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  1 / 1962 MEDLINE  
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[PMID]:29024885
[Au] Autor:Jager D; Kupka D; Vaclavikova M; Ivanicova L; Gallios G
[Ad] Endereço:Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01, Kosice, Slovakia.
[Ti] Título:Degradation of Reactive Black 5 by electrochemical oxidation.
[So] Source:Chemosphere;190:405-416, 2018 Jan.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Degradation of commercial grade Reactive Black 5 (RB5) azo dye by chemical and electrochemical treatment was examined using a dimensionally stable anode and stainless steel cathodes as electrode materials, with NaCl as supporting electrolyte. The electrochemical treatment was compared to the chemical treatment with hypochlorite generated by electrolysis. The compounds present in the commercial grade RB5 azo dye and the products of its electrochemical degradation were separated using ion-pairing high performance liquid chromatography on reversed phase. The separated species were detected by diode array detector and electrospray ionization mass spectrometry. A suitable ion-pairing reversed phase HPLC-MS method with electrospray ionization for the separation and identification of the components was developed. The accurate mass of the parent and fragment ions were used in the determination of the empirical formulas of the components using the first-order mass spectra. Structural formulas of degradation products were proposed using these information and principles of organic chemistry and electrochemistry.
[Mh] Termos MeSH primário: Eletrólise/métodos
Naftalenossulfonatos/química
[Mh] Termos MeSH secundário: Compostos Azo/química
Cromatografia Líquida de Alta Pressão/métodos
Corantes/química
Estrutura Molecular
Peso Molecular
Oxirredução
Espectrometria de Massas por Ionização por Electrospray/métodos
Purificação da Água/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Azo Compounds); 0 (Coloring Agents); 0 (Naphthalenesulfonates); O0HDY58362 (Remazol black B)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171013
[St] Status:MEDLINE


  2 / 1962 MEDLINE  
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[PMID]:28993025
[Au] Autor:Cathey A; Ferguson KK; McElrath TF; Cantonwine DE; Pace G; Alshawabkeh A; Cordero JF; Meeker JD
[Ad] Endereço:Department of Environmental Health Sciences, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA.
[Ti] Título:Distribution and predictors of urinary polycyclic aromatic hydrocarbon metabolites in two pregnancy cohort studies.
[So] Source:Environ Pollut;232:556-562, 2018 Jan.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Pregnant women and their fetuses represent susceptible populations to environmental contaminants. Exposure to polycyclic aromatic hydrocarbons (PAHs) among pregnant women may contribute to adverse birth outcomes such as preterm birth. Multiple previous studies have assessed airborne sources of PAHs among pregnant women but few have measured urinary PAH metabolites which can capture total exposure through multiple routes. The aim of this study was to bridge this knowledge gap by assessing longitudinal urinary PAH metabolite concentrations over two time points in pregnancy cohorts in Boston (N = 200) and Puerto Rico (N = 50) to better understand exposure distributions throughout pregnancy and how they relate to demographic factors. Urine samples were analyzed for 1-NAP, 2-NAP, 2-FLU, 1-PHE, 2,3-PHE, 4-PHE, 9-PHE, and 1-PYR. Concentrations of 2-NAP, 1-PYR, and 4-PHE were higher in Puerto Rico, while all other metabolites were present in higher concentrations in Boston. In Puerto Rico, intraclass correlation coefficients (ICC) were weak to moderate, ranging from 0.06 to 0.42. PAH metabolite concentrations were significantly higher among younger, heavier (except 1-NAP and 9-PHE), and less educated individuals in Boston only. Consistent significant associations between PAH concentrations and measured covariates were not found in Puerto Rico. Our results suggest that potentially important differences in PAH exposure exist between these two populations. Additionally, our results indicate that multiple urinary measurements are required to accurately assess PAH exposure throughout pregnancy.
