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Registros recuperados: 102
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A base do controle da ferrugem do cafeeiro. Infoteca-e
YNAMA, R.; PRIMAVESI, O..
Macro-nutrientes; Micro-nutrientes; Material orgânico; Ferrugem do cafeerio.
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Produção de café; Production.; Café; Fertilidade do Solo; Solo.; Coffea; Fertilizers; Trace elements; Soil..
Ano: 1973 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/43242
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A microbiological and biogeochemical investigation of the cold seep tubeworm Escarpia southwardae (Annelida: Siboglinidae): Symbiosis and trace element composition of the tube ArchiMer
Duperron, Sebastien; Gaudron, Sylvie M.; Lemaitre, Nolwenn; Bayon, Germain.
Tubeworms within the annelid family Siboglinidae rely on sulfur-oxidizing autotrophic bacterial symbionts for their nutrition, and are among the dominant metazoans occurring at deep-sea hydrocarbon seeps. Contrary to their relatives from hydrothermal vents, sulfide uptake for symbionts occurs within the anoxic subsurface sediment, in the posterior ‘root’ region of the animal. This study reports on an integrated microbiological and geochemical investigation of the cold seep tubeworm Escarpia southwardae collected at the Regab pockmark (Gulf of Guinea). Our aim was to further constrain the links between the animal and its symbiotic bacteria, and their environment. We show that E. southwardae harbors abundant sulfur-oxidizing bacterial symbionts in its...
Tipo: Text Palavras-chave: Sulfur-oxidizing bacteria; RTCA; Trace elements; RubisCO; Symbiosis.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00191/30251/28683.pdf
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A new contribution to the Late Quaternary tephrostratigraphy of the Mediterranean: Aegean Sea core LC21 ArchiMer
Satow, C.; Tomlinson, E. L.; Grant, K. M.; Albert, P. G.; Smith, V. C.; Manning, C. J.; Ottolini, L.; Wulf, S.; Rohling, E. J.; Lowe, J. J.; Blockley, S. P. E.; Menzies, M. A..
Tephra layers preserved in marine sediments can contribute to the reconstruction of volcanic histories and potentially act as stratigraphic isochrons to link together environmental records. Recent developments in the detection of volcanic ash (tephra) at levels where none is macroscopically visible (so-called ‘crypto-tephra’) have greatly enhanced the potential of tephrostratigraphy for synchronising environmental and archaeological records by expanding the areas over which tephras are found. In this paper, crypto-tephra extraction techniques allow the recovery of 8 non-visible tephra layers to add to the 9 visible layers in a marine sediment core (LC21) from the SE Aegean Sea to form the longest, single core record of volcanic activity in the Aegean Sea....
Tipo: Text Palavras-chave: Tephra; Trace elements; Santorini; Campanian Ignimbrite; Pantelleria; Kos; Yali; Aegean sea; Mediterranean.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00294/40498/39433.pdf
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Abrupt changes of temperature and water chemistry in the late Pleistocene and early Holocene Black Sea ArchiMer
Bahr, Andre; Lamy, Frank; Arz, Helge W.; Major, Candace; Kwiecien, Olga; Wefer, Gerold.
[1] New Mg/Ca, Sr/Ca, and published stable oxygen isotope and Sr-87/(86) Sr data obtained on ostracods from gravity cores located on the northwestern Black Sea slope were used to infer changes in the Black Sea hydrology and water chemistry for the period between 30 to 8 ka B. P. ( calibrated radiocarbon years). The period prior to 16.5 ka B. P. was characterized by stable conditions in all records until a distinct drop in delta O-18 values combined with a sharp increase in Sr-87/(86) Sr occurred between 16.5 and 14.8 ka B. P. This event is attributed to an increased runoff from the northern drainage area of the Black Sea between Heinrich Event 1 and the onset of the Bolling warm period. While the Mg/Ca and Sr/Ca records remained rather unaffected by this...
Tipo: Text Palavras-chave: Black Sea; Ostracods; Trace elements.
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00209/31989/30432.pdf
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Absorção e extração de alguns nutrientes pela cultivar 'guajarina' de pimenta-do-reino. Repositório Alice
VELOSO, C. A. C.; CARVALHO, E. J. M..
Tipo: Artigo de periódico Palavras-chave: Pimenta-do-reino; Macroelement; Guajarina.; Absorção de Nutrientes; Piper Nigrum; Variedade.; Nutrient uptake; Trace elements; Varieties..
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/400409
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Accumulation of nine metals and one metalloid in the tropical scallop Comptopallium radula from coral reefs in New Caledonia ArchiMer
Metian, M.; Bustamante, Paco; Hedouin, L.; Warnau, M..
Uptake of waterborne Cd, Co, Mn and Zn was determined in laboratory experiments using radiotracer techniques (Cd-109, Co-57, Mn-54 and Zn-65). Labelled Zn was mainly accumulated in the digestive gland (65%) and Co in kidneys (81%); Cd and Mn were similarly distributed in digestive gland and gills. In a complementary field study, Ag, As, Cd, Co, Cr, Cu, Fe, Mn, Ni, and Zn were analysed in scallops collected at two stations showing different contamination levels. Digestive gland and kidneys displayed the highest concentrations. Ag, As, Cd, and Fe differed in soft tissues from the two stations, suggesting that Comptopallium radula could be a valuable local biomonitor species for these elements. Low Mn and Zn concentrations found in kidneys suggest that their...
Tipo: Text Palavras-chave: Bioindicator species; Risk assessment; Pectinidae; Radiotracers; Arsenic; Trace elements; Tropical environment.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6953.pdf
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Adubação foliar da soja: II. Efeitos de NPK e micronutrientes em função do preparo do solo. Repositório Alice
ROSOLEM, C. A.; SILVERIO, J. C. O.; PRIMAVESI, O..
Este trabalho teve por objetivo estudar os efeitos de adubos foliares com e sem micronutrientes, aplicados nas sementes, sobre a produção de soja.
Tipo: Separatas Palavras-chave: Micronutrientes; Sementes.; Solo.; Trace elements; Seeds; Soil..
Ano: 1982 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/42288
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Aérosols côtiers dans le nord de la Manche ArchiMer
Flament, P; Lepretre, A; Noel, S; Auger, Y.
Dix-huit prélèvements d'aérosols ont été effectués en Manche Nord, soit en bordure de mer, soit à quelques milles au large, à l'aide d'un impacteur à cascade (5 étages). L'ensemble des données (concentrations de 8 éléments répartis en 6 classes granulométriques successives) est exploité par analyse factorielle des correspondances. Celle-ci permet de mettre en évidence de larges déformations dans les spectres granulométriques pour les éléments traceurs marin et terrestre (Na et Al). En opposition, les métaux résultant d'activité anthropique (Fe, Pb, Zn, Mn), ont des comportements beaucoup plus typés. Parmi ceux-ci, la présence du manganèse sur le site paraît être indépendante de celle des autres métaux et imputable à une seule source. Pb, Fe, Zn et cuivre...
Tipo: Text Palavras-chave: Aérosols; Éléments-traces; Analyse par correspondance; Distribution granulométrique; Littoral; Aerosols; Trace elements; Correspondence analysis; Size distribution; Coastal.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/00110/22082/19723.pdf
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Assessing the Content of Micronutrients in Soils and Sugarcane in Different Pedogeological Contexts of Northeastern Brazil Rev. Bras. Ciênc. Solo
Silva,Rita de Cássia Ferreira da; Silva,Fernando Bruno Vieira da; Biondi,Caroline Miranda; Nascimento,Clístenes Williams Araújo do; Oliveira,Emídio Cantídio Almeida de.
ABSTRACT Micronutrient research for sugarcane in northeastern Brazil is scarce and most works on this issue date back to the 70’s and 80’s. The objectives of this study were to assess the available and reserve pools of Fe, Mn, Cu, and Zn in soils cultivated with sugarcane under three geological contexts in northeastern Brazil as well as to diagnose the micronutrient nutritional status of sugarcane grown on these areas in order to identify pedogeological conditions in which micronutrient deficiencies are likely. Results showed that the soils cultivated with sugarcane in the states of Paraíba and Pernambuco posed available and reserve contents of micronutrients related to the parent materials and soil textural classes. The reserve contents of Fe, Mn, Zn, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil fertility; Trace elements; Plant nutrition; Critical levels.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100522
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Assessment of antioxidants status and superoxide dismutase activity in HIV-infected children BJID
Pugliese,Camila; Patin,Rose Vega; Palchetti,Cecilia Zanin; Claudio,Cristiane Chiantelli; Gouvêa,Aída de Fátima Thomé Barbosa; Succi,Regina Célia de Menezes; Amancio,Olga Maria Silverio; Cozzolino,Silvia Maria Franciscato; Oliveira,Fernanda Luisa Ceragioli.
Objective:This study aims to assess the nutritional status of selenium, copper and zinc; and also the erythrocyte superoxide dismutase activity of HIV-infected children compared to a control group.Methods:A cross-sectional study was carried out with prepubertal HIV-infected children (n = 51) and their healthy siblings (n = 32). All biochemical measurements including plasma selenium, serum copper levels, serum and erythrocyte zinc levels and erythrocyte super-oxide dismutase activity were evaluated according to dietary, clinical and biochemical parameters.Results:Compared to the control group, the HIV-infected children had lower z-score values for height-for-age (p = 0.0006), higher prevalence of stunting (11.8%) (p = 0.047), lower selenium levels (p =...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidants; HIV and nutrition; Oxidative stress; Trace elements.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000500481
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Assessment of heavy metal residues in Brazilian poultry and swine tissue Arq. Bras. Med. Vet. Zootec.
Alkmim Filho,J. F.; Germano,A.; Dibai,W.L.S.; Vargas,E.A.; Melo,M.M..
The aim of this study was to investigate the presence of arsenic, lead and cadmium residues in samples of liver, kidney and muscle of poultry and swine during the years from 2002 to 2008. A total of 1978 samples were analyzed: 1031 of poultry and 947 of swine from Brazilian slaughterhouses. The samples were analyzed at the National Agricultural Laboratory using the atomic absorption spectrometry technique. In poultry, the arsenic residues were detected in 53.6% of liver samples, although no results have exceeded the MRL. In kidneys, 39.7% of the samples showed measurable residues and there was no violation of the limits. Regarding lead, there were 5 contaminated liver samples and 24 contaminated kidney samples (1.5 and 3.6% respectively). In muscle tissue...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Trace elements; Arsenic; Cadmium; Lead.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000200022
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Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity ArchiMer
Huang, Enqing.
This thesis aims to investigate variations of the last glacial and deglacial Atlantic Ocean circulation, with emphasize on the Atlantic deepwater ventilation rate during the Last Glacial Maximum (LGM). The highlights of the thesis are as the followings: (1) the modern frontal zone between the North Atlantic and the South Atlantic central waters off NW Africa shifted to the south during the last glacial and deglacial time periods. (2) The radiocarbon-based circulation age of the deep Atlantic (> 1500 m) was estimated to be less than 400 years during the LGM, which was equal to or less than its pre-bomb value. Therefore, the LGM deep Atlantic was inferred to be well ventilated. (3) The abyssal Atlantic (below 2500 m) prior to the LGM was more depleted in...
Tipo: Text Palavras-chave: Climate change; Ocean circulation; Atlantic Ocean; Glacial; Deglacial; Thermocline; Radiocarbon; Global carbon cycle; Foraminifera; Carbonate; Trace elements; Deep ocean ventilation rates.
Ano: 2013 URL: https://archimer.ifremer.fr/doc/00493/60446/63891.pdf
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Background and Reference Values of Metals in Soils from Paraíba State, Brazil Rev. Bras. Ciênc. Solo
Almeida Júnior,Agenor Bezerra de; Nascimento,Clístenes Williams Araújo do; Biondi,Caroline Miranda; Souza,Adailson Pereira de; Barros,Felipe Martins do Rêgo.
ABSTRACT Soil contamination by heavy metals threatens ecosystems and human health. Environmental monitoring bodies need reference values for these contaminants to assess the impacts of anthropogenic activities on soil contamination. Quality reference values (QRVs) reflect the natural concentrations of heavy metals in soils without anthropic interference and must be regionally established. The aim of this study was to determine the natural concentrations and quality reference values for the metals Ag, Ba, Cd, Co, Cu, Cr, Mo, Ni, Pb, Sb and Zn in soils of Paraíba state, Brazil. Soil samples were collected from 94 locations across the state in areas of native vegetation or with minimal anthropic interference. The quality reference values (QRVs) were (mg...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Geochemistry; Soil pollution; Micronutrients; Trace elements.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100509
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Biochar in sugar beet production and nutrition Ciência Rural
Zelaya,Katherin Prissila Sevilla; Alves,Barbara Samartini Queiroz; Colen,Fernando; Frazão,Leidivan Almeida; Sampaio,Regynaldo Arruda; Pegoraro,Rodinei Facco; Fernandes,Luiz Arnaldo.
ABSTRACT: The biomass pyrolysis process may be an alternative for the agricultural use of sewage sludge. This study aimed to evaluate the use of of biochars from mixture of sewage sludge and sugarcane bagasse (BB, 1:1 relationship sewage sludge and sugarcane bagasse) on sugar beet (Beta vulgaris L.) production and nutrition. A greenhouse experiment was conducted with five application rates of BB: 0, 2.5, 5, 7.5, and 10% (v/v), and two additional treatments, biochar from sewage sludge (BS, application rate 5% (v/v)) and conventional treatment (CV) that received lime and mineral fertilizer. The treated soils were incubated for 45 days, after which, seedlings were cultivated for 55 days. Biochar produce from sewage sludge and sugarcane bagasse is an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beta vulgaris L.; Trace elements; Pyrolysis; Fine roots..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000500202
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CHROMIUM IN SOIL ORGANIC MATTER AND COWPEA AFTER FOUR CONSECUTIVE ANNUAL APPLICATIONS OF COMPOSTED TANNERY SLUDGE Rev. Bras. Ciênc. Solo
Oliveira,Mara Lucia Jacinto; Araujo,Ademir Sérgio Ferreira de; Melo,Wanderley José de.
Tannery sludge contains high concentrations of inorganic elements, such as chromium (Cr), which may lead to environmental pollution and affect human health The behavior of Cr in organic matter fractions and in the growth of cowpea (Vigna unguiculata L.) was studied in a sandy soil after four consecutive annual applications of composted tannery sludge (CTS). Over a four-year period, CTS was applied on permanent plots (2 × 5 m) and incorporated in the soil (0-20 cm) at the rates of 0, 2.5, 5.0, 10.0, and 20.0 Mg ha-1 (dry weight basis). These treatments were replicated four times in a randomized block design. In the fourth year, cowpea was planted and grown for 50 days, at which time we analyzed the Cr concentrations in the soil, in the fulvic acid, humic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil contamination; Humic substances; Solid residue; Heavy metals; Plant growth; Trace elements.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100297
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Comparative proteomical and metalloproteomical analyses of human plasma from patients with laryngeal cancer. Repositório Alice
GOMES, C. P. C.; FREIRE, M. S.; PIRES, B. R. B.; VASCONCELOS, E. A. R.; ROCHA, T. L.; SA, M. F. G. de; REZENDE, T. M. B.; REIS, A. M. dos; PEREIRA, R. W.; PETRIZ, B. A.; CRUZ, A. D. da; PESCARA, I. C.; FRANCO, O. L..
Tipo: Separatas Palavras-chave: Laryngeal cancer; Human plasma; Immunology; Proteomics; Trace elements.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/869747
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Comportamento termorregulador de cabras Saanen criadas em ambiente tropical suplementadas com selênio orgânico. Repositório Alice
BOMFIM, J. M.; MARTINS, T. P.; PINHEIRO, R. R.; FAÇANHA, D. A. E.; SILVEIRA, R. M. F.; OLIVEIRA, M. C. de; SOUZA, V. de; VASCONCELOS, A. M. de.
Resumo: Objetivou-se, avaliar o comportamento termorregulador de cabras Saanen suplementadas com selênio orgânico na dieta e criadas em ambiente tropical. Foram utilizadas 12 cabras, não prenhes e clinicamente saudáveis; criadas de forma semiextensiva, pela manhã ficavam em pasto nativo e à tarde retornavam para o galpão, permanecendo em baias individuais e recebia concentrado à base de milho e farelo de soja, 250g/animal. Durante 21 dias foram suplementadas com selênio orgânico oferecido na forma de levedura, adicionado ao concentrado de acordo com as recomendações da empresa fornecedora. Foram realizadas aferições a Temperatura Retal, Frequência Respiratória, Temperatura Superficial da pele, nos turnos da manhã e tarde. Os dados meteorológicos foram...
Tipo: Anais e Proceedings de eventos Palavras-chave: Raça Saanen; Semiárido; Brasil; Nordeste; Supplementary feeding.; Mineral supplements; Antioxidade; Caprino; Cabra leiteira; Termorregulação; Nutrição animal; Suplemento alimentar; Suplemento mineral; Microelemento; Selênio.; Goats; Thermoregulation; Trace elements; Selenium; Antioxidants; Semiarid zones; Brazil..
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059793
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Comportement chimique et geochimique des elements a l'état de traces dans l'estuaire de la Seine: Synthese des discussions ArchiMer
Guegueniat, P.
In the synthesis of discussions about the chemistry of the Seine Bay, the author after a note on natural references for metal concentrations, speaks about fluorides, nutrients, PCB, and metallic elements. In conclusion some suggestions about pollutants transfer towards ecosystems link, are enumerated.
Tipo: Text Palavras-chave: PCB; Fluorides; Chemical pollution; Trace metals; Food webs; Bioaccumulation; Biogeochemical cycle; Trace elements.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1303.pdf
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Comportement chimique et geochimique des elements a l'état de traces dans l''estuaire de la Seine: Une synthese des resultats ArchiMer
Guegueniat, P.
Five topics are developed in this synthesis: (1) multi elements analysis in geochemistry; (2) iron geochemical behavior; (3) complexing properties of waters; (4) copper behavior in estuarine waters; (5) impact of sediment dynamics on dissolved metals concentration.
Tipo: Text Palavras-chave: Geographical distribution; Radiochemistry; Brackishwater pollution; Sediment dynamics; Dissolved chemicals; Heavy metals; Geochemistry; Physicochemical properties; Trace elements.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1290.pdf
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Composição mineral da fração folha na serrapilheira produzida em áreas pastoris de Caatinga. Repositório Alice
ALVES, M. M. de A.; CAVALCANTE, A. C. R.; MOURÃO, A. E. B.; VASCONCELOS, J. M. G.; OLIVEIRA, L. B. de.
Resumo: A serrapilheira é uma das principais fontes de nutrientes para ecossistemas pastoris em ambiente semiárido. Objetivou-se quantificar a composição mineral das folhas da serrapilheira produzida em áreas de Caatinga manipulada e não manipulada no Sertão Central do Ceará. Foram avaliadas três áreas de Caatinga - Caatinga raleada 1 e 2 e uma área de Caatinga não raleada. O experimento foi conduzido ao longo do ano de 2012, aos 90, 180, 270 e 360 dias após o início da estação chuvosa. Foram amostradas serrapilheira das três áreas. A serrapilheira foi fracionada sendo analisada a fração folha. Foram realizadas análises químicas para determinação dos conteúdos de macronutrientes (Nitrogênio, Fósforo, Potássio, Magnésio, Enxofre e Cálcio) e micronutrientes...
Tipo: Parte de livro Palavras-chave: Serrapilheira; Macronutrientes do solo; Raleamento; Mineral nutrients; Thinning.; Nutriente mineral; Macroelemento; Microelemento; Raleio; Caatinga; Plant litter; Trace elements; Nutrients..
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1036735
Registros recuperados: 102
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