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[PMID]:29430914
[Au] Autor:Alekseev II; Abakumov EV; Shamilishvili GA; Lodygin ED
[Ti] Título:[Heavy metals and hydrocarbons content in soils of settlements of the Yamal-Nenets autonomous region].
[So] Source:Gig Sanit;95(9):818-21, 2016.
[Is] ISSN:0016-9900
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:In August 2015 there were executed investigations on the study of the soils diversity of the Yamal-Nenets Autonomous Okrug. One of the directions of this work got be the study of urban soils of settlements of the Yamal-Nenents Autonomous Okrug. The sectors for the observation were settlement of Harsaim, village Aksarka, city of Salekhard, settlement Harp and city of Labytnangi. About 20 soil samples were collected during the field work. Samples were collected from a depth of 0-5 cm and 5-20 cm. Heavy metals (HM) were detected with the use of X-ray fluorescent analyzer "Spectroscan-MAX". The HM content values were compared with the corresponding Approxible Permissible Concentrations and Maximum Allowable Concentrations (MAC) adopted in Russia. Hydrocarbons content was determined by gravimetric method. Values of the hydrocarbons content in studied soils were compared with the existing regulations of the Russian Federation. The levels of soil contamination by hydrocarbons were determined. The study of soil samples from different settlements allowed to reveal characteristic features of soil contamination of separate settlements by HM and hydrocarbons and to compare them against each other. The vast majority of samples are characterized by arsenic exceedance of MAC, which should indicate to a high regional background of this element. For a more adequate assessment of the Zc meaning as the value of the total pollution index of soils there were used not only arithmetical average values of the coefficients of the chemical composition concentration (Kc), but also their average geometric values. According to levels of total soil contamination most of soil samples are characterized as non-hazardous (Zc<16). Calculation of soil pollution index showed that the most of soil samples have values less than 1. It characterizes soils as unpolluted. Statistical processing of obtained data in the media of the analytical software interface STATISTICA 10 showed a statistically significant difference in the content ofHM and hydrocarbons for the layer of 0-20 cm of the soils for three elements (Cu, Zn, Ni).
[Mh] Termos MeSH primário: Arsênico/análise
Monitoramento Ambiental
Indústrias Extrativas e de Processamento
Hidrocarbonetos/análise
Metais Pesados/análise
[Mh] Termos MeSH secundário: Monitoramento Ambiental/métodos
Monitoramento Ambiental/estatística & dados numéricos
Indústrias Extrativas e de Processamento/métodos
Indústrias Extrativas e de Processamento/normas
Seres Humanos
Concentração Máxima Permitida
Saúde da População
Saúde Pública/métodos
Saúde Pública/normas
Federação Russa/epidemiologia
Solo/química
Poluentes do Solo/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hydrocarbons); 0 (Metals, Heavy); 0 (Soil); 0 (Soil Pollutants); N712M78A8G (Arsenic)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180213
[St] Status:MEDLINE


  2 / 9867 MEDLINE  
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[PMID]:28271743
[Au] Autor:Wu H; Sun L; Wang H; Wang X
[Ad] Endereço:a Key Laboratory of Regional Environment and Eco-Remediation , Ministry of Education, Shenyang University , Shenyang , People's Republic of China.
[Ti] Título:In situ sodium persulfate/calcium peroxide oxidation in remediation of TPH-contaminated soil in 3D-sand box.
[So] Source:Environ Technol;39(1):91-101, 2018 Jan.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aim of this article was to obtain the application parameters and conditions of in situ sodium persulfate/calcium peroxide oxidation. For the purposes of remediation, soil from a total petroleum hydrocarbons (TPH)-contaminated site was collected and prepared to reflect the actual stratum condition in a newly developed soil remediation modeling apparatus. Application methods of soil mixture, natural infiltration, direct injection and groundwater circulation were used to simulate in situ sodium persulfate oxidation in TPH-contaminated soil. Results showed that the transfer capability of Na S O in simulated soil was strong Na S O migrated to the saturated layer after 3 days of in situ injection, which then continued both horizontal and vertical migration. After 7 days the oxidant was widespread in the saturated layer with a radius of influence of 0.4 m. It was found that mixing CaO /Fe /CA with soil and spraying Na S O can effectively repair the surface-contaminated soil, and the longitudinal migration of Na S O in the reaction process can further strengthen the remediation of the upper layer soil. Due to the buffering effect of the soil, the effect of oxidation on the pH and temperature of different soil layers was small, but detectable in comparison to natural environmental factors.
