Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.100.500 [Categoria DeCS]
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  1 / 2300 MEDLINE  
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[PMID]:29251899
[Au] Autor:Kaur N; Jhanji S
[Ti] Título:Effect of soil cadmium on growth, photosynthesis and quality of Raphanus sativus and Lactuca sativa.
[So] Source:J Environ Biol;37(5):993-7, 2016 09.
[Is] ISSN:0254-8704
[Cp] País de publicação:India
[La] Idioma:eng
[Ab] Resumo:Cadmium (Cd) raises serious concerns as its accumulation in the plant not only affect the growth and quality of plant but also threaten the health of consumers. In this research, two vegetables, i.e., radish (Raphanus sativus L.) and lettuce (Lactuca sativa L), were planted in pots having soil treated with Cd as Cd (NO3)2 at different doses (25, 50, 100 and 200 mg Cd kg-1 soil ) to investigate the influence of cadmium on their growth, photosynthetic attributes and quality. Cadmium retarded plant growth as dry weight of radish roots decline by 87% and leaves by 83% following 200 mg Cd kg-1 soil application and the corresponding values for lettuce were 64 and 69% respectively. Significant reductions in various photosynthetic parameters viz., leaf area per plant, total chlorophyll, Chl a and Chl b content were also recorded with Cd applications. The Cd treatments resulted in loss of membrane integrity as revealed by significant increase in electrolyte leakage in leaves of both vegetables. There was significant increase in Cd accumulation in radish and lettuce with all applications but no visual symptoms of Cd toxicity were noticed with 25 and 50 mg Cd kg-1 soil application except for yield differences, illustrating that Cd accumulate in this crop without visual evidence of its presence. However, toxicity symptoms in the form of interveinal chlorosis of the leaf lamina, followed by necrosis and leaf rolling, were clearly evident with 100 and 200 mg Cd kg-1 soil application. Apparently, Cd causes harm due to its phytotoxic effects and high accumulation in edible parts of radish and lettuce without any visible symptoms that constitutes a substantial hazard to human health.
[Mh] Termos MeSH primário: Cádmio/toxicidade
Alface/efeitos dos fármacos
Fotossíntese/efeitos dos fármacos
Raphanus/efeitos dos fármacos
Poluentes do Solo/química
Solo/química
[Mh] Termos MeSH secundário: Cádmio/química
Clorofila/metabolismo
Folhas de Planta/efeitos dos fármacos
Folhas de Planta/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Soil Pollutants); 00BH33GNGH (Cadmium); 1406-65-1 (Chlorophyll)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180222
[Lr] Data última revisão:
180222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171219
[St] Status:MEDLINE


  2 / 2300 MEDLINE  
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[PMID]:29293328
[Au] Autor:Bhalsod GD; Chuang YH; Jeon S; Gui W; Li H; Ryser ET; Guber AK; Zhang W
[Ad] Endereço:Cook County Unit, University of Illinois Extension , Arlington Heights, Illinois 60004, United States.
[Ti] Título:Uptake and Accumulation of Pharmaceuticals in Overhead- and Surface-Irrigated Greenhouse Lettuce.
[So] Source:J Agric Food Chem;66(4):822-830, 2018 Jan 31.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Understanding the uptake and accumulation of pharmaceuticals in vegetables under typical irrigation practices is critical to risk assessment of crop irrigation with reclaimed water. This study investigated the pharmaceutical residues in greenhouse lettuce under overhead and soil-surface irrigations using pharmaceutical-contaminated water. Compared to soil-surface irrigation, overhead irrigation substantially increased the pharmaceutical residues in lettuce shoots. The increased residue levels persisted even after washing for trimethoprim, monensin sodium, and tylosin, indicating their strong sorption to the shoots. The postwashing concentrations in fresh shoots varied from 0.05 ± 0.04 µg/kg for sulfadiazine to 345 ± 139 µg/kg for carbamazepine. Root concentration factors ranged from 0.04 ± 0.14 for tylosin to 19.2 ± 15.7 for sulfamethoxazole. Translocation factors in surface-irrigated lettuce were low for sulfamethoxalzole, trimethoprim, monensin sodium, and tylosin (0.07-0.15), but high for caffeine (4.28 ± 3.01) and carbamazepine (8.15 ± 2.87). Carbamazepine was persistent in soil and hyperaccumulated in shoots.
