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Pesquisa : D01.248.497.158.490 [Categoria DeCS]
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  1 / 6159 MEDLINE  
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[PMID]:28748237
[Au] Autor:Suzuki J; Miyano N; Yashiro S; Umezawa T; Matsuda F
[Ad] Endereço:Graduate School of Environmental Science, Hokkaido University, N10 W5, Sapporo 060-0810, Japan. umezawa@ees.hokudai.ac.jp fmatsuda@ees.hokudai.ac.jp.
[Ti] Título:Total synthesis of (-)-kainic acid and (+)-allo-kainic acid through SmI -mediated intramolecular coupling between allyl chloride and an α,ß-unsaturated ester.
[So] Source:Org Biomol Chem;15(31):6557-6566, 2017 Aug 09.
[Is] ISSN:1477-0539
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A 3,4-disubstituted pyrrolidine ring was effectively cyclized through SmI -mediated reductive coupling between allyl chloride and an α,ß-unsaturated ester, although little has been reported about SmI -promoted C-C bond formation of an allyl chloride with an α,ß-unsaturated ester. Selection of either the 3,4-cis- or 3,4-trans-selective cyclization can be accomplished simply by changing the additives from NiI to HMPA during reductive cyclization conducted in H O-THF. Total synthesis of (-)-kainic acid and (+)-allo-kainic acid, which are pyrrolidine alkaloids used in neuroscience and neuropharmacology as useful molecular probes, was successfully achieved by using the stereo-complementary ring closure reactions promoted by SmI for the construction of the 2,3,4-trisubsituted pyrrolidine scaffold of kainoids.
[Mh] Termos MeSH primário: Compostos Alílicos/química
Iodetos/química
Ácido Caínico/análogos & derivados
Ácido Caínico/síntese química
Samário/química
[Mh] Termos MeSH secundário: Compostos Alílicos/síntese química
Ciclização
Ésteres/síntese química
Ésteres/química
Iodetos/síntese química
Oxirredução
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Allyl Compounds); 0 (Esters); 0 (Iodides); 0 (samarium diiodide); 42OD65L39F (Samarium); SIV03811UC (Kainic Acid); V2RFT0R50S (allyl chloride)
[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:170728
[St] Status:MEDLINE
[do] DOI:10.1039/c7ob01427a


  2 / 6159 MEDLINE  
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[PMID]:29241733
[Au] Autor:Zhang B; Cui Y; Wang L; Zhao L; Hou C; Zeng Q; Zhang Z; Yu J; Zhao Y; Nie J; Chen X; Wang A; Liu H
[Ad] Endereço:School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin 300070, People's Republic of China.
[Ti] Título:Autophagy regulates high concentrations of iodide-induced apoptosis in SH-SY5Y cells.
[So] Source:Toxicol Lett;284:129-135, 2018 Mar 01.
[Is] ISSN:1879-3169
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:To date, there are many people residing in areas with high levels of iodide in water. Our previous epidemiological study showed that exposure to high iodine in drinking water significantly reduced the intelligence of children although the mechanisms remain unclear. To explore whether high concentrations of iodide may cause cytotoxic effect and the role of autophagy in the high iodide-induced apoptosis, human neuroblastoma cells (SH-SY5Y cells) were exposed to high concentrations of iodide. Morphological phenotypes, cell viability, Hoechst 33258 staining, the expression levels of apoptosis and autophagy-related proteins were detected. A possible effect of an inhibitor (3-methyladenine, 3-MA) or an inducer (rapamycin) of autophagy on high iodide-induced apoptosis also was examined. Results indicated that high iodide changed cellular morphology, decreased cell viability and increased the protein's expression level of apoptosis and autophagy. In addition, high iodide-induced apoptosis was enhanced by inhibition of autophagy and inhibited by activation of autophagy in SH-SY5Y cells. Collectively, high concentrations of iodide are toxic to SH-SY5Y cells, as well as induce apoptosis and autophagy. Furthermore, autophagy plays a regulatory role in high concentrations of iodide-induced apoptosis in SH-SY5Y cells.
[Mh] Termos MeSH primário: Apoptose/efeitos dos fármacos
Autofagia/efeitos dos fármacos
Iodetos/toxicidade
[Mh] Termos MeSH secundário: Contagem de Células
Linhagem Celular Tumoral
Sobrevivência Celular/efeitos dos fármacos
Relação Dose-Resposta a Droga
Seres Humanos
Microscopia de Fluorescência
Sirolimo/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Iodides); W36ZG6FT64 (Sirolimus)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180221
[Lr] Data última revisão:
180221
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171216
[St] Status:MEDLINE


