Base de dados : MEDLINE
Pesquisa : D01.765 [Categoria DeCS]
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  1 / 979 MEDLINE  
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[PMID]:29019283
[Au] Autor:Mello-Andrade F; da Costa WL; Pires WC; Pereira FC; Cardoso CG; Lino-Junior RS; Irusta VRC; Carneiro CC; de Melo-Reis PR; Castro CH; Almeida MAP; Batista AA; Silveira-Lacerda EP
[Ad] Endereço:1 Laboratório de Genética Molecular e Citogenética, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil.
[Ti] Título:Antitumor effectiveness and mechanism of action of Ru(II)/amino acid/diphosphine complexes in the peritoneal carcinomatosis progression.
[So] Source:Tumour Biol;39(10):1010428317695933, 2017 Oct.
[Is] ISSN:1423-0380
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Peritoneal carcinomatosis is considered as a potentially lethal clinical condition, and the therapeutic options are limited. The antitumor effectiveness of the [Ru(l-Met)(bipy)(dppb)]PF (1) and the [Ru(l-Trp)(bipy)(dppb)]PF (2) complexes were evaluated in the peritoneal carcinomatosis model, Ehrlich ascites carcinoma-bearing Swiss mice. This is the first study that evaluated the effect of Ru(II)/amino acid complexes for antitumor activity in vivo. Complexes 1 and 2 (2 and 6 mg kg ) showed tumor growth inhibition ranging from moderate to high. The mean survival time of animal groups treated with complexes 1 and 2 was higher than in the negative and vehicle control groups. The induction of Ehrlich ascites carcinoma in mice led to alterations in hematological and biochemical parameters, and not the treatment with complexes 1 and 2. The treatment of Ehrlich ascites carcinoma-bearing mice with complexes 1 and 2 increased the number of Annexin V positive cells and cleaved caspase-3 levels and induced changes in the cell morphology and in the cell cycle phases by induction of sub-G1 and G0/G1 cell cycle arrest. In addition, these complexes reduce angiogenesis induced by Ehrlich ascites carcinoma cells in chick embryo chorioallantoic membrane model. The treatment with the LAT1 inhibitor decreased the sensitivity of the Ehrlich ascites carcinoma cells to complexes 1 and 2 in vitro-which suggests that the LAT1 could be related to the mechanism of action of amino acid/ruthenium(II) complexes, consequently decreasing the glucose uptake. Therefore, these complexes could be used to reduce tumor growth and increase mean survival time with less toxicity than cisplatin. Besides, these complexes induce apoptosis by combination of different mechanism of action.
[Mh] Termos MeSH primário: Antineoplásicos/farmacologia
Carcinoma de Ehrlich/patologia
Neoplasias Peritoneais/patologia
Compostos de Rutênio/farmacologia
[Mh] Termos MeSH secundário: Aminoácidos/farmacologia
Animais
Western Blotting
Camundongos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amino Acids); 0 (Antineoplastic Agents); 0 (Ruthenium Compounds)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171017
[Lr] Data última revisão:
171017
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171012
[St] Status:MEDLINE
[do] DOI:10.1177/1010428317695933


  2 / 979 MEDLINE  
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[PMID]:28859118
[Au] Autor:Tarmann L; Wackernagel W; Ivastinovic D; Schneider M; Winkler P; Langmann G
[Ad] Endereço:Department of Ophthalmology, Medical University Graz, Graz, Austria.
[Ti] Título:Tumor parameters predict the risk of side effects after ruthenium-106 plaque brachytherapy of uveal melanomas.
