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[PMID]:28855109
[Au] Autor:Li H; Kim HW; Shin SE; Seo MS; An JR; Ha KS; Han ET; Hong SH; Firth AL; Choi IW; Han IY; Lee DS; Yim MJ; Park WS
[Ad] Endereço:Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, South Korea.
[Ti] Título:The vasorelaxant effect of mitiglinide via activation of voltage-dependent K channels and SERCA pump in aortic smooth muscle.
[So] Source:Life Sci;188:1-9, 2017 Nov 01.
[Is] ISSN:1879-0631
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:AIMS: The vasorelaxant effects of the anti-diabetic drug, mitiglinide in phenylephrine (Phe)-pre-contracted aortic rings were examined. MATERIALS AND METHODS: Arterial tone measurement was performed in aortic smooth muscle cells. KEY FINDINGS: Mitiglinide dose-dependently induced vasorelaxation. Application of the large-conductance Ca -activated K (BK ) channel blocker paxilline, inwardly rectifying K (Kir) channel blocker Ba , and ATP-sensitive K (K ) channel blocker glibenclamide did not affect the vasorelaxant effect of mitiglinide. However, application of the voltage-dependent K (Kv) channel blocker 4-AP, effectively inhibited mitiglinide-induced vasorelaxation. Although pretreatment with the Ca channel blocker nifedipine did not alter the mitiglinide-induced vasorelaxation, pretreatment with the sarcoplasmic/endoplasmic reticulum Ca -ATPase (SERCA) pump inhibitor thapsigargin and cyclopiazonic acid reduced the vasorelaxant effect of mitiglinide. In addition, the vasorelaxant effect of mitiglinide was not affected by the inhibitors of adenylyl cyclase, protein kinase A, guanylyl cyclase, or protein kinase G. Elimination of the endothelium and inhibition of endothelium-dependent vasorelaxant mechanisms also did not change the vasorelaxant effect of mitiglinide. SIGNIFICANCE: We proposed that mitiglinide induces vasorelaxation via activation of Kv channels and SERCA pump. However, the vasorelaxant effects of mitiglinide did not involve other K channels, Ca channels, PKA/PKG signaling pathways, or the endothelium.
[Mh] Termos MeSH primário: Aorta Torácica/fisiologia
Isoindóis/farmacologia
Músculo Liso/fisiologia
Canais de Potássio de Abertura Dependente da Tensão da Membrana/agonistas
ATPases Transportadoras de Cálcio do Retículo Sarcoplasmático/fisiologia
Vasodilatadores/farmacologia
[Mh] Termos MeSH secundário: 4-Aminopiridina/farmacologia
Adenina/análogos & derivados
Adenina/farmacologia
Animais
Aorta Torácica/efeitos dos fármacos
Bário/farmacologia
Carbazóis/farmacologia
Relação Dose-Resposta a Droga
Interações Medicamentosas
Endotélio Vascular/efeitos dos fármacos
Glibureto/farmacologia
Indóis/farmacologia
Isoindóis/antagonistas & inibidores
Masculino
Músculo Liso/efeitos dos fármacos
Nifedipino/farmacologia
Oxidiazóis/farmacologia
Fenilefrina/farmacologia
Pirróis/farmacologia
Quinoxalinas/farmacologia
Coelhos
ATPases Transportadoras de Cálcio do Retículo Sarcoplasmático/antagonistas & inibidores
Transdução de Sinais/efeitos dos fármacos
Tapsigargina/farmacologia
Vasodilatadores/antagonistas & inibidores
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (1H-(1,2,4)oxadiazolo(4,3-a)quinoxalin-1-one); 0 (Carbazoles); 0 (Indoles); 0 (Isoindoles); 0 (Oxadiazoles); 0 (Potassium Channels, Voltage-Gated); 0 (Pyrroles); 0 (Quinoxalines); 0 (Vasodilator Agents); 126643-37-6 (KT 5823); 17318-31-9 (9-(tetrahydro-2-furyl)-adenine); 1WS297W6MV (Phenylephrine); 24GP945V5T (Barium); 3T9U9Z96L7 (paxilline); 58HV29I28S (KT 5720); 67526-95-8 (Thapsigargin); BH3B64OKL9 (4-Aminopyridine); D86I0XLB13 (mitiglinide); EC 3.6.3.8 (Sarcoplasmic Reticulum Calcium-Transporting ATPases); I9ZF7L6G2L (Nifedipine); JAC85A2161 (Adenine); SX6K58TVWC (Glyburide); X9TLY4580Z (cyclopiazonic acid)
[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:170901
[St] Status:MEDLINE


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[PMID]:28838766
[Au] Autor:Tonelli M; Wiebe N; Bello A; Field CJ; Gill JS; Hemmelgarn BR; Holmes DT; Jindal K; Klarenbach SW; Manns BJ; Thadhani R; Kinniburgh D; Alberta Kidney Disease Network
[Ad] Endereço:Department of Medicine, University of Calgary, Calgary, Canada. Electronic address: tonelli.admin@ucalgary.ca.