  3 / 6159 MEDLINE  
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[PMID]:29250546
[Au] Autor:Ross GR; Fabersani E; Russo M; Gómez A; Japaze H; González SN; Gauffin Cano P
[Ad] Endereço:Instituto de Biotecnología Farmacéutica y Alimentaria (INBIOFAL-CONICET), Tucumán, Argentina.
[Ti] Título:Effect of Excess Iodide Intake on Salivary Glands in a Swiss Albino Mice Model.
[So] Source:Biomed Res Int;2017:6302869, 2017.
[Is] ISSN:2314-6141
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Iodine is an important micronutrient required for nutrition. Excess iodine has adverse effects on thyroid, but there is not enough information regarding its effect on salivary glands. In addition to food and iodized salt, skin disinfectants and maternal nutritional supplements contain iodide, so its intake could be excessive during pregnancy, lactation, and infancy. The aim of this work was to evaluate the effect of excess iodide ingestion on salivary glands during mating, gestation, lactation, and postweaning period in mouse. During assay, mice were allocated into groups: control and treatment groups (received distilled water with NaI 1 mg/mL). Water intake, glandular weight, and histology were analyzed. Treatment groups showed an increase in glandular weight and a significantly ( < 0.05) higher water intake than control groups. Lymphocyte infiltration was observed in animals of treatment groups, while there was no infiltration in glandular sections of control groups. Results demonstrated that a negative relationship could exist between iodide excess and salivary glands. This work is novel evidence that high levels of iodide intake could induce mononuclear infiltration in salivary glands. These results should be considered, especially in pregnant/lactating women, to whom a higher iodine intake is usually recommended.
[Mh] Termos MeSH primário: Iodetos/farmacologia
Glândulas Salivares/efeitos dos fármacos
[Mh] Termos MeSH secundário: Animais
Ingestão de Líquidos/efeitos dos fármacos
Feminino
Iodetos/administração & dosagem
Masculino
Camundongos
Tamanho do Órgão
Gravidez
Glândulas Salivares/patologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Iodides)
[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:171219
[St] Status:MEDLINE
[do] DOI:10.1155/2017/6302869


  4 / 6159 MEDLINE  
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[PMID]:29224767
[Au] Autor:Grønseth T; Vestby LK; Nesse LL; Thoen E; Habimana O; von Unge M; Silvola JT
[Ad] Endereço:University of Oslo, Oslo, Norway; Department of Otolaryngology, Head and Neck Surgery, Oslo University Hospital, Norway. Electronic address: t.gronseth@gmail.com.
[Ti] Título:Lugol's solution eradicates Staphylococcus aureus biofilm in vitro.
[So] Source:Int J Pediatr Otorhinolaryngol;103:58-64, 2017 Dec.
[Is] ISSN:1872-8464
[Cp] País de publicação:Ireland
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: The aim of the study was to evaluate the antibacterial efficacy of Lugol's solution, acetic acid, and boric acid against Staphylococcus aureus biofilm. METHODS: The efficacy of Lugol's solution 1%, 0.1%, and 0.05%, acetic acid 5% or boric acid 4.7% for treatment of Staphylococcus aureus biofilm in vitro was tested using 30 clinical strains. Susceptibility in the planktonic state was assessed by disk diffusion test. Antiseptic effect on bacteria in biofilm was evaluated by using a Biofilm-oriented antiseptic test (BOAT) based on metabolic activity, a biofilm bactericidal test based on culturing of surviving bacteria and confocal laser scanning microscopy combined with LIVE/DEAD staining. RESULTS: In the planktonic state, all tested S. aureus strains were susceptible to Lugol's solution and acetic acid, while 27 out of 30 tested strains were susceptible to boric acid. In biofilm the metabolic activity was significantly reduced following exposure to Lugol's solution and 5% acetic acid, while boric acid exposure led to no significant changes in metabolic activities. In biofilm, biocidal activity was observed for Lugol's solution 1% (30/30), 0.1% (30/30), and 0.05% (26/30). Acetic acid and boric acid showed no bactericidal activity in this test. Confocal laser scanning microscopy, assessed in 4/30 strains, revealed significantly fewer viable biofilm bacteria with Lugol's solution (1% p < 0.001, 0.1% p = 0.001 or 0.05% p = 0.001), acetic acid 5% for 10 min (p = 0.001) or 30 min (p = 0.015), but not for acetic acid for 1 min or boric acid. CONCLUSION: Lugol's solution 1.0% and 0.1% effectively eradicated S. aureus in biofilm and could be an alternative to conventional topical antibiotics where S. aureus biofilm is suspected such as external otitis, pharyngitis and wounds.
[Mh] Termos MeSH primário: Ácido Acético/farmacologia
Anti-Infecciosos Locais/farmacologia
Biofilmes/efeitos dos fármacos
Ácidos Bóricos/farmacologia
Iodetos/farmacologia
Staphylococcus aureus/efeitos dos fármacos
[Mh] Termos MeSH secundário: Microscopia Confocal
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Infective Agents, Local); 0 (Boric Acids); 0 (Iodides); Q40Q9N063P (Acetic Acid); R57ZHV85D4 (boric acid); T66M6Y3KSA (Lugol's solution)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171226
[Lr] Data última revisão:
171226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171212
[St] Status:MEDLINE