[Mh] Termos MeSH primário: Irrigação Agrícola/métodos
Resíduos de Drogas/análise
Alface/metabolismo
Preparações Farmacêuticas/metabolismo
Poluentes Químicos da Água/metabolismo
[Mh] Termos MeSH secundário: Carbamazepina/análise
Contaminação de Alimentos
Alface/química
Monensin/análise
Preparações Farmacêuticas/análise
Folhas de Planta/química
Raízes de Plantas/química
Solo/química
Poluentes do Solo/análise
Poluentes do Solo/metabolismo
Sulfametoxazol/análise
Trimetoprima/análise
Tilosina/análise
Verduras
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Pharmaceutical Preparations); 0 (Soil); 0 (Soil Pollutants); 0 (Water Pollutants, Chemical); 33CM23913M (Carbamazepine); 906O0YJ6ZP (Monensin); AN164J8Y0X (Trimethoprim); JE42381TNV (Sulfamethoxazole); YEF4JXN031 (Tylosin)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180103
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b04355


  3 / 2300 MEDLINE  
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[PMID]:28935405
[Au] Autor:Ben Mordechay E; Tarchitzky J; Chen Y; Shenker M; Chefetz B
[Ad] Endereço:Department of Soil and Water Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 7610001, Israel; The Hebrew University Center of Excellence in Agriculture and Environmental Health, P.O. Box 12, Rehovot 7610001, Israel.
[Ti] Título:Composted biosolids and treated wastewater as sources of pharmaceuticals and personal care products for plant uptake: A case study with carbamazepine.
[So] Source:Environ Pollut;232:164-172, 2018 Jan.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Irrigation with treated wastewater (TWW) and application of biosolids to arable land expose the agro-environment to pharmaceuticals and personal care products (PPCPs) which can be taken up by crops. In this project, we studied the effect of a carrier medium (e.g., biosolids and TWW) on plant (tomato, wheat and lettuce) uptake, translocation and metabolism of carbamazepine as a model for non-ionic PPCPs. Plant uptake and bioconcentration factors were significantly lower in soils amended with biosolids compared to soils irrigated with TWW. In soils amended with biosolids and irrigated with TWW, the bioavailability of carbamazepine for plant uptake was moderately decreased as compared to plants grown in soils irrigated with TWW alone. While TWW acts as a continuous source of PPCPs, biosolids act both as a source and a sink for these compounds. Moreover, it appears that decomposition of the biosolids in the soil after amendment enhances their adsorptive properties, which in turn reduces the bioavailability of PPCPs in the soil environment. In-plant metabolism of carbamazepine was found to be independent of environmental factors, such as soil type, carrier medium, and absolute amount implemented to the soil, but was controlled by the total amount taken up by the plant.
[Mh] Termos MeSH primário: Carbamazepina/metabolismo
Produtos Agrícolas/metabolismo
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: Carbamazepina/análise
Compostagem
Alface/metabolismo
Solo
Poluentes do Solo/metabolismo
Eliminação de Resíduos Líquidos
Águas Residuais/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Soil Pollutants); 0 (Waste Water); 33CM23913M (Carbamazepine)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180209
[Lr] Data última revisão:
180209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170923
[St] Status:MEDLINE


  4 / 2300 MEDLINE  
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[PMID]:29198101
[Au] Autor:Shin JH; Hong J; Go H; Park J; Kong M; Ryu S; Kim KP; Roh E; Park JK
[Ad] Endereço:Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141, Republic of Korea.
