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Pesquisa : D01.056.050 [Categoria DeCS]
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[PMID]:29298982
[Au] Autor:Li X; Zhai T; Gao P; Cheng H; Hou R; Lou X; Xia F
[Ad] Endereço:State Key Laboratory of Material Processing and Die & Mould Technology, School of Material Sciences and Engineering, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 430074, Wu
[Ti] Título:Role of outer surface probes for regulating ion gating of nanochannels.
[So] Source:Nat Commun;9(1):40, 2018 01 03.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Nanochannels with functional elements have shown promise for DNA sequencing, single-molecule sensing, and ion gating. Ionic current measurement is currently a benchmark, but is focused solely on the contribution from nanochannels' inner-wall functional elements (NIWFE); the attributes of functional elements at nanochannels' outer surface (NOSFE) are nearly ignored, and remain elusive. Here we show that the role of NOSFE and NIWFE for ion gating can be distinguished by constructing DNA architectures using dual-current readout. The established molecular switches have continuously tunable and reversible ion-gating ability. We find that NOSFE exhibits negligible ion-gating behavior, but it can produce a synergistic effect in alliance with NIWFE. Moreover, the high-efficiency gating systems display more noticeable synergistic effect than the low-efficiency ones. We also reveal that the probe amount of NOSFE and NIWFE is almost equally distributed in our biomimetic nanochannels, which is potentially a premise for the synergistic ion-gating phenomena.
[Mh] Termos MeSH primário: Materiais Biomiméticos
Ativação do Canal Iônico
Transporte de Íons
Nanoestruturas
[Mh] Termos MeSH secundário: Óxido de Alumínio
Técnicas de Patch-Clamp
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180209
[Lr] Data última revisão:
180209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180105
[St] Status:MEDLINE
[do] DOI:10.1038/s41467-017-02447-7


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[PMID]:29253017
[Au] Autor:Pandey P; Kunwar S; Sui M; Bastola S; Lee J
[Ad] Endereço:College of Electronics and Information, Kwangwoon University, Nowon-gu, Seoul, South Korea.
[Ti] Título:Investigation on the morphological and optical evolution of bimetallic Pd-Ag nanoparticles on sapphire (0001) by the systematic control of composition, annealing temperature and time.
[So] Source:PLoS One;12(12):e0189823, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Multi-metallic alloy nanoparticles (NPs) can offer additional opportunities for modifying the electronic, optical and catalytic properties by the control of composition, configuration and size of individual nanostructures that are consisted of more than single element. In this paper, the fabrication of bimetallic Pd-Ag NPs is systematically demonstrated via the solid state dewetting of bilayer thin films on c-plane sapphire by governing the temperature, time as well as composition. The composition of Pd-Ag bilayer remarkably affects the morphology of alloy nanostructures, in which the higher Ag composition, i.e. Pd0.25Ag0.75, leads to the enhanced dewetting of bilayers whereas the higher Pd composition (Pd0.75Ag0.25) hinders the dewetting. Depending on the annealing temperature, Pd-Ag alloy nanostructures evolve with a series of configurations, i.e. nucleation of voids, porous network, elongated nanoclusters and round alloy NPs. In addition, with the annealing time set, the gradual configuration transformation from the elongated to round alloy NPs as well as size reduction is demonstrated due to the enhanced diffusion and sublimation of Ag atoms. The evolution of various morphology of Pd-Ag nanostructures is described based on the surface diffusion and inter-diffusion of Pd and Ag adatoms along with the Ag sublimation, Rayleigh instability and energy minimization mechanism. The reflectance spectra of bimetallic Pd-Ag nanostructures exhibit various quadrupolar and dipolar resonance peaks, peak shifts and absorption dips owing to the surface plasmon resonance of nanostructures depending on the surface morphology. The intensity of reflectance spectra is gradually decreased along with the surface coverage and NP size evolution. The absorption dips are red-shifted towards the longer wavelength for the larger alloy NPs and vice-versa.
