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Pesquisa : G01.645.750 [Categoria DeCS]
Referências encontradas : 11163 [refinar]
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[PMID]:28987403
[Au] Autor:Abraham J; Dowling K; Florentine S
[Ad] Endereço:School of Applied and Biomedical Sciences, Faculty of Science and Technology, Federation University Australia, Mount Helen Campus, VIC 3350, Australia. Electronic address: j.abraham@federation.edu.au.
[Ti] Título:Effects of prescribed fire and post-fire rainfall on mercury mobilization and subsequent contamination assessment in a legacy mine site in Victoria, Australia.
[So] Source:Chemosphere;190:144-153, 2018 Jan.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Prescribed fire conducted in fire-prone areas is a cost-effective choice for forest management, but it also affects many of the physicochemical and bio-geological properties of the forest soil, in a similar manner to wild fires. The aim of this study is to investigate the nature of the mercury mobilization after a prescribed fire and the subsequent temporal changes in concentration. A prescribed fire was conducted in a legacy mine site in Central Victoria, Australia, in late August 2015 and soil sample collection and analyses were carried out two days before and two days after the fire, followed by collection at the end of each season and after an intense rainfall event in September 2016. Results revealed the occurrence of mercury volatilization (8.3-97%) during the fire, and the mercury concentration displayed a significant difference (p < 0.05) before and immediately after the fire. Integrated assessment with number of pollution indices has shown that the study site is extremely contaminated with mercury during all the sampling events, and this poses a serious ecological risk due to the health impacts of mercury on human and ecosystems. In times of climate fluctuation with concomitant increase in forest fire (including prescribed fire), and subsequent precipitation and runoff, the potential for an increased amount of mercury being mobilized is of heighted significance. Therefore, it is recommended that prescribed fire should be cautiously considered as a forest management strategy in any mercury affected landscapes.
[Mh] Termos MeSH primário: Fogo
Mercúrio/análise
Mineração
Chuvas
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: Ecossistema
Poluição Ambiental/análise
Poluição Ambiental/prevenção & controle
Seres Humanos
Solo/química
Vitória
Volatilização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Soil Pollutants); FXS1BY2PGL (Mercury)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171009
[St] Status:MEDLINE


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[PMID]:28985534
[Au] Autor:Yadav IC; Devi NL; Li J; Zhang G
[Ad] Endereço:State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China; Department of International Environmental and Agricultural Science (IEAS), Tokyo University of Agriculture and Technology (TUAT), 3-5-8, Saiwai-Cho, Fuchu-Shi,
[Ti] Título:Organophosphate ester flame retardants in Nepalese soil: Spatial distribution, source apportionment and air-soil exchange assessment.
[So] Source:Chemosphere;190:114-123, 2018 Jan.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Despite soil being the major terrestrial environmental reservoir and one of the significant sinks for many hydrophobic organic compounds including organophosphate ester flame retardants (OPFRs), limited information is available about concentration and fate of OPFRs contamination in urban soil in general and especially in case of Nepal. This study investigates the environmental concentration, spatial distribution and source apportionment of eight OPFRs in surface soil (n = 28) from four major cities of Nepal with special interest on air-soil exchange. Overall, significantly high concentrations of ∑ OPFR were measured in soil ranging from 25-27,900 ng/g dw (median 248 ng/g dw). In terms of compositional pattern, tris(methyl phenyl) phosphate (TMPP) was the most abundant phosphorus chemical in soil, followed by tris(2-chloroisopropyl) phosphate (TCIPP), and accounted for 35-49% and 8-25% of ∑ OPFRs, respectively. The high level of these OPFRs was attributed to local sources as opposed to transboundary influence from remote areas. A Spearman's rank correlation analysis exhibited weak correlation of ∑ OPFRs with TOC (Rho = 0.117, p < 0.05) and BC (Rho = 0.007, p < 0.05), suggesting little or no influence of TOC and BC on the concentration of ∑ OPFRs. The fugacity fraction (ff) results indicated a strong influence of soil contamination on atmospheric level of OPFRs via volatilization.
[Mh] Termos MeSH primário: Retardadores de Chama/análise
Organofosfatos/análise
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: Poluentes Atmosféricos/análise
Poluentes Atmosféricos/química
Poluição do Ar/análise
Cidades
Nepal
Solo/química
Poluentes do Solo/química
Volatilização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Air Pollutants); 0 (Flame Retardants); 0 (Organophosphates); 0 (Soil); 0 (Soil Pollutants)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171007
[St] Status:MEDLINE