[Ti] Título:Concentrations of Trace Elements in Hemodialysis Patients: A Prospective Cohort Study.
[So] Source:Am J Kidney Dis;70(5):696-704, 2017 Nov.
[Is] ISSN:1523-6838
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Low concentrations and excessive concentrations of trace elements have been commonly reported in hemodialysis patients, but available studies have several important limitations. STUDY DESIGN: Random sample of patients drawn from a prospective cohort. SETTING & PARTICIPANTS: 198 incident hemodialysis patients treated in 3 Canadian centers. MEASUREMENTS: We used mass spectrometry to measure plasma concentrations of the 25 elements at baseline, 6 months, 1 year, and 2 years following enrollment in the cohort. We focused on low concentrations of zinc, selenium, and manganese and excessive concentrations of lead, arsenic, and mercury; low and excessive concentrations of the other 19 trace elements were treated as exploratory analyses. Low and excessive concentrations were based on the 5th and 95th percentile plasma concentrations from healthy reference populations. RESULTS: At all 4 occasions, low zinc, selenium, and manganese concentrations were uncommon in study participants (≤5.1%, ≤1.8%, and ≤0.9% for zinc, selenium, and manganese, respectively) and a substantial proportion of participants had concentrations that exceeded the 95th percentile (≥65.2%, ≥74.2%, and ≥19.7%, respectively). Almost all participants had plasma lead concentrations above the 95th percentile at all time points. The proportion of participants with plasma arsenic concentrations exceeding the 95th percentile was relatively constant over time (9.1%-9.8%); the proportion with plasma mercury concentrations that exceeded the 95th percentile varied between 15.2% and 29.3%. Low arsenic, platinum, tungsten, and beryllium concentrations were common (>50%), as were excessive cobalt, manganese, zinc, vanadium, cadmium, selenium, barium, antimony, nickel, molybdenum, lead, and chromium concentrations. CONCLUSIONS: There was no evidence that low zinc, selenium, or manganese concentrations exist in most contemporary Canadian hemodialysis patients. Some patients have excessive plasma arsenic and mercury concentrations, and excessive lead concentrations were common. These findings require further investigation.
[Mh] Termos MeSH primário: Falência Renal Crônica/sangue
Oligoelementos/sangue
[Mh] Termos MeSH secundário: Adolescente
Adulto
Idoso
Antimônio/sangue
Arsênico/sangue
Bário/sangue
Berílio/sangue
Cádmio/sangue
Cromo/sangue
Cobalto/sangue
Estudos de Coortes
Feminino
Seres Humanos
Falência Renal Crônica/terapia
Chumbo/sangue
Masculino
Manganês/sangue
Espectrometria de Massas
Mercúrio/sangue
Meia-Idade
Molibdênio/sangue
Níquel/sangue
Platina/sangue
Estudos Prospectivos
Diálise Renal
Selênio/sangue
Tungstênio/sangue
Vanádio/sangue
Adulto Jovem
Zinco/sangue
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Trace Elements); 00BH33GNGH (Cadmium); 00J9J9XKDE (Vanadium); 0R0008Q3JB (Chromium); 24GP945V5T (Barium); 2P299V784P (Lead); 3G0H8C9362 (Cobalt); 42Z2K6ZL8P (Manganese); 49DFR088MY (Platinum); 7OV03QG267 (Nickel); 81AH48963U (Molybdenum); 9IT35J3UV3 (Antimony); FXS1BY2PGL (Mercury); H6241UJ22B (Selenium); J41CSQ7QDS (Zinc); N712M78A8G (Arsenic); OW5102UV6N (Beryllium); V9306CXO6G (Tungsten)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171030
[Lr] Data última revisão:
171030
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170826
[St] Status:MEDLINE


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[PMID]:28782914
[Au] Autor:Haribal VP; He F; Mishra A; Li F
[Ad] Endereço:Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, NC, 27695-7905, USA.