  5 / 6159 MEDLINE  
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[PMID]:28868786
[Au] Autor:Shukla S; Shukla S; Haur LJ; Dintakurti SSH; Han G; Priyadarshi A; Baikie T; Mhaisalkar SG; Mathews N
[Ad] Endereço:Energy Research Institute @ NTU (ERIAN), Nanyang Technological University, Singapore, Research Techno Plaza, 50 Nanyang Drive, 637553, Singapore.
[Ti] Título:Effect of Formamidinium/Cesium Substitution and PbI on the Long-Term Stability of Triple-Cation Perovskites.
[So] Source:ChemSusChem;10(19):3804-3809, 2017 Oct 09.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Altering cation and anion ratios in perovskites has proven an excellent means of tuning the perovskite properties and enhancing the performance. Recently, methylammonium/formamidinium/cesium triple-cation mixed-halide perovskites have demonstrated efficiencies up to 22 %. Similar to the widely explored methylammonium lead halide, excess PbI is added to these perovskite films to enhance their performances. The excess PbI is known to be beneficial for the performance. However, its impact on stability is less well known. Triple-cation perovskites deploy excess PbI up to 8 %. Thus, it is imperative to analyze the role of excess PbI in the degradation kinetics. In this study, the amount of PbI in the triple-cation perovskite films is varied and the degradation kinetics monitored by X-ray diffraction and optical absorption spectroscopy. The inclusion of excess PbI is shown to adversely affect the stability of the material. Faster degradation kinetics are observed for samples with higher PbI contents. However, samples with excess PbI also showed superior properties such as enhanced grain sizes and better optical absorption. Thus, careful management of the PbI quantity is required to obtain better stability and alternative pathways should be explored to achieve better device performance rather than adding excess PbI .
[Mh] Termos MeSH primário: Amidinas/química
Compostos de Cálcio/química
Césio/química
Fontes de Energia Elétrica
Iodetos/química
Chumbo/química
Óxidos/química
Energia Solar
Titânio/química
[Mh] Termos MeSH secundário: Flúor/química
Compostos de Estanho/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amidines); 0 (Calcium Compounds); 0 (Iodides); 0 (Oxides); 0 (Tin Compounds); 12194-71-7 (perovskite); 1KSV9V4Y4I (Cesium); 284SYP0193 (Fluorine); 2P299V784P (Lead); 463-52-5 (formamidine); D1JT611TNE (Titanium); KM7N50LOS6 (stannic 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:170905
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201701203


  6 / 6159 MEDLINE  
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[PMID]:28800586
[Au] Autor:Gonzales J; Tymon T; Küpper FC; Edwards MS; Carrano CJ
[Ad] Endereço:Department of Chemistry and Biochemistry, San Diego State University, San Diego, California, United States of America.
[Ti] Título:The potential role of kelp forests on iodine speciation in coastal seawater.
[So] Source:PLoS One;12(8):e0180755, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Kelps have a major role in marine and atmospheric iodine cycling in the coastal zone of temperate regions, with potential wide-ranging impacts on ozone destruction in the coastal marine boundary layer. However, little is known about the impact of kelp forests on iodine speciation in coastal sea water. To address this, we examined iodide and iodate concentrations in seawater in and around a giant kelp forest near San Diego, CA, USA, and a nearby site that was not influenced by kelp biology. Our data shows that while both iodide and iodate concentrations remained unchanged during the year at the nearby site, these concentrations changed significantly in and around the kelp forest, and were strongly related to changes in kelp canopy biomass. In particular, iodide reached its highest concentration and iodate reached its lowest concentration during the summer when the kelp canopies were near their maximum, while the opposite pattern was observed during the winter and spring when the kelp canopies were near their minimum. Further, comparisons of these changes with corresponding changes in seawater temperature and wind speed indicated that these relationships were relatively small compared to those with changes in kelp biomass. Together, our data show a strong relationship between kelp biomass and iodine metabolism.
[Mh] Termos MeSH primário: Iodo/análise
Kelp/química
Água do Mar/química
[Mh] Termos MeSH secundário: Análise de Variância
Biomassa
California
Iodatos/análise
Iodetos/análise
Estações do Ano
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Iodates); 0 (Iodides); 9679TC07X4 (Iodine)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171009
[Lr] Data última revisão:
171009
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170812
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0180755


