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[PMID]:28463291
[Au] Autor:Abdelsalam DG; Yasui T
[Ti] Título:High brightness, low coherence, digital holographic microscopy for 3D visualization of an in-vitro sandwiched biological sample.
[So] Source:Appl Opt;56(13):F1-F6, 2017 May 01.
[Is] ISSN:1539-4522
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:We achieve practically a bright-field digital holographic microscopy (DHM) configuration free from coherent noise for three-dimensional (3D) visualization of an in-vitro sandwiched sarcomere sample. Visualization of such sandwiched samples by conventional atomic force microscope (AFM) is impossible, while visualization using DHM with long coherent lengths is challenging. The proposed configuration is comprised of an ultrashort pulse laser source and a Mach-Zehnder interferometer in transmission. Periodically poled lithium niobate (PPLN) crystal was used to convert the fundamental beam by second harmonic generation (SHG) to the generated beam fit to the CCD camera used. The experimental results show that the contrast of the reconstructed phase image is improved to a higher degree compared to a He-Ne laser based result. We attribute this improvement to two things: the feature of the femtosecond pulse light, which acts as a chopper for coherent noise suppression, and the fact that the variance of a coherent mode can be reduced by a factor of 9 due to low loss through a nonlinear medium.
[Mh] Termos MeSH primário: Holografia/métodos
Imagem Tridimensional/métodos
Lasers
Microscopia de Interferência
Sarcômeros
[Mh] Termos MeSH secundário: Cristalização
Desenho de Equipamento
Aumento da Imagem/instrumentação
Aumento da Imagem/métodos
Interpretação de Imagem Assistida por Computador/métodos
Técnicas In Vitro
Interferometria
Nióbio
Óxidos
Sarcômeros/ultraestrutura
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Oxides); 05175J654G (Niobium); 12031-63-9 (lithium niobate)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180206
[Lr] Data última revisão:
180206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE
[do] DOI:10.1364/AO.56.0000F1


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[PMID]:29342150
[Au] Autor:Takematsu E; Noguchi K; Kuroda K; Ikoma T; Niinomi M; Matsushita N
[Ad] Endereço:Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas, United States of America.
[Ti] Título:In vivo osteoconductivity of surface modified Ti-29Nb-13Ta-4.6Zr alloy with low dissolution of toxic trace elements.
[So] Source:PLoS One;13(1):e0189967, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Simulated Body Fluid (SBF) has served as a useful standard to check the bioactivity of implant materials for years. However, it is not perfectly able to imitate human serum; sometimes disparities between the SBF test and animal test were confirmed. Therefore, to ensure the reliability of the results of the SBF test obtained from our previous study, an animal study was performed to check osteoconductivity of surface modified implant materials. Three types of solution processes, hydrothermal (H), electrochemical (E), and hydrothermal-electrochemical (HE), were performed on the Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) to improve its bioactivity, and their bioactivities were measured in vivo using bone-implant contacts (BICs). BICs of the HE- and H-treated samples were significantly higher than that of the control. Metal ion diffusion towards the bone was also evaluated to examine the adverse effect of metal ions. No metal ion diffusion was observed, indicating the safety of our solution processed implant materials.
[Mh] Termos MeSH primário: Regeneração Óssea
Nióbio/química
Tantálio/química
Titânio/química
Oligoelementos/farmacocinética
Zircônio/química
[Mh] Termos MeSH secundário: Animais
Ratos
Ratos Sprague-Dawley
Solubilidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Ti-29Nb-13Ta-4.6Zr alloy); 0 (Trace Elements); 05175J654G (Niobium); 6424HBN274 (Tantalum); C6V6S92N3C (Zirconium); D1JT611TNE (Titanium)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180129
[Lr] Data última revisão:
180129
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180118
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189967


  3 / 1096 MEDLINE  
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[PMID]:28877288
[Au] Autor:Gritti GC; Cavalcante SIA; Maia-Filho EM; Bauer J; Bandéca MC; Gavini G; Carvalho CN
[Ad] Endereço:Universidade Ceuma - UNICEUMA, São Luis, MA, Brazil.