[Ti] Título:Iron-Doped BaMnO for Hybrid Water Splitting and Syngas Generation.
[So] Source:ChemSusChem;10(17):3402-3408, 2017 Sep 11.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:A rationalized strategy to optimize transition-metal-oxide-based redox catalysts for water splitting and syngas generation through a hybrid solar-redox process is proposed and validated. Monometallic transition metal oxides do not possess desirable properties for water splitting; however, density functional theory calculations indicate that the redox properties of perovskite-structured BaMn Fe O can be varied by changing the B-site cation compositions. Specifically, BaMn Fe O is projected to be suitable for the hybrid solar-redox process. Experimental studies confirm such predictions, demonstrating 90 % steam-to-hydrogen conversion in water splitting and over 90 % syngas yield in the methane partial-oxidation step after repeated redox cycles. Compared to state-of-the-art solar-thermal water-splitting catalysts, the rationally designed redox catalyst reported is capable of splitting water at a significantly lower temperature and with ten-fold increase in steam-to-hydrogen conversion. Process simulations indicate the potential to operate the hybrid solar-redox process at a higher efficiency than state-of-the-art hydrogen and liquid-fuel production processes with 70 % lower CO emissions for hydrogen production.
[Mh] Termos MeSH primário: Bário/química
Gases/química
Germânio/química
Ferro/química
Água/química
[Mh] Termos MeSH secundário: Catálise
Hidrogênio/química
Oxirredução
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Gases); 0 (barium metagermanate); 00072J7XWS (Germanium); 059QF0KO0R (Water); 24GP945V5T (Barium); 7YNJ3PO35Z (Hydrogen); E1UOL152H7 (Iron)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170918
[Lr] Data última revisão:
170918
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170808
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201700699


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[PMID]:28758646
[Au] Autor:Geneste G; Hermet J; Dezanneau G
[Ad] Endereço:CEA, DAM, DIF, F-91297 Arpajon, France. gregory.geneste@cea.fr.
[Ti] Título:Reply to the 'Comment on "Proton transport in barium stannate: classical, semi-classical and quantum regime"'.
[So] Source:Phys Chem Chem Phys;19(31):21191-21209, 2017 08 09.
[Is] ISSN:1463-9084
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:We respond to the erroneous criticisms about our modeling of proton transport in barium stannate [G. Geneste et al., Phys. Chem. Chem. Phys., 2015, 17, 19104]. In this previous work, we described, on the basis of density-functional calculations, proton transport in the classical and semi-classical regimes, and provided arguments in favor of an adiabatic picture for proton transfer at low temperature. We re-explain here our article (with more detail and precision), the content of which has been distorted in the Comment, and reiterate our arguments in this reply. We refute all criticisms. They are completely wrong in the context of our article. Even though a few of them are based on considerations probably true in some metals, they make no sense here since they do not correspond to the content of our work. It has not been understood in the Comment that two competitive configurations, associated with radically different transfer mechanisms, have been studied in our work. It has also not been understood in the Comment that the adiabatic regime described for transfer occurs in the protonic ground state, in a very-low barrier configuration with the protonic ground state energy larger than the barrier. Serious confusion has been made in the Comment with the case of H in metals like Nb or Ta, leading to the introduction of the notion of (protonic) "excited-state proton transfer", relevant for H in some metals, but (i) that does not correspond to the (ground state) adiabatic transfers here described, and (ii) that does not correspond to what is commonly described as the "adiabatic limit for proton transfer" in the scientific literature. We emphasize, accordingly, the large differences between proton transfer in the present oxide and hydrogen jumps in metals like Nb or Ta, and the similarities between proton transfer in the present oxide and in acid-base solutions. We finally describe a scenario for proton transfer in the present oxide regardless of the temperature regime.
[Mh] Termos MeSH primário: Bário
Prótons
[Mh] Termos MeSH secundário: Transporte de Íons
Teoria Quântica
[Pt] Tipo de publicação:JOURNAL ARTICLE; COMMENT
[Nm] Nome de substância:
0 (Protons); 24GP945V5T (Barium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170918
[Lr] Data última revisão:
170918
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170801
[St] Status:MEDLINE
[do] DOI:10.1039/c7cp02385e


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[PMID]:28699824
[Au] Autor:Alizadeh Sardroud H; Nemati S; Baradar Khoshfetrat A; Nabavinia M; Beygi Khosrowshahi Y
[Ad] Endereço:a Chemical Engineering Faculty , Sahand University of Technology , Tabriz , Iran.
[Ti] Título:Barium-cross-linked alginate-gelatine microcapsule as a potential platform for stem cell production and modular tissue formation.
[So] Source:J Microencapsul;34(5):488-497, 2017 Aug.
[Is] ISSN:1464-5246
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Influence of gelatine concentration and cross-linker ions of Ca and Ba was evaluated on characteristics of alginate hydrogels and proliferation behaviours of model adherent and suspendable stem cells of fibroblast and U937 embedded in alginate microcapsules. Increasing gelatine concentration to 2.5% increased extent of swelling to 15% and 25% for barium- and calcium-cross-linked hydrogels, respectively. Mechanical properties also decreased with increasing swelling of hydrogels. Both by increasing gelatine concentration and using barium ions increased considerably the proliferation of encapsulated model stem cells. Barium-cross-linked alginate-gelatine microcapsule tested for bone building block showed a 13.5 ± 1.5-fold expansion for osteoblast cells after 21 days with deposition of bone matrix. The haematopoietic stem cells cultured in the microcapsule after 7 days also showed up to 2-fold increase without adding any growth factor. The study demonstrates that barium-cross-linked alginate-gelatine microcapsule has potential for use as a simple and efficient 3D platform for stem cell production and modular tissue formation.
[Mh] Termos MeSH primário: Alginatos/química
Bário/química
Gelatina/química
Células-Tronco/citologia
Tecidos Suporte
[Mh] Termos MeSH secundário: Cápsulas
Fibroblastos/citologia
Ácidos Hexurônicos
Seres Humanos
Hidrogéis/química
Células U937
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alginates); 0 (Capsules); 0 (Hexuronic Acids); 0 (Hydrogels); 24GP945V5T (Barium); 9000-70-8 (Gelatin)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171026
[Lr] Data última revisão:
171026
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170713
[St] Status:MEDLINE
[do] DOI:10.1080/02652048.2017.1354940


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[PMID]:28683124
[Au] Autor:Clark DP; Badea CT
[Ad] Endereço:Center for In Vivo Microscopy, Department of Radiology, Duke University Medical Center, Durham, NC, United States of America.
[Ti] Título:Hybrid spectral CT reconstruction.