[Mh] Termos MeSH primário: Nanopartículas Metálicas/química
Paládio/química
Prata/química
[Mh] Termos MeSH secundário: Ligas
Óxido de Alumínio/química
Catálise
Difusão
Microscopia de Força Atômica
Microscopia Eletrônica de Varredura
Tamanho da Partícula
Porosidade
Ressonância de Plasmônio de Superfície
Propriedades de Superfície
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alloys); 3M4G523W1G (Silver); 5TWQ1V240M (Palladium); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180112
[Lr] Data última revisão:
180112
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171219
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189823


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[PMID]:28463814
[Au] Autor:Bahraminasab M; Ghaffari S; Eslami-Shahed H
[Ad] Endereço:Department of Tissue Engineering and Applied Cell Sciences, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran. Electronic address: m.bahraminasab@yahoo.com.
[Ti] Título:Al O -Ti functionally graded material prepared by spark plasma sintering for orthopaedic applications.
[So] Source:J Mech Behav Biomed Mater;72:82-89, 2017 Aug.
[Is] ISSN:1878-0180
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Orthopaedic prostheses still suffer from limited lifetime which imposes revision surgery with the associated risks involved. This, to some extent, is related to the vulnerability of the biomaterials used for their fabrication that are commonly single-constituent and uniform. Therefore, hybrid biomaterials such as composites and functionally graded materials (FGMs) are being developed to overcome the shortcomings of available biomaterials. The present paper focuses on the study of the structural, physical and mechanical properties of a FGM made of alumina-titanium fabricated by spark plasma sintering (SPS). The corresponding composites of the individual FGM layer were also fabricated. After sintering, the structural, mechanical and physical tests were carried out. The microstructural analysis using X-ray diffraction revealed the presence of Ti Al and TiAl in the composites, particularly with the increase of titanium content. Scanning electron micrographs revealed good adhesion and bonding between the two phases and between the FGM layers. The hardness and bending strength of the composites and FGM samples were tested and it was found that the increase in amount of Ti volume fraction decreases these properties monotonically. Furthermore, the sintering behaviour and fracture mechanisms of the FGM sample were studied and discussed.
[Mh] Termos MeSH primário: Óxido de Alumínio/análise
Materiais Biocompatíveis/análise
Ortopedia
Titânio/análise
[Mh] Termos MeSH secundário: Teste de Materiais
Desenho de Prótese
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biocompatible Materials); D1JT611TNE (Titanium); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171225
[Lr] Data última revisão:
171225
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE


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[PMID]:29173727
[Au] Autor:Stine KJ
[Ad] Endereço:University of Missouri-St. Louis, St. Louis, MO, United States.
[Ti] Título:Application of Porous Materials to Carbohydrate Chemistry and Glycoscience.
[So] Source:Adv Carbohydr Chem Biochem;74:61-136, 2017.
[Is] ISSN:2162-5530
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:There is a growing interest in using a range of porous materials to meet research needs in carbohydrate chemistry and glycoscience in general. Among the applications of porous materials reviewed in this chapter, enrichment of glycans from biological samples prior to separation and analysis by mass spectrometry is a major emphasis. Porous materials offer high surface area, adjustable pore sizes, and tunable surface chemistry for interacting with glycans, by boronate affinity, hydrophilic interactions, molecular imprinting, and polar interactions. Among the materials covered in this review are mesoporous silica and related materials, porous graphitic carbon, mesoporous carbon, porous polymers, and nanoporous gold. In some applications, glycans are enzymatically or chemically released from glycoproteins or glycopeptides, and the porous materials have the advantage of size selectivity admitting only the glycans into the pores and excluding proteins. Immobilization of lectins onto porous materials of suitable pore size allows for the use of lectin-carbohydrate interactions in capture or separation of glycoproteins. Porous material surfaces modified with carbohydrates can be used for the selective capture of lectins. Controlled release of therapeutics from porous materials mediated by glycans has been reported, and so has therapeutic targeting using carbohydrate-modified porous particles. Additional applications of porous materials in glycoscience include their use in the supported synthesis of oligosaccharides and in the development of biosensors for glycans.