[Ti] Título:Effect of rewetting solutions on micropush-out dentin bond strength of new bioceramic endodontic material.
[So] Source:Braz Oral Res;31:e76, 2017 Aug 31.
[Is] ISSN:1807-3107
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:To evaluate the influence of rewetting solutions on bond strength to root dentin of conventional gutta-percha (GP) or niobium phosphate glass-based gutta-percha (GNb) associated with a bioceramic sealer. The root canals of 80 human mandibular premolars were prepared using nickel-titanium instruments and irrigation with sodium hypochlorite and EDTA. The teeth were randomly divided into four groups according to the gutta-percha used: GNb or GP associated with EndoSequence BC Sealer (BC) and the solution for rewetting dentin before filling (distilled water; phosphate buffer saline solution - PBS; simulated body fluid - SBF; or no solution). The root canals were filled with a single cone using warm vertical condensation. Micropush-out bond strengths associated with the filling materials in slices from middle root thirds was determined 30 days after root filling. The failure mode was analyzed with stereoscopic lens. The data were statistically analyzed by two-way ANOVA and Holm-Sidak test (p < 0.05). There was significant difference in the types of gutta-percha (p < 0.001) and in the different rewetting solutions (p = 0.003). The interaction between gutta-percha and rewetting solutions was not significant (p = 0.53). The SBF solution provided an increase in bond strength for both gutta-percha solutions. The GNb+BC (3.42 MPa) association increased bond strength when compared with GP+BC (2.0 MPa). The use of SBF as a dentin rewetting solution increased bond strength in the groups studied. Association of GNb with bioceramic sealer was beneficial, increasing the bond strength to dentin when compared with the association with GP.
[Mh] Termos MeSH primário: Cerâmica/química
Colagem Dentária/métodos
Dentina/efeitos dos fármacos
Guta-Percha/química
Soluções/química
[Mh] Termos MeSH secundário: Análise de Variância
Materiais Biocompatíveis/química
Falha de Restauração Dentária
Dentina/química
Seres Humanos
Teste de Materiais
Nióbio/química
Valores de Referência
Reprodutibilidade dos Testes
Preparo de Canal Radicular/métodos
Estatísticas não Paramétricas
Propriedades de Superfície/efeitos dos fármacos
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biocompatible Materials); 0 (Solutions); 05175J654G (Niobium); 85422-94-2 (Glass ceramics); 9000-32-2 (Gutta-Percha)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171006
[Lr] Data última revisão:
171006
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:170907
[St] Status:MEDLINE


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[PMID]:28554024
[Au] Autor:Folens K; Du Laing G
[Ad] Endereço:Laboratory of Analytical Chemistry and Applied Ecochemistry, Department of Applied Analytical and Physical Chemistry, Ghent University, Coupure Links 653, 9000 Gent, Belgium. Electronic address: Karel.Folens@UGent.be.
[Ti] Título:Dispersion and solubility of In, Tl, Ta and Nb in the aquatic environment and intertidal sediments of the Scheldt estuary (Flanders, Belgium).
[So] Source:Chemosphere;183:401-409, 2017 Sep.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Certain specialty elements are indispensable in modern technologies for their particular properties. Yet, potential risks associated to the release of these elements at any stage, remains unknown. Therefore, the dispersion of indium (In), thallium (Tl), tantalum (Ta) and niobium (Nb) in the aquatic environment of the Scheldt estuary (Flanders, Belgium) was studied. Maximum concentrations in intertidal sediments of 101 ± 15 µg kg for In, 481 ± 37 µg kg for Tl, 88 ± 19 µg kg for Ta and 1162 ± 4 µg kg for Nb appeared on the sampling location closest to the river mouth, i.e. 57.5 km upstream. Their distribution in the intertidal sediments depends on the physicochemical sediment characteristics along the flow of the river Scheldt. The same was the case for most other metals and aluminum as their occurrence also correlated (p < 0.05) with the occurrence of In, Tl and Nb. While in general, studied elements correlate to the OM content and sulfur and phosphorus herein included, a relative enrichment of In, Tl and Nb was seen at Rupelmonde (92.0 km from the river mouth). Mainly the intertidal sediment silt fraction is capable of retaining the elements by exchanging with other ions in the mineral interlayer. Increasing salinity towards the river mouth can furthermore induce the formation of insoluble chloride species. Overall, the solubility of In, Tl, Ta and Nb appeared extremely low upon extraction of pore water from intertidal sediments saturated to 100% field capacity.