[So] Source:PLoS One;12(7):e0180324, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Current photon counting x-ray detector (PCD) technology faces limitations associated with spectral fidelity and photon starvation. One strategy for addressing these limitations is to supplement PCD data with high-resolution, low-noise data acquired with an energy-integrating detector (EID). In this work, we propose an iterative, hybrid reconstruction technique which combines the spectral properties of PCD data with the resolution and signal-to-noise characteristics of EID data. Our hybrid reconstruction technique is based on an algebraic model of data fidelity which substitutes the EID data into the data fidelity term associated with the PCD reconstruction, resulting in a joint reconstruction problem. Within the split Bregman framework, these data fidelity constraints are minimized subject to additional constraints on spectral rank and on joint intensity-gradient sparsity measured between the reconstructions of the EID and PCD data. Following a derivation of the proposed technique, we apply it to the reconstruction of a digital phantom which contains realistic concentrations of iodine, barium, and calcium encountered in small-animal micro-CT. The results of this experiment suggest reliable separation and detection of iodine at concentrations ≥ 5 mg/ml and barium at concentrations ≥ 10 mg/ml in 2-mm features for EID and PCD data reconstructed with inherent spatial resolutions of 176 µm and 254 µm, respectively (point spread function, FWHM). Furthermore, hybrid reconstruction is demonstrated to enhance spatial resolution within material decomposition results and to improve low-contrast detectability by as much as 2.6 times relative to reconstruction with PCD data only. The parameters of the simulation experiment are based on an in vivo micro-CT experiment conducted in a mouse model of soft-tissue sarcoma. Material decomposition results produced from this in vivo data demonstrate the feasibility of distinguishing two K-edge contrast agents with a spectral separation on the order of the energy resolution of the PCD hardware.
[Mh] Termos MeSH primário: Meios de Contraste/farmacocinética
Fótons
Interpretação de Imagem Radiográfica Assistida por Computador/métodos
Sarcoma/diagnóstico por imagem
Neoplasias de Tecidos Moles/diagnóstico por imagem
[Mh] Termos MeSH secundário: Animais
Bário/farmacocinética
Cálcio/farmacocinética
Iodo/farmacocinética
Camundongos
Imagens de Fantasmas
Sarcoma/patologia
Neoplasias de Tecidos Moles/patologia
Tomografia Computadorizada por Raios X/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Contrast Media); 24GP945V5T (Barium); 9679TC07X4 (Iodine); SY7Q814VUP (Calcium)
[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:170707
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0180324


  7 / 6920 MEDLINE  
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[PMID]:28644080
[Au] Autor:Doss GA; Williams JM; Mans C
[Ti] Título:Determination of Gastrointestinal Transit Times in Barred Owls ( Strix varia ) by Contrast Fluoroscopy.
[So] Source:J Avian Med Surg;31(2):123-127, 2017 Jun.
[Is] ISSN:1082-6742
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Contrast imaging studies are routinely performed in avian patients when an underlying abnormality of the gastrointestinal (GI) tract is suspected. Fluoroscopy offers several advantages over traditional radiography and can be performed in conscious animals with minimal stress and restraint. Although birds of prey are commonly encountered as patients, little is known about GI transit times and contrast imaging studies in these species, especially owls. Owls are commonly encountered in zoological, educational, and wildlife settings. In this study, 12 adult barred owls ( Strix varia ) were gavage fed a 30% weight-by-volume barium suspension (25 mL/kg body weight). Fluoroscopic exposures were recorded at 5, 15, 30, 60, 120, 180, 240, and 300 minutes after administration. Overall GI transit time and transit times of various GI organs were recorded. Median (interquartile range [IQR]) overall GI transit time was 60 minutes (IQR: 19-60 minutes) and ranged from 5-120 minutes. Ventricular and small intestinal contrast filling was rapid. Ventricular emptying was complete by a median of 60 minutes (IQR: 30-120 minutes; range: 30-240 minutes), whereas small intestinal emptying was not complete in 9/12 birds by 300 minutes. Median small intestinal contraction rate was 15 per minute (IQR: 13-16 minutes; range: 10-19 minutes). Median overall GI transit time in barred owls is more rapid than mean transit times reported for psittacine birds and red-tailed hawks ( Buteo jamaicensis ). Fluoroscopy is a safe, suitable method for investigating GI motility and transit in this species.