[Mh] Termos MeSH primário: Recuperação e Remediação Ambiental/métodos
Hidrocarbonetos/química
Peróxidos/química
Poluição por Petróleo/análise
Petróleo/análise
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: Oxirredução
Petróleo/metabolismo
Compostos de Sódio
Poluentes do Solo/química
Sulfatos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hydrocarbons); 0 (Peroxides); 0 (Petroleum); 0 (Sodium Compounds); 0 (Soil Pollutants); 0 (Sulfates); 7FRO2ENO91 (calcium peroxide); J49FYF16JE (sodium persulfate)
[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:170309
[St] Status:MEDLINE
[do] DOI:10.1080/09593330.2017.1296029


  3 / 9867 MEDLINE  
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[PMID]:28986238
[Au] Autor:Villalta I; Amor F; Galarza JA; Dupont S; Ortega P; Hefetz A; Dahbi A; Cerdá X; Boulay R
[Ad] Endereço:Estación Biológica de Doñana, CSIC, Avenida Américo Vespucio 26, 41092 Sevilla, Spain; Institute of Insect Biology, Parc de Grandmont, 37200 Tours, France; Departamento de Ecología, Universidad de Granada, Avenida de la Fuente Nueva S/N, 18071 Granada, Spain.
[Ti] Título:Origin and distribution of desert ants across the Gibraltar Straits.
[So] Source:Mol Phylogenet Evol;118:122-134, 2018 Jan.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The creation of geographic barriers has long been suspected to contribute to the formation of new species. We investigated the phylogeography of desert ants in the western Mediterranean basin in order to elucidate their mode of diversification. These insects which have a low dispersal capacity are recently becoming important model systems in evolutionary studies. We conducted an extensive sampling of species belonging to the Cataglyphis albicans group in the Iberian Peninsula (IP) and the northern Morocco (North Africa; NA). We then combined genetic, chemical and morphological analyses. The results suggest the existence of at least three and five clades in the IP and NA, respectively, whose delineation partially encompass current taxonomic classification. The three Iberian clades are monophyletic, but their origin in NA is uncertain (79% and 22% for Bayesian and Maximum Likelihood support, respectively). The estimation of divergence time suggests that a speciation process was initiated after the last reopening of the Gibraltar Straits ≈5.33 Ma. In the IP, the clades are parapatric and their formation may have been triggered by the fragmentation of a large population during the Pleistocene due to extended periods of glaciation. This scenario is supported by demographic analyses pointing at a recent expansion of Iberian populations that contrasts with the progressive contraction of the NA clades. Niche modeling reveals that this area, governed by favorable climatic conditions for desert ants, has recently increased in the IP and decreased in NA. Altogether, our data points at geoclimatic events as major determinants of species formation in desert ants, reinforcing the role of allopatric speciation.
[Mh] Termos MeSH primário: Formigas/fisiologia
Evolução Biológica
[Mh] Termos MeSH secundário: África do Norte
Animais
Formigas/anatomia & histologia
Formigas/genética
Teorema de Bayes
Demografia
Análise Discriminante
Europa (Continente)
Variação Genética
Gibraltar
Hidrocarbonetos/metabolismo
Funções Verossimilhança
Masculino
Repetições de Microssatélites/genética
Modelos Biológicos
Marrocos
Filogenia
Filogeografia
Análise de Componente Principal
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hydrocarbons)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171008
[St] Status:MEDLINE


  4 / 9867 MEDLINE  
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[PMID]:29024884
[Au] Autor:Mosquera-Vivas CS; Martinez MJ; García-Santos G; Guerrero-Dallos JA
[Ad] Endereço:Department of Chemistry, Faculty of Science, Universidad Nacional de Colombia, Bogotá D.C. 11001, Colombia. Electronic address: carmencita.mosquera@gmail.com.
