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Registros recuperados: 26
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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/
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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/
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Antioxidant isoenzyme responses to nickel-induced stress in tobacco cell suspension culture Scientia Agricola
Pompeu,Georgia Bertoni; Gratão,Priscila Lupino; Vitorello,Victor Alexandre; Azevedo,Ricardo Antunes.
Exposure to nickel (Ni) at high concentrations can lead to production of reactive oxygen species (ROS) resulting in oxidative damage at the cellular level. We investigated the antioxidative responses of Nicotiana tabacum cv BY-2 cell suspension to Ni stress (0.075 and 0.75 mM NiCl2) over a 72 h period with special attention to potential alterations in isoenzymes of superoxide dismutase (SOD), catalase (CAT) and glutathione reductase (GR). Two main SOD isoenzymes were observed, a Mn-SOD (band I) and a Fe-SOD (band II), as well as one CAT isoenzyme and four GR isoenzymes. Activity staining analysis revealed that CAT activity plays a major role in the early response to Ni-induced oxidative stress, particularly when the Ni concentration used was low, whilst a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant enzymes; Catalase; Nickel; Superoxide dismutase.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000500015
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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
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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
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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
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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
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Effects of nickel on the mineral composition of Fleischmann’s yeast (Saccharomyces cerevisiae) Ciênc. Tecnol. Aliment.
Mariano-da-Silva,Samuel; Brait,Joys Dias de Assis; Angeloni,Luiz Henrique Poleto; Mariano-da-Silva,Fabiana Maria de Siqueira; Leite,César Augusto Oliveira; Braga,Paula.
Sugar cane juice containing 12% (w.w -1) of total reducing sugars and 0.0 to 5.0 mmol of nickel L-1, with pH ranging from 3.5 to 6.5, was inoculated with Fleischmann’s yeast (Saccharomyces cerevisiae) (10% w.w -1). Six hours after fermentation, the yeast’s cellular viability and trehalose content were evaluated. The resulting must was centrifuged and the raw yeast was analyzed by atomic absorption spectroscopy to evaluate the intracellular levels of calcium, copper, iron, magnesium, manganese, nickel, phosphorus, potassium, sulfur and zinc. The intracellular levels of iron, magnesium and calcium were affected and the yeast’s susceptibility to nickel was enhanced by the decrease in pH. The yeast’s growth was not affected by nickel at high pH, but the toxic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nickel; Mineral composition; Saccharomyces cerevisiae; Yeast.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612007000300013
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Evaluation of nickel content in Ni-Mg-Al mixed oxides in steam reforming of simulated biogas. Infoteca-e
CORREIA, F. H.; CURADO, I. C.; GHESTI, G. F.; BRAGA, P. R. S.; MARINHO, A. L. A.; MATTOS, L. V.; NORONHA, F. B.; SOARES, I. P.; SCHULTZ, E. L..
Ni-Mg-Al mixed oxides derived from hydrotalcite-like compounds were prepared by a co-precipitation technique, calcined at two temperatures (550 °C and 750 °C) and applied to steam reforming of simulated biogas. Three nickel contents were used in the catalysts (5, 10 and 15%). The catalysts were characterized by X ray fluorescence, N2 sorption techniques, X-ray diffraction and temperature-programmed desorption of CO2. Steam reforming experiments using simulated biogas were carried out at atmospheric pressure and 750 °C, using S/C ratio of 3.2. Catalysts calcined at 750 °C showed nickel and magnesium aluminate phases, resulting in lower density of basic sites. Conversion of CH4 ranged from 97.4 to 99.6% while CO2 conversion ranged from 58.5 to 63.5%. The...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Steam reforming; Mixed oxides; Biogás; Níquel; Oxido; Steam; Nickel; Catalysts; Oxides.
Ano: 2020 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1124168
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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
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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
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Interactive effects between supplemental ultraviolet-B radiation and heavy metals on the growth and biochemical characteristics of Spinacia oleracea L. Braz. J. Plant Physiol.
Shweta,Mishra; Agrawal,S.B..
The impact of supplemental UV-B (sUV-B) radiation and heavy metals: Cd (68 µmol.kg-1 soil) and Ni (68 µmol.kg-1 soil) singly and in combination was studied on photosynthetic and non-photosynthetic pigments, metabolites, enzyme activities, biomass accumulation and the net primary productivity of spinach (Spinacia oleracea L. var. All Green), a common leafy vegetable plant. Both the stresses individually and in combination resulted in the reduction of photosynthetic pigments, ascorbic acid, and catalase activity, whereas a reverse trend was observed for anthocyanin, flavonoids and proline content, lipid peroxidation and peroxidase activity. The interactive effects of both the stresses were, however, less than additive. Combined treatment of sUV-B + Cd was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spinaicia oleracea; Biomass; Cadmium; Enzymes; Nickel; Pigments; Ultraviolet-B.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200007
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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
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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
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Nickel biosorption by Acinetobacter baumannii and Pseudomonas aeruginosa isolated from industrial wastewater BJM
Rodríguez,Carlos E.; Quesada,Adolfo.
Nickel biosorption ability was evaluated in two bacterial strains: Acinetobacter baumannii UCR-2971 and Pseudomonas aeruginosa UCR-2957, resulting in greatest adsorption at pH 4.5 and a residence time of 100 minutes. Biosorption isotherms showed that the process follows the Langmuir model. The maximum adsorption rates (Nmax) were 8.8 and 5.7 mg·g-1 for A. baumannii and P. aeruginosa, respectively; however, affinity constants suggest that P. aeruginosa (K=1.28) has higher affinity for nickel than A. baumannii (K=0.68). It is suggested that both strains could be used for wastewater treatment, as long as the concentration of Ni2+ is within the range of mg·L-1.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosorption; Nickel; Acinetobacter baumannii; Pseudomonas aeruginosa; Wastewater treatment.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400012
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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
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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: https://archimer.ifremer.fr/doc/00254/36553/35098.pdf
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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
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Nickelophilous plants and their significance in phytotechnologies Braz. J. Plant Physiol.
Prasad,Majeti Narasimha Vara.
Nickeliferous soils are invaded predominantly by members of the Brassicaceae, Cyperaceae, Cunoniaceae, Caryophyllaceae, Fabaceae, Flacourtiaceae, Euphorbiaceous, Lamiaceae, Poaceae and Violaceae, and many of these plants are metal tolerant. About 300 Ni hyperaccumulating plants been identified. These members exhibit unusual appetite for toxic metals and elemental defense. Hyperaccumulators provide protection against fungal and insect attack. Investigations suggested that Ni-hyperaccumulation has a protective function against fungal and bacterial pathogens in Streptanthus polygaloides and Thlaspi montanum. Significance of nickelophilous plants and their significance in phytotechnologies are discussed in this paper.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metal; Hyperaccumulators; Nickel; Phytomanagement; Tolerance.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000100010
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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
Registros recuperados: 26
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