[Ti] Título:Multiplexed Detection of Foodborne Pathogens from Contaminated Lettuces Using a Handheld Multistep Lateral Flow Assay Device.
[So] Source:J Agric Food Chem;66(1):290-297, 2018 Jan 10.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This paper presents a handheld device that is capable of simplifying multistep assays to perform sensitive detection of foodborne pathogens. The device is capable of multiplexed detection of Escherichia coli (E. coli) O157:H7, Salmonella Typhimurium (S. Typhimurium), Staphylococcus aureus, and Bacillus cereus. The limit of detection for each bacterium was characterized, and then, the detection of bacteria from contaminated fresh lettuces was demonstrated for two representative foodborne pathogens. We employed a sample pretreatment protocol to recover and concentrate target bacteria from contaminated lettuces, which can detect 1.87 × 10 CFU of E. coli O157:H7 and 1.47 × 10 CFU of S. Typhimurium/1 g of lettuce without an enrichment process. Lastly, we demonstrated that the limit of detection can be reduced to 1 CFU of E. coli O157:H7 and 1 CFU of S. Typhimurium/1 g of lettuce by including a 6 h enrichment of contaminated lettuces in growth media before pretreatment.
[Mh] Termos MeSH primário: Contaminação de Alimentos/análise
Microbiologia de Alimentos/métodos
Alface/microbiologia
[Mh] Termos MeSH secundário: Bacillus cereus/crescimento & desenvolvimento
Bacillus cereus/isolamento & purificação
Escherichia coli O157/crescimento & desenvolvimento
Escherichia coli O157/isolamento & purificação
Microbiologia de Alimentos/instrumentação
Salmonella typhimurium/crescimento & desenvolvimento
Salmonella typhimurium/isolamento & purificação
Staphylococcus aureus/crescimento & desenvolvimento
Staphylococcus aureus/isolamento & purificação
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180205
[Lr] Data última revisão:
180205
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171205
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b03582


  5 / 2300 MEDLINE  
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[PMID]:28941906
[Au] Autor:Yang Z; Chambers H; DiCaprio E; Gao G; Li J
[Ad] Endereço:Department of Biology, College of Life Science, Huzhou University, Huzhou, Zhejiang, China.
[Ti] Título:Internalization and dissemination of human norovirus and Tulane virus in fresh produce is plant dependent.
[So] Source:Food Microbiol;69:25-32, 2018 Feb.
[Is] ISSN:1095-9998
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Human norovirus (NoV) is a leading cause of fresh produce associated outbreaks. Previous research indicates that the roots of growing leafy greens and berries internalize human NoV. However the effect of plant type and inoculum level on internalization rates has not been directly compared. In this study we compared the internalization and dissemination rates of human NoV and its surrogate, Tulane virus (TV) in green onion, radishes, and Romaine lettuce. We also evaluated the effect inoculum level and plant growth matrix on the rate of viral internalization. In the hydroponic growth system, we detected internalization and dissemination of human NoV RNA in green onions. In hydroponically growing green onions inoculated with high titer TV, we found higher rates of internalization and dissemination compared to green onions inoculated with low titer TV. In soil growth systems, no infectious TV was detected in either green onion or radishes. However, in Romaine lettuce plants grown in soil approximately 4 log PFU/g was recovered from all tissues on day 14 p.i. Overall, we found that the type of plant, growth matrix, and the inoculum level influences the internalization and dissemination of human NoV and TV.
