetic constant achieved with the azo dye Congo Red was 4
Química Nova. Publicado em: 2012
-
2. Mycoremediation of Congo red dye by filamentous fungi
Azo, anthroquinone and triphenylmethane dyes are the major classes of synthetic colourants, which are difficult to degrade and have received considerable attention. Congo red, a diazo dye, is considered as a xenobiotic compound, and is recalcitrant to biodegradative processes. Nevertheless, during the last few years it has been demonstrated that several fung
Braz. J. Microbiol.. Publicado em: 2011-12
-
3. Aspectos QuÃmicos e BiolÃgicos Envolvidos na RemoÃÃo de Cor de Corantes TÃxteis sob CondiÃÃes AnaerÃbias na PresenÃa de Mediadores Redox / CHEMICAL AND BIOLOGICAL ASPECTS INVOLVED IN COLOR REMOVAL OF TEXTILE DYES UNDER ANAEROBIC CONDITIONS IN THE PRESENCE OF THE REDOX MEDIATORS
Nesta pesquisa, foram realizados experimentos em batelada e em fluxo contÃnuo com o objetivo de esclarecer diversos aspectos quÃmicos e biolÃgicos envolvidos no processo de remoÃÃo de cor de corantes tÃxteis sob condiÃÃes anaerÃbias na presenÃa de mediadores redox. Os testes em batelada possibilitaram a avaliaÃÃo do efeito de diferentes substrato
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/11/2010
-
4. 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
-
5. Estudo da descoloração e degradação de corantes azo mediante processo oxidativo avançado: UV/H2O2 / Study of decolorization and degradation of azo dyes by advanced oxidative process : UV/H2O2
Este estudo teve como objetivo o uso de Processos Oxidativos Avançados (POA\ s), para a descoloração e degradação dos corantes azo (Congo Red) e (Acid Yellow 42) em solução aquosa, sendo realizado em escala de bancada (processo batelada), utilizando-se reator tubular. Utililizou-se o Processo Oxidativo Avançado UV/H2O2, avaliando a influência dos se
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2009
-
6. 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
-
7. Aqueous Congo Red degradation induced by plasma with glow discharge electrolysis / Degradação do corante Vermelho Congo em solução aquosa através de plasma obtido por eletrólise de alta tensão
Due to the concern with environmental impact and the need for the use of dyes for the textile industries, during the last years several studies has been undertaken to develop new technologies for energetic treatments that allow the degradation of compounds present in industrial waste. In this present work, the construction of a system for degradation of orga
Publicado em: 2009
-
8. Estudo dos mecanismos de fotodegradação de corantes sobre dióxido de titânio através de técnicas de espectroscopia Raman intensificadas / Study of photodegradation mechanisms of dyes on titanium dioxide through techniques of Raman spectroscopy intensified
The use of spectroscopic techniques for the study of environmental questions is a research area has been experiencing important developments in recent years. These techniques embrace intensified spectroscopic methods, which offer great sensibility and selectivity for the detection of chemical species in low concentrations. In this work, we propose the introd
Publicado em: 2005
-
9. Biodegradation of azo and heterocyclic dyes by Phanerochaete chrysosporium.
Biodegradation of Orange II, Tropaeolin O, Congo Red, and Azure B in cultures of the white rot fungus, Phanerochaete chrysosporium, was demonstrated by decolarization of the culture medium, the extent of which was determined by monitoring the decrease in absorbance at or near the wavelength maximum for each dye. Metabolite formation was also monitored. Decol
-
10. Porphyrin binding by the surface array virulence protein of Aeromonas salmonicida.
Congo red binding by virulent A-layer-containing (A+) and avirulent A-layer-deficient (A-) strains of Aeromonas salmonicida was examined. Congo red binding to A+ cells was enhanced by salt and thus hydrophobically driven, but at low Congo red concentrations binding was salt independent. Congo red was bound by A+ cells by a kinetically distinct mechanism (Kd,
-
11. Effect of Calcofluor white and Congo red on fungal cell wall morphogenesis: in vivo activation of chitin polymerization.
Calcofluor White (a fluorochrome dye) affected the growth of Geotrichum lactis by causing lysis of cells at the hyphal tips. This effect was prevented by the presence of an osmotic stabilizer. The growth of Saccharomyces cerevisiae was also affected, and multicellular aggregates were formed because of incomplete separation of mother and daughter cells; fluor
-
12. CONGO RED DICHROISM WITH DISPERSED AMYLOID FIBRILS, AN EXTRINSIC COTTON EFFECT*
The spectral absorption, optical rotatory dispresion, and circular dichroism associated with interaction of Congo red dye with partly purified suspensions of amyloid fibril fragments were examined. A set of phenomena consistent with a Cotton effect was found. A nearly identical set of phenomena was obtained with poly-L-lysine in its α-helical form. The dich