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Search Results: 1 - 10 of 87428 matches for " José Eduardo Peres "
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Caracteriza??o de minérios: uso do Magstream-Model 100, suas vantagens e limita??es
Salum, Maria José Gazzi;Peres, Ant?nio Eduardo Clark;
Rem: Revista Escola de Minas , 2002, DOI: 10.1590/S0370-44672002000100011
Abstract: this paper discusses the importance of mineral characterization as a support to understand their behavior in mineral processing and in the control of the processes and quality of the products obtained. also presented is a brief review on the main techniques used in minerals characterization, including the procedures for minerals separation from an ore. special attention was given to the technique of mineral separation from an ore according to their specific gravities using a device called magstream-model 100. it is shown that the magstream process, which involves the use of a magnetic fluid as a medium for mineral separation, a magnetic field and a rotation speed system, offers advantages compared to the heavy liquids technique. however, the magstream process leads to changes on mineral surface properties, imparting to them different flotation behaviors. this fact is considered a limitation for its use when further studies with the minerals involve surface properties.
Caracteriza o de minérios: uso do Magstream-Model 100, suas vantagens e limita es
Salum Maria José Gazzi,Peres Ant?nio Eduardo Clark
Rem: Revista Escola de Minas , 2002,
Abstract: O presente trabalho discute a importancia da caracteriza o de minérios como suporte para o entendimento do comportamento de seus minerais frente a processos de tratamento de minérios, controle de processos e controle da qualidade dos produtos obtidos. é, também, apresentada uma breve revis o da literatura sobre as principais técnicas de caracteriza o, incluindo aquelas utilizadas para a separa o de minerais de um minério. Especial aten o foi dada à técnica de separa o de minerais de um minério, utilizando um equipamento chamado Magstream-Model 100. O trabalho mostra que o processo Magstream, que envolve o uso de fluido magnético como meio separador, campo magnético e um sistema de rota o, oferece vantagens em rela o a outras técnicas, como, por exemplo, a de líquidos densos. Entretanto o processo utilizado pelo Magstream leva a mudan as em propriedades de superfície dos minerais, modificando seus comportamentos frente à flota o. Esse fato foi considerado como uma limita o de seu uso, quando estudos posteriores com os minerais processados no Magstream envolvem propriedades de superfície.
Metodologia para estima??o de parametros físico-químicos de espumas
Luz, José Aurélio Medeiros da;Peres, Ant?nio Eduardo Clark;
Rem: Revista Escola de Minas , 2001, DOI: 10.1590/S0370-44672001000400006
Abstract: the calculation of flow splitting in froths and foams is needy in several instances in the industrial field. the liquid splitting can be calculated in terms of viscosity, surface tension, and the syneresis specific rate of the interstitial pulp, considering that, under equilibrium and during air sparging, the drainage flow rate of liquid matches the upward liquid flow rate caused by the air bubbles rising. this works treats on the determination of these properties, using very simple experimental setup.
Metodologia para estima o de parametros físico-químicos de espumas
Luz José Aurélio Medeiros da,Peres Ant?nio Eduardo Clark
Rem: Revista Escola de Minas , 2001,
Abstract: A quantifica o da parti o de fluxo em espuma é necessária em várias instancias da indústria, sendo exemplo clássico as opera es de separa o seletiva por flota o. A parti o de líquido no circuito pode ser determinada em fun o da viscosidade, da tens o superficial, assim como da taxa específica de sinérese da polpa intersticial, ao se levar em conta o equilíbrio sob aera o, entre a vaz o de líquido drenado da espuma e a de líquido arrastado pelo gás. A tens o interfacial pode ser calculada pelo método da gota cadente em tubo capilar, usando-se fatores de corre o. Esse trabalho exp e técnicas simples para determina o desses parametros físico-químicos de espumas, com uso de aparato experimental de fácil aquisi o ou constru o.
