Precipitates Extraction
Mostrando 1-12 de 22 artigos, teses e dissertações.
-
1. Nitretação a plasma da junta soldada do aço inoxidável super duplex SAF 2507
RESUMO Os aços inoxidáveis superduplex (AISD) apresentam em sua microestrutura as fases ferrita e austenita, de modo a conciliar boas propriedades mecânicas e de resistência à corrosão. Estes materiais possuem grande aplicação na indústria de extração de petróleo e na petroquímica. Quando estão sujeitos a estas aplicações, os dutos de AISD so
Matéria (Rio J.). Publicado em: 20/05/2019
-
2. Protein concentrates from defatted rice bran: preparation and characterization
Abstract The goal of this work is to determine the optimal conditions for the obtaining of protein concentrates from rice bran. The effects of defatting processes applied to this product in laboratory and in industrial scales were investigated. Through two experimental designs were performed, and production conditions to obtain the protein concentrates were
Food Sci. Technol. Publicado em: 26/10/2017
-
3. Study of aluminum nitride precipitation in Fe- 3%Si steel
For good performance of electrical steels it is necessary a high magnetic induction and a low power loss when submitted to cyclic magnetization. A fine dispersion of precipitates is a key requirement in the manufacturing process of Fe- 3%Si grain oriented electrical steel. In the production of high permeability grain oriented steel precipitate particles of c
Mat. Res.. Publicado em: 11/06/2013
-
4. Chitosan as flocculant agent for clarification of stevia extract
Stevia is used as a sweetener due to its low calorific value and its taste, which is very similar to that of sucrose. After extraction from dried leaves, stevia extract is dark in colour, and therefore needs to be whitened to increase acceptance by consumers. In this study we tested chitosan, a cationic polyelectrolyte, as flocculant agent for the whitening
Polímeros. Publicado em: 30/10/2012
-
5. Estudo da Estrutura Local dos SÃtios de Ferro em Ligas FeCrMo por Espectroscopia MÃssbauer e DifraÃÃo de Raios -X / Study of the local structure of iron sites in Fe-Cr-Mo alloys by MÃssbauer Spectroscopy and X-ray Diffraction
Ligas Fe-Cr-Mo sÃo amplamente utilizadas na fabricaÃÃo de tubulaÃÃes para a indÃstria petroquÃmica nos processos de transporte e refino do petrÃleo devido a uma combinaÃÃo de propriedades como dureza, tenacidade e resistÃncia à fluÃncia e à corrosÃo em altas temperaturas. Atualmente, a liga Fe-9Cr-1Mo à a mais comumente utilizada. Contudo, em
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/06/2011
-
6. Óleos essenciais e compostos fenólicos de espécimes masculinos e femininos de Baccharis uncinella DC
This study aimed to: develop methodological sequences for the collection and analysis of essential oils and phenolic compounds of B. uncinella, applicable to the study of other species of the genus Baccharis; determined by techniques of gas chromatography-mass spectrometry, the chemical composition of essential oils from the leaves of male and female specime
Publicado em: 2010
-
7. Recovery of tin and copper by recycling of printed circuit boards from obsolete computers
This paper presents the experimental results for the leaching of printed circuit boards (PCB) from obsolete computers for extracting and recovering tin and copper by means of leaching followed by precipitation. Printed circuit boards were dismantled, cut into small pieces, and fed into a cylinder mill. The powder obtained was leached by using the aqueous sol
Brazilian Journal of Chemical Engineering. Publicado em: 2009-12
-
8. Estudo da transformação durante o resfriamento continuo e da microestrutura do aço microligado X80 utilizado na construção de tubos para transporte de gás natural e petróleo. / Study of the transformation during the continuous cooling and the microstructure of microalloyed steel X80 used in the building of pipelines for gas and oil transport.
The continuous increase of energy generated from petroleum and natural gas created the need to improve the mechanical properties of microalloyed steels used in gas and oil pipelines, in order to increase their flow with smaller costs and higher reliability. The control of the different phases, morphology of microconstituents like ferrite plus carbide aggrega
Publicado em: 2008
-
9. Evolução da microestrutura e da textura durante o processamento de chapas da liga Al-Mn-Fe-Si (3003) produzidas por lingotamento contínuo: um estudo comparativo com o processo semi-contínuo. / Microstructure and texture evolution of the Al-Mn-Fe-Si (3003) aluminum alloy produced from continuous casting process: comparative analysis with semi-continuous casting process.
The main reason for the development of this PhD Thesis was to compare the microstructures and textures of the 3003 aluminum alloy produced from continuous and semi-continuous casting processes. The roll caster process (continuous casting) has been increasingly used in the aluminum industry. Products usually obtained by means of heavy rolling operations in th
Publicado em: 2005
-
10. Dynamics of potencially toxic metals in soil after sewage sludge application / Dinamica de metais potencialmente toxicos no solo apos aplicação de lodo de esgoto
The present research aims at studying the dynamics of six potentially toxic metals ? Cd, Cr, Cu, Ni, Pb and Zn ? on a clay loam soil, where sewage sludge was incorporated in a single application. The soil under analysis was contained in six fiberglass prototypes (1.2 m high x 1.0 m in diameter); inside each prototype, free-drainage collectors were installed
Publicado em: 2005
-
11. Extraction of serum vitamin B12 for radio-isotopic and Lactobacillus leichmannii assay.
The protein precipitates discarded during the extraction process of the Lactobacillus leichmannii vitamin B12 assay have been shown to contain significant amounts of vitamin B12. This loss of vitamin B12 provide a satisfactory explanation for many of the descrepancies between the serum vitamin B12 values obtained by the L. leichmannii method and the radio-is
-
12. Immunological Homology Between Crystal and Spore Protein of Bacillus thuringiensis
Spore suspensions containing about 0.3% crystals and crystal suspensions containing about 0.1% spores were obtained from cultures of Bacillus thuringiensis by extraction with a two-phase system. Both preparations were tested for the presence of contaminating material from vegetative cells and were judged to be clean. Solutions of spore protein were obtained