Base de dados : MEDLINE
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[PMID]:28278776
[Au] Autor:Sreeda P; Sathya AB; Sivasubramanian V
[Ad] Endereço:a Department of Chemical Engineering , National Institute of Technology Calicut, Kozhikode , Kerala , India.
[Ti] Título:Novel application of high-density polyethylene mesh as self-forming dynamic membrane integrated into a bioreactor for wastewater treatment.
[So] Source:Environ Technol;39(1):51-58, 2018 Jan.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In the present study, self-forming dynamic membrane (SFDM) on rigid high-density polyethylene (HDPE) mesh with a large pore size of 2 mm is reported for the first time. The system was investigated for utilisation in simulated wastewater treatment by integrating the mesh with an aerobic bioreactor. The SFDM was analysed using Fourier transform infra-red (FT-IR) spectroscopy and visualised by scanning electron microscopy (SEM). The effect of the operating parameter on the change in composition of SFDM was also investigated. The system was used as a single unit for treatment of wastewater and showed stability over long-term treatment. The system could achieve a chemical oxygen demand (COD) reduction of 82.16 ± 6.47% at an influent COD concentration of 613.93 ± 72.13 mg/l and ammonia removal efficiency of 97.21 ± 0.62% at an influent ammonia concentration of 55.54 ± 2.23 mg/l. The reactor generated high-quality effluent and the turbidity recorded was less than 2NTU. In addition, the operational parameters, namely hydraulic retention time and organic loading rate, were optimised.
[Mh] Termos MeSH primário: Reatores Biológicos
Filtração/instrumentação
Polietileno/química
Eliminação de Resíduos Líquidos/métodos
[Mh] Termos MeSH secundário: Espectroscopia de Infravermelho com Transformada de Fourier
Águas Residuais/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Waste Water); 9002-88-4 (Polyethylene)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170311
[St] Status:MEDLINE
[do] DOI:10.1080/09593330.2017.1294623


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[PMID]:28278766
[Au] Autor:Wu C; Xu P; Xu B; Li W; Li S; Wang X
[Ad] Endereço:a Key Laboratory of Biomass Chemical Engineering of Ministry of Education , Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus) , Hangzhou , People's Republic of China.
[Ti] Título:o-Xylene removal using one- and two-phase partitioning biotrickling filters: steady/transient-state performance and microbial community.
[So] Source:Environ Technol;39(1):109-119, 2018 Jan.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In this study, one- and two-phase partitioning biotrickling filters (1P-BTF and 2P-BTF, respectively) inoculated with a pre-acclimated mixed culture were examined for the removal of hydrophobic and refractory o-xylene. A small fraction of silicone oil (5% v/v) was added as a non-aqueous phase. Due to the presence of silicone oil, the 2P-BTF exhibited superior performance and stability for o-xylene biodegradation at steady and transient operations. Higher macro-kinetic constants for o-xylene removal by the Michaelis-Menten model were obtained for the 2P-BTF with a saturation constant of 0.396 g m and a maximum elimination capacity of 105.7 g m h . The enhancement of removal performance for the 2P-BTF was supported by dominant specialized microorganisms with o-xylene biodegradability. The diversity of microbial community was influenced by the presence of silicone oil. This study demonstrated that a BTF with 5% of silicone oil could be applied for the treatment of hydrophobic and refractory volatile organic compounds. It also provided valuable information for better understanding the relationship between microbial community and removal performance using two-phase partitioning bioreactors.
[Mh] Termos MeSH primário: Reatores Biológicos/microbiologia
Filtração/métodos
Eliminação de Resíduos Líquidos/métodos
Xilenos/análise
[Mh] Termos MeSH secundário: Biodegradação Ambiental
Xilenos/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Xylenes)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170311
[St] Status:MEDLINE
[do] DOI:10.1080/09593330.2017.1296892


