Zinc And Nickel
Mostrando 13-24 de 126 artigos, teses e dissertações.
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13. Poincianella pluviosa as biomonitor of heavy metals in the municipality of Volta Redonda, RJ, Brazil
RESUMO Objetivou-se com o presente estudo determinar a concentração de metais pesados em cascas de árvores da espécie Poincianella pluviosa no município Volta Redonda, Rio de Janeiro. Foram coletadas cascas de oito árvores, com três repetições de cada, nos setores 1 (W), 2 (S), 3 (E) e 4 (N) do centro de Volta Redonda correspondente aos pontos carde
Rev. bras. eng. agríc. ambient.. Publicado em: 2019-01
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14. Electrocatalytic Oxidation Removal of Phenol from Aqueous Solution with Metal Oxides Doped Carbon Aerogel
Metal oxides (manganese oxide, MnO, manganese dioxide, MnO2, copper oxide, CuO, zinc oxide, ZnO and nickel oxide, NiO) doped carbon aerogel (CA) were prepared and used as catalysts in heterogeneous oxidation of phenol from aqueous solution in a three-dimensional (3D) electrode reactor. Textural characterization of metal oxides doped CA showed that the metal
J. Braz. Chem. Soc.. Publicado em: 2018-04
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15. Impact of Ni Substitution on Structural, Electrical and Thermoelectrical Properties of Zinc Alluminium Chromites Synthesized by sol-gel Route and their Photocatalytic Investigation
Nanostructured nickel substituted zinc alluminium chromites (Zn1-xNixAlCrO4, where, x= 0.0, 0.25, 0.50, 0.75, 1.0) were prepared by simple, cost effective, sol-gel autocombustion method. Temperature of phase formation was analyzed by thermogravimetric and differential thermal analysis (TGA/DTA). Crystallographic studies of all the samples show formation of s
Mat. Res.. Publicado em: 17/08/2017
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16. Synthesis and Characterization of a New Unsymmetrical Potentially Pentadentate Schiff Base Ligand and Related Complexes with Manganese(II), Nickel(II), Copper(II), Zinc(II) and Cadmium(II)
New unsymmetric thioether Schiff base amine, 2-(2-aminoethylthio)-N-(thiophene-2-ylmethylene)aniline was prepared by reaction of 2-aminothiophenol with N-(2-bromoethyl)phthalimide and then by thiophene-2-carbaldehyde. Then, the phthalimide group converted to the amine by hydrazine hydrate. The new potentially pentadentate N3S2 donor unsymmetrical Schiff base
J. Braz. Chem. Soc.. Publicado em: 2017-05
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17. Determination of Traces of Ni, Cu, and Zn in Wastewater and Alloy Samples by Flame-AAS after Ionic Liquid-Based Dispersive Liquid Phase Microextraction
A procedure has been developed for simultaneous separation/preconcentration of copper, nickel, and zinc based on in situ ionic liquid-based dispersive liquid-liquid microextraction method as a prior step to their determination by flame atomic absorption spectrometry. The analytes reacted with sodium diethyl dithiocarbamate at pH 7 to form hydrophobic chelate
J. Braz. Chem. Soc.. Publicado em: 2017-05
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18. Mineral element and heavy metal (cadmium, lead and arsenic) levels of bee pollen in Turkey
Abstract In this study, mineral element and heavy metal levels in bee pollen produced in various regions of Turkey (20 samples) and imported bee pollen (4 samples), were determined using an Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) device. Mineral and heavy metal levels of bee pollens produced in Turkey were determined to be within t
Food Sci. Technol. Publicado em: 09/03/2017
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19. Evaluation of mineral content and heavy metals of dromedary camel milk in Iran
Abstract The aim of this study was to determine the amount of major mineral compounds and heavy metals of camel milk in Iran. For this purpose camel milk samples were collected from seven regions of Iran include Qazvin, Golestan, Semnan, Sistan-Baluchestan, Khuzestan, Bushehr and Tehran. The samples were analyzed using Inductively Coupled Plasma-Optical Emis
Food Sci. Technol. Publicado em: 13/10/2016
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20. Evaluation and enhancement of heavy metals bioremediation in aqueous solutions by Nocardiopsis sp. MORSY1948, and Nocardia sp. MORSY2014
ABSTRACT An analysis of wastewater samples collected from different industrial regions of Egypt demonstrated dangerously high levels of nickel (0.27-31.50 mg L-1), chromium (1.50-7.41 mg L-1) and zinc (1.91-9.74 mg L-1) in the effluents. Alarmingly, these heavy metals are among the most toxic knownones to humans and wildlife. Sixty-nine Actinomycete isolates
Braz. J. Microbiol.. Publicado em: 2016-09
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21. Heavy Metals in Garra gotyla , Cyprinus carpio and Cyprinion watsoni from the River Panjkora, District, Lower Dir, Khyber Pakhtunkhwa, Pakistan
ABSTRACT This study was conducted in the River Panjkora, Pakistan, in order to assess the level of heavy metals accumulated in the liver, kidneys, gills and muscle tissues of three highly consumed fish species by the local community, Garra gotyla, Cyprinus carpio and Cyprinion watsoni. The heavy metals including manganese (Mn), iron (Fe), chromium (Cr), zinc
Braz. arch. biol. technol.. Publicado em: 01/08/2016
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22. ESTUDO DO EFEITO DE MATRIZ NA DETERMINAÇÃO DE METAIS EM ÓLEOS BÁSICOS RERREFINADOS POR FLUORESCÊNCIA DE RAIOS X POR ENERGIA DISPERSIVA
In this article, the results of the study of the matrix effect in the determination of metals calcium, chromium, iron, nickel, copper, zinc, molybdenum, cadmium, barium and lead in base oil using Energy Dispersive X-Ray Fluorescence (EDX) are presented. Sensitivities obtained for each calibration curve were evaluated where calcium, chromium, copper, cadmi
Quím. Nova. Publicado em: 2015-06
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23. Ligand-Less in situ Surfactant-Based Solid Phase Extraction for Preconcentration of Cobalt, Nickel and Zinc from Water Samples Prior to their FAAS Determination
Uma nova e simples extração de fase sólida (LL-ISSPE), baseada em surfactante, sem ligantes e in situ foi desenvolvida para a pré-concentração de cobalto, níquel e zinco em amostras de água. Neste método, um surfactante catiônico contendo um grupo alquila (brometo de n-dodeciltrimetilamônio) é
J. Braz. Chem. Soc.. Publicado em: 2015-01
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24. Estudo do sistema BlaR/Blal e de dois operons codificando sistemas de efluxo RND em Caulobacter crescentus. / Study of the BlaR/BlaI system and two operons encoding RND efflux systems from Caulobacter crescentus.
The aim of this work is to characterize three clusters of genes from the alpha proteobacterium Caulobacter crescentus involved in metal and antibiotics response. We analyzed the cluster comprising genes CC1637-CC1640, which contains a BlaR/BlaI signal transduction system, and we performed a comparative analysis with two RND efflux systems consisting on genes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2012