Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 17
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
03SRC779 eCrystals
Smith, Paul D.; Horton, Peter N.; Hursthouse, Michael B..
Tipo: Crystal Structure Data Holding Palavras-chave: C~24~H~28~F~6~N~5~Ni~2~O~3~PS~2~; Organometallic; Nickel; Chelates.
Ano: 2003 URL: http://ecrystals.chem.soton.ac.uk/904/
Imagem não selecionada

Imprime registro no formato completo
04SRC038 eCrystals
Smith, Paul D.; Coles, Simon J.; Hursthouse, Michael B..
Tipo: Crystal Structure Data Holding Palavras-chave: C~24~H~29~N~5~NiO~3~S~2~; Organometallic; Nickel; Chelates.
Ano: 2004 URL: http://ecrystals.chem.soton.ac.uk/905/
Imagem não selecionada

Imprime registro no formato completo
Avaliação da presença de metais pesados em nove méis produzidos e comercializados no Distrito Federal. Repositório Alice
ROSA-CAMPOS, A. A.; ROCHA, J. E. da S.; BORGO, L. A.; SILVA, M. S. da..
Resumo: O mel brasileiro é produzido principalmente por abelhas africanizadas a partir do néctar ou da secreção das plantas e, devido às suas características genéticas dessas espécies de abelhas, dispensa o uso de antibióticos e pesticidas, como acaricidas e fungicidas. A composição das amostras de méis está intimamente relacionada com o tipo de florada utilizada por estas abelhas para a elaboração do produto final. Um dos componentes de grande importância são os minerais presentes no mel que representam de 0,02% a 1%. Dentre estes minerais observamos os chamados metais pesados, que podem indicar tanto a origem geográfica do mel quanto o nível de poluição ambiental por estes metais. Logo, faz-se necessário a pesquisa da presença ou não de metais pesados...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Abelha; Mel; Metal pesado; Chumbo; Cobre; Cromo; Níquel; Zinco; Honey bees; Honey; Heavy metals; Lead; Copper; Chromium; Nickel; Zinc.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/977384
Imagem não selecionada

Imprime registro no formato completo
Dark septate endophytic fungi increase green manure-15N recovery efficiency, N contents, and micronutrients in rice grains. Repositório Alice
VERGARA, C.; ARAUJO, K. E. C.; URQUIAGA, S.; SANTA-CATARINA, C.; SCHULTZ, N.; ARAUJO, E. da S.; BALIEIRO, F. de C.; XAVIER, G. R.; ZILLI, J. E..
An understanding of the interaction between rice and dark septate endophytic (DSE) fungi, under green fertilization, may lead to sustainable agricultural practices. Nevertheless, this interaction is still poorly understood. Therefore, in this study, we aimed to evaluate the accumulation of macro- and micronutrients, dry matter, and protein and N recovery efficiency from Canavalia ensiformis (L.)-15N in rice inoculated with DSE fungi. An experiment under greenhouse conditions was conducted in a randomized complete block design comprising split-plots, with five replicates of rice plants potted in non-sterilized soil. Rice (Piauí variety) seedlings were inoculated with DSE fungi, A101 and A103, or left uninoculated (control) and transplanted into pots...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Dark septate endophytic fungi; DSE fungi; Canavalia Ensiformis; Oryza Sativa; Níquel; Ferro; Manganês; Grão; Arroz; Fungo; Nickel; Iron; Manganese; Grains; Rice; Fungi.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1091716
Imagem não selecionada

Imprime registro no formato completo
Effect of nickel chloride on Arabidopsis genomic DNA and methylation of 18S rDNA Electron. J. Biotechnol.
Li,Zhongai; Chen,Xin; Li,Suoping; Wang,Zicheng.
Background In recent years, nickel (Ni) has been widely applied in industrial and agricultural production and has become a kind of environmental pollution. In this study, the effect of nickel chloride (NiCl2) with different concentrations on Arabidopsis genomic stability and DNA methylation has been demonstrated. The nucleolus variation and 18S rDNA methylation after NiCl2 treatment have been analyzed. Results The results are as follows: (1) The NiCl2 could result in heritable genomic methylation variations. The genomic DNA methylation variations have been detected by methylation-sensitive amplified polymorphism (MSAP) molecular markers, and the result showed that after NiCl2 treatment, there was methylation variation in T0 generation seedlings, and...
Tipo: Journal article Palavras-chave: DNA methylation; Heavy metal; Methylation sensitive amplified polymorphism (MSAP); Nickel.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000100010
Imagem não selecionada