[Mh] Termos MeSH primário: Estuários
Sedimentos Geológicos/análise
Poluentes Químicos da Água
[Mh] Termos MeSH secundário: Bélgica
Monitoramento Ambiental
Sedimentos Geológicos/química
Índio/análise
Nióbio/análise
Rios/química
Solubilidade
Tantálio/análise
Tálio/análise
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 045A6V3VFX (Indium); 05175J654G (Niobium); 6424HBN274 (Tantalum); AD84R52XLF (Thallium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170929
[Lr] Data última revisão:
170929
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170530
[St] Status:MEDLINE


  5 / 1096 MEDLINE  
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[PMID]:28525874
[Au] Autor:Filella M; Rodríguez-Murillo JC
[Ad] Endereço:Institute F.-A. Forel, University of Geneva, Boulevard Carl-Vogt 66, CH-1205 Geneva, Switzerland. Electronic address: montserrat.filella@unige.ch.
[Ti] Título:Less-studied TCE: are their environmental concentrations increasing due to their use in new technologies?
[So] Source:Chemosphere;182:605-616, 2017 Sep.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The possible environmental impact of the recent increase in use of a group of technology-critical elements (Nb, Ta, Ga, In, Ge and Te) is analysed by reviewing published concentration profiles in environmental archives (ice cores, ombrotrophic peat bogs, freshwater sediments and moss surveys) and evaluating temporal trends in surface waters. No increase has so far been recorded. The low potential direct emissions of these elements, resulting from their absolute low production levels, make it unlikely that the increasing use of these elements in modern technology has any noticeable effect on their environmental concentrations on a global scale. This holds particularly true for those of these elements that are probably emitted in relatively high amounts from other human activities (i.e., coal combustion and non-ferrous smelting), such as In, the most studied element of the group.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Poluentes Ambientais/análise
Desenvolvimento Industrial/tendências
Metais Pesados/análise
[Mh] Termos MeSH secundário: Gálio
Germânio
Seres Humanos
Índio
Nióbio
Tantálio
Tecnécio
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Metals, Heavy); 00072J7XWS (Germanium); 045A6V3VFX (Indium); 05175J654G (Niobium); 6424HBN274 (Tantalum); 7440-26-8 (Technetium); CH46OC8YV4 (Gallium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170520
[St] Status:MEDLINE


  6 / 1096 MEDLINE  
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[PMID]:28511933
[Au] Autor:Lv K; Yang CT; Han J; Hu S; Wang XL
[Ad] Endereço:Radiochemistry Lab, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, China.
[Ti] Título:An initial demonstration of hierarchically porous niobium alkylphosphonates coordination polymers as potent radioanalytical separation materials.
[So] Source:J Chromatogr A;1504:35-45, 2017 Jun 30.
[Is] ISSN:1873-3778
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Combining the merits of soft-templating and perchlorate oxidation methods, the first-case investigation of niobium alkylphosphonates has uncovered their unique morphology, backbone composition, thermal behavior and huge potentiality as radioanalytical separation materials. These hierarchically porous solids are random aggregates of densely stacked nanolayers perforated with worm-like holes or vesicular voids, manifesting the massif-, tower-like "polymer brush" elevated up to ∼150nm driven by the minimal surface free energy principle. These coordination polymers consist of distorted niobium (V) ions strongly linked with tetrahedral alkylphosphonate building units, exposing uncoordinated phosphonate moieties and defective metal sites. Despite the amorphous features, they demonstrate multimodal porosity covering continuous micropores, segregated mesopores and fractional macropores, beneficial for the sequestration by active Lewis acid-base center. Evidenced by the maximum distribution coefficients of thorium, lanthanides reaching 9.0×10 , 9.5×10 mLg and large separation factor at pH≤1 20-element cocktail, this category of niobium alkylphosphonates are capable of harvesting thorium, lanthanides directly from the radionuclide surrogate, comparable to or even surpass the performance of the metal (IV) arylphosphonates counterparts. They also display appreciable SF ∼20 in 1molL HNO , shedding light on dual approaches to achieve the isolation of americium from curium. A combinatorial radioanalytical separation protocol has been proposed to enrich thorium and europium, revealing facile utilization of these highly stable, phosphonated hybrids in sustainable development of radioanalytical separation.