[So] Source:PLoS One;12(8):e0183833, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: To report on radiation-related side effects and complications after ruthenium-106 plaque brachytherapy of uveal melanomas. METHODS: Medical records of 143 eyes with uveal melanoma, treated by ruthenium-106 brachytherapy between 1997 and 2012 at a single center, were analyzed. We evaluated the occurrence of radiation-related side effects on the anterior and posterior segment of the eye. The influence of patient, tumor and treatment parameters on outcome was analyzed by multivariate time to event analysis considering competing risks. RESULTS: The median overall follow-up was 37.9 months. After treatment, the estimated risk at 12, 24 and 48 months for developing anterior segment complications was 25.3%, 37.5% and 50.3% for cataract formation and 5.4%, 6.4% and 8.1% for secondary glaucoma, respectively. The estimated risk for the occurrence of posterior segment complications 12, 24 and 48 months after treatment was 3.1%, 6.7% and 18.3% for radiation retinopathy, 18.3%, 27.1% and 42.6% for radiation maculopathy and 16.5%, 21.0% and 32.8% for radiation neuropathy, respectively. The risk of an increase in retinal detachment after treatment was 14.7%, 14.7% and 17.4% at 12, 24 and 48 months, respectively. The risk of vitreous hemorrhage occurring after treatment was 6.2%, 8.1% and 12.7%, and the risk of tumor vasculopathy was 15.4%, 17.4% and 19.0%. Scleral necrosis was observed in one patient. CONCLUSION: Radiation-related side effects and complications are common among patients treated with ruthenium brachytherapy for uveal melanoma. However, the risk for those largely depends on individual tumor parameters. Before treatment, patients should be informed of their specific risks to develop various side effects. Patient information before treatment should cover not only general information about the treatment and possible complications and side effects but should also give details on the specific risks of the patient in her individual situation. This also includes elucidating the patient's individual resources and expectations and her willingness for long-term regular follow-up examinations and secondary adjunct treatments.
[Mh] Termos MeSH primário: Braquiterapia/efeitos adversos
Melanoma/radioterapia
Compostos de Rutênio/efeitos adversos
Neoplasias Uveais/radioterapia
Acuidade Visual/efeitos da radiação
[Mh] Termos MeSH secundário: Adulto
Idoso
Idoso de 80 Anos ou mais
Catarata/etiologia
Catarata/patologia
Olho/patologia
Olho/efeitos da radiação
Feminino
Seres Humanos
Masculino
Melanoma/complicações
Melanoma/patologia
Meia-Idade
Doenças do Nervo Óptico/etiologia
Doenças do Nervo Óptico/patologia
Descolamento Retiniano/etiologia
Descolamento Retiniano/patologia
Neoplasias Uveais/complicações
Neoplasias Uveais/patologia
Hemorragia Vítrea/etiologia
Hemorragia Vítrea/patologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ruthenium Compounds); 97E960G9RP (ruthenium tetraoxide)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171013
[Lr] Data última revisão:
171013
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170901
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0183833


  3 / 979 MEDLINE  
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[PMID]:28549326
[Au] Autor:Sathishkumar K; Sathiyaraj S; Parthipan P; Akhil A; Murugan K; Rajasekar A
[Ad] Endereço:Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Vellore, 632 115, India. Electronic address: ksathish570@gmail.com.
[Ti] Título:Electrochemical decolorization of methyl red by RuO -IrO -TiO electrode and biodegradation with Pseudomonas stutzeri MN1 and Acinetobacter baumannii MN3: An integrated approach.
[So] Source:Chemosphere;183:204-211, 2017 Sep.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Textile effluent consists of enormous quantities of toxic dyes, which are being discharged into natural aqueous system and thus contaminate the water quality. Hence it is important to develop an eco-friendly and cost effective technology to treat the dyes contaminated wastewater. In this research, an integrated approach of electrochemical oxidation (EO) and biodegradation process (BP) was studied of methyl red (MR) dye. In EO, RuO -IrO -TiO is used as anode and titanium mesh electrode as cathode. This was followed by BP of the treated EO effluent. Various parameters viz., pH (5-10), sodium chloride concentrations (NaCl) (1-5 g L ) and current density (10-30 mA cm ) were optimized. The results of the EO showed 99.96% of MR decolorization within 10 min at pH of 5, NaCl of 2 g L and current density of 30 mA cm . The EO treated MR was further treated by BP Pseudomonas stutzeri MN1, Acinetobacter baumannii MN3 and mixed consortia of MN1 and MN3. The out of three treatments, the results of mixed consortium BP showed 90% removal of COD at the end of 24 h. The phytotoxic evaluation using Vigna radiata seeds confirmed the toxicity of untreated MR solution, whereas, 100% germination was observed in treated (biodegraded) MR solution. Overall these results evidenced that MR dye was completely decolorized and mineralized by EO and BP within 10 min and 24 h respectively. Hence, this integrated approach can be used as an effective degradation method to treat dyes in the textile industry.