[Mh] Termos MeSH primário: Poluentes Ambientais/urina
Exposição Materna/estatística & dados numéricos
Hidrocarbonetos Aromáticos Policíclicos/urina
[Mh] Termos MeSH secundário: Adulto
Ácido Aspártico/análogos & derivados
Ácido Aspártico/urina
Biomarcadores/urina
Boston
Estudos de Coortes
Monitoramento Ambiental
Feminino
Seres Humanos
Naftalenossulfonatos/urina
Hidrocarbonetos Aromáticos Policíclicos/análise
Gravidez
Pirróis
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (1-nitro-2-acetylpyrrole); 0 (Biomarkers); 0 (Environmental Pollutants); 0 (Naphthalenesulfonates); 0 (Polycyclic Aromatic Hydrocarbons); 0 (Pyrroles); 141577-40-4 (N-(2-naphthalenesulfonyl)aspartyl-(2-phenethyl)amide); 30KYC7MIAI (Aspartic Acid)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180214
[Lr] Data última revisão:
180214
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171011
[St] Status:MEDLINE


  3 / 1962 MEDLINE  
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[PMID]:28463583
[Au] Autor:Yang SO; Sodaneath H; Lee JI; Jung H; Choi JH; Ryu HW; Cho KS
[Ad] Endereço:a Department of Environmental Science and Engineering , Ewha Womans University , Seoul , Republic of Korea.
[Ti] Título:Decolorization of acid, disperse and reactive dyes by Trametes versicolor CBR43.
[So] Source:J Environ Sci Health A Tox Hazard Subst Environ Eng;52(9):862-872, 2017 Jul 29.
[Is] ISSN:1532-4117
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The mycoremediation has been considered as a promising method for decolorizing dye wastewater. To explore new bioresource for mycoremediation, a new white-rot fungus that could decolorize various dyes commonly used in textile industries was isolated, and its ligninolytic enzyme activity and decolorization capacity were characterized. The isolated CBR43 was identified as Trametes versicolor based on the morphological properties of its fruit body and spores, as well as through partial 18S rDNA gene sequences. Isolated CBR43 displayed high activities of laccase and Mn-dependent peroxidase, whereas its lignin peroxidase activity was relatively low. These ligninolytic enzyme activities in potato dextrose broth (PDB) medium were enhanced by the addition of yeast extract (1-10 g L ). In particular, lignin peroxidase activity was increased more than 5 times in the PDB medium amended with 10 g L of yeast extract. The CBR43 decolorized more than 90% of 200 mg L acid dyes (red 114, blue 62 and black 172) and reactive dyes (red 120, blue 4, orange 16 and black 5) within 6 days in the PDB medium. CBR43 decolorized 67% of 200 mg L acid orange 7 within 9 days. The decolorization efficiencies for disperse dyes (red 1, orange 3 and black 1) were 51-80% within 9 days. The CBR43 could effectively decolorize high concentrations of acid blue 62 and acid black 172 (500-700 mg L ). The maximum dye decolorization rate was obtained at 28°C, pH 5, and 150 rpm in the PDB medium. T. versicolor CBR43 had high laccase and Mn-dependent peroxidase activities, and could decolorize a wide variety of dyes such as acid, disperse and reactive textile dyes. This fungus had decolorizing activities of azo-type dyes as well as anthraquinone-type dyes. T. versicolor CBR43 is one of promising bioresources for the decolorization of textile wastewater including various dyes.
[Mh] Termos MeSH primário: Compostos Azo/análise
Benzenossulfonatos/análise
Complexos de Coordenação/análise
Naftalenossulfonatos/análise
Trametes/crescimento & desenvolvimento
Poluentes Químicos da Água/análise
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Biodegradação Ambiental
Lacase/metabolismo
Peroxidases/metabolismo
Indústria Têxtil
Trametes/enzimologia
Águas Residuais/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Azo Compounds); 0 (Benzenesulfonates); 0 (Coordination Complexes); 0 (Naphthalenesulfonates); 0 (Waste Water); 0 (Water Pollutants, Chemical); 0 (acid black 172); EC 1.10.3.2 (Laccase); EC 1.11.1.- (Peroxidases); EC 1.11.1.13 (manganese peroxidase); Q1LIY3BO0U (2-naphthol orange)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171128
[Lr] Data última revisão:
171128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE
[do] DOI:10.1080/10934529.2017.1316164


  4 / 1962 MEDLINE  
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[PMID]:28945359
[Au] Autor:Mahmoud MM; Schechter A; Alnajjar KS; Huang J; Towle-Weicksel J; Eckenroth BE; Doublié S; Sweasy JB
[Ad] Endereço:Department of Therapeutic Radiology, Yale University School of Medicine , New Haven, Connecticut 06520, United States.