[Mh] Termos MeSH primário: Óxido de Alumínio/química
Carbono/química
Ouro/química
Polímeros/química
Dióxido de Silício/química
Titânio/química
[Mh] Termos MeSH secundário: Carboidratos/química
Glicoproteínas/química
Tamanho da Partícula
Porosidade
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Carbohydrates); 0 (Glycoproteins); 0 (Polymers); 15FIX9V2JP (titanium dioxide); 7440-44-0 (Carbon); 7440-57-5 (Gold); 7631-86-9 (Silicon Dioxide); D1JT611TNE (Titanium); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171206
[Lr] Data última revisão:
171206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171128
[St] Status:MEDLINE


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[PMID]:28963148
[Au] Autor:Rajpura A; Board TN; Siney PD; Wynn Jones H; Williams S; Dabbs L; Wroblewski BM
[Ad] Endereço:Wrightington Hospital, Hall Lane, Appley Bridge, Wigan WN6 9EP, UK.
[Ti] Título:A 28-year clinical and radiological follow-up of alumina ceramic-on-crosslinked polyethylene total hip arthroplasty: a follow-up report and analysis of the oxidation of a shelf-aged acetabular component.
[So] Source:Bone Joint J;99-B(10):1286-1289, 2017 Oct.
[Is] ISSN:2049-4408
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:AIMS: Our aim in this study was to describe a continuing review of 11 total hip arthroplasties using 22.225 mm Alumina ceramic femoral heads on a Charnley flanged femoral component, articulating against a silane crosslinked polyethylene. PATIENTS AND METHODS: Nine patients (11 THAs) were reviewed at a mean of 27.5 years (26 to 28) post-operatively. Outcome was assessed using the d'Aubigne and Postel, and Charnley scores and penetration was recorded on radiographs. In addition, the oxidation of a 29-year-old shelf-aged acetabular component was analysed. RESULTS: The mean clinical outcome scores remained excellent at final follow-up. The mean total penetration remained 0.41 mm (0.40 to 0.41). There was no radiographic evidence of acetabular or femoral loosening or osteolysis. There was negligible oxidation in the shelf-aged sample despite gamma irradiation and storage in air. CONCLUSION: These results highlight the long-term stability and durability of this type of crosslinked, antioxidant containing polyethylene when used in combination with a small diameter alumina ceramic femoral head. Cite this article: 2017;99-B:1286-9.
[Mh] Termos MeSH primário: Acetábulo/diagnóstico por imagem
Óxido de Alumínio
Previsões
Prótese de Quadril
Polietileno
Complicações Pós-Operatórias/diagnóstico
Radiografia/métodos
[Mh] Termos MeSH secundário: Acetábulo/cirurgia
Adulto
Artroplastia de Quadril/métodos
Feminino
Seguimentos
Seres Humanos
Masculino
Meia-Idade
Estudos Prospectivos
Desenho de Prótese
Falha de Prótese
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
9002-88-4 (Polyethylene); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171012
[Lr] Data última revisão:
171012
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:171001
[St] Status:MEDLINE
[do] DOI:10.1302/0301-620X.99B10.BJJ-2017-0105.R1


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[PMID]:28867758
[Au] Autor:Janlamool J; Jongsomjit B
[Ad] Endereço:Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University.
[Ti] Título:Catalytic Ethanol Dehydration to Ethylene over Nanocrystalline χ- and γ-Al O Catalysts.
[So] Source:J Oleo Sci;66(9):1029-1039, 2017.