[Mh] Termos MeSH primário: Acinetobacter baumannii/metabolismo
Compostos Azo/análise
Técnicas Eletroquímicas/métodos
Pseudomonas stutzeri/metabolismo
Poluentes Químicos da Água/análise
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Biodegradação Ambiental
Eletrodos
Irídio/química
Oxirredução
Compostos de Rutênio/química
Indústria Têxtil
Titânio/química
Águas Residuais/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Azo Compounds); 0 (Ruthenium Compounds); 0 (Waste Water); 0 (Water Pollutants, Chemical); 12030-49-8 (iridium oxide); 12036-10-1 (ruthenium dioxide); 15FIX9V2JP (titanium dioxide); 44448S9773 (Iridium); 69083AX1ZX (methyl red); D1JT611TNE (Titanium)
[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


  4 / 979 MEDLINE  
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[PMID]:28435255
[Au] Autor:Thangavel P; Viswanath B; Kim S
[Ad] Endereço:Department of Bionanotechnology, Gachon University, Bokjeong-Dong, Sujeong-Gu, Seongnam-Si, Gyeonggi-Do.
[Ti] Título:Recent developments in the nanostructured materials functionalized with ruthenium complexes for targeted drug delivery to tumors.
[So] Source:Int J Nanomedicine;12:2749-2758, 2017.
[Is] ISSN:1178-2013
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:In recent years, the field of metal-based drugs has been dominated by other existing precious metal drugs, and many researchers have focused their attention on the synthesis of various ruthenium (Ru) complexes due to their potential medical and pharmaceutical applications. The beneficial properties of Ru, which make it a highly promising therapeutic agent, include its variable oxidation states, low toxicity, high selectivity for diseased cells, ligand exchange properties, and the ability to mimic iron binding to biomolecules. In addition, Ru complexes have favorable adsorption properties, along with excellent photochemical and photophysical properties, which make them promising tools for photodynamic therapy. At present, nanostructured materials functionalized with Ru complexes have become an efficient way to administer Ru-based anticancer drugs for cancer treatment. In this review, the recent developments in the nanostructured materials functionalized with Ru complexes for targeted drug delivery to tumors are discussed. In addition, information on "traditional" (ie, non-nanostructured) Ru-based cancer therapies is included in a precise manner.
[Mh] Termos MeSH primário: Antineoplásicos/administração & dosagem
Sistemas de Liberação de Medicamentos/métodos
Nanoestruturas/administração & dosagem
Nanoestruturas/química
Rutênio/química
[Mh] Termos MeSH secundário: Antineoplásicos/química
Seres Humanos
Ligantes
Neoplasias/tratamento farmacológico
Fotoquimioterapia/métodos
Compostos de Rutênio/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Antineoplastic Agents); 0 (Ligands); 0 (Ruthenium Compounds); 7UI0TKC3U5 (Ruthenium)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170807
[Lr] Data última revisão:
170807
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170425
[St] Status:MEDLINE
[do] DOI:10.2147/IJN.S131304


  5 / 979 MEDLINE  
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[PMID]:28088012
[Au] Autor:Milutinovic MM; Rilak A; Bratsos I; Klisuric O; Vranes M; Gligorijevic N; Radulovic S; Bugarcic ZD
[Ad] Endereço:Faculty of Science, University of Kragujevac, R. Domanovica 12, P. O. Box 60, 34000 Kragujevac, Serbia.