[Ti] Título:Defective Nucleotide Release by DNA Polymerase ß Mutator Variant E288K Is the Basis of Its Low Fidelity.
[So] Source:Biochemistry;56(41):5550-5559, 2017 Oct 17.
[Is] ISSN:1520-4995
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:DNA polymerases synthesize new DNA during DNA replication and repair, and their ability to do so faithfully is essential to maintaining genomic integrity. DNA polymerase ß (Pol ß) functions in base excision repair to fill in single-nucleotide gaps, and variants of Pol ß have been associated with cancer. Specifically, the E288K Pol ß variant has been found in colon tumors and has been shown to display sequence-specific mutator activity. To probe the mechanism that may underlie E288K's loss of fidelity, a fluorescence resonance energy transfer system that utilizes a fluorophore on the fingers domain of Pol ß and a quencher on the DNA substrate was employed. Our results show that E288K utilizes an overall mechanism similar to that of wild type (WT) Pol ß when incorporating correct dNTP. However, when inserting the correct dNTP, E288K exhibits a faster rate of closing of the fingers domain combined with a slower rate of nucleotide release compared to those of WT Pol ß. We also detect enzyme closure upon mixing with the incorrect dNTP for E288K but not WT Pol ß. Taken together, our results suggest that E288K Pol ß incorporates all dNTPs more readily than WT because of an inherent defect that results in rapid isomerization of dNTPs within its active site. Structural modeling implies that this inherent defect is due to interaction of E288K with DNA, resulting in a stable closed enzyme structure.
[Mh] Termos MeSH primário: Neoplasias do Colo/enzimologia
DNA Polimerase beta/metabolismo
Reparo do DNA
Replicação do DNA
DNA/metabolismo
Modelos Moleculares
Mutação
[Mh] Termos MeSH secundário: Substituição de Aminoácidos
Biocatálise
Neoplasias do Colo/genética
DNA/química
DNA Polimerase beta/química
DNA Polimerase beta/genética
Estabilidade Enzimática
Corantes Fluorescentes/química
Seres Humanos
Cinética
Mutagênese Sítio-Dirigida
Naftalenossulfonatos/química
Proteínas de Neoplasias/química
Proteínas de Neoplasias/genética
Proteínas de Neoplasias/metabolismo
Conformação Proteica
Domínios e Motivos de Interação entre Proteínas
Redobramento de Proteína
Proteínas Recombinantes/química
Proteínas Recombinantes/metabolismo
Especificidade por Substrato
p-Dimetilaminoazobenzeno/análogos & derivados
p-Dimetilaminoazobenzeno/química
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fluorescent Dyes); 0 (Naphthalenesulfonates); 0 (Neoplasm Proteins); 0 (Recombinant Proteins); 6268-49-1 (4-(4-dimethylaminophenylazo)benzoic acid); 9007-49-2 (DNA); A49L8E13FD (p-Dimethylaminoazobenzene); EC 2.7.7.- (DNA Polymerase beta)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171026
[Lr] Data última revisão:
171026
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170926
[St] Status:MEDLINE
[do] DOI:10.1021/acs.biochem.7b00869


  5 / 1962 MEDLINE  
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[PMID]:28886479
[Au] Autor:Waghorn PA; Oliveira BL; Jones CM; Tager AM; Caravan P
[Ad] Endereço:Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02129, United States.
[Ti] Título:High sensitivity HPLC method for determination of the allysine concentration in tissue by use of a naphthol derivative.
[So] Source:J Chromatogr B Analyt Technol Biomed Life Sci;1064:7-13, 2017 Oct 01.