[Mh] Termos MeSH primário: Nióbio/química
Polímeros/química
Tório/isolamento & purificação
[Mh] Termos MeSH secundário: Elementos da Série dos Lantanídeos/química
Elementos da Série dos Lantanídeos/isolamento & purificação
Ácidos de Lewis/química
Organofosfonatos/química
Porosidade
Tório/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Lanthanoid Series Elements); 0 (Lewis Acids); 0 (Organophosphonates); 0 (Polymers); 05175J654G (Niobium); 60YU5MIG9W (Thorium)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171103
[Lr] Data última revisão:
171103
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170518
[St] Status:MEDLINE


  7 / 1096 MEDLINE  
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[PMID]:28415471
[Au] Autor:Fischer M; Laheurte P; Acquier P; Joguet D; Peltier L; Petithory T; Anselme K; Mille P
[Ad] Endereço:LEM3, Université de Lorraine, Ile du Saulcy, 57045 Metz, France.
[Ti] Título:Synthesis and characterization of Ti-27.5Nb alloy made by CLAD® additive manufacturing process for biomedical applications.
[So] Source:Mater Sci Eng C Mater Biol Appl;75:341-348, 2017 Jun 01.
[Is] ISSN:1873-0191
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Biocompatible beta-titanium alloys such as Ti-27.5(at.%)Nb are good candidates for implantology and arthroplasty applications as their particular mechanical properties, including low Young's modulus, could significantly reduce the stress-shielding phenomenon usually occurring after surgery. The CLAD® process is a powder blown additive manufacturing process that allows the manufacture of patient specific (i.e. custom) implants. Thus, the use of Ti-27.5(at.%)Nb alloy formed by CLAD® process for biomedical applications as a mean to increase cytocompatibility and mechanical biocompatibility was investigated in this study. The microstructural properties of the CLAD-deposited alloy were studied with optical microscopy and electron back-scattered diffraction (EBSD) analysis. The conservation of the mechanical properties of the Ti-27.5Nb material after the transformation steps (ingot-powder atomisation-CLAD) were verified with tensile tests and appear to remain close to those of reference material. Cytocompatibility of the material and subsequent cell viability tests showed that no cytotoxic elements are released in the medium and that viable cells proliferated well.
[Mh] Termos MeSH primário: Ligas
Implantes Experimentais
Teste de Materiais
Células Mesenquimais Estromais/metabolismo
Nióbio
Titânio
[Mh] Termos MeSH secundário: Ligas/síntese química
Ligas/química
Ligas/farmacologia
Linhagem Celular
Seres Humanos
Células Mesenquimais Estromais/citologia
Nióbio/química
Nióbio/farmacologia
Titânio/química
Titânio/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alloys); 05175J654G (Niobium); D1JT611TNE (Titanium)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170724
[Lr] Data última revisão:
170724
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170419
[St] Status:MEDLINE


  8 / 1096 MEDLINE  
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[PMID]:28269741
[Au] Autor:Lee S; Ueda K; Narushima T; Nakano T; Kasuga T
[Ad] Endereço:Division of Advanced Ceramics, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan.
[Ti] Título:Preparation of orthophosphate glasses in the MgO-CaO-SiO2-Nb2O5-P2O5 system.
[So] Source:Biomed Mater Eng;28(1):23-30, 2017.