[Ti] Título:New 4'-(4-chlorophenyl)-2,2':6',2″-terpyridine ruthenium(II) complexes: Synthesis, characterization, interaction with DNA/BSA and cytotoxicity studies.
[So] Source:J Inorg Biochem;169:1-12, 2017 Apr.
[Is] ISSN:1873-3344
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In this study, we have developed a series of new monofunctional Ru(II) complexes of the general formula mer-[Ru(Cl-Ph-tpy)(N-N)Cl]Cl in which Cl-Ph-tpy is 4'-(4-chlorophenyl)-2,2':6',2″-terpyridine, N-N is a bidentate chelating ligand (1,2-diaminoethane (en, 1), 1,2-diaminocyclohexane (dach, 2) or 2,2'-bipyridine (bpy, 3)). All complexes were fully characterized by elemental analysis and spectroscopic techniques (IR, UV-Vis, 1D and 2D NMR). Their chemical behavior in aqueous solution was studied by UV-Vis and NMR spectroscopy showing that all compounds are relatively labile leading to the formation of the corresponding aqua species 1aq-3aq. Their DNA binding ability was evaluated by UV-Vis spectroscopy, fluorescence quenching measurements and viscosity measurements. Competitive studies with ethidium bromide (EB) showed that the complexes can displace DNA-bound EB, suggesting strong competition with EB (K =1.1-2.7×10 M ). These experiments show that the ruthenium complexes interact with DNA via intercalation. The complexes bind to serum protein albumin displaying relatively high binding constants (K =10 -10 M ). Compound 3 displayed from high to moderate cytotoxicity against two cancer cell lines HeLa and A549 (with IC ca. 12.7µM and 53.8µM, respectively), while complexes 1 and 2 showed only moderate cytotoxicity (with IC ca. 84.8µM and 96.3µM, respectively) against HeLa cells. The cell cycle analysis (by flow cytometry) of HeLa and A549 cells treated with complex 3 shows minor changes on the cell cycle phase distribution.
[Mh] Termos MeSH primário: DNA/metabolismo
Substâncias Intercalantes/química
Substâncias Intercalantes/síntese química
Compostos de Rutênio/química
Compostos de Rutênio/síntese química
Rutênio/química
Soroalbumina Bovina/metabolismo
[Mh] Termos MeSH secundário: Células A549
Animais
Bovinos
Ciclo Celular/efeitos dos fármacos
Sobrevivência Celular/efeitos dos fármacos
DNA/química
Células HeLa
Seres Humanos
Substâncias Intercalantes/efeitos adversos
Ligação Proteica
Compostos de Rutênio/efeitos adversos
Soroalbumina Bovina/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Intercalating Agents); 0 (Ruthenium Compounds); 27432CM55Q (Serum Albumin, Bovine); 7UI0TKC3U5 (Ruthenium); 9007-49-2 (DNA)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170115
[St] Status:MEDLINE


  6 / 979 MEDLINE  
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[PMID]:28075589
[Au] Autor:Toledano-Magaña Y; García-Ramos JC; Torres-Gutiérrez C; Vázquez-Gasser C; Esquivel-Sánchez JM; Flores-Alamo M; Ortiz-Frade L; Galindo-Murillo R; Nequiz M; Gudiño-Zayas M; Laclette JP; Carrero JC; Ruiz-Azuara L
[Ad] Endereço:Departamento de Química Inorgánica y Nuclear, Facultad de Química, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico.
[Ti] Título:Water-Soluble Ruthenium (II) Chiral Heteroleptic Complexes with Amoebicidal in Vitro and in Vivo Activity.
[So] Source:J Med Chem;60(3):899-912, 2017 Feb 09.