[Ti] Título:Adsorption-desorption and hysteresis phenomenon of tebuconazole in Colombian agricultural soils: Experimental assays and mathematical approaches.
[So] Source:Chemosphere;190:393-404, 2018 Jan.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The adsorption-desorption, hysteresis phenomenon, and leachability of tebuconazole were studied for Inceptisol and Histosol soils at the surface (0-10 cm) and in the subsurface (40-50 cm) of an agricultural region from Colombia by the batch-equilibrium method and mathematical approaches. The experimental K and K (L kg ) values (7.9-289.2) decreased with depth for the two Inceptisols and increased with depth for the Histosol due to the organic carbon content, aryl and carbonyl carbon types. Single-point and desorption isotherms depended on adsorption reversibility and suggested that tebuconazole showed hysteresis; which can be adequately evaluated with the single-point desorption isotherm and the linear model using the hysteresis index HI. The most suitable mathematical approach to estimate the adsorption isotherms of tebuconazole at the surface and in the subsurface was that considering the combination of the n-octanol-water partition coefficient, pesticide solubility, and the mass-balance concept. Tebuconazole had similar moderate mobility potential as compared with the values of other studies conducted in temperate amended and unamended soils, but the risk of the fungicide to pollute groundwater sources increased when the pesticide reached subsurface soil layers, particularly in the Inceptisols.
[Mh] Termos MeSH primário: Adsorção
Modelos Teóricos
Poluentes do Solo/análise
Solo
Triazóis/química
[Mh] Termos MeSH secundário: 1-Octanol
Agricultura
Colômbia
Fungicidas Industriais/análise
Fungicidas Industriais/química
Hidrocarbonetos
Praguicidas
Poluentes do Solo/química
Poluentes do Solo/isolamento & purificação
Solubilidade
Triazóis/isolamento & purificação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fungicides, Industrial); 0 (Hydrocarbons); 0 (Pesticides); 0 (Soil); 0 (Soil Pollutants); 0 (Triazoles); 0 (histosol); 401ATW8TRW (tebuconazole); NV1779205D (1-Octanol)
[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:171013
[St] Status:MEDLINE


  5 / 9867 MEDLINE  
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[PMID]:29293540
[Au] Autor:Liao D; Li E; Li J; Zeng P; Feng R; Xu M; Sun G
[Ad] Endereço:South China University of Technology, Guangzhou, China.
[Ti] Título:Removal of benzene, toluene, xylene and styrene by biotrickling filters and identification of their interactions.
[So] Source:PLoS One;13(1):e0189927, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Biotrickling filters (BTFs) are becoming very potential means to purify waste gases containing multiple VOC components, but the removal of the waste gases by BTF has been a major challenge due to the extremely complicated interactions among the components. Four biotrickling filters packed with polyurethane foam were employed to identify the interactions among four aromatic compounds (benzene, toluene, xylene and styrene). The elimination capacities obtained at 90% of removal efficiency for individual toluene, styrene and xylene were 297.02, 225.27 and 180.75 g/m3h, respectively. No obvious removal for benzene was observed at the inlet loading rates ranging from 20 to 450 g/m3h. The total elimination capacities for binary gases significantly decreased in all biotrickling filters. However, the removal of benzene was enhanced in the presence of other gases. The removal capacities of ternary and quaternary gases were further largely lowered. High-throughput sequencing results revealed that microbial communities changed greatly with the composition of gases, from which we found that: all samples were dominated either by the genus Achromobacter or the Burkholderia. Different gaseous combination enriched or inhibited some microbial species. Group I includes samples of BTFs treating single and binary gases and was dominated by the genus Achromobacter, with little Burkholderia inside. Group II includes the rest of the samples taken from BTFs domesticated with ternary and quaternary gases, and was dominated by the genus Burkholderia, with little Achromobacter detected. These genera were highly associated with the biodegradation of benzene series in BTFs.