[Is] ISSN:1878-3619
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Niobia/magnesia-containing orthophosphate invert glasses were successfully prepared in our earlier work. Orthophosphate groups in the glasses were cross-linked by tetrahedral niobia (NbO4) and magnesia. OBJECTIVE: The aim of this work is to prepare calcium orthophosphate invert glasses containing magnesia and niobia, incorporating silica, and to evaluate their structures and releasing behaviors. METHOD: The glasses were prepared by melt-quenching, and their structures and ion-releasing behaviors were evaluated. RESULTS: 31P solid-state nuclear magnetic resonance (NMR) and Raman spectroscopies showed the glasses consist of orthophosphate (PO4), orthosilicate (SiO4), and NbO4 tetrahedra. NbO4 and MgO in the glasses act as network formers. By incorporating SiO2 into the glasses, the chemical durability of the glasses was slightly improved. The glasses reheated at 800°C formed the orthophosphate crystalline phases, such as ß-Ca3(PO4)2, Mg3(PO4)2 and Mg3Ca3(PO4)4 in the glasses. The chemical durability of the crystallized glasses was slightly improved. CONCLUSIONS: Orthosilicate groups and NbO4 in the glasses coordinated with each other to form Si-O-Nb bonds. The chemical durability of the glasses was slightly improved by addition of SiO2, since the field strength of Si is larger than that of Ca or Mg.
[Mh] Termos MeSH primário: Compostos de Cálcio/química
Vidro/química
Óxido de Magnésio/química
Nióbio/química
Óxidos/química
Fosfatos/química
Compostos de Fósforo/química
Dióxido de Silício/química
[Mh] Termos MeSH secundário: Materiais Biocompatíveis/química
Cristalização
Calefação
Espectroscopia de Ressonância Magnética
Teste de Materiais
Análise Espectral Raman
Propriedades de Superfície
Temperatura de Transição
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biocompatible Materials); 0 (Calcium Compounds); 0 (Oxides); 0 (Phosphates); 0 (Phosphorus Compounds); 05175J654G (Niobium); 3A3U0GI71G (Magnesium Oxide); 51SWB7223J (phosphorus pentoxide); 7631-86-9 (Silicon Dioxide); C7X2M0VVNH (lime); K9343U17IN (niobium pentoxide)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170309
[St] Status:MEDLINE
[do] DOI:10.3233/BME-171652


  9 / 1096 MEDLINE  
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[PMID]:28183670
[Au] Autor:Markhoff J; Weinmann M; Schulze C; Bader R
[Ad] Endereço:University Medicine Rostock, Department of Orthopedics, Biomechanics and Implant Technology Laboratory, Doberaner Strasse 142, 18057 Rostock, Germany. Electronic address: markhoffj@gmail.com.
[Ti] Título:Influence of different grained powders and pellets made of Niobium and Ti-42Nb on human cell viability.
[So] Source:Mater Sci Eng C Mater Biol Appl;73:756-766, 2017 Apr 01.
[Is] ISSN:1873-0191
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Nowadays, biomaterials can be used to maintain or replace several functions of the human body if necessary. Titanium and its alloys, i.e. Ti6Al4V are the most common materials (70 to 80%) used for structural orthopedic implants due to their unique combination of good mechanical properties, corrosion resistance and biocompatibility. Addition of ß-stabilizers, e.g. niobium, can improve the mechanical properties of such titanium alloys further, simultaneously offering excellent biocompatibility. In this in vitro study, human osteoblasts and fibroblasts were cultured on different niobium specimens (Nb Amperit, Nb Ampertec), Nb sheets and Ti-42Nb (sintered and 3D-printed by selective laser melting, SLM) and compared with forged Ti6Al4V specimens. Furthermore, human osteoblasts were incubated with particulates of the Nb and Ti-42Nb specimens in three concentrations over four and seven days to imitate influence of wear debris. Thereby, the specimens with the roughest surfaces, i.e. Ti-42Nb and Nb Ampertec, revealed excellent and similar results for both cell types concerning cell viability and collagen synthesis superior to forged Ti6Al4V. Examinations with particulate debris disclosed a dose-dependent influence of all powders with Nb Ampertec showing the highest decrease of cell viability and collagen synthesis. Furthermore, interleukin synthesis was only slightly increased for all powders. In summary, Nb Ampertec (sintered Nb) and Ti-42Nb materials seem to be promising alternatives for medical applications compared to common materials like forged or melted Ti6Al4V.