[Mh] Termos MeSH primário: Fluoroscopia/veterinária
Trânsito Gastrointestinal/fisiologia
Estrigiformes/fisiologia
[Mh] Termos MeSH secundário: Animais
Bário
Meios de Contraste
Fluoroscopia/métodos
[Pt] Tipo de publicação:CLINICAL TRIAL; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Contrast Media); 24GP945V5T (Barium)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170824
[Lr] Data última revisão:
170824
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170624
[St] Status:MEDLINE
[do] DOI:10.1647/2016-182


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[PMID]:28589568
[Au] Autor:Alammar T; Slowing II; Anderegg J; Mudring AV
[Ad] Endereço:Department of Materials Science and Engineering, Iowa State University, Ames, IA, 50011, USA.
[Ti] Título:Ionic-Liquid-Assisted Microwave Synthesis of Solid Solutions of Sr Ba SnO Perovskite for Photocatalytic Applications.
[So] Source:ChemSusChem;10(17):3387-3401, 2017 Sep 11.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Nanocrystalline Sr Ba SnO (x=0, 0.2, 0.4, 0.8, 1) perovskite photocatalysts were prepared by microwave synthesis in an ionic liquid (IL) and subsequent heat-treatment. The influence of the Sr/Ba substitution on the structure, crystallization, morphology, and photocatalytic efficiency was investigated and the samples were fully characterized. On the basis of X-ray diffraction results, as the Ba content in the SrSnO lattice increases, a symmetry increase was observed from the orthorhombic perovskite structure for SrSnO to the cubic BaSnO structure. The analysis of the sample morphology by SEM reveals that the Sr Ba SnO samples favor the formation of nanorods (500 nm-5 µm in diameter and several micrometers long). The photophysical properties were examined by UV/Vis diffuse reflectance spectroscopy. The band gap decreases from 3.85 to 3.19 eV with increasing Ba content. Furthermore, the photocatalytic properties were evaluated for the hydroxylation of terephthalic acid (TA). The order of the activities for TA hydroxylation was Sr Ba SnO >SrSnO >BaSnO >Sr Ba SnO >Sr Ba SnO . The highest photocatalytic activity was observed for Sr Ba SnO , and this can be attributed to the synergistic impacts of the modification of the crystal structure and morphology, the relatively large surface area associated with the small crystallite size, and the suitable band gap and band-edge position.
[Mh] Termos MeSH primário: Compostos de Cálcio/química
Líquidos Iônicos/química
Micro-Ondas
Óxidos/química
Processos Fotoquímicos
Titânio/química
[Mh] Termos MeSH secundário: Bário/química
Catálise
Técnicas de Química Sintética
Hidroxilação
Ácidos Ftálicos/química
Soluções
Estrôncio/química
Estanho/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Calcium Compounds); 0 (Ionic Liquids); 0 (Oxides); 0 (Phthalic Acids); 0 (Solutions); 12194-71-7 (perovskite); 24GP945V5T (Barium); 6S7NKZ40BQ (terephthalic acid); 7440-31-5 (Tin); D1JT611TNE (Titanium); YZS2RPE8LE (Strontium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171004
[Lr] Data última revisão:
171004
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170608
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201700615


  9 / 6920 MEDLINE  
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[PMID]:28493920
[Au] Autor:Le Blond JS; Baxter PJ; Bello D; Raftis J; Molla YB; Cuadros J; Davey G
[Ad] Endereço:Department of Earth Sciences, Imperial College London, London, United Kingdom.
[Ti] Título:Haemolytic activity of soil from areas of varying podoconiosis endemicity in Ethiopia.
[So] Source:PLoS One;12(5):e0177219, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Podoconiosis, non-filarial elephantiasis, is a non-infectious disease found in tropical regions such as Ethiopia, localized in highland areas with volcanic soils cultivated by barefoot subsistence farmers. It is thought that soil particles can pass through the soles of the feet and taken up by the lymphatic system, leading to the characteristic chronic oedema of the lower legs that becomes disfiguring and disabling over time. METHODS: The close association of the disease with volcanic soils led us to investigate the characteristics of soil samples in an endemic area in Ethiopia to identify the potential causal constituents. We used the in vitro haemolysis assay and compared haemolytic activity (HA) with soil samples collected in a non-endemic region of the same area in Ethiopia. We included soil samples that had been previously characterized, in addition we present other data describing the characteristics of the soil and include pure phase mineral standards as comparisons. RESULTS: The bulk chemical composition of the soils were statistically significantly different between the podoconiosis-endemic and non-endemic areas, with the exception of CaO and Cr. Likewise, the soil mineralogy was statistically significant for iron oxide, feldspars, mica and chlorite. Smectite and kaolinite clays were widely present and elicited a strong HA, as did quartz, in comparison to other mineral phases tested, although no strong difference was found in HA between soils from the two areas. The relationship was further investigated with principle component analysis (PCA), which showed that a combination of an increase in Y, Zr and Al2O3, and a concurrent increase Fe2O3, TiO2, MnO and Ba in the soils increased HA. CONCLUSION: The mineralogy and chemistry of the soils influenced the HA, although the interplay between the components is complex. Further research should consider the variable biopersistance, hygroscopicity and hardness of the minerals and further characterize the nano-scale particles.
[Mh] Termos MeSH primário: Elefantíase/epidemiologia
Elefantíase/patologia
Hemólise
Solo/química
[Mh] Termos MeSH secundário: Bário/análise
Compostos de Cálcio/análise
Cromo/análise
Etiópia
Compostos Férricos/análise
Seres Humanos
Compostos de Manganês/análise
Microscopia Eletrônica de Transmissão
Minerais/análise
Óxidos/análise
Análise de Componente Principal
Titânio/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Calcium Compounds); 0 (Ferric Compounds); 0 (Manganese Compounds); 0 (Minerals); 0 (Oxides); 0 (Soil); 0R0008Q3JB (Chromium); 15FIX9V2JP (titanium dioxide); 24GP945V5T (Barium); 64J2OA7MH3 (manganese oxide); C7X2M0VVNH (lime); D1JT611TNE (Titanium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170512
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0177219


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[PMID]:28488858
[Au] Autor:Liu C; Dermody D; Harris K; Boomgaard T; Sweeney J; Gisch D; Goltz B
[Ad] Endereço:Core R&D Formulation Science, The Dow Chemical Company , Midland, Michigan 48674, United States.
[Ti] Título:Development of a High-Throughput Ion-Exchange Resin Characterization Workflow.
[So] Source:ACS Comb Sci;19(6):422-436, 2017 Jun 12.
[Is] ISSN:2156-8944
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A novel high-throughout (HTR) ion-exchange (IEX) resin workflow has been developed for characterizing ion exchange equilibrium of commercial and experimental IEX resins against a range of different applications where water environment differs from site to site. Because of its much higher throughput, design of experiment (DOE) methodology can be easily applied for studying the effects of multiple factors on resin performance. Two case studies will be presented to illustrate the efficacy of the combined HTR workflow and DOE method. In case study one, a series of anion exchange resins have been screened for selective removal of NO and NO in water environments consisting of multiple other anions, varied pH, and ionic strength. The response surface model (RSM) is developed to statistically correlate the resin performance with the water composition and predict the best resin candidate. In case study two, the same HTR workflow and DOE method have been applied for screening different cation exchange resins in terms of the selective removal of Mg , Ca , and Ba from high total dissolved salt (TDS) water. A master DOE model including all of the cation exchange resins is created to predict divalent cation removal by different IEX resins under specific conditions, from which the best resin candidates can be identified. The successful adoption of HTR workflow and DOE method for studying the ion exchange of IEX resins can significantly reduce the resources and time to address industry and application needs.
[Mh] Termos MeSH primário: Bário/isolamento & purificação
Cálcio/isolamento & purificação
Resinas de Troca Iônica/química
Magnésio/isolamento & purificação
Nitratos/isolamento & purificação
[Mh] Termos MeSH secundário: Ensaios de Triagem em Larga Escala/métodos
Sais/isolamento & purificação
Software
Água/química
Fluxo de Trabalho
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ion Exchange Resins); 0 (Nitrates); 0 (Salts); 059QF0KO0R (Water); 24GP945V5T (Barium); I38ZP9992A (Magnesium); SY7Q814VUP (Calcium)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170511
[St] Status:MEDLINE
[do] DOI:10.1021/acscombsci.7b00043



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