[Is] ISSN:1347-3352
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:The study is aimed to investigate the combination of nanocrystalline γ- and χ- alumina that displays the attractive chemical and physical properties for the catalytic dehydration of ethanol. The correlation between the acid density and ethanol conversion was observed. The high acid density apparently results in high catalytic activity, especially for the equally mixed γ- and χ- phase alumina (G50C50). In order to obtain a better understanding on how different catalysts would affect the ethylene yield, one of the most powerful techniques such as X-ray photoelectron spectroscopy (XPS) was performed. Hence, the different O 1s surface atoms can be identified and divided into three types including lattice oxygen (O, 530.7 eV), surface hydroxyl (OH, 532.1 eV) and lattice water (H O, 532.9 eV). It was remarkably found that the large amount of O 1s surface atoms in lattice water can result in increased ethylene yield. In summary, the appearance of metastable χ-alumina structure exhibited better catalytic activity and ethylene yield than γ- alumina. Thus, the introduction of metastable χ- alumina structure into γ- alumina enhanced catalytic activity and ethylene yield. As the result, it was found that the G50C50 catalyst exhibits the ethylene yield (80%) at the lowest reaction temperature ca. 250°C among other catalysts.
[Mh] Termos MeSH primário: Óxido de Alumínio/química
Etanol/química
Etilenos/síntese química
Nanopartículas/química
[Mh] Termos MeSH secundário: Catálise
Desidratação
Hidróxidos
Oxigênio
Espectroscopia Fotoeletrônica
Temperatura Ambiente
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ethylenes); 0 (Hydroxides); 059QF0KO0R (Water); 3K9958V90M (Ethanol); 9159UV381P (hydroxide ion); 91GW059KN7 (ethylene); LMI26O6933 (Aluminum Oxide); S88TT14065 (Oxygen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170905
[St] Status:MEDLINE
[do] DOI:10.5650/jos.ess17026


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[PMID]:28857493
[Au] Autor:Zhang J; Hultqvist A; Zhang T; Jiang L; Ruan C; Yang L; Cheng Y; Edoff M; Johansson EMJ
[Ad] Endereço:Physical Chemistry, Centre of Molecular Devices, Department of Chemistry, Ångström Laboratory, Uppsala University, SE-75120, Uppsala, Sweden.
[Ti] Título:Al O Underlayer Prepared by Atomic Layer Deposition for Efficient Perovskite Solar Cells.
[So] Source:ChemSusChem;10(19):3810-3817, 2017 Oct 09.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Perovskite solar cells, as an emergent technology for solar energy conversion, have attracted much attention in the solar cell community by demonstrating impressive enhancement in power conversion efficiencies. However, the high temperature and manually processed TiO underlayer prepared by spray pyrolysis significantly limit the large-scale application and device reproducibility of perovskite solar cells. In this study, lowtemperature atomic layer deposition (ALD) is used to prepare a compact Al O underlayer for perovskite solar cells. The thickness of the Al O layer can be controlled well by adjusting the deposition cycles during the ALD process. An optimal Al O layer effectively blocks electron recombination at the perovskite/fluorine-doped tin oxide interface and sufficiently transports electrons through tunneling. Perovskite solar cells fabricated with an Al O layer demonstrated a highest efficiency of 16.2 % for the sample with 50 ALD cycles (ca. 5 nm), which is a significant improvement over underlayer-free PSCs, which have a maximum efficiency of 11.0 %. Detailed characterization confirms that the thickness of the Al O underlayer significantly influences the charge transfer resistance and electron recombination processes in the devices. Furthermore, this work shows the feasibility of using a high band-gap semiconductor such as Al O as the underlayer in perovskite solar cells and opens up pathways to use ALD Al O underlayers for flexible solar cells.
[Mh] Termos MeSH primário: Óxido de Alumínio/química
Compostos de Cálcio/química
Fontes de Energia Elétrica
Óxidos/química
Energia Solar
Titânio/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Calcium Compounds); 0 (Oxides); 12194-71-7 (perovskite); D1JT611TNE (Titanium); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170901
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201701160


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[PMID]:28697430
[Au] Autor:Kim KJ; Jang A
[Ad] Endereço:Department of Water Resources, Graduate School of Water Resources, Sungkyunkwan University, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea.
[Ti] Título:Evaluation of natural organic matter adsorption on Fe-Al binary oxide: Comparison with single metal oxides.
[So] Source:Chemosphere;185:247-257, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The adsorption characteristics of three types of standard natural organic matter (NOM) on iron-aluminum (Fe-Al) binary oxide (FAO) and heated aluminum oxide (HAO) under natural surface water condition were investigated using various adsorption isotherms and kinetic models. FAO was synthesized by Fe oxide and Al oxide, mixed using the sol-gel hydrothermal method, and aluminum sulfate was used to make HAO. The amount of adsorbed NOM was increased to 79.6 mg g for humic acid (HA), 101.1 mg g for sodium alginate (SA) in the FAO, but the maximum adsorption capacity of bovine serum albumin (BSA) (461.3 mg g ) was identified on the HAO. The adsorption of HA, BSA, and SA dramatically increased (>70%) on FAO in 5 min and HA was significantly removed (90%) among the three NOM. Mutual interaction among the adsorbed NOM (BSA) occurred on the HAO surface during adsorption due to formation of monolayer by protein molecules at neutral pH. The pseudo second order clearly represented the adsorption kinetics for both adsorbents. The equilibrium isotherm data of FAO was better exhibited by the Langmuir isotherm model than by the Freundlich isotherm, but HAO was a slightly non-linear Langmuir type. Also, the free energy, enthalpy, and entropy of adsorption were determined from the thermodynamic experiments. Adsorption on FAO was spontaneous and an exothermic process. Fluorescence excitation-emission matrix (FEEM) spectra were used to elucidate the variation in organic components. The results obtained suggests that the significant changes in the surface property of the adsorbent (large surface area, increased crystalline intensity, and fine particle size) were effectively determined by the Fe-synthesized Al oxide mixed using the sol-gel hydrothermal method. The results also suggest that the changes enhanced the adsorption capacity, whereby three NOM were notably removed on FAO regardless of NOM characteristics (hydrophobic and hydrophilic).
[Mh] Termos MeSH primário: Substâncias Húmicas/análise
Óxidos
Termodinâmica
[Mh] Termos MeSH secundário: Adsorção
Óxido de Alumínio/química
Compostos Férricos/química
Cinética
Compostos Orgânicos/química
Óxidos/química
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ferric Compounds); 0 (Humic Substances); 0 (Organic Chemicals); 0 (Oxides); 1K09F3G675 (ferric oxide); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170712
[St] Status:MEDLINE


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[PMID]:28623798
[Au] Autor:Svartz G; Papa M; Gosatti M; Jordán M; Soldati A; Samter P; Guraya MM; Pérez Coll C; Perez Catán S
[Ad] Endereço:Instituto de Investigación e Ingeniería Ambiental and Escuela de Ciencia y Tecnología (UNSAM), Av. 25 de Mayo y Francia (C1650), San Martín, Buenos Aires, Argentina; CONICET, Argentina.
[Ti] Título:Monitoring the ecotoxicity of γ-Al O and Ni/γ-Al O nanomaterials by means of a battery of bioassays.
[So] Source:Ecotoxicol Environ Saf;144:200-207, 2017 Oct.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The increasing application of nanoparticles (NPs) to a variety of new technologies has become a matter of concern due to the potential toxicity of these materials. Many questions about the fate of NPs in the environment and the subsequent impact on ecosystems need to be answered. The aim of this work was to evaluate the ecotoxicity of two alumina-based nanoceramics, γ-Al2O3 (NC) and Ni/ γ-Al2O3 (NiNC) by means of three different standardized tests: Biochemical Oxygen Demand (BOD5), bioassay with luminescent bacteria (Vibrio fischeri; Microtox), and bioassay on amphibian larvae (Rhinella arenarum) (AMPHITOX). BOD5 values of a very biodegradable mixture (glucose/glutamic acid) decreased with the addition of NiNC(43.8%) and NC (31.6%) with respect to control samples (52.9%). Microtox test results indicated that NiNC presents higher toxicity than NC, with EC50s values of 16.1% and 29.9% respectively; a reduced toxicity was observed, however, in presence of organic matter, thus obtaining EC50s of 37.8% and 19.4%. The results of AMPHITOX test showed a significant increase in the toxicity of both substances over time, the NiNC toxicity being greater than that of NC. The values of 96h-LC50 and 504h-LC50 determined for NiNC were 1.58 and 0.83mg/L, respectively, and 14.5 and 10.5mg/L for NC samples. Amphibian larvae exhibited collapsed cavities, edema, axial flexures, and behavioral alterations as hyperkinesia and reduced movements. These results evidence the vulnerability of wildlife to xenobiotics and the need to develop specific standardized ecotoxicity tests in order to help environmental sustainability and natural species conservation.