[Mh] Termos MeSH primário: Ligas/farmacologia
Fibroblastos/citologia
Nióbio/farmacologia
Osteoblastos/citologia
[Mh] Termos MeSH secundário: Sobrevivência Celular/efeitos dos fármacos
Colágeno Tipo I/metabolismo
Fibroblastos/efeitos dos fármacos
Fibroblastos/metabolismo
Seres Humanos
Interleucina-6/biossíntese
Interleucina-8/biossíntese
Microscopia Eletrônica de Varredura
Osteoblastos/efeitos dos fármacos
Osteoblastos/metabolismo
Tamanho da Partícula
Pós
Titânio/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alloys); 0 (Collagen Type I); 0 (Interleukin-6); 0 (Interleukin-8); 0 (Powders); 0 (Ti-42Nb alloy); 05175J654G (Niobium); 12743-70-3 (titanium alloy (TiAl6V4)); D1JT611TNE (Titanium)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170903
[Lr] Data última revisão:
170903
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170211
[St] Status:MEDLINE


  10 / 1096 MEDLINE  
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[PMID]:28129621
[Au] Autor:Xu L; Liang G; Yin M
[Ad] Endereço:School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin 300072, PR China. Electronic address: xuli620@163.com.
[Ti] Título:A promising electrode material modified by Nb-doped TiO nanotubes for electrochemical degradation of AR 73.
[So] Source:Chemosphere;173:425-434, 2017 Apr.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A distinctive SnO Sb electrode with highly ordered Nb doped TiO nanotubes sheet as a new substrate, obtained by NbTi alloy anodization, is prepared by pulse electrochemical deposition for the first time as electrocatalytic oxidation anode for wastewater treatment. The novel electrode has a larger surface area and smaller crystallite particles than conventional SnO Sb electrodes as obtained from the analysis of scanning electron microscopy and X-ray diffraction. Compared with Ti/SnO Sb and Ti/TiO -NTs/SnO Sb prepared by pulse electrochemical deposition, the electrode modified by NbTiO -NTs has the higher oxygen evolution potential of 2.29 V (vs. Ag/AgCl), and the lower charge transfer resistance, which decreased by 65% and 79%. The service lifetime of NbTi/NbTiO -NTs/SnO Sb is 4.9 times longer than that of Ti/SnO Sb and 1.9 times longer than that of Ti/TiO -NTs/SnO Sb. The new electrode is proved to have an excellent electrochemical oxidation and degradation ability using Acid Red 73 as a target organic pollutant. The AR 73 removal, chemical oxygen demand removal and kinetic rate constant are increased obviously due to the introduction of NbTiO -NTs. Besides, the energy consumption reduces 37.2% and 31.4% in contrast with Ti/SnO Sb and Ti/TiO -NTs/SnO Sb. Hence, the Ti/SnO Sb modified by NbTiO -NTs is a very promising anode material for the electrochemical treatment of dye wastewater.
[Mh] Termos MeSH primário: Eletrodos
Nanotubos/química
Nióbio/química
Titânio/química
[Mh] Termos MeSH secundário: Antimônio/química
Compostos Azo/química
Corantes/química
Técnicas Eletroquímicas
Naftalenossulfonatos/química
Oxirredução
Estanho/química
Eliminação de Resíduos Líquidos/métodos
Águas Residuais
Poluentes Químicos da Água/química
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Azo Compounds); 0 (Coloring Agents); 0 (Naphthalenesulfonates); 0 (Waste Water); 0 (Water Pollutants, Chemical); 05175J654G (Niobium); 15FIX9V2JP (titanium dioxide); 5PLA82FV3C (brilliant crocein); 7440-31-5 (Tin); 9IT35J3UV3 (Antimony); D1JT611TNE (Titanium)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170128
[St] Status:MEDLINE



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