[Is] ISSN:1873-376X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Common to all fibrotic and metastatic diseases is the uncontrollable remodeling of tissue that leads to the accumulation of fibrous connective tissue components such as collagen and elastin. Build-up of fibrous tissue occurs through the cross-linking of collagen or elastin monomers, which is initiated through the oxidation of lysine residues to form α-aminoadipic-δ-semialdehyde (allysine). To provide a measure of the extent of collagen oxidation in disease models of fibrosis or metastasis, a rapid, sensitive HPLC method was developed to quantify the amount of allysine present in tissue. Allysine was reacted with sodium 2-naphthol-7-sulfonate under conditions typically applied for acid hydrolysis of tissues (6M HCl, 110°C, 24h) to prepare AL-NP, a fluorescent bis-naphthol derivative of allysine. High performance liquid chromatography was applied for analysis of allysine content. Under optimal reaction and detection conditions, successful separation of AL-NP was achieved with excellent analytical performance attained. Good linear relationship (R =0.994) between peak area and concentration for AL-NP was attained for 0.35-175pmol of analyte. A detection limit of 0.02pmol in the standard sample with a 20µL injection was achieved for AL-NP, with satisfactory recovery from 88 to 100% determined. The method was applied in the quantification of allysine in healthy and fibrotic mouse lung tissue, with the fibrotic tissue showing a 2.5 fold increase in the content of allysine.
[Mh] Termos MeSH primário: Ácido 2-Aminoadípico/análogos & derivados
Cromatografia Líquida de Alta Pressão/métodos
Naftalenossulfonatos/química
[Mh] Termos MeSH secundário: Ácido 2-Aminoadípico/análise
Animais
Aorta/química
Bleomicina/efeitos adversos
Hidrólise
Limite de Detecção
Modelos Lineares
Pulmão/química
Camundongos
Camundongos Endogâmicos C57BL
Fibrose Pulmonar/induzido quimicamente
Fibrose Pulmonar/metabolismo
Reprodutibilidade dos Testes
Suínos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Naphthalenesulfonates); 11056-06-7 (Bleomycin); 1K7B1OED4N (2-Aminoadipic Acid); 425I4Y24YZ (allysine)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171101
[Lr] Data última revisão:
171101
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170909
[St] Status:MEDLINE


  6 / 1962 MEDLINE  
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[PMID]:28800558
[Au] Autor:Martinez CM; Zhu X; Logan BE
[Ad] Endereço:Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
[Ti] Título:AQDS immobilized solid-phase redox mediators and their role during bioelectricity generation and RR2 decolorization in air-cathode single-chamber microbial fuel cells.
[So] Source:Bioelectrochemistry;118:123-130, 2017 Dec.
[Is] ISSN:1878-562X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The application of immobilized redox mediators (RMs) in microbial fuel cells (MFCs) is an emerging technology for electricity generation with simultaneous azo dye decolorization due to facilitated electrons transfer from bacteria to anodes and azo dyes. The use of immobilized RMs avoids the requirement of their continuous dosing in MFCs, which has been the main limitation for practical applications. Two strategies of anthraquinones-2,6-disulphonic salt (AQDS) immobilization, AQDS immobilized with polyvinyl alcohol particles and AQDS immobilized on anodes by electropolymerization, were evaluated and compared to achieve simultaneous reactive red 2 (RR2) dye reduction and bioelectricity generation. The AQDS immobilized by electropolymerization showed the highest power density (816±2mW/m ) and extent of RR2 decolorization (89±0.6%). This power density is one of the highest values yet achieved in the presence of a recalcitrant pollutant, suggesting that immobilization was important for enabling current generation in the presence of RR2.
[Mh] Termos MeSH primário: Ar
Antraquinonas/química
Fontes de Energia Bioelétrica
Naftalenossulfonatos/química
Triazinas/química
[Mh] Termos MeSH secundário: Cor
Condutividade Elétrica
Eletrodos
Naftalenossulfonatos/toxicidade
Oxirredução
Álcool de Polivinil/química
Triazinas/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (2,6-disulfonic acid anthraquinone); 0 (Anthraquinones); 0 (Naphthalenesulfonates); 0 (Triazines); 0 (reactive red 2); 9002-89-5 (Polyvinyl Alcohol)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170927
[Lr] Data última revisão:
170927
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170812
[St] Status:MEDLINE


  7 / 1962 MEDLINE  
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[PMID]:28586651
[Au] Autor:Khalik WF; Ho LN; Ong SA; Voon CH; Wong YS; Yusoff N; Lee SL; Yusuf SY
[Ad] Endereço:Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, Arau, Perlis, 02600, Malaysia.
[Ti] Título:Optimization of degradation of Reactive Black 5 (RB5) and electricity generation in solar photocatalytic fuel cell system.
[So] Source:Chemosphere;184:112-119, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The photocatalytic fuel cell (PFC) system was developed in order to study the effect of several operating parameters in degradation of Reactive Black 5 (RB5) and its electricity generation. Light irradiation, initial dye concentration, aeration, pH and cathode electrode are the operating parameters that might give contribution in the efficiency of PFC system. The degradation of RB5 depends on the presence of light irradiation and solar light gives better performance to degrade the azo dye. The azo dye with low initial concentration decolorizes faster compared to higher initial concentration and presence of aeration in PFC system would enhance its performance. Reactive Black 5 rapidly decreased at higher pH due to the higher amount of OH generated at higher pH and Pt-loaded carbon (Pt/C) was more suitable to be used as cathode in PFC system compared to Cu foil and Fe foil. The rapid decolorization of RB5 would increase their voltage output and in addition, it would also increase their V , J and P . The breakage of azo bond and aromatic rings was confirmed through UV-Vis spectrum and COD analysis.
[Mh] Termos MeSH primário: Fontes de Energia Elétrica
Eletricidade
Naftalenossulfonatos/química
Processos Fotoquímicos
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Compostos Azo/química
Corantes/química
Eletrodos
Luz
Luz Solar
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Azo Compounds); 0 (Coloring Agents); 0 (Naphthalenesulfonates); 0 (Water Pollutants, Chemical); O0HDY58362 (Remazol black B)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171026
[Lr] Data última revisão:
171026
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170607
[St] Status:MEDLINE


  8 / 1962 MEDLINE  
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[PMID]:28549328
[Au] Autor:Chu KH; Ye L; Wang W; Wu D; Chan DKL; Zeng C; Yip HY; Yu JC; Wong PK
[Ad] Endereço:School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
[Ti] Título:Enhanced photocatalytic hydrogen production from aqueous sulfide/sulfite solution by ZnO S with simultaneous dye degradation under visible-light irradiation.
[So] Source:Chemosphere;183:219-228, 2017 Sep.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Photocatalytic hydrogen (H ) production was performed by visible-light-driven (VLD) ternary photocatalyst, zinc oxysulfide (ZnO S ) in the presence of sulfide/sulfite (S /SO ) sacrificing system, with simultaneous azo-dye Reactive Violet 5 (RV5) degradation. Enhancement in both RV5 degradation and H production was achieved, with the promotion of H production after decolorization of RV5. The effect of initial concentration of RV5 was found to be influential on the enhancement of H during the simultaneous processes, with a maximum of 110% increase of H produced. The mechanism of the simultaneous system was investigated by scavenger study and intermediate analysis, including Fourier transform-infrared (FTIR) spectroscopy and total organic carbon (TOC) analysis. It was confirmed that the partial degradation of RV5 and presence of dynamic organic intermediates contributed to the enhancement in H production. The present study revealed the feasibility of developing VLD photocatalysis as a sustainable and environmentally friendly technology for concurrent organic pollutant degradation with energy generation.
[Mh] Termos MeSH primário: Hidrogênio/análise
Luz
Naftalenossulfonatos/análise
Sulfetos/química
Sulfitos/química
Poluentes Químicos da Água/análise
Purificação da Água/métodos
Compostos de Zinco/química
[Mh] Termos MeSH secundário: Catálise
Concentração de Íons de Hidrogênio
Naftalenossulfonatos/efeitos da radiação
Processos Fotoquímicos
Poluentes Químicos da Água/efeitos da radiação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Naphthalenesulfonates); 0 (Sulfides); 0 (Sulfites); 0 (Water Pollutants, Chemical); 0 (Zinc Compounds); 12226-38-9 (C.I. Reactive Violet 5); 7YNJ3PO35Z (Hydrogen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171003
[Lr] Data última revisão:
171003
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170527
[St] Status:MEDLINE


  9 / 1962 MEDLINE  
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[PMID]:28391928
[Au] Autor:Mook WT; Ajeel MA; Aroua MK; Szlachta M
[Ad] Endereço:Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: mookweitze@yahoo.com.my.