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[PMID]:28453957
[Au] Autor:Teng Z; Wang R; Zhou Y; Kolios M; Wang Y; Zhang N; Wang Z; Zheng Y; Lu G
[Ad] Endereço:Department of Medical Imaging, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, 210002 Jiangsu, PR China; State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093 Jiangsu, PR China.
[Ti] Título:A magnetic droplet vaporization approach using perfluorohexane-encapsulated magnetic mesoporous particles for ultrasound imaging and tumor ablation.
[So] Source:Biomaterials;134:43-50, 2017 Jul.
[Is] ISSN:1878-5905
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Phase change agents consisting of low boiling point perfluorocarbon (PFC) compounds have attracted increasing attention for ultrasound contrast-enhanced imaging and tumor therapy. However, the refraction, acoustic shadowing, reverberation, or limited penetration depth hamper their practical applications through previously reported acoustic droplet vaporization (ADV) or optical droplet vaporization (ODV) technique. Herein, we demonstrate a magnetic droplet vaporization (MDV) approach by loading perflurohexane (PFH) in magnetic mesoporous particles with a hollow space to carry out ultrasound imaging and tumor ablation. In vitro and in vivo magnetic thermal effects show that magnetic energy can be efficiently transformed into thermal energy by the PFH-encapsulated magnetic mesoporous particles, and then leading to vaporization of the loaded PFH. Owing to the generation of the PFH gas bubbles, the ultrasound signals are greatly improved in both harmonic mode and B mode. Simultaneously, anti-cancer experiments demonstrate that the tumor can be ablated after treating with the MDV method for 4 days, demonstrating highly efficient anti-cancer effects.
[Mh] Termos MeSH primário: Fluorcarbonetos/química
Ultrassonografia/métodos
[Mh] Termos MeSH secundário: Animais
Linhagem Celular Tumoral
Sobrevivência Celular/fisiologia
Meios de Contraste/química
Feminino
Células HEK293
Seres Humanos
Camundongos
Camundongos Endogâmicos BALB C
Neoplasias/diagnóstico por imagem
Neoplasias/terapia
Volatilização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Contrast Media); 0 (Fluorocarbons); FX3WJ41CMX (perflexane)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE


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[PMID]:28467361
[Au] Autor:Francioso A; Cossi R; Fanelli S; Mastromarino P; Mosca L
[Ad] Endereço:Department of Biochemical Sciences, "Sapienza" University of Rome, Piazzale Aldo Moro, 5, 00185 Roma, Italy. antonio.francioso@uniroma1.it.
[Ti] Título:Studies on Trans-Resveratrol/Carboxymethylated (1,3/1,6)-ß-d-Glucan Association for Aerosol Pharmaceutical Applications.
[So] Source:Int J Mol Sci;18(5), 2017 May 03.
[Is] ISSN:1422-0067
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:A resveratrol/carboxymethylated glucan (CM-glucan) combination is known to inhibit rhinovirus replication and expression of inflammatory mediators in nasal epithelia. The aim of this study was to develop an aerosol formulation containing an association of the two molecules which could reach the lower respiratory tract. Mass median aerodynamic diameter (MMAD) of a resveratrol/CM-glucan combination was lower than that shown by resveratrol or CM-glucan alone (2.83 versus 3.28 and 2.96 µm, respectively). The resveratrol/CM-glucan association results in the finest and most monodispersed particles in comparison to the two single components. The association also evidenced lower values for all particle size distribution parameters, suggesting that the pharmacological synergy observed in previous studies may be accompanied by a pharmaceutical one. Moreover, we showed that the CM-glucan matrix did not exert an inhibitory effect on resveratrol nebulization, demonstrating the good suitability of these two molecules in association for simultaneous aerosol volatilization.
[Mh] Termos MeSH primário: Anti-Inflamatórios não Esteroides/química
Anti-Inflamatórios não Esteroides/farmacologia
Antivirais/química
Antivirais/farmacologia
Estilbenos/química
Estilbenos/farmacologia
beta-Glucanas/química
[Mh] Termos MeSH secundário: Aerossóis
Sobrevivência Celular/efeitos dos fármacos
Células HeLa
Seres Humanos
Mucosa Nasal
Nebulizadores e Vaporizadores
Tamanho da Partícula
Rhinovirus/efeitos dos fármacos
Volatilização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Aerosols); 0 (Anti-Inflammatory Agents, Non-Steroidal); 0 (Antiviral Agents); 0 (Stilbenes); 0 (beta-Glucans); 9051-97-2 (beta-1,3-glucan); Q369O8926L (resveratrol)
[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:170504
[St] Status:MEDLINE