  7 / 6159 MEDLINE  
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[PMID]:28774660
[Au] Autor:Sun Z; Su Q; Rokita SE
[Ad] Endereço:Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA.
[Ti] Título:The distribution and mechanism of iodotyrosine deiodinase defied expectations.
[So] Source:Arch Biochem Biophys;632:77-87, 2017 Oct 15.
[Is] ISSN:1096-0384
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Iodotyrosine deiodinase (IYD) is unusual for its reliance on flavin to promote reductive dehalogenation under aerobic conditions. As implied by the name, this enzyme was first discovered to catalyze iodide elimination from iodotyrosine for recycling iodide during synthesis of tetra- and triiodothyronine collectively known as thyroid hormone. However, IYD likely supports many more functions and has been shown to debrominate and dechlorinate bromo- and chlorotyrosines. A specificity for halotyrosines versus halophenols is well preserved from humans to bacteria. In all examples to date, the substrate zwitterion establishes polar contacts with both the protein and the isoalloxazine ring of flavin. Mechanistic data suggest dehalogenation is catalyzed by sequential one electron transfer steps from reduced flavin to substrate despite the initial expectations for a single two electron transfer mechanism. A purported flavin semiquinone intermediate is stabilized by hydrogen bonding between its N5 position and the side chain of a Thr. Mutation of this residue to Ala suppresses dehalogenation and enhances a nitroreductase activity that is reminiscent of other enzymes within the same structural superfamily.
[Mh] Termos MeSH primário: Flavina-Adenina Dinucleotídeo/análogos & derivados
Iodeto Peroxidase/química
Nitrorredutases/química
[Mh] Termos MeSH secundário: Animais
Flavina-Adenina Dinucleotídeo/química
Flavina-Adenina Dinucleotídeo/genética
Flavina-Adenina Dinucleotídeo/metabolismo
Seres Humanos
Iodeto Peroxidase/genética
Iodeto Peroxidase/metabolismo
Iodetos/química
Iodetos/metabolismo
Nitrorredutases/genética
Nitrorredutases/metabolismo
Tri-Iodotironina/química
Tri-Iodotironina/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Iodides); 06LU7C9H1V (Triiodothyronine); 146-14-5 (Flavin-Adenine Dinucleotide); 35919-91-6 (flavin semiquinone); EC 1.11.1.8 (Iodide Peroxidase); EC 1.7.- (Nitroreductases)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170805
[St] Status:MEDLINE


  8 / 6159 MEDLINE  
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[PMID]:28774630
[Au] Autor:Yang F; Wei D; Xiao M; Sun X; Guo Q; Liu Y; Du Y
[Ad] Endereço:State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: yangfan715@mails.ucas.ac.cn.
[Ti] Título:The chlorination transformation characteristics of benzophenone-4 in the presence of iodide ions.
[So] Source:J Environ Sci (China);58:93-101, 2017 Aug.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Benzophenone-type UV filters are a group of compounds widely used to protect human skin from damage of UV irradiation. Benzophenone-4 (BP-4) was targeted to explore its transformation behaviors during chlorination disinfection treatment in the presence of iodide ions. With the help of ultra performance liquid phase chromatograph and high-resolution quadrupole time-of-flight mass spectrometer, totally fifteen halogenated products were identified, and five out of them were iodinated products. The transformation mechanisms of BP-4 involved electrophilic substitution generating mono- or di-halogenated products, which would be oxidized into esters and further hydrolyzed into phenolic derivatives. The desulfonation and decarboxylation were observed in chlorination system either. Obeying the transformation pathways, five iodinated products formed. The pH conditions of chlorination system determined the reaction types of transformation and corresponding species of products. The more important was that, the acute toxicity had significant increase after chlorination treatment on BP-4, especially in the presence of iodide ions. When the chlorination treatment was performed on ambient water spiked with BP-4 and iodide ions, iodinated by-products could be detected.
[Mh] Termos MeSH primário: Benzofenonas/química
Iodetos/química
Modelos Químicos
Protetores Solares/química
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Benzofenonas/análise
Desinfecção
Halogenação
Protetores Solares/análise
Raios Ultravioleta
Poluentes Químicos da Água/análise
Purificação da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Benzophenones); 0 (Iodides); 0 (Sunscreening Agents); 0 (Water Pollutants, Chemical); 1W6L629B4K (sulisobenzone)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170811
[Lr] Data última revisão:
170811
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170805
[St] Status:MEDLINE