[Mh] Termos MeSH primário: Caliciviridae/fisiologia
Contaminação de Alimentos/análise
Alface/virologia
Norovirus/fisiologia
Cebolas/virologia
Raphanus/virologia
Verduras/virologia
Internalização do Vírus
[Mh] Termos MeSH secundário: Caliciviridae/genética
Caliciviridae/isolamento & purificação
Seres Humanos
Alface/crescimento & desenvolvimento
Norovirus/genética
Norovirus/isolamento & purificação
Cebolas/crescimento & desenvolvimento
Raphanus/crescimento & desenvolvimento
Microbiologia do Solo
Verduras/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:180116
[Lr] Data última revisão:
180116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170925
[St] Status:MEDLINE


  6 / 2300 MEDLINE  
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[PMID]:28585369
[Au] Autor:Verma RS; Joshi N; Padalia RC; Singh VR; Goswami P; Verma SK; Iqbal H; Chanda D; Verma RK; Darokar MP; Chauhan A; Kandwal MK
[Ad] Endereço:CSIR-Central Institute of Medicinal and Aromatic Plants, Research Centre Pantnagar, Udham Singh Nagar, Uttarakhand, India.
[Ti] Título:Chemical composition and antibacterial, antifungal, allelopathic and acetylcholinesterase inhibitory activities of cassumunar-ginger.
[So] Source:J Sci Food Agric;98(1):321-327, 2018 Jan.
[Is] ISSN:1097-0010
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Zingiber montanum (J.Koenig) Link ex A.Dietr. (Zingiberaceae), commonly known as cassumunar-ginger, is a folk remedy for the treatment of inflammations, sprains, rheumatism and asthma. The aim of the present study was to assess the chemical composition, and antibacterial, antifungal, allelopathic and acetylcholinesterase inhibitory activities of the essential oil of Z. montanum originating from India. RESULTS: The hydrodistilled essential oil of Z. montanum rhizome was analyzed using gas chromatography-flame ionization detection and gas chromatography-mass spectrometry. A total of 49 constituents, forming 98.7-99.9% of the total oil compositions, was identified. The essential oil was characterized by higher amount of monoterpene hydrocarbons (32.6-43.5%), phenylbutanoids (27.5-41.2%) and oxygenated monoterpenes (11.4-34.1%). Major constituents of the oil were sabinene (13.5-38.0%), (E)-1-(3',4'-dimethoxyphenyl)buta-1,3-diene (DMPBD) (20.6-35.3%), terpinen-4-ol (9.0-31.3%), γ-terpinene (1.1-4.8%) and ß-phellandrene (1.0-4.4%). The oil was evaluated against eight pathogenic bacteria and two fungal strains. It exhibited low to good antibacterial activity (minimum inhibitory concentration: 125-500 µg mL ) and moderate antifungal activity (250 µg mL ) against the tested strains. The oil reduced germination (69.8%) and inhibited the root and shoot growth of lettuce significantly (LD : 3.58 µL plate ). However, it did not demonstrate acetylcholinesterase inhibitory activity up to a concentration of 10 mg mL . CONCLUSIONS: The essential oil of Z. montanum can be used as a potential source of DMPBD, terpinen-4-ol and sabinene for pharmaceutical products. The results of the present study add significant information to the pharmacological activity of Z. montanum native to India. © 2017 Society of Chemical Industry.
[Mh] Termos MeSH primário: Antibacterianos/química
Antifúngicos/química
Inibidores da Colinesterase/química
Feromônios/química
Extratos Vegetais/química
Zingiberaceae/química
[Mh] Termos MeSH secundário: Acetilcolinesterase/química
Alelopatia
Antibacterianos/farmacologia
Antifúngicos/farmacologia
Bactérias/efeitos dos fármacos
Inibidores da Colinesterase/farmacologia
Fungos/efeitos dos fármacos
Alface/efeitos dos fármacos
Alface/crescimento & desenvolvimento
Feromônios/farmacologia
Extratos Vegetais/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Antifungal Agents); 0 (Cholinesterase Inhibitors); 0 (Pheromones); 0 (Plant Extracts); EC 3.1.1.7 (Acetylcholinesterase)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171228
[Lr] Data última revisão:
171228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170607
[St] Status:MEDLINE
[do] DOI:10.1002/jsfa.8474


  7 / 2300 MEDLINE  
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[PMID]:29045498
[Au] Autor:Elamin AA; Steinicke S; Oehlmann W; Braun Y; Wanas H; Shuralev EA; Huck C; Maringer M; Rohde M; Singh M
[Ad] Endereço:LIONEX Diagnostics and Therapeutics GmbH, Braunschweig, Germany.