  5 / 11163 MEDLINE  
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[PMID]:29244496
[Au] Autor:Noestheden M; Dennis EG; Zandberg WF
[Ad] Endereço:University of British Columbia Okanagan , Kelowna, British Columbia V1V 1V7, Canada.
[Ti] Título:Quantitating Volatile Phenols in Cabernet Franc Berries and Wine after On-Vine Exposure to Smoke from a Simulated Forest Fire.
[So] Source:J Agric Food Chem;66(3):695-703, 2018 Jan 24.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Smoke-taint is a wine defect linked to organoleptic volatile phenols (VPs) in Vitis vinifera L. berries that have been exposed to smoke from wildland fires. Herein, the levels of smoke-taint-associated VPs are reported in Cabernet Franc berries from veraison to commercial maturity and in wine after primary fermentation following on-vine exposure to simulated wildland fire smoke. VPs increased after smoke exposure were rapidly stored as acid-labile conjugates, and the levels of both free VPs and conjugated forms remained constant through ripening to commercial maturity. An increase in total VPs after primary fermentation suggested the existence of VP-conjugates other than the acid-labile VP-glycosides already reported. This conclusion was supported with base hydrolysis on the same samples. Relative to published results, the data suggested a multifactorial regional identity for smoke-taint and they inform efforts to produce a predictive model for perceptible smoke-taint in wine based on the chemical composition of smoke-exposed berries.
[Mh] Termos MeSH primário: Frutas/química
Fenóis/química
Fumaça/análise
Vitis/química
Vinho/análise
[Mh] Termos MeSH secundário: Fermentação
Frutas/microbiologia
Vitis/crescimento & desenvolvimento
Vitis/microbiologia
Volatilização
Incêndios Florestais
Vinho/microbiologia
Leveduras/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Phenols); 0 (Smoke)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180207
[Lr] Data última revisão:
180207
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171216
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b04946


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[PMID]:29107875
[Au] Autor:Garcia MA; Anderson MA
[Ad] Endereço:Department of Environmental Sciences, University of California Riverside, USA. Electronic address: mgarc062@ucr.edu.
[Ti] Título:The Henry's constant of monochloramine.
[So] Source:Chemosphere;192:244-249, 2018 Feb.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Monochloramine is a secondary disinfectant used in drinking water and is also formed in chlorinated wastewater. While known to hydrolyze over time and react with dissolved organic matter, its partitioning between the aqueous and gas phase has not been extensively studied. Preliminary experiments demonstrated that monochloramine concentrations in solutions open to the atmosphere or actively aerated decreased more rapidly than in sealed solutions, indicating significant losses to the atmosphere. For example, a monochloramine solution open to the atmosphere yielded a loss rate constant of 0.08 d , a value twice that for sealed samples without headspace (0.04 d ) where loss occurs exclusively as a result of hydrolysis. A solution aerated at 10 mL s had a loss rate constant nearly 10× greater than that for hydrolysis alone (0.35 d ). To better understand partitioning of monochloramine to the gas phase and potential for volatilization, the dimensionless Henry's law constants of monochloramine (K ) were determined using an equilibrium headspace technique at five different temperatures (11, 16, 21, 27, and 32 °C). The resulting values ranged from 8 × 10 to 4 × 10 , indicating a semi-volatile compound, and were found to be consistent with quantitative structure activity relationship predictions. At 20 °C, monochloramine exhibits a dimensionless Henry's constant of about 1.7 × 10 which is 35 times greater than ammonia but comparable to the Henry's constant of inorganic semi-volatile compounds such sulfur dioxide. The Henry's constant values for monochloramine suggests that volatilization could be a relevant loss process in open systems such as rivers receiving chlorinated wastewater effluent, swimming pools and cooling towers.
[Mh] Termos MeSH primário: Algoritmos
Cloraminas/química
Desinfetantes/química
Água Potável/análise
[Mh] Termos MeSH secundário: Atmosfera
Cloraminas/análise
Desinfetantes/análise
Água Potável/química
Volatilização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Chloramines); 0 (Disinfectants); 0 (Drinking Water); KW8K411A1P (chloramine)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180130
[Lr] Data última revisão:
180130
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171107
[St] Status:MEDLINE