Imprime registro no formato completo
Effects of biosorption parameter: kinetics, isotherm and thermodynamics for Ni(II) biosorption from aqueous solution by Circinella sp. Electron. J. Biotechnol.
Alpat,Senol; Alpat,Sibel Kilinç; Çadirci,Bilge Hilal; Özbayrak,Özge; Yasa,Ihsan.
Circinella sp. was employed as a biosorbent for removal of Ni(II) from aqueous solution. The biosorption kinetics and isotherms were investigated. The effect of several parameters, such as biosorbent dosage, contact time, initial concentration, pH and temperature, on biosorption process was evaluated. The kinetic studies indicated that the biosorption followed pseudo-second order kinetic model. Biosorption behaviour of Ni(II) on Circinella sp. was expressed by both Langmuir and Freundlich isotherms. The equilibrium data fit better to the Langmuir model compared to the Freundlich model in concentration range studied (1.0-3.0 mM). The thermodynamic parameters (ΔG0, ΔH0 and ΔS0) were also determined, and it was found that the Ni(II)...
Tipo: Journal article Palavras-chave: Biosorption; Circinella sp; Equilibrium; Kinetic; Nickel.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500004
Imagem não selecionada

Imprime registro no formato completo
Impact of foliar nickel application on urease activity, antioxidant metabolism and control of powdery mildew (Microsphaera diffusa) in soybean plants. Repositório Alice
BARCELOS, J. P. Q.; REIS, H. P. G.; GODOY, C. V.; GRATÃO, P. L.; FURLANI JUNIOR, E.; PUTTI, F. F.; CAMPOS, M.; REIS, A. R..
bitstream/item/190139/1/Barcelos-p-1502.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Soja; Antioxidante; Fungicida; Uréia; Uréase; Soybeans; Antioxidant activity; Fungicides; Nickel; Urea.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1103447
Imagem não selecionada

Imprime registro no formato completo
Influence of nickel in petroleum biodegradation: a metagenomics approach. Repositório Alice
TAKETANI, N.; TAKETANI, R. G.; MELO, I. S. de; RIZZO, A. C. L.; SORIANO, A. U.; LEITE, S. G. F.; CUNHA, C. D..
2014
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Petróleo; Biodegradação; Niquel; Nickel; Petroleum; Biodegradation.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1010890
Imagem não selecionada

Imprime registro no formato completo
New metal catalysts active for thermal polymerization of vegetable oils. Repositório Alice
MELLO, V. M.; OLIVEIRA, G. V.; MANDARINO, J. M. G.; CARRÃO-PANIZZI, M. C.; SUAREZ, P. A. Z..
2013
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Soybean oil; Nickel; Iron; Printing ink.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/968976
Imagem não selecionada

Imprime registro no formato completo
Nickel and vanadium contamination of benthic invertebrates following the "Erika" wreck ArchiMer
Chiffoleau, Jean-francois; Chauvaud, Laurent; Amouroux, David; Barats, Aurélie; Dufour, Aurélie; Pecheyran, Christophe; Roux, Nathalie.
Levels of nickel and vanadium, trace metals found in high concentration in the oil spilled from the "Erika" tanker off Brittany (France) in December 1999 (41 +/- 1 and 87 +/- 3 mg kg(-1) respectively), have been monitored over a one-year period following this accidental event in several benthic invertebrates. Ni and V in mussels (Mytilus edulis) and oysters (Crassostrea gigas) soft tissues were analysed twice a month by graphite furnace atomic absorption spectrometry and a scallop (Pecten maximus) shell daily growth bands were sampled every three bands by laser ablation and analysed by ICP-MS for these two contaminants. Survey data for mollusc tissues were compared with reference data arising from the national monitoring database. Ni concentrations in...
Tipo: Text Palavras-chave: Monitoring; Scallop shell; Oyster; Mussel; Vanadium; Nickel; Oil spill.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-402.pdf
Imagem não selecionada