[Is] ISSN:1520-4804
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Three water-soluble Ru(II) chiral heteroleptic coordination compounds [Ru(en)(pdto)]Cl (1), [Ru(gly)(pdto)]Cl (2), and [Ru(acac)(pdto)]Cl (3), where pdto = 2,2'-[1,2-ethanediylbis-(sulfanediyl-2,1-ethanediyl)]dipyridine, en = ethylendiamine, gly = glycinate, and acac = acetylacetonate, have been synthezised and fully characterized. The crystal structures of compounds 1-3 are described. The IC values for compounds 1-3 are within nanomolar range (14, 12, and 6 nM, respectively). The cytotoxicity for human peripheral blood lymphocytes is extremely low (>100 µM). Selectivity indexes for Ru(II) compounds are in the range 700-1300. Trophozoites exposed to Ru(II) compounds die through an apoptotic pathway triggered by ROS production. The orally administration to infected mice induces a total elimination of the parasite charge in mice faeces 1-2-fold faster than metronidazole. Besides, all compounds inhibit the trophozoite proliferation in amoebic liver abscess induced in hamster. All our results lead us to propose these compounds as promising candidates as antiparasitic agents.
[Mh] Termos MeSH primário: Antiprotozoários/farmacologia
Entamoeba histolytica/efeitos dos fármacos
Compostos de Rutênio/farmacologia
[Mh] Termos MeSH secundário: Animais
Antiprotozoários/química
Antiprotozoários/uso terapêutico
Apoptose/efeitos dos fármacos
Células Cultivadas
Cricetinae
Cristalografia por Raios X
Seres Humanos
Concentração Inibidora 50
Abscesso Hepático Amebiano/tratamento farmacológico
Camundongos
Espécies Reativas de Oxigênio/metabolismo
Compostos de Rutênio/química
Compostos de Rutênio/uso terapêutico
Estereoisomerismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antiprotozoal Agents); 0 (Reactive Oxygen Species); 0 (Ruthenium Compounds)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170706
[Lr] Data última revisão:
170706
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170112
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jmedchem.6b00795


  7 / 979 MEDLINE  
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[PMID]:28067662
[Au] Autor:Bai H; He P; Chen J; Liu K; Lei H; Zhang X; Dong F; Li H
[Ad] Endereço:State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China E-mail: heping@swust.edu.cn.
[Ti] Título:Electrocatalytic degradation of bromocresol green wastewater on Ti/SnO -RuO electrode.
[So] Source:Water Sci Technol;75(1-2):220-227, 2017 Jan.
[Is] ISSN:0273-1223
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Thermal decomposition method was employed to prepare a Ti/SnO -RuO electrode, on which electrocatalytic degradation of bromocresol green (BCG) was investigated in detail. Scanning electron microscopy, an X-ray diffraction analyzer and an X-ray fluorescence spectrometer were adopted to characterize the morphology, crystal structure and element analysis of the as-prepared Ti/SnO -RuO electrode. It was indicated that the Ti/SnO -RuO electrode had a 'cracked-mud' structure and exhibited a superior specific surface area. The removal efficiency of BCG on the Ti/SnO -RuO electrode was determined in terms of chemical oxygen demand and ultraviolet-visible absorption spectrometry. The results of the batch experiment indicated that the removal efficiency of BCG was influenced by the following factors in descending order: initial pH , reaction temperature, current density and electrolysis time. The removal efficiency of BCG reached up to 91% at the optimal experiment conditions (initial concentration of 100 mg L , initial pH 7, reaction temperature of 30 °C, current density of 12 mA cm and electrolysis time of 150 min). As a result, it was concluded that BCG wastewater was efficiently removed by electrochemical oxidation on the Ti/SnO -RuO electrode.
[Mh] Termos MeSH primário: Verde de Bromocresol/química
Compostos de Rutênio/química
Compostos de Estanho/química
Titânio/química
Águas Residuais/química
[Mh] Termos MeSH secundário: Eletroquímica/métodos
Eletrodos
Eletrólise
Oxirredução
Poluentes Químicos da Água/química
Purificação da Água/métodos
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ruthenium Compounds); 0 (Tin Compounds); 0 (Waste Water); 0 (Water Pollutants, Chemical); 8YGN0Y942M (Bromcresol Green); D1JT611TNE (Titanium)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170615
[Lr] Data última revisão:
170615
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170110
[St] Status:MEDLINE
[do] DOI:10.2166/wst.2016.509


  8 / 979 MEDLINE  
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[PMID]:28039820
[Au] Autor:De Coster J; Vanherck W; Appels L; Dewil R
[Ad] Endereço:KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860, Sint-Katelijne-Waver, Belgium.
