T6 Heat Treatment
Mostrando 13-24 de 72 artigos, teses e dissertações.
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13. Influência da adição de nanopartículas de TiO2 na obtenção de compósitos a base de liga AA2014 fabricada via metalurgia do pó / Influence of the addition of TiO2 nanoparticles in the composites formation based AA2014 alloy manufactured by powder metallurgy
Aluminum matrix composites and its alloys, especially AA2014, are widely used in automotive and aeronautics applications. The properties of this are very influenced by hardening treatment, however its use is limited at temperatures above 150C due to loss of properties caused by the growth of precipitates at this temperature. The addition of a new phase, fine
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2012
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14. Comportamento sexual, parâmetros seminais e diluição pós-congelamento de sêmen de jumentos (Equus asinus) da raça Pêga / Sexual behavior, seminal parameters and dilution after freezing Pêga breed donkeys (Equus asinus) semen
The aim of this study was to elucidate aspects of asinine behavior from the description of various collections using an artificial vagina and relate this behavior with the seminal parameters. We evaluated also the availability of the formulation of the diluent T2-94 plus dimethylformamide in the protection of sperm cells during cryopreservation of semen from
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/03/2012
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15. Efeito do tratamento tÃrmico e do Ãcido salicÃlico na atividade de polifenoloxidase, peroxidase e fenilalanina amÃnia-liase, nas caracterÃsticas fÃsico-quÃmicas e na incidÃncia de patÃgenos em morangos durante o armazenamento / Effect of heat treatment and salicylic acid on polyphenoloxidase, peroxidase and phenylalanine ammonia-liase activity, physical-chemistry characteristics and incidence of pathogens in strawberries during storage
The strawberry is a fruit that is highly perishable and are very susceptible to physical damage and fungal attack. The use of fungicides has been the primary method for reducing post-harvest diseases. Accordingly, alternative methods free of chemicals must be used in post-harvest to maintain the quality and prolong the life reduce the incidence of fungi. The
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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16. Efeito da Taxa de Resfriamento e dos Tratamentos Térmicos sobre as Propriedades Mecânicas da Liga Al-Si-Mg (A356.0) Fundida / Efeito da Taxa de Resfriamento e dos Tratamentos Térmicos sobre as Propriedades Mecânicas da Liga Al-Si-Mg (A356.0) Fundida
The A356.0 alloy is widely used in aerospace and automotive industry and other structural applications which require high mechanical strength. The control of solidification cooling rate and heat treatments are necessary to obtain more appropriate microstructures resulting in improvement of their properties. In this paper was evaluated the influence of coolin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2011
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17. Combined effects of postharvest heat treatment and chitosan coating on quality of fresh-cut mangoes (Mangifera indica L.).
The influence of heat treatment combined with coating on sensory quality, physico-chemicals characteristics (firmness, colour, pH, titratable acidity, total soluble solids and total carotenoids content) and microbiological quality of fresh-cut mangoes were studied. Whole mangoes (Mangifera indica cv ?Tommy Atkins?) were subjected to hot water dipping (HWD) a
International Journal of Food Science & Technology. Publicado em: 2011
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18. Estudo dos efeitos da alta ingestÃo de cloreto de sÃdio por via oral sobre o metabolismo diÃrio e funÃÃo renal de ratos. / Study of effects on the daily metabolism and the renal function of rats under high oral ingestion of sodium chloride.
Guanylin (GN), uroguanylin (UGN), and the bacterial heat-stable enterotoxin (ST) peptides comprise a new family of cyclic guanosine 3â-5â monophosphate (cGMP)-regulating agonist. Ingestion of a salt meal induces secretion of GN and UGN into the intestinal lumen, where they inhibit Na+ absorption and induces Cl-, HCO3- , and water secretion. Simultaneously,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/01/2009
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19. Estudos de alterações funcionais de macrofagos submetidos a hipoxia no modelo in vitro da leishmaniose / Studies of funcional alterations of macrophages submetted to hypoxia in ana in vitro model of leishmaniasis
Regions of low oxygen tension (hypoxia) are common features of inflamed/infected tissues. The analyses of cell phenotypic alterations by hypoxia are helpful for understanding of the pathological mechanisms and treatment resistance and for the development of cellular therapies. Macrophages, cells involved in the clearance of microorganisms from infected tissu
Publicado em: 2009
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20. Estudo experimental da oxidação dos aços inoxidáveis ferríticos AISI 444 e AISI 439 a altas temperaturas em ar
It was carried on a comparative study of the response to oxidation, in high temperatures and dry air atmosphere, of the stainless steel AISI 444 and AISI 439, with the temperature range between 850C and 1.050C. Such steels differ in their chemical composition basically by containing molybdenum in the AISI 444 steel. It were used samples supplied by ArcelorMi
Publicado em: 2008
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21. Estudo de rotas alternativas para a fabricação de ímãs compósitos à base de Sm2Fe17N3
This monograph thesis concerns the study of alternative processing routes regarding the fabrication of permanent magnets based on the Sm2Fe17N3 intermetallic compound. The study is mainly based on the compound synthesis in powder form and its subsequently shaping to get the final magnet body. Instead of the traditional induction melting of metallic samarium
Publicado em: 2008
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22. Efeito do binômio Tempo/Temperatura sobre a fração lipídica de óleos vegetais submetidos a processos de fritura
Studies show that the frying process causes changes in the physical and chemical aspects of oils which affect their chemical, sensorial and nutritional quality. This study aimed to evaluate the effect of the time/temperature pair on the lipid fraction of vegetable oils used in the frying process. Four Meal Production Units (MPU) were selected which served on
Publicado em: 2008
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23. Influência do tratamento térmico e do tipo de reforço nas propriedades de compósitos a base de ligas de alumínio obtidos via metalurgia do pó.
The development of composite materials is a result of the need to conjugate the properties of two or more components in one, thus maximizing the individual properties. The Aluminium Matrix Composites (AMCs) reinforced with hard particles have bulked the sectors of application due to the properties as low density and increased wear resistance. The technique o
Publicado em: 2007
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24. Estudo do comportamento ao desgaste e corrosÃo dos aÃos inoxidÃveis AISI 316L e AISI 420 depositados pelo processo de aspersÃo tÃrmica a arco elÃtrico
Mechanical components behavior in service, are extremely dependent on the surface quality, the contact between areas and the environment where they are applied. Particularly, corrosion and ware damage, directly and indirectly, mechanical components surface that result in rise production and maintenance cost due to no programmed equipments stops to repair or
Publicado em: 2007