Imprime registro no formato completo
Nickel isotope fractionation during laterite Ni ore smelting and refining: implications for tracing the sources of Ni in smelter-affected soils ArchiMer
Ratie, G.; Quantin, C.; Jouvin, D.; Calmels, D.; Ettler, V.; Sivry, Y.; Cruz Vieira, L.; Ponzevera, Emmanuel; Garnier, J..
Nickel isotope ratios were measured in ores, fly ash, slags and FeNi samples from two metallurgical plants located in the Goiás State, Brazil (Barro Alto, Niquelândia). This allowed investigating the mass-dependent fractionation of Ni isotopes during the Ni-laterite ore smelting and refining. Feeding material exhibits a large range of δ60Ni values (from 0.02 ± 0.10 ‰ to 0.20 ± 0.05 ‰, n=7), explained by the diversity of Ni-bearing phases, and the average of δ60Nifeeding materials was found equal to 0.08 ± 0.08‰ (2SD, n=7). Both δ60Ni values of fly ash (δ60Ni = 0.07 ± 0.07‰, n=10) and final FeNi produced (0.05 ± 0.02 ‰, n=2) were not significantly different from the feeding materials ones. These values are consistent with the very high production yield of...
Tipo: Text Palavras-chave: Nickel; Isotope; Smelting; Refining; Source; Soil.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00278/38961/37501.pdf
Imagem não selecionada

Imprime registro no formato completo
Nickel isotope fractionation during tropical weathering of ultramafic rocks ArchiMer
Ratie, G.; Jouvin, D.; Garnier, Julien; Rouxel, Olivier; Miska, S.; Guimaraes, E.; Cruz Vieira, L.; Sivry, Y.; Zelano, I.; Montarges-pelletier, E.; Thil, F.; Quantin, C..
Although Ni isotopes have been shown to be significantly fractionated in terrestrial samples, their use in continental environmental studies has not yet been evaluated. The present study focuses on an ultramafic (UM) massif (Barro Alto, Goias, Brazil) because such areas are naturally rich in Ni. We present developed lateritic weathering profiles. The goal of the study is to evaluate the potential of using Ni isotopes in environmental continental studies by combining its isotopic signature with mineralogy, in order to better understand the geochemical cycling of Ni in UM settings during weathering. As such, Ni isotope values were measured in samples from the Barro Alto UM complex in the main stages of the lateritic weathering profile of UM rocks, including...
Tipo: Text Palavras-chave: Nickel; Isotope; Weathering; Mineralogy; Soil.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00254/36553/35098.pdf
Imagem não selecionada

Imprime registro no formato completo
Nickel Isotope Variations in Terrestrial Silicate Rocks and Geological Reference Materials Measured by MC-ICP-MS ArchiMer
Gueguen, Bleuenn; Rouxel, Olivier; Ponzevera, Emmanuel; Bekker, Andrey; Fouquet, Yves.
Although initial studies have demonstrated the applicability of Ni isotopes for cosmochemistry and as a potential biosignature, the Ni isotope composition of terrestrial igneous and sedimentary rocks, and ore deposits remains poorly known. Our contribution is fourfold: (a) to detail an analytical procedure for Ni isotope determination, (b) to determine the Ni isotope composition of various geological reference materials, (c) to assess the isotope composition of the Bulk Silicate Earth relative to the Ni isotope reference material NIST SRM 986 and (d) to report the range of mass-dependent Ni isotope fractionations in magmatic rocks and ore deposits. After purification through a two-stage chromatography procedure, Ni isotope ratios were measured by MC-ICP-MS...
Tipo: Text Palavras-chave: Nickel; Stable isotopes; MC-ICP-MS; Geological reference materials; Bulk Silicate Earth; Abiotic fractionation.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00159/27069/25332.pdf
Imagem não selecionada