[Ti] Título:Novel drug targets in cell wall biosynthesis exploited by gene disruption in Pseudomonas aeruginosa.
[So] Source:PLoS One;12(10):e0186801, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:For clinicians, Pseudomonas aeruginosa is a nightmare pathogen that is one of the top three causes of opportunistic human infections. Therapy of P. aeruginosa infections is complicated due to its natural high intrinsic resistance to antibiotics. Active efflux and decreased uptake of drugs due to cell wall/membrane permeability appear to be important issues in the acquired antibiotic tolerance mechanisms. Bacterial cell wall biosynthesis enzymes have been shown to be essential for pathogenicity of Gram-negative bacteria. However, the role of these targets in virulence has not been identified in P. aeruginosa. Here, we report knockout (k.o) mutants of six cell wall biosynthesis targets (murA, PA4450; murD, PA4414; murF, PA4416; ppiB, PA1793; rmlA, PA5163; waaA, PA4988) in P. aeruginosa PAO1, and characterized these in order to find out whether these genes and their products contribute to pathogenicity and virulence of P. aeruginosa. Except waaA k.o, deletion of cell wall biosynthesis targets significantly reduced growth rate in minimal medium compared to the parent strain. The k.o mutants showed exciting changes in cell morphology and colonial architectures. Remarkably, ΔmurF cells became grossly enlarged. Moreover, the mutants were also attenuated in vivo in a mouse infection model except ΔmurF and ΔwaaA and proved to be more sensitive to macrophage-mediated killing than the wild-type strain. Interestingly, the deletion of the murA gene resulted in loss of virulence activity in mice, and the virulence was restored in a plant model by unknown mechanism. This study demonstrates that cell wall targets contribute significantly to intracellular survival, in vivo growth, and pathogenesis of P. aeruginosa. In conclusion, these findings establish a link between cell wall targets and virulence of P. aeruginosa and thus may lead to development of novel drugs for the treatment of P. aeruginosa infection.
[Mh] Termos MeSH primário: Antibacterianos/farmacologia
Vias Biossintéticas/efeitos dos fármacos
Parede Celular/metabolismo
Técnicas de Silenciamento de Genes
Pseudomonas aeruginosa/citologia
Pseudomonas aeruginosa/genética
[Mh] Termos MeSH secundário: Animais
Parede Celular/efeitos dos fármacos
Parede Celular/genética
Contagem de Colônia Microbiana
DNA Bacteriano/genética
Espaço Extracelular/química
Feminino
Genes Bacterianos
Vetores Genéticos/metabolismo
Alface/microbiologia
Lipopolissacarídeos/biossíntese
Pulmão/microbiologia
Pulmão/patologia
Macrófagos/microbiologia
Camundongos
Modelos Biológicos
Mutação/genética
Peptidoglicano/biossíntese
Doenças das Plantas/microbiologia
Infecções por Pseudomonas/microbiologia
Pseudomonas aeruginosa/crescimento & desenvolvimento
Pseudomonas aeruginosa/patogenicidade
Doenças Respiratórias/microbiologia
Doenças Respiratórias/patologia
Virulência/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (DNA, Bacterial); 0 (Lipopolysaccharides); 0 (Peptidoglycan)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171019
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0186801


  8 / 2300 MEDLINE  
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[PMID]:28890992
[Au] Autor:Chen C; Zhao T; Liu R; Luo L
[Ad] Endereço:Agricultural Clean Watershed Innovation Group, Institute of Environment and Sustainable Development in Agriculture, CAAS; Key Laboratory for Agricultural Environment MOA, Beijing, 100081, China.
