Encontrados 6 documentos, a visualizar página 1 de 1
The role of phenols from bagasse vacuum pyrolysis bio-oil in cupper sulfured or...
Brossard,L. E.; Beraldo,A. L.; Cortez,L. A. B.; Brossard Jr,L. E.; Maury,E. D.; Brossard,C. O.Vacuum pyrolysis bagasse bio-oil collected in a series of sequential fractions was analyzed for total percentage of phenols and levoglucosan components. It was established that the ratio total phenols- to-levoglucosan could be used as an indicator of the performance of alkaline solutions of bio-oil fractions (SABO) when they are used as foaming agents to benefit flotation of sulfured cupper minerals. A high tot...
The surface-active bio oil solution in sulfured copper mineral benefit
Brossard,L.E.; Varela,N.; Brossard Jr.,L.E.; Brossard,C.O; Cortez,L.A B.; Magalhães,P.G.Surface-active bio-oil (SABO) solutions, prepared from vacuum pyrolysis bio-oil with a phenol-to-levoglucosan mass ratio of 4.8, was compared to pine-oil (PO) as foaming agent in the process of flotation of sulfured copper minerals. With the aid of 2³ factorial designs, regression models were obtained for % Cu in flotation concentrate (L Cu) and % Cu recovery (R), as functions of foaming agent-to-Cu mineral, co...
THE STRATEGY OF EMPIRICAL RESEARCH AND OPTIMIZATION PROCESS
Brossard Perez,L.E.; Cortez,L.A.B.; Mesa,J.; Bezzon,G.; Olivares Gómez,E.Empirical modeling is considered from the perspectives of a general scheme for the Strategy of Empirical Research and Optimization Process (SEROP). This approach intends to facilitate the understanding of the necessary steps to arrive to mathematical models able to appropriately describe the behavior of a group of controllable independent variables related to a certain response. Aspects connected with definitio...
Use of a rotational bench viscometer to study the influence of temperature and ...
Brossard Perez,L.E.; Bezzon,G.; Olivares Gómez,E.; Cortez,L.A.B.Brookfield R.V.T. apparent viscosity measurements of 31.1 to 73º Brix vinasses, with and without nondissolved solids (N.D.S.), were carried out at varying rotation speeds (N) and temperatures (T). A regression analysis of this data was carried out to select the corresponding mathematical models. It was concluded that apparent Brookfield viscosity for low concentration vinasses (up to 52.4º Brix) depends only on...
Diabetes e Gravidez. Experiência da Consulta de Medicina Materno-Fetal do Servi...
Fernades, ME; Leitão, C; Henriques, O; Cortez, L; Campos, OOs autores realizaram um estudo retrospectivo das 87 grávidas vigiadas na Consulta de Diabetes do Hospital de Dona Estefânia com diabetes pré-gestacional tipo 1 e 2 e diabetes gestacional, durante um período de 2 anos. Analisararn a idade das grávidas, raça, paridade, tipo de diabetes, patologia associ ada, antecedentes familiares de diabetes, idade gestacional em que foi feito o diagnóstico de diabetes, insuli...
Myxedema coma.
Fonseca, F; Unidade de Endocrinologia, H. Curry Cabral, Lisboa.; Cortez, L; Guerra, L; Afonso, A; Agapito, A; Malheiro, F; da Costa, CFive patients, 4 female and 1 male, aged 45 to 73, were observed in myxedema coma between 1984 and 1992. In three patients hypothyroidism was not known. Depressed consciousness, hypothermia, bradycardia and no goiter were common to all and a precipitating factor could be identified in 3 of them. Therapy included L-thyroxine and/or triiodothyronine by nasogastric tube, hydrocortisone and supportive measures. Out...
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