Imprime registro no formato completo
Physiological response to Nickel in bacteria isolated from Cerrado serpentine soil. Repositório Alice
COSTA, F. S.; COSTA, R. A. da; PESSOA-FILHO, M. A. C. de P.; BARRETO, C. C..
2015
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Solos serpentinos; Tolerância à metais pesados; Niquel; Solo; Resistência genética; Cerrado; Nickel; Serpentine soils; Genetic resistence; Metal tolerance; Actinobacteria; Savannas; Brazil.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1036917
Imagem não selecionada

Imprime registro no formato completo
The behavior of nickel isotopes at the biogeochemical interface between ultramafic soils and Ni accumulator species ArchiMer
Ratie, G.; Quantin, C.; Maia De Freitas, A.; Echevarria, G.; Ponzevera, Emmanuel; Garnier, J..
Ultramafic derived soils are characterized by low nutrient soils, a low Ca:Mg ratio, and high metal contents such as Ni, Co and Cr. The vegetation growing on these soils is highly adapted and includes both Ni hyperaccumulator and accumulator species. Today, approximately 530 Ni hyperaccumulator species are listed worldwide and the Ni concentration can be extremely high, e.g. up to 25% in latex from Pycnandra acuminata (Sapotaceae), a tree found in New Caledonia. The aim of this study is to identify the potential role of Ni hyperaccumulator plants in the Ni biogeochemical cycle at the soil surface by using Ni isotopes. A set of Ni hyperaccumulator and Ni accumulator plants as well as topsoils were sampled on the Barro Alto and Niquelândia ultramafic...
Tipo: Text Palavras-chave: Nickel; Isotope; Ni hyperaccumulator species; Ultramafic environment.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00464/57565/59740.pdf
Imagem não selecionada

Imprime registro no formato completo
Tolerance and stress response of Macrolepiota procera to nickel IPB - Escola Superior Agrária
Baptista, Paula; Ferreira, Sílvia; Soares, Maria Elisa; Coelho, Valentim; Bastos, Maria de Lourdes.
Nickel (Ni) is an essential element for many organisms; however, it is very toxic at high concentrations and also depending on the species. In macrofungi the mechanisms underlying their Ni tolerance are poorly documented. This study examines, for the first time, the participation of the antioxidative system in Macrolepiota procera exposed to different Ni2+ concentrations and their relation with Ni tolerance. The effect of the pH on Ni tolerance was also evaluated. The fungus was cultivated on solid medium with different NiCl2 concentrations (0.05, 0.2, 0.8 mM) at pH 4, 6, and 8, and fungi growth and Ni uptake were determined. The antioxidative enzymes catalase (CAT) and superoxide dismutase (SOD) and the production of hydrogen peroxide (H2O2) were...
Tipo: Article Palavras-chave: Macrolepiota procera; Nickel; Stress; Ni2+ tolerance; Ni2+ accumulation; Hydrogen peroxide; Antioxidant enzymes.
Ano: 2009 URL: http://hdl.handle.net/10198/4473
Imagem não selecionada

Imprime registro no formato completo
Tolerance and stress response of the saprobe macrofungi Macrolepiota procera to nickel IPB - Escola Superior Agrária
Baptista, Paula; Ferreira, Sílvia; Soares, Maria Elisa; Bastos, Maria de Lourdes.
Nickel (Ni) is an essential element for many organisms however it is very toxic at high concentrations and also depending on the species. In macrofungi the mechanisms underlying their Ni-tolerance are poorly documented. We examined, for the first time, the participation of the antioxidative system in the Macrolepiota procera exposed to different Ni2+ concentrations and their relation with Ni-tolerance. The effect of the pH on Ni-tolerance was also evaluated. The fungus was cultivated on solid medium with different Ni concentrations (0.05, 0.2, 0.8 mM) at pH 4, 6 and 8, and fungi growth and Ni uptake was determined. The antioxidative enzymes, catalase (CAT) and superoxide dismutase (SOD) and the production of hydrogen peroxide (H2O2) were evaluated on...
Tipo: ConferenceObject Palavras-chave: Macrolepiota procera; Nickel; Stress; Ni-tolerance; Ni-accumulation; Hydrogen peroxide; Antioxidant enzymes.
Ano: 2009 URL: http://hdl.handle.net/10198/4488
Registros recuperados: 17
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional