Avaliação da vinhaça líquida em substituição à água na terminação de bovinos em confinamento 2. Parâmetros etológicos e perfil metabólico

Fifteen animals from Canchim group and fifteen from Nelore were observed in the following treatments: water (A), molasses soluble + magnesium oxide (V) and molasses soluble + magnesium oxide + sodium bicarbonate (V+B). They were observed during continuous 24 hours every 30 days up to 90 days periods. During the weighting, every 28 days blood samples were collected to determine metabolic outline. Treatments did not affect (P>.05) animal behaviour on metabolic and the obtained mean values were within the normal range. They were, respectively for Canchim and Nelore: Feeding 270 and 223 minutes; Rumination 374 and 356 minutes; Idleness 745 and 863 minutes; Glicose 86 and 88 mg/dl; Urea 10 and 23 mg/dl: Uric acid 1,3 and 1,2 mg/dl; Total protein 7,0 and 6,8 g/dl; Albumin 3,1 and 3,1 g/dl; Creatinin 1,5 and 1,6 mg/dl; Sodium 140 and 142 meq/dl; Potassium 4,2 and 4,3 meq/1 and Calcium 10,0 and 9,8 mg/dl. It was concluded that molasses soluble as a substitute of water has not changed the ethologic parameters neither metabolic outline of both genetic group when in finishing feedlot.

Avaliação da vinhaça líquida em substituição à água na terminação de bovinos em confinamento. 1. Desempenho

During 90 days 243 finishing feedlot animals from two genetic groups, were weighed every 28 days in a randomized experimental procedure in a 2 x 3 factorial arrangement, with two breeds - Nelore (Nel) and Canchim (Can) - and three treatments: water (A), cane stillage + magnesium oxide (V) and cane stillage + magnesium oxide + sodium bicarbonate (V + B). The diet for all treatments was composed of 70% of corn silage and 30% of chopped sugar cane ad libitum plus 1 kg of ground corn and 1,5 kg of soluble yeast per animal. Results showed higher weight gain (P < 0,01) of the Can group relation to those of Nel, having respectively 1,35 and 1,22 kg/head/day. Both Can and Nel groups showed higher weight gain (P <.01) when fed with V + B, with 1,44 and 1,32 kg/head/day respectively when comparing to the other diets: Can (A) = 1,30; Can (V) = 1,31; Nel (A) = 1,16 and Nel (V) = 1,20 kg/head/day. The diet using V + B has also showed a tendency (.05

Synthesis, characterization and thermal studies of alkaline earth glycolate, except beryllium and radium

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Controle da porosidade e das características ácido-base de óxidos mistos derivados da hidrotalcita para aplicação em catálise

Pós-graduação em Química - IQ

Effects of different coagulants on sweet sorghum juice clarification

Sweet sorghum is a potential complementary crop for ethanol production in Brazil, United States and India. Since, phenols are playing inhibitory role in the process of ethanol production from extracted juice from sweet sorghum stalks, it's removal from juice is necessary for better ethanol yield. The aim of this research was to evaluate the use of magnesium oxide and calcium hydroxide as coagulant agents in different pH levels in the juice treatment. The experiment was arranged in a split-plot statistical design. Main treatments corresponded to the different coagulants and secondary treatments were the pH levels (6.0 and 7.0). Analysis of coagulant volume, juice pH, settling rate and sludge volume were performed during the decantation process. Clarified juice was analyzed as Brix, pH, ashes, phenolic compounds and starch. The use of magnesium oxide resulted in lower sludge volume, phenolic compounds and ashes. The use of calcium hydroxide decreased starch content, whereas clarification at pH 7.0 promoted higher sludge volume. Treating juice with magnesium oxide improved decantation dynamics of the process and clarified juice quality.

Thermal study and characterization of nicotinates of some alkaline earth metals using TG-DSC-FTIR and DSC-system photovisual

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Usinagem do alumínio da classe 6005 com uso de ferramenta cerâmica

The machining process is so much important in the economic world. Many machining parameters have been studied to maximize results, in terms of cost and lifetime. (decrease of cutting tool wear, improved surface finish, among others). The objective of this study is to evaluate the wear of a ceramic tool in the machining of the aluminum alloy 6005 A. The analysis of the wear of the cutting tools is very important due to its big impact on the final finishing of the piece as a whole. The evaluation took place in two stages, first it was done a detailed study of the literature of the whole machining process, where the study of the formation and swarf classification were among the most important steps in this phase. The second step consisted in the machining of the piece of aluminum 6005 A with a ceramic cutting tool constituded of aluminum oxide and magnesium oxide with silicon carbide impregnation. The swarf generated in this process was then photographed with a Zeiss optical microscope and analyzed for its size and shape. Through this comparison it was concluded that the swarf are generated shear swarfs, shaped like a tangled, fragmented and arcs connected, thus classifying the material as medium difficulty machining. Through the image analysis tool it was concluded that the parameter of lower wear was the: Vc = 500m / min, f = 0.10mm / rev and ap = 0.5mm