Academic literature on the topic 'Corante índigo carmina'
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Journal articles on the topic "Corante índigo carmina"
L. de Souza Neto, André, Carolina M. Coelho, Felicia M. S. Moreira, José D. Ardisson, Ana Paula F. M. de Urzedo, and Ana Claudia Bernardes-Silva. "Application of Fly Ash in Heterogeneous Fenton Reaction on the Degradation of Indigo Carmine Dye." Revista Virtual de Química 11, no. 3 (2019): 1054–66. http://dx.doi.org/10.21577/1984-6835.20190071.
Full textArenas Rodrigues, Anna Célia, Gustavo Kurachi, Luciana Rodrigues De Meirelles, Carlos Floriano De Morais, Doryane Maria Dos Reis Lima, and Mauro Willemann Bonatto. "ESTUDO DA ACURÁCIA NA AVALIAÇÃO DOS PÓLIPOS ENTRE A COLONOSCOPIA CONVENCIONAL, CROMOSCOPIA COM NARROW-BAND IMAGING E CROMOSCOPIA COM ÍNDIGO CARMIN." FAG JOURNAL OF HEALTH (FJH) 1, no. 4 (December 20, 2019): 17–24. http://dx.doi.org/10.35984/fjh.v1i4.108.
Full textBattistin, Alice, Ana Luisa Sessegolo Marques De Almeida, Reinaldo Simões Gonçalves, Maria Helena Fermino, José Ricardo Pfeifer Silveira, Ângela Cristina Busnello, and Mayara Vendramin Pasquetti. "Germinação das sementes e análise citogenética em duas espécies de palmeiras." Revista Brasileira de Horticultura Ornamental 18, no. 1 (October 18, 2012): 79. http://dx.doi.org/10.14295/rbho.v18i1.696.
Full textDissertations / Theses on the topic "Corante índigo carmina"
Carvalho, Terezinha Elizabeth Mendes de. "Adsorção de corantes aniônicos de solução aquosa em cinza leve de carvão e zeólita de cinza leve de carvão." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29082011-102142/.
Full textCoal fly ash, a waste generated in coal-fired electric power plant, was used to synthesize zeolite by hydrothermal treatment with NaOH solution. The fly ash (CL-2) and this synthesized zeolite (ZM-2) that was characterized as hydroxy-sodalite were used as adsorbents for anionic dyes indigo carmine (IC), and reactive orange 16 (RO16) from aqueous solutions. Effects of contact time, initial dye concentration, pH, adsorbent mass, and temperature were evaluated in the adsorption processes. The kinetics studies indicated that the adsorption followed the pseudo-second order kinetics and that surface adsorption and intraparticle diffusion were involved in the adsorption mechanism. The thermodynamics parameters demonstrated that the adsorption was spontaneous for all adsorption processes. The enthalpy data confirmed the endothermic nature for all adsorption processes except for IC/ZM-2 system which was exothermic. The entropy data showed an increased disorder at the solid/solution interface during the adsorption for all systems except for IC/ZM-2 whose negative entropy value indicated a decreased disorder at the interface. The adsorption isotherms were closely fitted to the Langmuir linear equation. The maximum adsorption capacities were 1.48 mg/g for the IC/CL-2 system; 1.13 mg/g for IC/ZM-2; 0.96 mg/g for RO16/CL-2, and 1.14 mg/g for RO16/ZM-2 at room temperature. The desorption study carried out with water, with acid aqueous solutions, and with an alkali aqueous solution showed to be inefficient both for recovering the dyes and regenerating the adsorbents.
Bolzon, Lucas Bomfim. "Nb2O5 como fotocatalisador para a degradação de índigo de carmina." reponame:Repositório Institucional da UnB, 2007. http://repositorio.unb.br/handle/10482/3071.
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O Nb2O5 foi caracterizado por MEV, área superficial, FTRaman e FTIR. O Estudo de densidade de carga superficial juntamente com o estudo calorimétrico foram necessários para compreender a protonação e a desprotonação da superfície do catalisador em função da variação do pH do meio. O catalisador foi aplicado na fotodegradação do corante índigo de carmina, comparado com TiO2 e ZnO, na qual foi observado que apesar do mesmo apresentar uma cinética de degradação menor, o nióbio pode ser facilmente recuperado e reciclado. No estudo da força iônica, a atividade de fotodegradação do Nb2O5 aumentou até a concentração de 0,05 mol/L e acima deste valor começou a diminuir. O Nb2O5 teve alta atividade fotocatalítica em meio ácido (pH < 4,94 ) devido a protonação da sua superfície que deve interagir melhor com o índigo de carmina. No estudo da reciclagem, o semicondutor manteve a atividade de 80% durante 10 ciclos catalíticos. _________________________________________________________________________________________ ABSTRACT
Nb2O5 has been characterized by SEM, surface area, FTRaman and FTIR. Protonation and deprotonation of catalyst surface caused by changes in pH values were followed by surface charge density and calorimetric studies of this catalyst. The Nb2O5 was applied in the photodegradation of indigo carmine dye, its ability was compared with catalysts TiO2 and ZnO. Nb2O5 presented a degradation lower than other oxides, however, it can be easy recovered and recycled. The activity of Nb2O5 increased with ionic strength up to 0.05 mol/L salt concentration and above this value, photocatalytic activity started to decrease. Nb2O5 showed high activity in acid medium (pH < 4.94), due to this protonated region favors dye interaction. The catalyst was recycled and reused more 9 times and maintained its photocatalytic activity showing 80% of indigo carmine degradation.
Vendruscolo, Cassiane Cheffer. "Utilização de resíduos da produção de farinha de trigo como material adsorvente dos corantes têxteis índigo carmim e azul de metileno." reponame:Repositório Institucional da UCS, 2017. https://repositorio.ucs.br/handle/11338/3376.
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Made available in DSpace on 2017-12-12T15:12:49Z (GMT). No. of bitstreams: 1 dissertacao Cassiane Cheffer Vendruscolo.pdf: 3359659 bytes, checksum: eb37b1f61c88814becd06b7328a44b2c (MD5) Previous issue date: 2017
The use of solid waste as precursor materials for the production of activated carbon is an alternative that, in addition to providing a new destination for these materials, can be applied in the treatment of effluents containing dyes. In this context, the present work aimed to evaluate the adsorption capacity of activated carbon samples prepared from wheat flour production residues. Initially, the residue samples were thermally activated at different temperatures (350 °C, 450 °C, 550 °C and 650 °C) and then chemically activated using hydrogen peroxide. After preparation, activated carbons were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), Thermogravimetric (TG), Scanning Electron Microscopy (SEM) and specific surface area using the Brunauer-Emmett-Teller (BET) method. Activated carbon samples were also evaluated through adsorption studies for the removal of methylene blue cationic dye and indigo carmine anionic dye. FT-IR spectra showed the complete carbonization of the residues of wheat flour production in different activation temperatures. The TG analyzes showed that there were degradation of lignocellulosic materials in the second stage of decomposition. SEM results showed that the structure of the materials has a very heterogeneous morphology, with particles of varied shapes and sizes. In relation to the specific surface area (BET), the largest area found was for the CAS550 sample (296,026 m² g-1). The specific surface area increased with the increase of the activation temperature of the coals, which allowed the material to be activated. It was also observed that the structure of the activated carbons consists, for the most part, of mesopores (pore size > 20 Å). In relation to the adsorption tests using methylene blue as adsorbate, the isotherm that best fit the experimental data was Freundlich. For the tests using indigo carmine as adsorbate, the best fit isotherm was Freundlich, except for coals samples obtained from straw, in which the best fit is the Langmuir isotherm. Among the materials studied, the coal sample with the highest adsorption capacity for methylene blue was activated at 450 °C, where the KF value was 5,569 mg kg-1 for the PF450 coal sample. The KF values for the charcoal samples using indigo carmine were not very satisfactory, however the Adsmax value was 1,667 mg kg-1 for the PAL450 sample. Finally, the activated carbons produced were good adsorbents for the removal of the dyes, especially methylene blue, and could be an alternative for the reuse of waste, minimizing environmental impacts.
Guaraldo, Thais Tasso. "Avaliação da performance de eletrodos de filmes finos de Ti/TiO 2 com diferentes tamanhos de nanopartículas na oxidação fotoeletrocatalítica de Índigo Carmim /." Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/97830.
Full textAbstract: Nanoscience and nanotechnology are scientific-technological fields involved in understanding how structural control of molecular matter level can be used on the preparation of new materials with unique properties. A very promising material for nanotechnology applications is titanium dioxide (TiO2). This work describes the synthesis and characterization of nanostructured TiO2 semiconductor in nanoporous and nanoparticulated materials by the sol-gel method using titanium tetra-isopropoxide [Ti(OPri)4] as a precursor, used as Ti/TiO2 photoanodes in the photoelectrocatalytic process on the degradation of Indigo Carmine (IC) food dye used as a model of organic pollutant. Such materials differ in the hydrolysis step in the sol-gel synthesis that was made in aqueous medium (nanoporous) and in an alcoholic medium (nanoscale).For the preparation of the photoeletrodos titanium foils of 25 cm2 were coated with TiO2 films obtained by the sol-gel method. A sequence of diping, washing and firing at 450 o C for three hours, was performed four times. The characterization of nanostructured Ti/TiO2 semiconductor thin films was made by X-ray powder diffraction (DRX), scanning electron microscopy (SEM), atomic force microscopy (AFM) as well as voltammetric characterization measurements of photocurrent versus potential, flat band potential and determination of adsorption constants. It was possible to determine the particle size of both materials as 20 nm nanoporous and 10 nm nanoparticulated, through the presence of anatase and rutile phases uniformly dispersed, compact, highly TiO2 crystallinity and photoactivity. The best performance of nanoparticulated electrode was notable especially for their smaller particle size and increase in surface area, minimizing the recombination of electron/hole pairs. In photoelectrochemical oxidation the combination of UV irradiation with the application of ... (Complete abstract click electronic access below)
Orientador: Maria Valnice Boldrin Zanoni
Coorientador: Sandra Helena Pulcinelli
Banca: Christiane de Arruda Rodrigues
Banca: Adalgisa Rodrigues de Andrade
Mestre
Guaraldo, Thaís Tasso [UNESP]. "Avaliação da performance de eletrodos de filmes finos de Ti/TiO 2 com diferentes tamanhos de nanopartículas na oxidação fotoeletrocatalítica de Índigo Carmim." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/97830.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A nanociência e nanotecnologia são campos científico-tecnológicos empenhados em compreender como o controle estrutural da matéria ao nível molecular pode ser utilizado para a preparação de novos materiais com propriedades únicas e exclusivas. Um material muito promissor para aplicações nanotecnológicas é o dióxido de titânio (TiO2). Este trabalho descreve a síntese e caracterização de semicondutores nanoestruturados de TiO2 na forma de material nanoporoso e nanoparticulado pelo método sol-gel usando o tetra-isopropóxido de titânio [Ti(OPri)4] como precursor, empregados como fotoanodos de Ti/TiO2 no processo de fotoeletrocatálise visando a degradação do corante alimentício Índigo Carmim (IC) utilizado como modelo de poluente orgânico. Tais materiais se diferenciam pela etapa de hidrólise na síntese do sol-gel que foi feita tanto em meio aquoso (nanoporoso) quanto em meio alcoólico (nanoparticulado). Para a preparação dos fotoeletrodos placas de titânio de 25 cm2 foram recobertas com filmes de TiO2 obtidos pelo método sol-gel. A sequência de deposição por dip-coating, lavagem e calcinação a 450 o C por três horas, foi realizada por quatro vezes. A caracterização dos semicondutores nanoestruturados de filmes finos de Ti/TiO2 foi feita por difração de raios-X, microscopia eletrônica de varredura (MEV), microscopia de força atômica (AFM) e assim como caracterização voltamétrica como medidas de fotocorrente versus potencial, potencial de banda plana e determinação de constantes de adsorção. Foi possível determinar o tamanho de partícula de 20 nm o material nanoporoso e 10 nm o nanoparticulado, pela presença das fases anatásio e rutilo uniformemente dispersas, compactas, com alta cristalinidade do TiO2 e conseqüentemente maior fotoatividade. O desempenho do eletrodo nanoparticulado foi notável, principalmente pelo seu menor...
Nanoscience and nanotechnology are scientific-technological fields involved in understanding how structural control of molecular matter level can be used on the preparation of new materials with unique properties. A very promising material for nanotechnology applications is titanium dioxide (TiO2). This work describes the synthesis and characterization of nanostructured TiO2 semiconductor in nanoporous and nanoparticulated materials by the sol-gel method using titanium tetra-isopropoxide [Ti(OPri)4] as a precursor, used as Ti/TiO2 photoanodes in the photoelectrocatalytic process on the degradation of Indigo Carmine (IC) food dye used as a model of organic pollutant. Such materials differ in the hydrolysis step in the sol-gel synthesis that was made in aqueous medium (nanoporous) and in an alcoholic medium (nanoscale).For the preparation of the photoeletrodos titanium foils of 25 cm2 were coated with TiO2 films obtained by the sol-gel method. A sequence of diping, washing and firing at 450 o C for three hours, was performed four times. The characterization of nanostructured Ti/TiO2 semiconductor thin films was made by X-ray powder diffraction (DRX), scanning electron microscopy (SEM), atomic force microscopy (AFM) as well as voltammetric characterization measurements of photocurrent versus potential, flat band potential and determination of adsorption constants. It was possible to determine the particle size of both materials as 20 nm nanoporous and 10 nm nanoparticulated, through the presence of anatase and rutile phases uniformly dispersed, compact, highly TiO2 crystallinity and photoactivity. The best performance of nanoparticulated electrode was notable especially for their smaller particle size and increase in surface area, minimizing the recombination of electron/hole pairs. In photoelectrochemical oxidation the combination of UV irradiation with the application of ... (Complete abstract click electronic access below)
Legatti, Emerson [UNESP]. "Aplicação e contribuição da cromoendoscopia no trato digestório superior de cães, uilizando Lugol, Índigo Carmim e Azul de Metileno." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/88988.
Full textA Cromoendoscopia é definida como a aplicação tópica de corantes aquosos na mucosa do trato gastrointestinal. Estes corantes evidenciam alterações precoces ou discretas que passariam despercebidas ao exame convencional, permitindo assim a coleta de tecido alterado ou o acompanhamento de doenças pré existentes. Na Medicina Veterinária, não foram encontrados trabalhos que tenham utilizado esta técnica, mas há muitas situações em que ela pode ser empregada como a pesquisa ou o acompanhamento de: esofagites (como esôfago de Barrett em humanos), lesões gástricas erosivas ou polipóides e lesões duodenais. Utilizando os corantes escolhidos, este trabalho teve como objetivos: demonstrar a aplicação da cromoendoscopia em cães e confirmar sua eficácia quanto à identificação e delimitação de lesões no trato digestório superior destes animais; descrever vantagens e desvantagens da cromoendoscopia no direcionamento e aquisição de amostras de biópsia do trato digestório superior de cães; e correlacionar os achados endoscópicos pré e pós aplicação da técnica com os resultados histopatológicos. O estudo utilizou 10 cães adultos provenientes do Canil Municipal de Botucatu, do Canil da UNESP FMVZ Botucatu e da rotina do Hospital Veterinário da UNESP FMVZ Botucatu. Todos os animais realizaram endoscopia digestiva alta (EDA) seguida de Cromoendoscopia (CRE) e coleta de biópsia da mucosa esofágica, gástrica e duodenal, quando acessível. As biópsias foram enviadas para exame histopatológico e identificação de presença ou ausência de lesão no material coletado. Os resultados demonstraram concordância importante na cromoendoscopia (CRE) de esôfago com acurácia de 83,33%. Concordância moderada na endoscopia convencional (E.C.) de esôfago e na CRE de fundo, corpo e antro piloro com acurácia de...