[Ti] Título:Selective electrochemical degradation of 4-chlorophenol at a Ti/RuO -IrO anode in chloride rich wastewater.
[So] Source:J Environ Manage;190:61-71, 2017 Apr 01.
[Is] ISSN:1095-8630
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The electrochemical degradation of 4-chlorophenol (4-CP) in the presence of chlorides by the use of a Ti/RuO -IrO anode was investigated under different operational parameters such as applied current density (J) and chloride concentration ([NaCl]). By performing a design of experiments, a model for the removal of 4-chlorophenol under these circumstances was obtained. To investigate matrix effects for this oxidation process, the influence of various biodegradable substrates (such as glucose, a complex synthetic wastewater and a pilot-scale UASB effluent) on the degradation profile of 4-chlorophenol was investigated. The 4-CP degradation was hardly affected by the presence of glucose, which was itself only limitedly degraded (max. 5%). This indicates a selective degradation for the phenolic compound, independent of the values of the operational parameters. The presence of a more complex synthetic wastewater, however, resulted in a decrease in 4-CP degradation rate up to a factor 7. The biodegradable substrates are in this case also degraded by the electrochemical treatment. In the case where 4-CP was added to a pilot-scale UASB effluent and this wastewater was afterwards treated, the degradation rate of 4-CP only decreased by a factor 2. After 2 h of treatment, a full mineralization was obtained in this experiment. The latter observation suggests the suitability of the technique as an effluent polishing step after a biological treatment or as a treatment in recycle over a biological reactor.
[Mh] Termos MeSH primário: Clorofenóis/química
Técnicas Eletroquímicas/métodos
Eliminação de Resíduos Líquidos/métodos
Águas Residuais/química
[Mh] Termos MeSH secundário: Cloretos/química
Técnicas Eletroquímicas/instrumentação
Eletrodos
Glucose/química
Irídio/química
Oxirredução
Compostos de Rutênio/química
Titânio/química
Poluentes Químicos da Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Chlorides); 0 (Chlorophenols); 0 (Ruthenium Compounds); 0 (Waste Water); 0 (Water Pollutants, Chemical); 12030-49-8 (iridium oxide); 12036-10-1 (ruthenium dioxide); 3DLC36A01X (4-chlorophenol); 44448S9773 (Iridium); D1JT611TNE (Titanium); IY9XDZ35W2 (Glucose)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170101
[St] Status:MEDLINE


  9 / 979 MEDLINE  
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[PMID]:27899004
[Au] Autor:Vankova S; Francia C; Amici J; Zeng J; Bodoardo S; Penazzi N; Collins G; Geaney H; O'Dwyer C
[Ad] Endereço:Department of Applied Science and Technology (DISAT), Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129, Torino, Italy.
[Ti] Título:Influence of Binders and Solvents on Stability of Ru/RuO Nanoparticles on ITO Nanocrystals as Li-O Battery Cathodes.
[So] Source:ChemSusChem;10(3):575-586, 2017 Feb 08.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Fundamental research on Li-O batteries remains critical, and the nature of the reactions and stability are paramount for realising the promise of the Li-O system. We report that indium tin oxide (ITO) nanocrystals with supported 1-2 nm oxygen evolution reaction (OER) catalyst Ru/RuO nanoparticles (NPs) demonstrate efficient OER processes, reduce the recharge overpotential of the cell significantly and maintain catalytic activity to promote a consistent cycling discharge potential in Li-O cells even when the ITO support nanocrystals deteriorate from the very first cycle. The Ru/RuO nanoparticles lower the charge overpotential compared with those for ITO and carbon-only cathodes and have the greatest effect in DMSO electrolytes with a solution-processable F-free carboxymethyl cellulose (CMC) binder (<3.5 V) instead of polyvinylidene fluoride (PVDF). The Ru/RuO /ITO nanocrystalline materials in DMSO provide efficient Li O decomposition from within the cathode during cycling. We demonstrate that the ITO is actually unstable from the first cycle and is modified by chemical etching, but the Ru/RuO NPs remain effective OER catalysts for Li O during cycling. The CMC binders avoid PVDF-based side-reactions and improve the cyclability. The deterioration of the ITO nanocrystals is mitigated significantly in cathodes with a CMC binder, and the cells show good cycle life. In mixed DMSO-EMITFSI [EMITFSI=1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide] ionic liquid electrolytes, the Ru/RuO /ITO materials in Li-O cells cycle very well and maintain a consistently very low charge overpotential of 0.5-0.8 V.