[Mh] Termos MeSH primário: Poluentes Ambientais/isolamento & purificação
Hidrocarbonetos/isolamento & purificação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Hydrocarbons)
[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:180103
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189927


  6 / 9867 MEDLINE  
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[PMID]:29261711
[Au] Autor:Al-Sabahi J; Bora T; Al-Abri M; Dutta J
[Ad] Endereço:Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, Al-Khoudh, Oman.
[Ti] Título:Efficient visible light photocatalysis of benzene, toluene, ethylbenzene and xylene (BTEX) in aqueous solutions using supported zinc oxide nanorods.
[So] Source:PLoS One;12(12):e0189276, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Benzene, toluene, ethylbenzene and xylenes (BTEX) are some of the common environmental pollutants originating mainly from oil and gas industries, which are toxic to human as well as other living organisms in the ecosystem. Here we investigate photocatalytic degradation of BTEX under visible light irradiation using supported zinc oxide (ZnO) nanorods grown on glass substrates using a microwave assisted hydrothermal method. ZnO nanorods were characterized by electron microscopy, X-ray diffraction (XRD), specific surface area, UV/visible absorption and photoluminescence spectroscopy. Visible light photocatalytic degradation products of BTEX are studied for individual components using gas chromatograph/mass spectrometer (GC/MS). ZnO nanorods with significant amount of electronic defect states, due to the fast crystallization of the nanorods under microwave irradiation, exhibited efficient degradation of BTEX under visible light, degrading more than 80% of the individual BTEX components in 180 minutes. Effect of initial concentration of BTEX as individual components is also probed and the photocatalytic activity of the ZnO nanorods in different conditions is explored. Formation of intermediate byproducts such as phenol, benzyl alcohol, benzaldehyde and benzoic acid were confirmed by our HPLC analysis which could be due to the photocatalytic degradation of BTEX. Carbon dioxide was evaluated and showed an increasing pattern over time indicating the mineralization process confirming the conversion of toxic organic compounds into benign products.
[Mh] Termos MeSH primário: Hidrocarbonetos/química
Luz
Nanotubos
Água/química
Óxido de Zinco/química
[Mh] Termos MeSH secundário: Catálise
Cromatografia Líquida de Alta Pressão
Microscopia Eletrônica de Varredura
Difração de Pó
Soluções
Espectrofotometria Ultravioleta
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hydrocarbons); 0 (Solutions); 059QF0KO0R (Water); SOI2LOH54Z (Zinc Oxide)
[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:171221
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189276


  7 / 9867 MEDLINE  
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[PMID]:29261775
[Au] Autor:Elia M; Blancato G; Picchi L; Lucas C; Bagnères AG; Lorenzi MC
[Ad] Endereço:Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy.
[Ti] Título:Nest signature changes throughout colony cycle and after social parasite invasion in social wasps.
[So] Source:PLoS One;12(12):e0190018, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Social insects recognize their nestmates by means of a cuticular hydrocarbon signature shared by colony members, but how nest signature changes across time has been rarely tested in longitudinal studies and in the field. In social wasps, the chemical signature is also deposited on the nest surface, where it is used by newly emerged wasps as a reference to learn their colony odor. Here, we investigate the temporal variations of the chemical signature that wasps have deposited on their nests. We followed the fate of the colonies of the social paper wasp Polistes biglumis in their natural environment from colony foundation to decline. Because some colonies were invaded by the social parasite Polistes atrimandibularis, we also tested the effects of social parasites on the nest signature. We observed that, as the season progresses, the nest signature changed; the overall abundance of hydrocarbons as well as the proportion of longer-chain and branched hydrocarbons increased. Where present, social parasites altered the host-nest signature qualitatively (adding parasite-specific alkenes) and quantitatively (by interfering with the increase in overall hydrocarbon abundance). Our results show that 1) colony odor is highly dynamic both in colonies controlled by legitimate foundresses and in those controlled by social parasites; 2) emerged offspring contribute little to colony signature, if at all, in comparison to foundresses; and 3) social parasites, that later mimic host signature, initially mark host nests with species-specific hydrocarbons. This study implies that important updating of the neural template used in nestmate recognition should occur in social insects.
[Mh] Termos MeSH primário: Espécies Introduzidas
Comportamento de Nidação
Comportamento Social
Vespas/fisiologia
Vespas/parasitologia
[Mh] Termos MeSH secundário: Animais
Cromatografia Gasosa
Hidrocarbonetos/análise
Parasitos/fisiologia
Análise de Componente Principal
Estações do Ano
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hydrocarbons)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180108
[Lr] Data última revisão:
180108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171221
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190018


  8 / 9867 MEDLINE  
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[PMID]:29220020
[Au] Autor:Sarria S; Kruyer NS; Peralta-Yahya P
[Ad] Endereço:School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, USA.
[Ti] Título:Microbial synthesis of medium-chain chemicals from renewables.
[So] Source:Nat Biotechnol;35(12):1158-1166, 2017 Dec.
[Is] ISSN:1546-1696
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Linear, medium-chain (C8-C12) hydrocarbons are important components of fuels as well as commodity and specialty chemicals. As industrial microbes do not contain pathways to produce medium-chain chemicals, approaches such as overexpression of endogenous enzymes or deletion of competing pathways are not available to the metabolic engineer; instead, fatty acid synthesis and reversed ß-oxidation are manipulated to synthesize medium-chain chemical precursors. Even so, chain lengths remain difficult to control, which means that purification must be used to obtain the desired products, titers of which are typically low and rarely exceed milligrams per liter. By engineering the substrate specificity and activity of the pathway enzymes that generate the fatty acyl intermediates and chain-tailoring enzymes, researchers can boost the type and yield of medium-chain chemicals. Development of technologies to both manipulate chain-tailoring enzymes and to assay for products promises to enable the generation of g/L yields of medium-chain chemicals.
[Mh] Termos MeSH primário: Biocombustíveis
Biomassa
Ácidos Graxos/metabolismo
Hidrocarbonetos/metabolismo
Engenharia Metabólica/métodos
[Mh] Termos MeSH secundário: Escherichia coli
Lignina
Saccharomyces cerevisiae
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Biofuels); 0 (Fatty Acids); 0 (Hydrocarbons); 11132-73-3 (lignocellulose); 9005-53-2 (Lignin)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171220
[Lr] Data última revisão:
171220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171209
[St] Status:MEDLINE
[do] DOI:10.1038/nbt.4022


  9 / 9867 MEDLINE  
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[PMID]:28744733
[Au] Autor:Parmentier T; Dekoninck W; Wenseleers T
[Ad] Endereço:Laboratory of Socioecology and Socioevolution, KU Leuven, Naamsestraat 59, B-3000, Leuven, Belgium. Thomas.Parmentier@kuleuven.be.
[Ti] Título:Arthropods Associate with their Red Wood ant Host without Matching Nestmate Recognition Cues.
[So] Source:J Chem Ecol;43(7):644-661, 2017 Jul.
[Is] ISSN:1573-1561
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Social insect colonies provide a valuable resource that attracts and offers shelter to a large community of arthropods. Previous research has suggested that many specialist parasites of social insects chemically mimic their host in order to evade aggression. In the present study, we carry out a systematic study to test how common such chemical deception is across a group of 22 arthropods that are associated with red wood ants (Formica rufa group). In contrast to the examples of chemical mimicry documented in some highly specialized parasites in previous studies, we find that most of the rather unspecialized red wood ant associates surveyed did not use mimicry of the cuticular hydrocarbon recognition cues to evade host detection. Instead, we found that myrmecophiles with lower cuticular hydrocarbon concentrations provoked less host aggression. Therefore, some myrmecophiles with low hydrocarbon concentrations appear to evade host detection via a strategy known as chemical insignificance. Others showed no chemical disguise at all and, instead, relied on behavioral adaptations such as particular defense or evasion tactics, in order to evade host aggression. Overall, this study indicates that unspecialized myrmecophiles do not require the matching of host recognition cues and advanced strategies of chemical mimicry, but can integrate in a hostile ant nest via either chemical insignificance or specific behavioral adaptations.
[Mh] Termos MeSH primário: Formigas/parasitologia
Artrópodes/fisiologia
[Mh] Termos MeSH secundário: Agressão
Animais
Formigas/fisiologia
Comportamento Animal
Mimetismo Biológico
Feminino
Interações Hospedeiro-Parasita
Hidrocarbonetos/análise
Hidrocarbonetos/metabolismo
Masculino
Comportamento de Nidação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hydrocarbons)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171218
[Lr] Data última revisão:
171218
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170727
[St] Status:MEDLINE
[do] DOI:10.1007/s10886-017-0868-2


  10 / 9867 MEDLINE  
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[PMID]:29036222
[Au] Autor:Bauersachs T; Talbot HM; Sidgwick F; Sivonen K; Schwark L
[Ad] Endereço:Department of Organic Geochemistry, Christian-Albrechts-University, Kiel, Germany.
[Ti] Título:Lipid biomarker signatures as tracers for harmful cyanobacterial blooms in the Baltic Sea.
[So] Source:PLoS One;12(10):e0186360, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The recent proliferation of harmful cyanobacterial blooms (cyanoHABs) in the Baltic and other marginal seas poses a severe threat for the health of infested ecosystems as e.g. the massive export and decay of cyanobacterial biomass facilitates the spread of bottom water hypoxia. There is evidence that cyanoHABs occurred repeatedly in the Baltic Sea but knowledge of their spatiotemporal distribution and the cyanobacteria that contributed to them is limited. In this study, we examined representatives of the major bloom-forming heterocystous cyanobacteria (i.e. Aphanizomenon, Dolichospermum (formerly Anabaena) and Nodularia) to establish lipid fingerprints that allow tracking these environmentally important diazotrophs in the modern and past Baltic Sea. The distribution of normal and mid-chain branched alkanes, fatty acid methyl esters, bacteriohopanepolyols and heterocyst glycolipids permitted a clear chemotaxonomic separation of the different heterocystous cyanobacteria but also indicated a close phylogenetic relationship between representatives of the genera Aphanizomenon and Dolichospermum. Compared to the discontinuous nature of phytoplankton surveys studies, the distinct lipid profiles reported here will allow obtaining detailed spatiotemporal information on the frequency and intensity of Baltic Sea cyanoHABs as well as their community composition using the time-integrated biomarker signatures recorded in surface and subsurface sediments. As heterocystous cyanobacteria of the genera Aphanizomenon, Dolichospermum and Nodularia are generally known to form massive blooms in many brackish as well as lacustrine systems worldwide, the chemotaxonomic markers introduced in this study may allow investigating cyanoHABs in a great variety of contemporary environments from polar to tropical latitudes.
[Mh] Termos MeSH primário: Cianobactérias/metabolismo
Metabolismo dos Lipídeos
Oceanos e Mares
[Mh] Termos MeSH secundário: Biodiversidade
Biomarcadores/química
Biomarcadores/metabolismo
Cianobactérias/classificação
Cianobactérias/fisiologia
Ácidos Graxos/química
Ácidos Graxos/metabolismo
Glicolipídeos/metabolismo
Hidrocarbonetos/química
Hidrocarbonetos/metabolismo
Fixação de Nitrogênio
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biomarkers); 0 (Fatty Acids); 0 (Glycolipids); 0 (Hydrocarbons)
[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:171017
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0186360



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