[Ti] Título:The application of iron mesh double layer as anode for the electrochemical treatment of Reactive Black 5 dye.
[So] Source:J Environ Sci (China);54:184-195, 2017 Apr.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:In this work a novel anode configuration consisting of an iron mesh double layer is proposed for the electrochemical treatment of wastewater. The removal of Reactive Black 5 dye (RB5) from synthetic contaminated water was used as a model system. At a constant anode surface area, identical process operating parameters and batch process mode, the iron mesh double layer electrode showed better performance compared to the conventional single layer iron mesh. The double layer electrode was characterized by RB5 and chemical oxygen demand (COD) removal efficiency of 98.2% and 97.7%, respectively, kinetic rate constant of 0.0385/min, diffusion coefficient of 4.9×10 cm /sec and electrical energy consumption of 20.53kWh/kg . In the continuous flow system, the optimum conditions suggested by Response Surface Methodology (RSM) are: initial solution pH of 6.29, current density of 1.6mA/cm , electrolyte dose of 0.15g/L and flow rate of 11.47mL/min which resulted in an RB5 removal efficiency of 81.62%.
[Mh] Termos MeSH primário: Técnicas Eletroquímicas/métodos
Naftalenossulfonatos/química
Eliminação de Resíduos Líquidos/métodos
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Eletrodos
Ferro/química
Cinética
Águas Residuais/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Naphthalenesulfonates); 0 (Waste Water); 0 (Water Pollutants, Chemical); E1UOL152H7 (Iron); O0HDY58362 (Remazol black B)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170421
[Lr] Data última revisão:
170421
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170411
[St] Status:MEDLINE


  10 / 1962 MEDLINE  
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[PMID]:28372763
[Au] Autor:Martorell MM; Pajot HF; Ahmed PM; de Figueroa LI
[Ad] Endereço:Antarctic Argentinian Institute, Balcarce 290, CABA, Argentina. Electronic address: marmartorellsaez@gmail.com.
[Ti] Título:Biodecoloration of Reactive Black 5 by the methylotrophic yeast Candida boidinii MM 4035.
[So] Source:J Environ Sci (China);53:78-87, 2017 Mar.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Azo dyes are extensively used in textile dyeing and other industries. Effluents of dying industries are specially colored and could cause severe damage to the environment. The anaerobic treatment of textile dying effluents is nowadays the preferred option, but it could generate carcinogenic aromatic amines. Recently, yeasts have become a promising alternative, combining unicellular growth with oxidative mechanisms. This work reports the characterization of the first methylotrophic yeast with dye decolorizing ability, Candida boidinii MM 4035 and some insights into its decoloration mechanism. The analysis of two selected media revealed a possible two stages mechanism of Reactive Black 5 decoloration. In glucose poor media, decoloration is incomplete and only the first stage proceeds, leading to the accumulation of a purple compound. In media with higher glucose concentrations, the yeast is able to decolorize totally an initial concentration of 200mg/L. The entire process is co-metabolic, being largely dependent on glucose concentration but being able to proceed with several nitrogen sources. Manganese dependent peroxidase but not laccase activity could be detected during decoloration. Aromatic amines do not accumulate in culture media, supporting an oxidative decoloration mechanism of unknown ecophysiological relevance.
[Mh] Termos MeSH primário: Candida/fisiologia
Naftalenossulfonatos/metabolismo
Indústria Têxtil
Eliminação de Resíduos Líquidos/métodos
Poluentes Químicos da Água/metabolismo
[Mh] Termos MeSH secundário: Biodegradação Ambiental
Resíduos Industriais
Naftalenossulfonatos/análise
Têxteis
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Industrial Waste); 0 (Naphthalenesulfonates); 0 (Water Pollutants, Chemical); O0HDY58362 (Remazol black B)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170616
[Lr] Data última revisão:
170616
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170405
[St] Status:MEDLINE



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