[Mh] Termos MeSH primário: Fontes de Energia Elétrica
Lítio/química
Nanopartículas Metálicas/química
Oxigênio/química
Rutênio/química
Solventes/química
Compostos de Estanho/química
[Mh] Termos MeSH secundário: Catálise
Eletroquímica
Eletrodos
Oxirredução
Compostos de Rutênio/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ruthenium Compounds); 0 (Solvents); 0 (Tin Compounds); 71243-84-0 (indium tin oxide); 7UI0TKC3U5 (Ruthenium); 97E960G9RP (ruthenium tetraoxide); 9FN79X2M3F (Lithium); S88TT14065 (Oxygen)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170619
[Lr] Data última revisão:
170619
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161130
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201601301


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[PMID]:27855305
[Au] Autor:Nguyen TX; Landgraf S; Grampp G
[Ad] Endereço:Institute of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria; School of Chemical Engineering, Hanoi University of Technology, Dai Co Viet 1, Hanoi, Vietnam. Electronic address: truong.nguyenxuan@tugraz.at.
[Ti] Título:Kinetics of photoinduced electron transfer reactions of ruthenium(II) complexes and phenols, tyrosine, N-acetyl-tyrosine and tryptophan in aqueous solutions measured with modulated fluorescence spectroscopy.
[So] Source:J Photochem Photobiol B;166:28-34, 2017 Jan.
[Is] ISSN:1873-2682
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Photooxidation kinetics of phenol, 1-naphthol, 2-naphthol, tyrosine (TyrOH) and N-acetyl-tyrosine (AcTyrOH), tryptophan (TrpH) by ruthenium(II) polypyridyl complexes: [Ru(bpy) ]Cl (1), [Ru(phen) ]Cl (2), [Ru(bpy)(phen)(bpg)]Cl (3), and [Ru(dpq) (bxbg)]Cl (4) where bpy is 2,2'-bipyridine, phen - 1,10-phenanthroline, bpg - bipyridine-glycoluril, dpq - dipyrido[3,2-d:2',3'-f]quinoxaline, and bxbg - bis(o-xylene)bipyridine-glycoluril are investigated. Rate constants have been measured by steady-state luminescence and phase-modulation fluorometry in aqueous solutions at different pH's. The rates for the oxidation of the phenols and phenolic aromatic amino acids spreads over a wide range from 4.2×10 to 6.8×10 M s , depending on pH and the nature of solutes. At pH>pK of the quenchers, the presence of reactive species (PhO ) in the alkaline solutions is accounted for the rapid ET rates. In the pH range between 4 and 10 (pH
[Mh] Termos MeSH primário: Fenóis/química
Compostos de Rutênio/química
Espectrometria de Fluorescência/métodos
Triptofano/química
Tirosina/análogos & derivados
Tirosina/química
[Mh] Termos MeSH secundário: Transporte de Elétrons
Cinética
Soluções
Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Phenols); 0 (Ruthenium Compounds); 0 (Solutions); 059QF0KO0R (Water); 42HK56048U (Tyrosine); 8DUH1N11BX (Tryptophan); DA8G610ZO5 (N-acetyltyrosine)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170411
[Lr] Data última revisão:
170411
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161118
[St] Status:MEDLINE



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