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[PMID]:29267391
[Au] Autor:Ren LL; Balakrishnan K; Luo YQ; Schütz S
[Ad] Endereço:Beijing Key Laboratory for Forest Pest Control, Beijing Forestry University, Beijing, P. R. China.
[Ti] Título:EAG response and behavioral orientation of Dastarcus helophoroides (Fairmaire) (Coleoptera: Bothrideridae) to synthetic host-associated volatiles.
[So] Source:PLoS One;12(12):e0190067, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Dastarcus helophoroides Fairmaire (Coleoptera: Bothrideridae) is an effective predatory beetle of larvae and pupae of several cerambycid beetles including Monochamus alternatus and Anoplophora glabripennis. Electroantennography (EAG) and a dynamic two-choice olfactometer were respectively used to measure the antennal and behavioral responses of both sexes to selected volatile compounds. Female and male D. helophoroides exhibited similar EAG and behavioral responses. Significant dose-dependent EAG responses in both sexes were elicited by nonanal, octanal, cis-3-hexenol, 3-carene, (R)-(+)-α-pinene, (S)-(-)-α-pinene, (R)-(+)-limonene and (S)-(-)-limonene. Female and male beetles were repelled at high concentration by cis-3-hexenol and (S)-(-)-limonene, respectively. Both sexes of D. helophoroides were significantly attracted to nonanal, cis-3-hexenol, 3-carene and (R)-(+)-limonene even at low concentrations. These compounds might be used either individually or in mixtures for developing biological control methods to attract this predatory beetle into forest stands threatened by cerambycid beetles.
[Mh] Termos MeSH primário: Comportamento Animal
Coleópteros/fisiologia
Volatilização
[Mh] Termos MeSH secundário: Animais
Feminino
Masculino
Odorantes
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180116
[Lr] Data última revisão:
180116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171222
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190067


  8 / 11163 MEDLINE  
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[PMID]:29211805
[Au] Autor:Chautá A; Whitehead S; Amaya-Márquez M; Poveda K
[Ad] Endereço:Departamento de Biología, Universidad Nacional de Colombia, Ciudad Universitaria, Bogotá, Colombia.
[Ti] Título:Leaf herbivory imposes fitness costs mediated by hummingbird and insect pollinators.
[So] Source:PLoS One;12(12):e0188408, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Plant responses induced by herbivore damage can provide fitness benefits, but can also have important costs due to altered interactions with mutualist pollinators. We examined the effects of plant responses to herbivory in a hummingbird-pollinated distylous shrub, Palicourea angustifolia. Through a series of field experiments we investigated whether damage from foliar herbivores leads to a reduction in fruit set, influences floral visitation, or alters floral traits that may influence pollinator preference or pollinator efficiency. Foliar herbivory by a generalist grasshopper led to reduced fruit set in branches that were directly damaged as well as in adjacent undamaged branches on the same plant. Furthermore, herbivory resulted in reduced floral visitation from two common hummingbird species and two bee species. An investigation into the potential mechanisms behind reduced floral visitation in induced plants showed that foliar herbivore damage resulted in shorter styles and lower nectar volumes. This reduction in style length could reduce pollen deposition between different floral morphs that is required for optimal pollination in a distylous plant. We did not detect any differences in the volatile blends released by damaged and undamaged branches, suggesting that foliar herbivore-induced changes in floral morphology and rewards, and not volatile blends, are the primary mechanism mediating changes in visitation. Our results provide novel mechanisms for how plant responses induced by foliar herbivores can lead to ecological costs.
[Mh] Termos MeSH primário: Aves/fisiologia
Herbivoria
Insetos/fisiologia
Folhas de Planta/fisiologia
Polinização
[Mh] Termos MeSH secundário: Animais
Flores/fisiologia
Volatilização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171229
[Lr] Data última revisão:
171229
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171207
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188408