Quality of minimally processed snap bean in function of rinse and sanification operations/ Qualidade de feij o-vagem minimamente processado em fun o das opera es de enxague e sanifica o
José Eduardo Peres,Maria Cecília Arruda,Mirian Souza Fileti,Ivan Herman Fischer
Semina : Ciências Agrárias , 2011,
Abstract: This work had the purpose to evaluate the quality of the minimally processed snap bean in function of rinse and sanification operations. Snap bean cv. Itatiba 2 were selected, cleaned, processed and submitted to the following treatments: T1 – rinse in water only, T2 – rinse in water, followed by immersion in chlorinated solution (100 mg.L-1) for 5 minutes, T3 – immersion in chlorinated solution (100 mg.L-1) for 5 minutes and T4 – without rinse and without immersion in chlorinated solution (control). The minimally processed snap beans were assessed for appearance, color of the section surface and microbiological characteristics. About the color of the section surface, it could be noticed from the ninth day of storage that the snap bean of the Treatment 1 showed less darkening in relation to the other treatments, and also better accepted sensorially. It wasn’t detected Salmonella and neither coliforms at 45°C in any sample of the different treatments. In relation to the total coliform counts, it could be noticed reduction with the sanification (T2 and T3) on the processing day, and, in general, an increase in the coliform counts during the storage. The total bacteria count was > 105 UFC.g-1 in the snap bean of all treatments in the sixth day of storage, except in that one, which the snap beans were rinsed and sanitized. Therefore, this treatment is recommended and guarantee six days of shelf life for minimally processed snap bean, limited by the bacteria growth. Este trabalho teve como objetivo avaliar a qualidade de vagens minimamente processadas em fun o das opera es de enxague e sanifica o. Vagens cv. Itatiba 2 foram selecionadas, higienizadas, processadas e submetidas aos seguintes tratamentos: T1 - enxágue somente em água, T2 - enxágue em água, seguido de imers o em solu o clorada (100 mg.L-1) por 5 minutos, T3 - imers o em solu o clorada (100 mg.L-1) por 5 minutos e T4 - sem enxágue e sem imers o em solu o clorada (controle). As vagens minimamente processadas foram avaliadas quanto à aparência, colora o da superfície de corte e aspectos microbiológicos. Em rela o à colora o da superfície de corte, observou-se a partir do nono dia de armazenamento que as vagens do Tratamento 1 apresentaram menor escurecimento em rela o às dos demais tratamentos, sendo também melhor aceitas sensorialmente. Salmonella e coliformes a 45oC n o foram detectados em nenhuma amostra dos diferentes tratamentos. Em rela o à contagem de coliformes totais observou-se no dia do processamento redu o com a sanifica o (T2 e T3) e em geral, aumento dos coliformes durante
Mortality, weight loss and quality of life of patients with morbid obesity: evaluation of the surgical and medical treatment after 2 years
Pimenta, Gunther Peres;Saruwatari, Robson Tadashi;Corrêa, Manoela Regina Alves;Genaro, Pedro Luiz;Aguilar-Nascimento, José Eduardo de;
Arquivos de Gastroenterologia , 2010, DOI: 10.1590/S0004-28032010000300010
Abstract: context: the surgical treatment for morbid obesity is becoming common in this country. only a few papers reported the long-term results of the surgical approach for morbid obesity, mainly in terms of quality of life. objective: to compare mortality rate, weight loss, improvement of both diabetes and hypertension, and quality of life of patients from the public healthcare in cuiabá, mt, brazil, who underwent either medical or surgical interventions after a minimum of 2 years. methods: the population of this study was constituted by morbidly obese patients who initiated treatment between june 2002 and december 2006. the casuistic consisted of 89 patients submitted to medical therapy and 76 patients who underwent surgical procedures. the main variables were weight loss, improvement of hypertension and diabetes, quality of life, and mortality. results: the overall results showed that weight loss was significant in the two groups (p<0.001); however surgical patients showed a greater loss than the medical group (p = 0.05). the improvement of diabetes and hypertension was significantly greater in the surgical group (p<0.001), in which no cases of diabetes persisted. there was an increase in cases of hypertension among patients receiving medical attention. mortality occurred in six cases (6.7%) of the medical group and in five cases (6.6%) of the surgical group (p = 0.97). the median grade of the quality of life score obtained by surgical patients (2.37 [range: -2.50 to 3.00]) was significantly greater (p<0.001) when compared to the medical group (1.25 [range: -1.50 to 3.00]). conclusion: the surgical group presented better results regarding the weight loss, quality of life and improvement of hypertension and diabetes. there was no significant difference in mortality rate between the two groups after a minimum of 2 years.
