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Pesquisa : D01.490.100.375 [Categoria DeCS]
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  1 / 3603 MEDLINE  
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[PMID]:29216955
[Au] Autor:Li Z; Liu M; Chen LK; Li GZ
[Ad] Endereço:College of Environment and Resource, Jilin University, Changchun 130012, Jilin, China; Environmental Monitoring Center of Jilin Province, Changchun 130011, Jilin, China.
[Ti] Título:Combined Toxicity of an Environmental Remediation Residue, Magnetite Fe3O4 Nanoparticles/Cr(VI) Adduct.
[So] Source:Biomed Environ Sci;30(11):783-791, 2017 Nov.
[Is] ISSN:0895-3988
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: This paper aims to elucidate the combined toxicity of magnetite nanoparticles/Chromium [MNPs/Cr(VI)] adducts. METHODS: The HEK293 cell was exposed to either Cr(VI) or MNPs, or their adducts MNPs/Cr(VI). The cytotoxicity was evaluated by assessing the cell viability, apoptosis, oxidative stress induction, and cellular uptake. RESULTS: The toxicity of formed adducts is significantly reduced when compared to Cr(VI) anions. We found that the cellular uptake of MNPs/Cr(VI) adduct was rare, only few particles were endocytosed from the extracellular fluid and not accumulated in the cell nucleus. On the other hand, the Cr(VI) anions entered cells, generated oxidative stress, induced cell apoptosis, and caused cytotoxicity. CONCLUSION: The results showed minor effects of the nanoadducts on the tested cells and supported that magnetite nanoparticles could be implemented in the wastewater treatment process in which advantageous properties outweigh the risks.
[Mh] Termos MeSH primário: Cromo/química
Recuperação e Remediação Ambiental/métodos
Óxido Ferroso-Férrico/química
Nanopartículas Metálicas/química
[Mh] Termos MeSH secundário: Cromo/toxicidade
Óxido Ferroso-Férrico/toxicidade
Células HEK293
Seres Humanos
Nanopartículas Metálicas/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0R0008Q3JB (Chromium); 18540-29-9 (chromium hexavalent ion); XM0M87F357 (Ferrosoferric Oxide)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171209
[St] Status:MEDLINE
[do] DOI:10.3967/bes2017.106


  2 / 3603 MEDLINE  
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[PMID]:29478651
[Au] Autor:Hu X; Yue Y; Peng X
[Ad] Endereço:National Engineering Laboratory for Industrial Wastewater Treatment, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: xyhu@rcees.ac.cn.
[Ti] Título:Release kinetics of vanadium from vanadium titano-magnetite: The effects of pH, dissolved oxygen, temperature and foreign ions.
[So] Source:J Environ Sci (China);64:298-305, 2018 Feb.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:As part of a broader study of the environmental geochemistry behavior of vanadium (V), the release kinetics of V from the dissolution of natural vanadium titano-magnetite under environmentally relevant conditions was investigated. In both the acidic and basic domains, the V release rate was found to be proportional to fractional powers of hydrogen ion and dissolved oxygen activities. The dependence of the rate on dissolved oxygen can also be described in terms of the Langmuir adsorption model. The empirical rate equation is given by: r [Formula: see text] where, α=0.099-0.265, k'=3.2×10 -1.7×10 , K=2.7×10 -3.9×10 mol/L in acid solution (pH4.1), and α=-0.494-(-0.527), k'=2.0×10 -2.5×10 , and K=4.1×10 -6.5×10 mol/L in basic solution (pH8.8) at 20°C. Based on the effect of temperature on the release rate of V, the activation energies of minerals at pH8.8 were determined to be 148-235kJ/mol, suggesting that the dissolution of vanadium titano-magnetite is a surface-controlled process. The presence of Na , Ca , Mg , K , NO , Cl , SO and CO was found to accelerate the V release rates. This study improves the understanding of both the V pollution risk in some mine areas and the fate of V in the environment.
[Mh] Termos MeSH primário: Óxido Ferroso-Férrico/química
Modelos Químicos
Vanádio/química
[Mh] Termos MeSH secundário: Adsorção
Concentração de Íons de Hidrogênio
Cinética
Oxigênio
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
00J9J9XKDE (Vanadium); S88TT14065 (Oxygen); XM0M87F357 (Ferrosoferric Oxide)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180227
[St] Status:MEDLINE


  3 / 3603 MEDLINE  
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[PMID]:29235591
[Au] Autor:Chen J; Xu X; Huang Z; Luo Y; Tang L; Jiang JH
[Ad] Endereço:State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China. jianhuijiang@hnu.edu.cn tanglijuang@hnu.edu.cn.
[Ti] Título:BEAMing LAMP: single-molecule capture and on-bead isothermal amplification for digital detection of hepatitis C virus in plasma.
[So] Source:Chem Commun (Camb);54(3):291-294, 2018 Jan 02.
[Is] ISSN:1364-548X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A novel dNAD platform (BEAMing LAMP) by combining emulsion micro-reactors, single-molecule magnetic capture and on-bead loop-mediated isothermal amplification has been developed for DNA detection, which enables absolute and high-precision quantification of a target with a detection limit of 300 copies.
[Mh] Termos MeSH primário: DNA/sangue
Hepacivirus/isolamento & purificação
Técnicas de Amplificação de Ácido Nucleico/métodos
[Mh] Termos MeSH secundário: Emulsões
Óxido Ferroso-Férrico/química
Fluorescência
Células HeLa
Seres Humanos
Tamanho da Partícula
Plasma
Poliestirenos/química
RNA/sangue
Carga Viral
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Emulsions); 0 (Polystyrenes); 63231-63-0 (RNA); 9007-49-2 (DNA); XM0M87F357 (Ferrosoferric Oxide)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171214
[St] Status:MEDLINE
[do] DOI:10.1039/c7cc08403j


  4 / 3603 MEDLINE  
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[PMID]:28464983
[Au] Autor:Wang Y; Ren G; Zhang T; Zou S; Mao C; Wang X
[Ad] Endereço:College of Forestry, Northwest A&F University, Yangling 712100, Shannxi, China; Research Center of Recycle Agricultural Engineering and Technology of Shannxi Province, Yangling 712100, Shannxi, China.
[Ti] Título:Effect of magnetite powder on anaerobic co-digestion of pig manure and wheat straw.
[So] Source:Waste Manag;66:46-52, 2017 Aug.
[Is] ISSN:1879-2456
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This study investigated the effects of different amounts of magnetite powder (i.e., 0g, 1.5g, 3g, 4.5g, 6g) on the anaerobic co-digestion of pig manure (PM) and wheat straw (WS). The variations in pH, alkalinity, cellulase activity (CEA), dehydrogenase activity (DHA) and methane production, were analyzed by phases. Correlation of the activities of the two enzymes with methane production was also analyzed, and the Gompertz model was used to evaluate the efficiency of anaerobic digestion (AD) with the addition of magnetite powder. The results showed that magnetite powder had significant effects on the anaerobic co-digestion of PM and WS. The maximum total methane production with the addition of 3g of magnetite powder was 195mL/g total solids (TS), an increase of 72.1%. The CEA and DHA increased with magnetite powder in the ranges of 1.5-4.5g, 1.5-6g, respectively, while the methane production showed a better correlation with DHA than with CEA. Using the Gompertz model, the efficiency of AD was optimal when adding 3g magnetite powder, with higher methane production potential (206mL/g TS), shorter lag-phase time (14.9d) and shorter AD period (44d).
[Mh] Termos MeSH primário: Óxido Ferroso-Férrico
Esterco
Metano
[Mh] Termos MeSH secundário: Anaerobiose
Animais
Eliminação de Resíduos
Suínos
Triticum
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Manure); OP0UW79H66 (Methane); XM0M87F357 (Ferrosoferric Oxide)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171213
[Lr] Data última revisão:
171213
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170504
[St] Status:MEDLINE


  5 / 3603 MEDLINE  
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[PMID]:29078797
[Au] Autor:Wang Y; Zhang XY; Luo YL; Xu F; Chen YS; Su YY
[Ad] Endereço:Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, People's Republic of China.
[Ti] Título:Dual stimuli-responsive Fe O graft poly(acrylic acid)-block-poly(2-methacryloyloxyethyl ferrocenecarboxylate) copolymer micromicelles: surface RAFT synthesis, self-assembly and drug release applications.
[So] Source:J Nanobiotechnology;15(1):76, 2017 Oct 27.
[Is] ISSN:1477-3155
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Stimuli-responsive polymer materials are a new kind of intelligent materials based on the concept of bionics, which exhibits more significant changes in physicochemical properties upon triggered by tiny environment stimuli, hence providing a good carrier platform for antitumor drug delivery. RESULTS: Dual stimuli-responsive Fe O graft poly(acrylic acid)-block-poly(2-methacryloyloxyethyl ferrocenecarboxylate) block copolymers (Fe O -g-PAA-b-PMAEFC) were engineered and synthesized through a two-step sequential reversible addition-fragmentation chain transfer polymerization route. The characterization was performed by FTIR, H NMR, SEC, XRD and TGA techniques. The self-assembly behavior in aqueous solution upon triggered by pH, magnetic and redox stimuli was investigated via zeta potentials, vibration sample magnetometer, cyclic voltammetry, fluorescent spectrometry, dynamic light scattering, XPS, TEM and SEM measurements. The experimental results indicated that the Fe O -g-PAA-b-PMAEFC copolymer materials could spontaneously assemble into hybrid magnetic copolymer micromicelles with core-shell structure, and exhibited superparamagnetism, redox and pH stimuli-responsive features. The hybrid copolymer micromicelles were stable and nontoxic, and could entrap hydrophobic anticancer drug, which was in turn swiftly and effectively delivered from the drug-loaded micromicelles at special microenvironments such as acidic pH and high reactive oxygen species. CONCLUSION: This class of stimuli-responsive copolymer materials is expected to find wide applications in medical science and biology, etc., especially in drug delivery system.
[Mh] Termos MeSH primário: Resinas Acrílicas/química
Preparações de Ação Retardada/química
Óxido Ferroso-Férrico/química
Compostos Ferrosos/química
Polímeros/química
[Mh] Termos MeSH secundário: Resinas Acrílicas/síntese química
Antineoplásicos Fitogênicos/administração & dosagem
Antineoplásicos Fitogênicos/farmacologia
Linhagem Celular Tumoral
Preparações de Ação Retardada/síntese química
Sistemas de Liberação de Medicamentos
Liberação Controlada de Fármacos
Óxido Ferroso-Férrico/síntese química
Compostos Ferrosos/síntese química
Seres Humanos
Concentração de Íons de Hidrogênio
Campos Magnéticos
Micelas
Neoplasias/tratamento farmacológico
Oxirredução
Paclitaxel/administração & dosagem
Paclitaxel/farmacologia
Polímeros/síntese química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Acrylic Resins); 0 (Antineoplastic Agents, Phytogenic); 0 (Delayed-Action Preparations); 0 (Ferrous Compounds); 0 (Micelles); 0 (Polymers); 1271-42-7 (ferrocenecarboxylic acid); 4Q93RCW27E (carbopol 940); P88XT4IS4D (Paclitaxel); XM0M87F357 (Ferrosoferric Oxide)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171113
[Lr] Data última revisão:
171113
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171029
[St] Status:MEDLINE
[do] DOI:10.1186/s12951-017-0309-y


  6 / 3603 MEDLINE  
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[PMID]:28987498
[Au] Autor:Bahrani S; Ghaedi M; Dashtian K; Ostovan A; Mansoorkhani MJK; Salehi A
[Ad] Endereço:Departmentof chemistry, Yasouj University, Yasouj, 75918-74831, Iran.
[Ti] Título:MOF-5(Zn)-Fe O nanocomposite based magnetic solid-phase microextraction followed by HPLC-UV for efficient enrichment of colchicine in root of colchicium extracts and plasma samples.
[So] Source:J Chromatogr B Analyt Technol Biomed Life Sci;1067:45-52, 2017 Nov 01.
[Is] ISSN:1873-376X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:In present work, facile method is developed for determination of colchicine in human plasma sample, autumn and spring root of colchicium extracts by ultrasound assisted dispersive magnetic solid phase microextraction followed by HPLC-UV method (UAD-MSPME-HPLC-UV). Magnetic (Fe O -nanoparticles) metal organic framework-5, (MOF-5(Zn)-Fe O NPs) was synthesized by dispersing MOF-5 and Fe(NO ) .9H O in ethylene glycol (as capping agent) and NaOH (pH adjustment agent) by hydrothermal method. The prepared sorbent was characterized via XRD and SEM analysis and applied as magnetic solid phase in UAD-MSPME-HPLC-UV method. In this method, colchicine molecules were sorbed on MOF-5(Zn)-Fe O NPs sorbent by various mechanisms like ion exchange, hydrogen bonding and electrostatic, á´¨-á´¨, hard-hard and dipole-ion interaction followed by exposing sonication waves as incremental mass transfer agent and then the sorbent was separated from the sample matrix by an external magnetic fields. Subsequently, accumulated colchicine were eluted by small volume of desorption organic solvent. Influence of operational variables such as MOF-5(Zn)-Fe O NPs mass, volume of extracting solvent and sonication time on response property (recovery) were studied and optimized by central composite design (CCD) combined with desirability function (DF) approach. Under optimum condition, the method has wide linear calibration rang (0.5-1700ngmL ) with reasonable detection limit (0.13ngmL ) and R =0.9971. Finally, the UAD-MSPME-HPLC-UV method was successfully applied for determination of colchicine autumn and spring root of colchicium extracts and plasma samples.
[Mh] Termos MeSH primário: Cromatografia Líquida de Alta Pressão/métodos
Colchicina
Colchicum/química
Nanocompostos/química
Extratos Vegetais/química
Microextração em Fase Sólida/métodos
[Mh] Termos MeSH secundário: Colchicina/análise
Colchicina/química
Colchicina/isolamento & purificação
Óxido Ferroso-Férrico/química
Concentração de Íons de Hidrogênio
Limite de Detecção
Modelos Lineares
Raízes de Plantas/química
Reprodutibilidade dos Testes
Compostos de Zinco/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Extracts); 0 (Zinc Compounds); SML2Y3J35T (Colchicine); XM0M87F357 (Ferrosoferric Oxide)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171024
[Lr] Data última revisão:
171024
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171009
[St] Status:MEDLINE


  7 / 3603 MEDLINE  
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[PMID]:28857472
[Au] Autor:Hu X; Wang Y; Zhang L; Xu M; Zhang J; Dong W
[Ad] Endereço:Institute of Chemical Industry of Forestry Products, CAF, Nanjing, 210042, China.
[Ti] Título:Dual-pH/Magnetic-Field-Controlled Drug Delivery Systems Based on Fe O @SiO -Incorporated Salecan Graft Copolymer Composite Hydrogels.
[So] Source:ChemMedChem;12(19):1600-1609, 2017 Oct 09.
[Is] ISSN:1860-7187
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Salecan is a water-soluble extracellular ß-glucan and has excellent physicochemical and biological properties for hydrogel preparation. In this study, a new pH/magnetic field dual-responsive hydrogel was prepared by the graft copolymerization of salecan with 4-pentenoic acid (PA) and N-hydroxyethylacrylamide (HEAA) in the presence of Fe O @SiO nanoparticles for doxorubicin hydrochloride (DOX) release. Integration of Fe O @SiO nanoparticles in salecan-g-poly(PA-co-HEAA) copolymers afforded magnetic sensitivity to the original material. DOX-loaded hydrogels exhibited a clear capacity for pH/magnetic field dual-responsive controlled drug release. Lowering the pH to acidic conditions or introducing an external magnetic field caused an enhancement in DOX release. This salecan-g-poly(PA-co-HEAA)/Fe O @SiO composite hydrogel is a promising drug carrier for magnetically targeted drug delivery with enhanced DOX cytotoxicity against A549 cells.
[Mh] Termos MeSH primário: Doxorrubicina/química
Portadores de Fármacos/química
Óxido Ferroso-Férrico/química
Hidrogéis/química
Polímeros/química
Dióxido de Silício/química
beta-Glucanas/química
[Mh] Termos MeSH secundário: Células A549
Animais
Células COS
Sobrevivência Celular/efeitos dos fármacos
Cercopithecus aethiops
Doxorrubicina/metabolismo
Doxorrubicina/toxicidade
Liberação Controlada de Fármacos
Ácidos Graxos Monoinsaturados/química
Seres Humanos
Concentração de Íons de Hidrogênio
Magnetismo
Nanopartículas/química
Espectroscopia de Infravermelho com Transformada de Fourier
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Drug Carriers); 0 (Fatty Acids, Monounsaturated); 0 (Hydrogels); 0 (Polymers); 0 (beta-Glucans); 0 (salecan); 7631-86-9 (Silicon Dioxide); 80168379AG (Doxorubicin); D4S77Y29FB (4-pentenoic acid); XM0M87F357 (Ferrosoferric Oxide)
[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:170901
[St] Status:MEDLINE
[do] DOI:10.1002/cmdc.201700428


  8 / 3603 MEDLINE  
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[PMID]:28778038
[Au] Autor:Zang Y; Guo N; Jiao J; Wang X; Gai Q; Xu W; Fu Y
[Ad] Endereço:Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, PR China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, PR China.
[Ti] Título:Application of magnetically immobilized edible fungus for the biotransformation of panax notoginseng saponin Rb1 to Rd and Rg3.
[So] Source:J Chromatogr B Analyt Technol Biomed Life Sci;1061-1062:306-313, 2017 Sep 01.
[Is] ISSN:1873-376X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:In this study, we developed a new magnetically immobilized edible fungus for the biotransformation of panax notoginseng saponins Rb1 to Rd and Rg3. The optimum biotransformation conditions were as follows: temperature 32°C, pH 6.5, time 48h and liquid-solid ratio 25:1(mL/g). The yields of Rd and Rg3 reached 41.35±0.12mg/g and 6.35±0.08mg/g which increased 6.97-fold and 3.23-fold to that of untreated control, respectively. Additionally, SEM demonstrated that vestured pits and cell walls of samples were destroyed obviously which was beneficial to the Rb1 biotransformation and target Rd and Rg3 release. Meanwhile, the reusability of magnetically immobilized microorganism was tested and the activity of the magnetically immobilized microorganism remained 83.8% after 15 runs. The recycling experiments demonstrated that magnetically immobilized fungus exhibited higher efficiency than the non-magnetical one. These results proved that this new magnetically immobilized microorganism could be applied for industrial production and pharmaceutical industry with good efficiency.
[Mh] Termos MeSH primário: Células Imobilizadas/metabolismo
Medicamentos de Ervas Chinesas/química
Óxido Ferroso-Férrico/química
Fungos
Ginsenosídeos
Panax notoginseng
[Mh] Termos MeSH secundário: Biotecnologia/métodos
Medicamentos de Ervas Chinesas/metabolismo
Fungos/citologia
Fungos/enzimologia
Fungos/metabolismo
Ginsenosídeos/análise
Ginsenosídeos/química
Ginsenosídeos/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Drugs, Chinese Herbal); 0 (Ginsenosides); XM0M87F357 (Ferrosoferric Oxide)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170906
[Lr] Data última revisão:
170906
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170805
[St] Status:MEDLINE


  9 / 3603 MEDLINE  
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[PMID]:28723288
[Au] Autor:Bulte JWM
[Ad] Endereço:Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research; Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering The Johns Hopkins University School of Medicine 217 Traylor Bldg, 720 Rutland Ave Baltimore, MD 21205.
[Ti] Título:Science to Practice: Can MR Imaging Cell Tracking of Macrophage Infiltration Be Used as a Predictive Imaging Biomarker for Transplanted Stem Cell Rejection?
[So] Source:Radiology;284(2):307-309, 2017 Aug.
[Is] ISSN:1527-1315
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Ferumoxytol-enhanced magnetic resonance (MR) imaging of donor-matched and mismatched stem cell transplants demonstrated decreased signal intensity not only for a xenogeneic mismatch in species but, surprisingly, also for a syngeneic mismatch in sex. MR imaging findings were corroborated with intravital fluorescence microscopy (IVM), where nearly 90% of all ferumoxytol-containing cells were found to be macrophages. Hence, MR imaging cell tracking of infiltrating macrophages may have predictive value in determining whether transplanted stem cell rejection will occur.
[Mh] Termos MeSH primário: Rastreamento de Células/métodos
Rejeição de Enxerto/diagnóstico por imagem
Rejeição de Enxerto/imunologia
Macrófagos/imunologia
Imagem por Ressonância Magnética/métodos
Transplante de Células-Tronco
[Mh] Termos MeSH secundário: Animais
Biomarcadores
Feminino
Óxido Ferroso-Férrico
Imunossupressores/administração & dosagem
Masculino
Camundongos
Camundongos Transgênicos
Valor Preditivo dos Testes
Ratos
Rodaminas
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biomarkers); 0 (Immunosuppressive Agents); 0 (Rhodamines); XM0M87F357 (Ferrosoferric Oxide)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170731
[Lr] Data última revisão:
170731
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170721
[St] Status:MEDLINE
[do] DOI:10.1148/radiol.2017170536


  10 / 3603 MEDLINE  
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[PMID]:28722538
[Au] Autor:Bentahir Y; Elmarhoum S; Salghi R; Algarra M; Ríos A; Zougagh M
[Ad] Endereço:a Department of Analytical Chemistry and Food Technology , University of Castilla La Mancha Ciudad Real , Ciudad Real , Spain.
[Ti] Título:Dispersed synthesis of uniform Fe3O4 magnetic nanoparticles via in situ decomposition of iron precursor along cotton fibre for Sudan dyes analysis in food samples.
[So] Source:Food Addit Contam Part A Chem Anal Control Expo Risk Assess;34(11):1853-1862, 2017 Nov.
[Is] ISSN:1944-0057
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Fe O magnetic nanoparticles, with a negative charge surface, are known to have efficient adsorbent properties, but they tend to be agglomerated into larger aggregates or flocs, which can cause loss of specific area. The addition of cotton fibre, as a stabiliser in preparation of the Fe O nanoparticles, is able to efficiently reduce particle aggregation, and thus, effective particle size, resulting in much greater specific surface area and adsorption sites. Fe O nanoparticles synthesis was accomplished by in situ high-temperature decomposition of the precursor ferric ion in the presence of cotton fibre and ethylene glycol solvent. The morphology of Fe O nanoparticles was characterised by field emission scanning electron microscopy and X-ray diffraction, which confirmed that the magnetic nanoparticles are highly dispersed. These Fe O nanoparticles were used for clean-up and pre-concentration of Sudan dyes in chilli and hot red sauces, prior to their determination by capillary liquid chromatography diode array detection. A comparative study of analyte pre-concentration was conducted with magnetic nanoparticles prepared with and without cotton fibre showing that both solid phases adsorb the analytes, but higher recoveries were obtained when using cotton fibre which therefore was selected for extraction of Sudan dyes.
[Mh] Termos MeSH primário: Fibra de Algodão
Óxido Ferroso-Férrico/síntese química
Corantes de Alimentos/análise
Ferro/química
Nanopartículas de Magnetita/química
[Mh] Termos MeSH secundário: Compostos Azo/análise
Óxido Ferroso-Férrico/química
Naftóis/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Azo Compounds); 0 (Food Coloring Agents); 0 (Magnetite Nanoparticles); 0 (Naphthols); 48I7IBB68J (1-phenylazo-2-naphthol); 8C1M5O3ECT (sudan red); E1UOL152H7 (Iron); ND733RX3JN (sudan III); XM0M87F357 (Ferrosoferric Oxide)
[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:170720
[St] Status:MEDLINE
[do] DOI:10.1080/19440049.2017.1357840



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