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[PMID]:28873624
[Au] Autor:Amaral GV; Silva EK; Cavalcanti RN; Martins CPC; Andrade LGZS; Moraes J; Alvarenga VO; Guimarães JT; Esmerino EA; Freitas MQ; Silva MC; Raices RSL; Sant' Ana AS; Meireles MAA; Cruz AG
[Ad] Endereço:Universidade Federal Rural do Rio de Janeiro (UFRRJ), Instituto de Tecnologia (IT), 23890-000, Seropédica, Rio de Janeiro, Brazil.
[Ti] Título:Whey-grape juice drink processed by supercritical carbon dioxide technology: Physicochemical characteristics, bioactive compounds and volatile profile.
[So] Source:Food Chem;239:697-703, 2018 Jan 15.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The effect of supercritical carbon dioxide technology (SCCD, 14, 16, and 18MPa at 35±2°C for 10min) on whey-grape juice drink characteristics was investigated. Physicochemical characterization (pH, titratable acidity, total soluble solids), bioactive compounds (phenolic compounds, anthocyanin, DPPH and ACE activity) and the volatile compounds were performed. Absence of differences were found among treatments for pH, titratable acidity, soluble solids, total anthocyanin and DPPH activity (p-value>0.05). A direct relationship between SCCD pressure and ACE inhibitory activity was observed, with 34.63, 38.75, and 44.31% (14, 16, and 18MPa, respectively). Regards the volatile compounds, it was noted few differences except by the presence of ketones. The findings confirm the SCCD processing as a potential promising technology to the conventional thermal treatment.
[Mh] Termos MeSH primário: Bebidas
[Mh] Termos MeSH secundário: Antocianinas
Dióxido de Carbono
Fenômenos Químicos
Vitis
Volatilização
Soro do Leite
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anthocyanins); 142M471B3J (Carbon Dioxide)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171128
[Lr] Data última revisão:
171128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170907
[St] Status:MEDLINE


  10 / 11163 MEDLINE  
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[PMID]:28847108
[Au] Autor:Ke C; Ma X; Tang Y; Zheng W; Wu Z
[Ad] Endereço:Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, 510640 Guangzhou, China.
[Ti] Título:The volatilization of heavy metals during co-combustion of food waste and polyvinyl chloride in air and carbon dioxide/oxygen atmosphere.
[So] Source:Bioresour Technol;244(Pt 1):1024-1030, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The volatilization of three heavy metals (Cd, Cr and Zn) during food waste and PVC and their blending combustion in N /O or CO /O atmosphere in a lab-scale tubular furnace was investigated. The concentration of heavy metals in combustion ash was decreased with the increment of furnace temperature in most cases. The replacement of 80N /20O by 80CO /20O decreased the volatilization rate of Cd and Cr, but increased Zn. The increased amount of PVC added into food waste led to less content of Zn in combustion ash, 5% PVC added into food waste decreased the volatilization rate of Cr but 15% PVC added led to the higher volatilization. The volatilization rate of Zn in 70CO /30O was significantly lower than in 85CO /15O or 80CO /20O . The result contributes to the understanding of heavy metal volatilization during incineration and emission control of MSW oxy-fuel combustion.
[Mh] Termos MeSH primário: Metais Pesados
Cloreto de Polivinila
Eliminação de Resíduos
[Mh] Termos MeSH secundário: Dióxido de Carbono
Alimentos
Incineração
Oxigênio
Volatilização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 142M471B3J (Carbon Dioxide); 9002-86-2 (Polyvinyl Chloride); S88TT14065 (Oxygen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171025
[Lr] Data última revisão:
171025
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170830
[St] Status:MEDLINE



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