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[PMID]:28266229
[Au] Autor:Liu Y; Lei Y; Xi Y; Liao Z; Zhang X
[Ad] Endereço:a College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse , Fujian Normal University , Fuzhou , People's Republic of China.
[Ti] Título:High-load domestic wastewater treatment using a combined anaerobic-aerobic bio-filter with coal cinder as medium.
[So] Source:Environ Technol;39(1):102-108, 2018 Jan.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A combined anaerobic-aerobic bio-filter technology was used for field treatment of high-organic-load domestic wastewater with coal cinder as the bio-filter medium. The effects of parameters, including hydraulic retention time (HRT) and backflow ratio, on the decrease in the chemical oxygen demand (COD), NH -N, total nitrogen (TN), total phosphorus (TP), and turbidity were investigated. The results showed the obvious influence of the HRT and ratio of backflow on wastewater treatment. Under the optimal HRT condition of 18 h, the removal efficiencies of COD, NH -N, TN, TP, and turbidity were 67.9%, 95.6%, 30.4%, 65.6%, and 83.8%, respectively. When the backflow ratio (2:1) was added to the treatment system, the TN removal obviously increased, and the removal efficiencies of COD, NH -N, TN, TP, and turbidity were 88.1%, 91.7%, 69.9%, 69.6%, and 97.5%, respectively. These results indicated that the combined technology has the potential as a treatment method for high-organic-load domestic wastewater.
[Mh] Termos MeSH primário: Filtração/métodos
Eliminação de Resíduos Líquidos/métodos
Águas Residuais/química
[Mh] Termos MeSH secundário: Anaerobiose
Carvão Mineral
Nitrogênio
Fósforo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Coal); 0 (Waste Water); 27YLU75U4W (Phosphorus); N762921K75 (Nitrogen)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170308
[St] Status:MEDLINE
[do] DOI:10.1080/09593330.2017.1296496


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[PMID]:29406114
[Au] Autor:Xu H; Zhang D; Xu Z; Liu Y; Jiao R; Wang D
[Ad] Endereço:Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 1
[Ti] Título:Study on the effects of organic matter characteristics on the residual aluminum and flocs in coagulation processes.
[So] Source:J Environ Sci (China);63:307-317, 2018 Jan.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Characteristics of organic matter may affect the residual aluminum after the coagulation process. This study reported the results of a survey for one drinking water treatment plant and measured the concentration of residual aluminum species with different molecular weights. Survey results indicated that humic acid or organic matter whose molecular weight was smaller than 1500Da had significant effects on residual aluminum. All the treatment processes were ineffective in removing dissolved organic matter whose molecular weight was smaller than 1500Da. These results also indicated that the addition of sand or polyacrylamide in the coagulation process could greatly decrease the concentration of humic acid, and the concentration of residual aluminum also decreased. These results revealed that for all water samples after filtration, the majority of total residual aluminum existed in the form of total dissolved aluminum, accounting for 70%-90%. The concentration of residual aluminum produced in bovine serum albumin solutions indicated that when the DOC was larger than 4.0mg/L, there were still significant differences when the solution pH value varied from 4.0 to 9.0.
[Mh] Termos MeSH primário: Alumínio/química
Poluentes Químicos da Água/química
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Alumínio/análise
Filtração
Floculação
Concentração de Íons de Hidrogênio
Peso Molecular
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); CPD4NFA903 (Aluminum)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180216
[Lr] Data última revisão:
180216
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE


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[PMID]:29406109
[Au] Autor:Zhang J; Li L; Liu J; Wang Y
[Ad] Endereço:State key laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: zhangjingying123@126.com.
[Ti] Título:Effects of oxygen and water content on microbial distribution in the polyurethane foam cubes of a biofilter for SO removal.
[So] Source:J Environ Sci (China);63:268-276, 2018 Jan.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The performance of a biofilter for off-gas treatment relies on the activity of microorganisms and adequate O and H O. In present study, a microelectrode was applied to analyze O in polyurethane foam cubes (PUFCs) packed in a biofilter for SO removal. The O distribution varied with the density and water-containing rate (WCR) of PUFCs. The O concentration dropped sharply from 10.2 to 0.8mg/L from the surface to the center of a PUFC with 97.20% of WCR. The PUFCs with high WCR presented aerobic-anoxic-aerobic areas. Three-dimensional simulated images demonstrated that the structure of PUFCs with high WCR consisted of an aerobic "shell" and an anoxic "core", with high-density PUFCs featuring a larger anoxic area than low-density PUFCs. Moreover, the H O distribution in the PUFC was uneven and affected the O concentration. Whereas aerobic bacteria were observed in the PUFC surface, facultative anaerobic microorganisms were found at the PUFC core, where the O concentration was relatively low. O and H O distributions differed in the PUFCs, and the distribution of microorganisms varied accordingly.
[Mh] Termos MeSH primário: Oxigênio/análise
Poliuretanos/química
Dióxido de Enxofre/análise
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Filtração/métodos
Dióxido de Enxofre/química
Microbiologia da Água
Poluentes Químicos da Água/química
Purificação da Água/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Polyurethanes); 0 (Water Pollutants, Chemical); 0UZA3422Q4 (Sulfur Dioxide); 9009-54-5 (polyurethane foam); S88TT14065 (Oxygen)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180216
[Lr] Data última revisão:
180216
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE


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[PMID]:28468513
[Au] Autor:Al Ashhab A; Sweity A; Bayramoglu B; Herzberg M; Gillor O
[Ad] Endereço:a Zuckerberg Institute for Water Research, Jacob Blaustein Institutes for Desert Research , Ben-Gurion University of the Negev , Midreshet Ben Gurion , Israel.
[Ti] Título:Biofouling of reverse osmosis membranes: effects of cleaning on biofilm microbial communities, membrane performance, and adherence of extracellular polymeric substances.
[So] Source:Biofouling;33(5):397-409, 2017 05.
[Is] ISSN:1029-2454
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Laboratory-scale reverse osmosis (RO) flat-sheet systems were used with two parallel flow cells, one treated with cleaning agents and a control (ie undisturbed). The cleaning efforts increased the affinity of extracellular polymeric substances (EPS) to the RO membrane and altered the biofilm surface structure. Analysis of the membrane biofilm community composition revealed the dominance of Proteobacteria. However, within the phylum Proteobacteria, γ-Proteobacteria dominated the cleaned membrane biofilm, while ß-Proteobacteria dominated the control biofilm. The composition of the fungal phyla was also altered by cleaning, with enhancement of Ascomycota and suppression of Basidiomycota. The results suggest that repeated cleaning cycles select for microbial groups that strongly attach to the RO membrane surface by producing rigid and adhesive EPS that hampers membrane performance.
[Mh] Termos MeSH primário: Aderência Bacteriana/efeitos dos fármacos
Biofilmes/efeitos dos fármacos
Incrustação Biológica/prevenção & controle
Detergentes/farmacologia
Membranas Artificiais
Proteobactérias/efeitos dos fármacos
[Mh] Termos MeSH secundário: Ascomicetos/efeitos dos fármacos
Ascomicetos/crescimento & desenvolvimento
Ascomicetos/fisiologia
Filtração
Osmose
Polímeros/química
Proteobactérias/crescimento & desenvolvimento
Purificação da Água/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Detergents); 0 (Membranes, Artificial); 0 (Polymers)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170505
[St] Status:MEDLINE
[do] DOI:10.1080/08927014.2017.1318382


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Texto completo SciELO Colômbia
Texto completo SciELO Saúde Pública
[PMID]:28453039
[Au] Autor:Pérez-Vidal A; Díaz-Gómez J; Salamanca-Rojas KL; Rojas-Torres LY
[Ad] Endereço:Universidad Santiago de Cali, Cali, Colombia, andrea.perez00@usc.edu.co.
[Ti] Título:[Evaluation of drinking-water treatment by Lifestraw® and Ceramic-pot filters].
[Ti] Título:Evaluación del tratamiento de agua para consumo humano mediante filtros Lifestraw® y Olla Cerámica..
[So] Source:Rev Salud Publica (Bogota);18(2):275-289, 2016 Apr.
[Is] ISSN:0124-0064
[Cp] País de publicação:Colombia
[La] Idioma:spa
[Ab] Resumo:Objective To evaluate under laboratory conditions, the removal efficiency of turbidity and E. coli of two household water filters: LifeStraw® family (MF) and ceramic pot filter (CPF). Methods The two systems were operated over 6 months using two identical control units per system, treating 7.5 L/d of a synthetic substrate used as raw water. The turbidity of the substrate was adjusted with Kaolinite and the E. coli concentration, with a replica of the ATCC 95922 strain. The differences of effluent quality of the systems, in terms of turbidity and E. coli, were evaluated with Analysis of Variance (ANOVA). Operative and maintenance aspects, that could limit or enhance the use of the systems, were also considered in the evaluation. Results The water synthetic substrate quality had an average of 32.2 ± 2.8 NTU for turbidity and 3,9x105 UFC/100 mL for E. coli. Both systems reduce the turbidity to values below 2 NTU with an inactivation of 100 % of E. coli. Statistical differences were found between the systems in terms of turbidity removal, MF being more efficient than the CPF (99,2 ± 0.4 % and 97.6 % ± 1.14, respectively). Conclusions Both systems are suitable for household water supply treatment, acheiving the water quality standards established by Colombian regulations. The MF was more efficient for suspended solids removal and filtration rate, but when economic, operative, and maintenance aspects along with social acceptability and lifespan are considered, the CPF seems more suitable, especially in rural areas.
[Mh] Termos MeSH primário: Cerâmica
Filtração/instrumentação
Purificação da Água/instrumentação
Abastecimento de Água
[Mh] Termos MeSH secundário: Análise de Variância
Escherichia coli/isolamento & purificação
Nefelometria e Turbidimetria/métodos
Microbiologia da Água
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE


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[PMID]:28448459
[Au] Autor:Bonetta S; Pignata C; Bonetta S; Meucci L; Giacosa D; Marino E; Gilli G; Carraro E
[Ad] Endereço:Department of Public Health and Pediatrics, University of Torino, P.zza Polonia 94, 10126 Torino, Italy. sara.bonetta@unito.it.
[Ti] Título:Viability of Legionella pneumophila in Water Samples: A Comparison of Propidium Monoazide (PMA) Treatment on Membrane Filters and in Liquid.
[So] Source:Int J Environ Res Public Health;14(5), 2017 04 27.
[Is] ISSN:1660-4601
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:is a ubiquitous microorganism widely distributed in aquatic environments and can cause Legionellosis in humans. A promising approach to detect viable cells in water samples involves the use of quantitative polymerase chain reaction (qPCR) in combination with photoactivatable DNA intercalator propidium monoazide (PMA). However, the PMA efficiency could be different depending on the experimental conditions used. The aim of this study was to compare two PMA exposure protocols: (A) directly on the membrane filter or (B) in liquid after filter washing. The overall PMA-induced qPCR means reductions in heat-killed cells were 2.42 and 1.91 log units for exposure protocols A and B, respectively. A comparison between the results obtained reveals that filter exposure allows a higher PMA-qPCR signal reduction to be reached, mainly at low concentrations ( < 0.05). This confirms the potential use of this method to quantify in water with low contamination.
[Mh] Termos MeSH primário: Filtração/métodos
Legionella pneumophila/isolamento & purificação
Membranas Artificiais
Viabilidade Microbiana
Microbiologia da Água
[Mh] Termos MeSH secundário: Azidas/química
Corantes/química
Propídio/análogos & derivados
Propídio/química
Reação em Cadeia da Polimerase em Tempo Real
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Azides); 0 (Coloring Agents); 0 (Membranes, Artificial); 0 (propidium monoazide); 36015-30-2 (Propidium)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:180201
[Lr] Data última revisão:
180201
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170428
[St] Status:MEDLINE


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[PMID]:28463439
[Au] Autor:Du Y; Zhang C; Zhong QZ; Yang X; Wu J; Xu ZK
[Ad] Endereço:MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, PR China.
[Ti] Título:Ultrathin Alginate Coatings as Selective Layers for Nanofiltration Membranes with High Performance.
[So] Source:ChemSusChem;10(13):2788-2795, 2017 07 10.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:It is highly desirable to develop environmentally friendly processes for fabricating thin-film composite (TFC) nanofiltration membranes (NFMs) from natural materials. However, the nanofiltration performance of such TFC NFMs is not satisfactory for practical applications owing to the lack of efficient methods for constructing ultrathin, uniform, stable coatings as selective layers. In this study, a contra-diffusion strategy is used to fabricate TFC NFMs with ultrathin cross-linked alginate coatings as selective layers without the use of any organic solvents. The as-prepared NFMs show a water permeation flux that is nearly one order of magnitude higher than that of other alginate-based TFC NFMs with similar salt rejection, and represents the best performance among all TFC NFMs from natural materials. These NFMs also demonstrate excellent mono-/divalent ion selectivity, as well as good long-term operation stability and antifouling properties. Furthermore, this strategy maximizes the reactant usage rate, minimizes the waste discharge and provides new insight into environmentally friendly fabrication of TFC NFMs.
[Mh] Termos MeSH primário: Alginatos/química
Filtração/métodos
Membranas Artificiais
Nanotecnologia/métodos
[Mh] Termos MeSH secundário: Ácido Glucurônico/química
Ácidos Hexurônicos/química
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Alginates); 0 (Hexuronic Acids); 0 (Membranes, Artificial); 8A5D83Q4RW (Glucuronic Acid); 8C3Z4148WZ (alginic acid)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:180118
[Lr] Data última revisão:
180118
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201700519


  10 / 21589 MEDLINE  
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[PMID]:27778226
[Au] Autor:Aboian MS; Yu JF; Gautam A; Sze CH; Yang JK; Chan J; Lillaney PV; Jordan CD; Oh HJ; Wilson DM; Patel AS; Wilson MW; Hetts SW
[Ad] Endereço:Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry St, Suite 350, Room 320, San Francisco, CA, 94107-5705, USA.
[Ti] Título:In vitro clearance of doxorubicin with a DNA-based filtration device designed for intravascular use with intra-arterial chemotherapy.
[So] Source:Biomed Microdevices;18(6):98, 2016 12.
[Is] ISSN:1572-8781
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:To report a novel method using immobilized DNA within mesh to sequester drugs that have intrinsic DNA binding characteristics directly from flowing blood. DNA binding experiments were carried out in vitro with doxorubicin in saline (PBS solution), porcine serum, and porcine blood. Genomic DNA was used to identify the concentration of DNA that shows optimum binding clearance of doxorubicin from solution. Doxorubicin binding kinetics by DNA enclosed within porous mesh bags was evaluated. Flow model simulating blood flow in the inferior vena cava was used to determine in vitro binding kinetics between doxorubicin and DNA. The kinetics of doxorubicin binding to free DNA is dose-dependent and rapid, with 82-96 % decrease in drug concentration from physiologic solutions within 1 min of reaction time. DNA demonstrates faster binding kinetics by doxorubicin as compared to polystyrene resins that use an ion exchange mechanism. DNA contained within mesh yields an approximately 70 % decrease in doxorubicin concentration from solution within 5 min. In the IVC flow model, there is a 70 % drop in doxorubicin concentration at 60 min. A DNA-containing ChemoFilter device can rapidly clear clinical doses of doxorubicin from a flow model in simple and complex physiological solutions, thereby suggesting a novel approach to reduce the toxicity of DNA-binding drugs.
[Mh] Termos MeSH primário: Artérias
DNA/química
Doxorrubicina/química
Doxorrubicina/isolamento & purificação
Filtração/instrumentação
[Mh] Termos MeSH secundário: Animais
Doxorrubicina/sangue
Doxorrubicina/uso terapêutico
Desenho de Equipamento
Estudos de Viabilidade
Cinética
Suínos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL
[Nm] Nome de substância:
80168379AG (Doxorubicin); 9007-49-2 (DNA)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171213
[Lr] Data última revisão:
171213
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161026
[St] Status:MEDLINE



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