Chromoendoscopy is defined as the topical application of aqueous dye mucosa of the gastrointestinal tract. These dyes show early changes or mild they go unnoticed to the conventional examination, allowing the collection of tissue changes or monitoring pre-existing diseases. In Veterinary Medicine, there were no studies that have used this technique , but there are many situations in which it can be employed as research or monitoring esophagitis (such as humans Barrett's esophagus), erosive or polypoid gastric lesions and duodenal injuries . Using the colors chosen, this work was objectives: to demonstrate the technique of chromoendoscopy in dogs and evaluate its effectiveness as the identification and delineation of chronic or early lesions, often unapparent, in the upper digestive tract these animals; describe advantages and disadvantages of chromoendoscopy in targeting and acquisition of biopsy specimens of the upper digestive tract of dogs, and correlate the endoscopic findings before and after technique application with the histopathologic results. The study used 10 adult dogs from the Botucatu Municipal Kennel, UNESP kennel FMVZ Botucatu and routine FMVZ Veterinary Hospital of UNESP Botucatu. Every animals performed upper endoscopy (EGD) followed by Chromoendoscopy (CRE) and collecting biopsy of the esophageal mucosa, gastric and duodenal when available. Biopsies were sent for examination and identification of pathological presence or absence of lesions in the material collected. The results showed chromoendoscopy (CRE) important concordance of the esophagus with an accuracy of 83.33%. Moderate concordance in conventional endoscopy (CE) of the esophagus and CRE fundus, body and pyloric antrum with an accuracy of 83.33%, 70%, 70% e 70% respectively. Reasonable concordance in CRE... (Complete abstract click electronic access below)
Legatti, Emerson. "Aplicação e contribuição da cromoendoscopia no trato digestório superior de cães, uilizando Lugol, Índigo Carmim e Azul de Metileno /." Botucatu, 2013. http://hdl.handle.net/11449/88988.
Full textCoorientador: Luiz Eduardo Naresse
Banca: Marcos Jun Watanabe
Banca: Érika Veruska Paiva Ortolan
Resumo: A Cromoendoscopia é definida como a aplicação tópica de corantes aquosos na mucosa do trato gastrointestinal. Estes corantes evidenciam alterações precoces ou discretas que passariam despercebidas ao exame convencional, permitindo assim a coleta de tecido alterado ou o acompanhamento de doenças pré existentes. Na Medicina Veterinária, não foram encontrados trabalhos que tenham utilizado esta técnica, mas há muitas situações em que ela pode ser empregada como a pesquisa ou o acompanhamento de: esofagites (como esôfago de Barrett em humanos), lesões gástricas erosivas ou polipóides e lesões duodenais. Utilizando os corantes escolhidos, este trabalho teve como objetivos: demonstrar a aplicação da cromoendoscopia em cães e confirmar sua eficácia quanto à identificação e delimitação de lesões no trato digestório superior destes animais; descrever vantagens e desvantagens da cromoendoscopia no direcionamento e aquisição de amostras de biópsia do trato digestório superior de cães; e correlacionar os achados endoscópicos pré e pós aplicação da técnica com os resultados histopatológicos. O estudo utilizou 10 cães adultos provenientes do Canil Municipal de Botucatu, do Canil da UNESP FMVZ Botucatu e da rotina do Hospital Veterinário da UNESP FMVZ Botucatu. Todos os animais realizaram endoscopia digestiva alta (EDA) seguida de Cromoendoscopia (CRE) e coleta de biópsia da mucosa esofágica, gástrica e duodenal, quando acessível. As biópsias foram enviadas para exame histopatológico e identificação de presença ou ausência de lesão no material coletado. Os resultados demonstraram concordância importante na cromoendoscopia (CRE) de esôfago com acurácia de 83,33%. Concordância moderada na endoscopia convencional (E.C.) de esôfago e na CRE de fundo, corpo e antro piloro com acurácia de... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract:Chromoendoscopy is defined as the topical application of aqueous dye mucosa of the gastrointestinal tract. These dyes show early changes or mild they go unnoticed to the conventional examination, allowing the collection of tissue changes or monitoring pre-existing diseases. In Veterinary Medicine, there were no studies that have used this technique , but there are many situations in which it can be employed as research or monitoring esophagitis (such as humans Barrett's esophagus), erosive or polypoid gastric lesions and duodenal injuries . Using the colors chosen, this work was objectives: to demonstrate the technique of chromoendoscopy in dogs and evaluate its effectiveness as the identification and delineation of chronic or early lesions, often unapparent, in the upper digestive tract these animals; describe advantages and disadvantages of chromoendoscopy in targeting and acquisition of biopsy specimens of the upper digestive tract of dogs, and correlate the endoscopic findings before and after technique application with the histopathologic results. The study used 10 adult dogs from the Botucatu Municipal Kennel, UNESP kennel FMVZ Botucatu and routine FMVZ Veterinary Hospital of UNESP Botucatu. Every animals performed upper endoscopy (EGD) followed by Chromoendoscopy (CRE) and collecting biopsy of the esophageal mucosa, gastric and duodenal when available. Biopsies were sent for examination and identification of pathological presence or absence of lesions in the material collected. The results showed chromoendoscopy (CRE) important concordance of the esophagus with an accuracy of 83.33%. Moderate concordance in conventional endoscopy (CE) of the esophagus and CRE fundus, body and pyloric antrum with an accuracy of 83.33%, 70%, 70% e 70% respectively. Reasonable concordance in CRE... (Complete abstract click electronic access below)
Mestre
Meira, Luís. "Degradação de Corantes Indigoides com Reagente de Fenton para tratamento de efluentes na Industria Têxtil." Master's thesis, 2014. http://hdl.handle.net/10400.26/17078.
Full textThe textile industry generates large amounts of wastewater that, if it’s not treated can contaminate waterways. It is a source of visible pollution and toxic chemicals that disrupt ecosystems. It becomes therefore necessary to find simple and economically viable situations, for the treatment of textile effluents that do not add greater value to the product. It was intended to find optimal conditions for the degradation of a solution of indigo carmine dye with different solvents, by Oxidative Advanced Process, which uses the Fenton reagent. It was observed the behavior of this degradation process, with different ratios between the components of Fenton's reagent, at three different pH values (3, 6 and 11). It was verified that this degradation process grows best at pH 3, and this value can be used with any of the solvents, to yield degradations always higher than 90%. Subsequently it was compared the process of degradation with Fenton reagent and with the dye degradation with the photo-Fenton process At pH 3 the photo-Fenton process improves the reaction yield by decreasing the amount of Fenton reagents necessary to degrade the same amount of dye found in the previous relationship. It was verified that with the foto-Fenton process it is possible to use less amount of Fenton reagents, to degrade the same amount of dye.
Book chapters on the topic "Corante índigo carmina"
Urzedo, Ana Paula Fonseca Maia de, Taynara Mara Vieira, Rodinei Augusti, Kelly Beatriz Vieira Torres Dozinel, Ana Cláudia Bernardes Silva, and Cristiane Medina Finzi Quintão. "APROVEITAMENTO DE RESÍDUOS DA CERVEJA PARA A ADSORÇÃO DO CORANTE ÍNDIGO CARMIM EM EFLUENTE AQUOSO." In Estudos Interdisciplinares nas Ciências Exatas e da Terra e Engenharias 2, 94–104. Atena Editora, 2019. http://dx.doi.org/10.22533/at.ed.648191030910.
Full textConference papers on the topic "Corante índigo carmina"
COELHO, M. G., L. O. SILVA, R. AUGUSTI, G. M. DE LIMA, J. D. ARDISSON, and F. V. DE ANDRADE. "ESTUDO DA ATIVIDADE CATALÍTICA DO PÓ DE OSSO BOVINO IMPREGNADO COM Fe(III): NOVO MATERIAL PARA FOTODEGRADAÇÃO DO CORANTE ÍNDIGO CARMIM." In XX Congresso Brasileiro de Engenharia Química. São Paulo: Editora Edgard Blücher, 2015. http://dx.doi.org/10.5151/chemeng-cobeq2014-1795-17513-181823.
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