[Mh] Termos MeSH primário: Aliivibrio fischeri/efeitos dos fármacos
Óxido de Alumínio/toxicidade
Monitoramento Ambiental/métodos
Larva/efeitos dos fármacos
Nanopartículas/toxicidade
Níquel/toxicidade
[Mh] Termos MeSH secundário: Animais
Bioensaio
Análise da Demanda Biológica de Oxigênio
Bufo marinus
Ecotoxicologia
Propriedades de Superfície
Xenobióticos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Xenobiotics); 7OV03QG267 (Nickel); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171110
[Lr] Data última revisão:
171110
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170618
[St] Status:MEDLINE


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[PMID]:28598342
[Au] Autor:Lu P; Amburgey JE; Hill VR; Murphy JL; Schneeberger CL; Arrowood MJ; Yuan T
[Ad] Endereço:Department of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China E-mail: lupingcumt@126.com; Civil and Environmental Engineering, University of North Carolina at Charlotte, Charlotte, NC 28223, USA.
[Ti] Título:Removals of cryptosporidium parvum oocysts and cryptosporidium-sized polystyrene microspheres from swimming pool water by diatomaceous earth filtration and perlite-sand filtration.
[So] Source:J Water Health;15(3):374-384, 2017 Jun.
[Is] ISSN:1477-8920
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Removal of Cryptosporidium-sized microspheres and Cryptosporidium parvum oocysts from swimming pools was investigated using diatomaceous earth (DE) precoat filtration and perlite-sand filtration. In pilot-scale experiments, microsphere removals of up to 2 log were obtained with 0.7 kg·DE/m at a filtration rate of 5 m/h. A slightly higher microsphere removal (2.3 log) was obtained for these DE-precoated filters when the filtration rate was 3.6 m/h. Additionally, pilot-scale perlite-sand filters achieved greater than 2 log removal when at least 0.37 kg/m of perlite was used compared to 0.1-0.4 log removal without perlite both at a surface loading rate of 37 m/h. Full-scale testing achieved 2.7 log of microspheres and oocysts removal when 0.7 kg·DE/m was used at 3.6 m/h. Removals were significantly decreased by a 15-minute interruption of the flow (without any mechanical agitation) to the DE filter in pilot-scale studies, which was not observed in full-scale filters. Microsphere removals were 2.7 log by perlite-sand filtration in a full-scale swimming pool filter operated at 34 m/h with 0.5 kg/m of perlite. The results demonstrate that either a DE precoat filter or a perlite-sand filter can improve the efficiency of removal of microspheres and oocysts from swimming pools over a standard sand filter under the conditions studied.
[Mh] Termos MeSH primário: Cryptosporidium parvum/isolamento & purificação
Filtração/métodos
Microesferas
Saúde Pública/métodos
Piscinas
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Óxido de Alumínio/química
Cryptosporidium parvum/crescimento & desenvolvimento
Terra de Diatomáceas/química
Oocistos
Poliestirenos/análise
Saúde Pública/instrumentação
Dióxido de Silício/química
Purificação da Água/instrumentação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Polystyrenes); 0SG101ZGK9 (Perlite); 61790-53-2 (Diatomaceous Earth); 7631-86-9 (Silicon Dioxide); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170610
[St] Status:MEDLINE
[do] DOI:10.2166/wh.2017.221



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