Compressibilidade de um Argissolo Vermelho-Amarelo trafegado e escarificado
Vogelmann, Eduardo Saldanha;Mentges, Marcelo Ivan;Reichert, José Miguel;Rosa, David Peres da;Barros, Cláudia Alessandra Peixoto de;Reinert, Dalvan José;
Ciência Rural , 2012, DOI: 10.1590/S0103-84782012005000004
Abstract: farm machinery wheeling is considered a major source of soil compaction. the use of chisel plow can minimize such effects, but the chisel can cause subsurface compaction. the aim of this study was to evaluate the effect of traffic and is present below the compaction layer thought compressive parameters of soil. the treatments investigated were: no-tillage, no-tillage with additional traffic (traffic intensity of 24.67mg km ha-1), no-tillage chiseling recent implanted, no-tillage with additional traffic and chiseling recent implanted. for the density, void ratio, preconsolidation pressure and coefficient of compressibility determination in the layers 0.0-0.10m, 0.10-0.20m, 0.20-0.30m and 0.30 to 0.40m samples were collected. the treatment no-tillage showed the lowest load support capacity and greater susceptibility to compaction. the traffic intensity of 24.67mg km ha-1 increased bulk density and decreased void ratio until 0.30m depth. the chisel plow did not affect the preconsolidation pressure and coefficient of compressibility of soil layer below the line of action of the chisel tip.
Métodos de obten??o da capacidade de suporte de carga de um argissolo cultivado
Rosa, David Peres da;Reichert, José Miguel;Mentges, Marcelo Ivan;Vieira, Davi Alexandre;Vogelman, Eduardo Saldanha;Rosa, Vanderleia Trevisan da;Reinert, Dalvan José;
Revista Brasileira de Ciência do Solo , 2011, DOI: 10.1590/S0100-06832011000500010
Abstract: the control of soil load support capacity can reduce the damaging effects of compaction. the main objective of this study was to evaluate the use of prediction models of consolidation stress under different conditions for a hapludalf. the treatments consisted of: (a) soil under no-tillage (control) (b) soil under no-tillage with traffic intensity of 24.79 mg km ha-1 and (c) 49.59 mg km ha-1; (d) soil after five months of minimum tillage; and (e) soil under minimum tillage compacted by traffic (soil stress of 260 kpa and 24.67 mg km ha-1). the soil support capacity was predicted by the following methods: (1) intersection of virgin compression line (vcl) with x-axis at zero deformation; (2) intercept of the vcl and regression with the first two points of the curve; (3) intercept of the vcl and regression with the first three points of the curve; (4) soil resistance at 2.5 % deformation; (5) method of casagrande with sigmoidal fit of the van genuchten equation (reference); and (6) method of pacheco & silva with sigmoidal fit of the van genuchten equation. the values by the methods with 2.5 % deformation and intersection of vcl with the x-axis tended to be underestimated, compared to the reference in all layers. the regression method on the other hand varied according to the slope of the vcl; at high slopes, the values tended to be over- and at low slopes underestimated.
Síncope cardíaca reflexa por "nevralgia" do glossofaríngeo: rara apresenta??o dessa doen?a
Korkes, Helio;Oliveira, Eduardo Mesquita de;Brollo, Luigi;Hachul, Denise Tessariol;Andrade, José Carlos da Silva;Peres, Mario Fernando Prieto;Schubsky, Victor;
Arquivos Brasileiros de Cardiologia , 2006, DOI: 10.1590/S0066-782X2006001800025
Abstract: the first description of severe pain in the distribution of the glossopharyngeal nerve is credited to weisenberg, in 19101, in a patient with cerebellopontine angle tumor. however, it was harris, in 19262, who coined the term glossopharyngeal neuralgia to describe this rare condition characterized by paroxysms of excruciating pain located laterally at the back of the tongue, soft palate, throat, and lateral and posterior pharynx, radiating to the ear. swallowing, coughing, yawning or chewing may trigger pain, which usually lasts from seconds to minutes. the association between glossopharyngeal neuralgia and syncope is very rare, being identified by brief episodes of bradycardia, asystole, and hypotension. such an association, with this same pathophysiology, was first described by riley et al3 in 1942.
Characterization of Micronutrient Deficiency in Australian Red Cedar (Toona ciliata M. Roem var. australis)
Bruno da Silva Moretti,Antonio Eduardo Furtini Neto,Bruno Peres Benatti,Eduane José de Pádua
International Journal of Forestry Research , 2012, DOI: 10.1155/2012/587094
Abstract:
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