Cellular Metals
Mostrando 1-12 de 57 artigos, teses e dissertações.
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1. Effect of Growth Velocity and Zn Content on Microhardness in Directionally Solidified Al-Zn Alloys
In this study, Al-xZn (x=1, 3, 5, 7, 10 and 20 wt. %) alloys were prepared using metals of 99.99% high purity in the vacuum atmosphere. These alloys were directionally solidified upward with a constant temperature gradient, G (10.3 K/mm) and different growth velocities (V) between 8.25 and 165 µm/s in the directional solidification apparatus. The experiment
Mat. Res.. Publicado em: 13/09/2018
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2. Role of glutathione in tolerance to arsenite in Salvinia molesta, an aquatic fern
ABSTRACT In many plant species, tolerance to toxic metals is highly dependent on glutathione, an essential metabolite for cellular detoxification. We evaluated the responses of glutathione metabolism to arsenite (AsIII) in Salvinia molesta, an aquatic fern that has unexplored phytoremediation potential. Plants were exposed to different AsIII concentrations i
Acta Bot. Bras.. Publicado em: 21/09/2017
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3. Bioleaching of gold, copper and nickel from waste cellular phone PCBs and computer goldfinger motherboards by two
Aspergillus niger strainsIn an effort to develop alternate techniques to recover metals from waste electrical and electronic equipment (WEEE), this research evaluated the bioleaching efficiency of gold (Au), copper (Cu) and nickel (Ni) by two strains of
Aspergillus niger in the presence of gold-plated finger integrated circuits found in computer motherboards (GFIBraz. J. Microbiol.. Publicado em: 2015-09
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4. Effect of Continuous and Pulsed Current on the Metallurgical and Mechanical Properties of Gas Tungsten Arc Welded AISI 4340 Aeronautical and AISI 304 L Austenitic Stainless Steel Dissimilar Joints
In this research work, the weldability of low alloyed AISI 4340 aeronautical steel and AISI 304L austenitic stainless steel joined by continuous current (CC) and pulsed current (PC) gas tungsten arc welding (GTAW) techniques, using ER309L and ERNiCr-3 filler metals was investigated. The main focus of the study involves the investigation on the effect of cont
Mat. Res.. Publicado em: 2015-02
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5. Synthesis of Co-Al-Cl LDH by cathodic material reprocessing from cellular phone batteries
The aim of this paper was the recovering of the cathodic material from discarded lithium ion batteries for obtainment of the lamellar double hydroxides (LDHs) by the co-precipitation method at variable pH in HCl and H2O2 1:1 (v/v) acid solution containing Co and Al (extracted from cathodic material composed of LiCoO2 and aluminum foil). These metals were pre
Mat. Res.. Publicado em: 29/04/2014
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6. Evaluation of the corrosion behavior of the al-356 alloy in NaCl solutions
Cellular metals are a new class of materials with promising applications and a unique combination of physical, chemical and mechanical properties. The Al-356 alloy is used to manufacture metal foams from NaCl preforms. Despite the usefulness of these materials, their performance may be affected by corrosion due to residual salt. This paper reports the study
Química Nova. Publicado em: 2011
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7. Material particulado fino presente no ar da cidade de São Paulo promove alterações nas células de Purkinje: um estudo experimental em embrião de galinha / Urban fine particles induce alterations in Purkinje cells: an experimental study in chick embryo
Air pollutants are associated to several diseases including those related to central nervous system. The aim of this work was to evaluate the effect of urban fine particles (PM2.5) in chicken embryo Purkinje cells. A single dose of PM2.5 suspension in two different concentrations (1.5 or 20.0 Pg.100Pl-1) was injected in fresh laid fertilized eggs on E0. Cont
Publicado em: 2011
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8. Kinetic and equilibrium study of biosorption of lead and copper ions by sargassum seaweed in nanocomponent and binary systems / Estudo cinético e do equilíbrio da biossorção dos íons chumbo e cobre pela macroalga Sargassum sp. em sistemas monocomponente e binário
Brown seaweeds from the genus Sargassum are widely studied for use as potential candidates for biosorption purposes, particularly in the treatment of heavy-metals contaminated effluents. The cellular structure of this seaweed presents charged molecules, such as alginic acid, able to attract and recover metal cation ions. The objective of this work was to stu
Publicado em: 2010
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9. Solidification microstructures and mechanical and corrosion resistances of dilute Pb-Sn alloys / Microestrutura de solidificação e resistencias mecanicas e a corrosão de ligas Pb-Sn diluidas
Lead-acid batteries manufacturers have modified the manufacturing processes and the chemical composition of alloys used in battery grids in order to decrease their weight as well as to reduce the production costs, and to increase the battery life-time cycle and the corrosion-resistance. The morphological microstructures characterized by cellular and dendriti
Publicado em: 2009
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10. MORPHOLOGICAL, BIOCHEMICAL AND GENOTOXIC BIOMARKERS FOR ENVIRONMENTAL CONTAMINATION IN MUGIL LIZA, GEOPHAGUS BRASILIENSIS AND TILAPIA RENDALLI / BIOMARCADORES MORFOLÓGICOS, BIOQUÍMICOS E GENOTÓXICOS DE CONTAMINAÇÃO AMBIENTAL EM MUGIL LIZA, GEOPHAGUS BRASILIENSIS E TILAPIA RENDALLI
The comparison of biochemical, morphological and genotoxic responses sampled from areas protected from cronic or acute contamination with responses of organisms sampled from historically contaminated areas is useful in determining the environmental quality of ecosystems. This study aimed to analyse biomarker responses using Mugil liza (mullets), Geophagus br
Publicado em: 2008
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11. Produção de esponjas metalicas por tixoconformação em pre-formas removiveis e sua caracterização mecanico-metalurgica / Production of metal sponges by thixoforming into removable space holders preform and their machanical and metallurgical characterization
Este trabalho teve como objetivo estudar o processo de produção de esponjas metalicas por tixoconformacao em pré-formas removiveis e caracterizacao mecanico-metalurgica do produto, visando a compreensão da influencia de parametros de processo nas suas caracteristicas estruturais e propriedades. A liga empregada, AA2011, foi infiltrada sobre pre-formas de
Publicado em: 2008
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12. Uma visão da química bioinorgânica medicinal
Metals play a vital role in human and plant physiology and important research is directed towards exploring the interrelated mechanisms that govern their interactions with biomolecules. Bioinorganic medicinal chemistry studies the functions, processing, storage and applications of metal ions and their complexes in biological systems. This paper presents a br
Química Nova. Publicado em: 2007