  9 / 6159 MEDLINE  
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[PMID]:28774620
[Au] Autor:Dong S; Nguyen TH; Plewa MJ
[Ad] Endereço:Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Safe Global Water Institute, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Electronic address: sdong6@illinois.edu.
[Ti] Título:Comparative mammalian cell cytotoxicity of wastewater with elevated bromide and iodide after chlorination, chloramination, or ozonation.
[So] Source:J Environ Sci (China);58:296-301, 2017 Aug.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Recycling wastewater is becoming more common as communities around the world try to better control their water resources against an increased frequency of either prolonged droughts or intense flooding. For communities in coastal areas, wastewaters may contain elevated levels of bromide (Br ) and iodide (I ) from seawater intrusion or high mineral content of source waters. Disinfection of such wastewater is mandatory to prevent the spread of pathogens, however little is known about the toxicity of wastewater after disinfection in the presence of Br and I . In this study we compared the induction of chronic cytotoxicity in mammalian cells in samples of municipal secondary wastewater effluent amended with elevated levels of Br /I after disinfection by chlorine, chloramines or ozone to identify which disinfection process generated wastewater with the lowest level of adverse biological response. Chlorination increased mammalian cell cytotoxicity by 5 times as compared to non-disinfected controls. Chloramination produced disinfected wastewater that expressed 6.3 times more cytotoxicity than the non-disinfected controls and was 1.3 times more cytotoxic than the chlorinated samples. Ozonation produced wastewater with cytotoxicity comparable to the non-disinfected controls and was at least 4 times less cytotoxic than the chlorine disinfected wastewaters. These results indicate that compared to chlorination and chloramination, ozonation of wastewater with high Br /I levels yielded the lowest mammalian cell cytotoxicity, suggesting its potential as a more favorable method to disinfect wastewater with minimizing the biological toxicity in mind.
[Mh] Termos MeSH primário: Águas Residuais/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Brometos/toxicidade
Cloraminas/toxicidade
Desinfetantes/toxicidade
Desinfecção/métodos
Halogenação
Iodetos/toxicidade
Ozônio/toxicidade
Purificação da Água/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bromides); 0 (Chloramines); 0 (Disinfectants); 0 (Iodides); 0 (Waste Water); 0 (Water Pollutants, Chemical); 66H7ZZK23N (Ozone)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170811
[Lr] Data última revisão:
170811
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170805
[St] Status:MEDLINE


  10 / 6159 MEDLINE  
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[PMID]:28762644
[Au] Autor:Marinova N; Franckevicius M; Matulaitiene I; Devizis A; Niaura G; Gulbinas V; Delgado JL
[Ad] Endereço:POLYMAT, University of the Basque Country UPV/EHU, Avenida de Tolosa 72, Donostia-San Sebastián, Spain.
[Ti] Título:Hindered Amine Light Stabilizers Increase the Stability of Methylammonium Lead Iodide Perovskite Against Light and Oxygen.
[So] Source:ChemSusChem;10(19):3760-3764, 2017 Oct 09.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Methylammonium lead iodide perovskite (MAPI) is a promising material for highly efficient photovoltaic devices. However, it suffers from photooxidation, which imposes strict requirements for its protection from oxygen during processing and operation. A hindered amine light stabilizer (HALS) has been found to exert a stabilization effect on methylammonium iodide (MAI) and MAPI against photooxidation. The HALS prevents the degradation of MAI by inhibiting the oxidation of iodide to iodine. Chemical modification of HALS allows its incorporation in MAPI films, which extends the resistivity of MAPI against photodegradation in ambient air from a couple of hours to several days, while causing no significant changes in key properties, such as optical absorption and charge transport. These results represent an important advance in the stabilization of MAPI against decomposition and demonstrate for the first time that antioxidants improve the stability of MAPI.
[Mh] Termos MeSH primário: Compostos de Cálcio/química
Iodetos/química
Chumbo/química
Luz
Metilaminas/química
Óxidos/química
Oxigênio/química
Titânio/química
[Mh] Termos MeSH secundário: Estabilidade de Medicamentos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Calcium Compounds); 0 (Iodides); 0 (Methylamines); 0 (Oxides); 12194-71-7 (perovskite); 2P299V784P (Lead); BSF23SJ79E (methylamine); D1JT611TNE (Titanium); S88TT14065 (Oxygen)
[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:170802
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201700707



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