[Ti] Título:Performance of five plant species in removal of nitrogen and phosphorus from an experimental phytoremediation system in the Ningxia irrigation area.
[So] Source:Environ Monit Assess;189(10):497, 2017 Sep 10.
[Is] ISSN:1573-2959
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Agricultural non-point source (ANPS) pollution is an important contributor to elevated nitrogen (N) and phosphorus (P) in surface waters, which can cause serious environmental problems. Considerable effort has therefore gone into the development of methods that control the ANPS input of N and P to surface waters. Phytoremediation has been extensively used because it is cost-effective, environmentally friendly, and efficient. The N and P loads from agricultural drainage are a potential threat to the water quality of the Yellow River in Ningxia, China. Yet, phytoremediation has only rarely been applied within the Ningxia irrigation area. In an experimental set-up, five species (Ipomoea aquatica, IA; Lactuca sativa, LS; Oryza sativa, OS; Typha latifolia, TL; Zizania latifolia, ZL) were evaluated for their ability to reduce N and P loads over 62 days and five observation periods. Total N and P concentrations, plant biomass, and nutrient content were measured. The results showed that OS, LS, and IA performed better than ZL and TL in terms of nutrients removal, biomass accumulation, and nutrients storage. The highest overall removal rates of N and P (57.7 and 57.3%, respectively) were achieved by LS treatment. In addition, plant uptake contributed significantly to nutrient removal, causing a 25.9-72.0% reduction in N removal and a 54.3-86.5% reduction in P removal. Thus, this study suggests that OS, LS, and IA would be more suitable than ZL and TL for controlling nutrient loads in the Ningxia irrigation area using phytoremediation.
[Mh] Termos MeSH primário: Nitrogênio/metabolismo
Fósforo/metabolismo
Plantas/metabolismo
Poluição da Água/prevenção & controle
[Mh] Termos MeSH secundário: Irrigação Agrícola/normas
Biodegradação Ambiental
Biomassa
China
Monitoramento Ambiental
Eutrofização
Ipomoea/metabolismo
Alface/metabolismo
Nitrogênio/análise
Oryza/metabolismo
Fósforo/análise
Plantas/classificação
Poaceae/metabolismo
Distribuição Aleatória
Rios
Typhaceae/metabolismo
Qualidade da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
27YLU75U4W (Phosphorus); N762921K75 (Nitrogen)
[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:170912
[St] Status:MEDLINE
[do] DOI:10.1007/s10661-017-6213-y


  9 / 2300 MEDLINE  
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[PMID]:28854232
[Au] Autor:Shrestha G; Skovgård H; Reddy GVP; Steenberg T; Enkegaard A
[Ad] Endereço:Western Triangle Ag Research Center, Montana State University, Conrad, MT, United States of America.
[Ti] Título:Role of the aphid species and their feeding locations in parasitization behavior of Aphelinus abdominalis, a parasitoid of the lettuce aphid Nasonovia ribisnigri.
[So] Source:PLoS One;12(8):e0184080, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Aphid species feeding on lettuce occupy distinct feeding sites: the lettuce aphid Nasonovia ribisnigri prefers to feed on heart leaves, whereas the potato aphid Macrosiphum euphorbiae feeds only on outer leaves. The aphid parasitoid Aphelinus abdominalis, known to be able to regulate M. euphorbiae on many crops, has recently been indicated as a promising biocontrol candidate also for use against N. ribisnigri, a major pest of lettuce. This study therefore examined A. abdominalis parasitization preference between N. ribisnigri and M. euphorbiae and its ability to parasitize aphids feeding on different parts of lettuce plants. In addition, life history traits of A. abdominalis on these aphid species were investigated. In no-choice laboratory experiments on leaf discs and 24 h exposure, A. abdominalis successfully parasitized 54% and 60% of the offered N. ribisnigri and M. euphorbiae, respectively, with no significant difference. In the corresponding choice experiment, however, A. abdominalis had a tendency for a significantly higher preference for M. euphorbiae (38%) compared to N. ribisnigri (30%). Growth chamber experiments on whole plants demonstrated that A. abdominalis was able to parasitize aphids, regardless of their feeding locations on lettuce plants. However, aphid feeding behavior had a significant effect on the parasitization rate. A. abdominalis parasitized significantly higher percentages of M. euphorbiae or N. ribisnigri when aphids were exposed separately to parasitoids on whole lettuce plants as compared with N. ribisnigri exposed only on heart leaf. A significant preference of A. abdominalis for M. euphorbiae compared to N. ribisnigri was also observed in the growth chamber choice experiment. A high percentage of adult emergence (> 84%) and female-biased sex ratio (> 83%) were found irrespective of the aphid species.
[Mh] Termos MeSH primário: Afídeos/parasitologia
Himenópteros/fisiologia
Alface/parasitologia
Controle Biológico de Vetores/métodos
[Mh] Termos MeSH secundário: Animais
Afídeos/fisiologia
Feminino
Himenópteros/crescimento & desenvolvimento
Masculino
Doenças das Plantas/parasitologia
Doenças das Plantas/prevenção & controle
[Pt] Tipo de publicação:JOURNAL ARTICLE
[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:170831
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0184080


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[PMID]:28853631
[Au] Autor:Shazer A; Stewart D; Deng K; Tortorello M
[Ad] Endereço:1 U.S. Food and Drug Administration, Division of Food Processing Science and Technology, Illinois Institute of Technology, 6502 South Archer Road, Bedford Park, Illinois 60501, USA.
[Ti] Título:Approaches toward Identification of Surrogates To Validate Antimicrobial Washes as Preventive Controls for Fresh-Cut Leafy Greens.
[So] Source:J Food Prot;80(10):1600-1604, 2017 Oct.
[Is] ISSN:1944-9097
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In fresh-cut produce production, antimicrobials may be used during washing to control the risk of cross-contamination by microbial hazards. Surrogate microorganisms have long been used to validate processes, but none have been identified for validating the efficacy of antimicrobial washing of fresh-cut produce. The objective of this study was to develop procedures by which surrogates may be identified for use in validating the control of cross-contamination for fresh-cut lettuce operations. Four microbial characteristics, which may be important factors in cross-contamination events, were quantitatively evaluated in potential surrogate microorganisms for comparison to a reasonably foreseeable hazard, Escherichia coli O157:H7: sensitivity to chlorine in solution, sensitivity to chlorine on lettuce leaf surfaces, shedding from contaminated lettuce leaves into the water during washing, and cross-contamination from inoculated to uninoculated lettuce leaves during chorine washing. A procedure of practical quantitative experiments for comparing the characteristics reduced the original pool of 80 potential strains, which consisted of lactic acid bacteria, probiotics, and isolates obtained from lettuce enrichment cultures, to five strains: Lactobacillus plantarum, Pediococcus pentosaceus, probiotic 22C, and two lettuce enrichment isolates. These strains may be evaluated in additional studies involving comparisons to other reasonably foreseeable hazards and including other potential process variables that should be understood and controlled to prevent cross-contamination in fresh-cut lettuce operations.
[Mh] Termos MeSH primário: Anti-Infecciosos/farmacologia
Escherichia coli O157/efeitos dos fármacos
Manipulação de Alimentos/métodos
Alface/microbiologia
Viabilidade Microbiana/efeitos dos fármacos
[Mh] Termos MeSH secundário: Contagem de Colônia Microbiana
Escherichia coli O157/crescimento & desenvolvimento
Contaminação de Alimentos/prevenção & controle
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Infective Agents)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170831
[St] Status:MEDLINE
[do] DOI:10.4315/0362-028X.JFP-17-069



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