Características morfogenéticas e taxa de acúmulo de forragem do Capim-Mombaça submetido a três intervalos de pastejo.

O objetivo deste trabalho foi avaliar características morfogenéticas e a taxa de acúmulo de forragem em pastos de capim-Mombaça submetidos a três intervalos de pastejo (28, 38 e 48 dias) entre outubro de 1995 e setembro de 1996. O delineamento experimentalfoi o de blocos completos ao acaso com arranjo em parcelas subdivididas no tempo. Foram avaliadas as taxas de alongamento e senescênciafoliar, a taxa de alongamento das hastes, a densidade populacional de perfilhos e a altura do pasto. Essas informações permitiram estimara taxa de acúmulo líquido de matéria seca. A taxa de alongamento de hastes e folhas seguiu comportamento estacional, sendo mais elevadanos meses de maior temperatura e precipitação. A taxa de senescência foliar foi maior com 48 dias de intervalo de pastejo e praticamentenula entre maio e setembro. O cultivar Mombaça deve ser pastejado com, aproximadamente, 28 dias no período de outubro a maio e 48dias entre maio e setembro. O manejo do capim-Mombaça não pode ser orientado apenas pelos valores de taxa de acúmulo de matériaseca, sendo necessários estudos sobre as perdas de pastejo e sobre os efeitos da presença das hastes na eficiência de pastejo, consumoe qualidade de forragem, a fim de se determinar melhor o manejo deste capim

Recuperação de pastagens degradadas para sistemas intensivos de produção de bovinos.

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Correlação do solo e fertilização de pastagens em sistemas intensivos de produção de leite.

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Correção do solo e fertilização de pastagens em sistemas intensivos de produção de leite

bitstream/item/33154/1/Documentos86.pdfMetas 200

GRB 970228 Within the EMBH Model

We consider the gamma-ray burst of 1997 February 28 (GRB 970228) within the ElectroMagnetic Black Hole (EMBH) model. We first determine the value of the two free parameters that characterize energetically the GRB phenomenon in the EMBH model, that is to say the dyadosphere energy, $E_{dya}=5.1\times10^{52}$ ergs, and the baryonic remnant mass $M_{B}$ in units of $E_{dya}$, $B=M_{B}c^{2}/E_{dya}=3.0\times10^{-3}$. Having in this way estimated the energy emitted during the beam-target phase, we evaluate the role of the InterStellar Medium (ISM) number density (n$_{ISM}$) and of the ratio ${\cal R}$ between the effective emitting area and the total surface area of the GRB source, in reproducing the observed profiles of the GRB 970228 prompt emission and X-ray (2-10 keV energy band) afterglow. The importance of the ISM distribution three-dimensional treatment around the central black hole is also stressed in this analysis.Comment: 4 pages, 1 figure, to appear in the Proceedings of the Los Alamos "Gamma Ray Burst Symposium" in Santa Fe, New Mexico, September 8-12 2003 (AIP Conf. Ser.), CHAPTER: GRB Connection to Supernova

Pastagens irrigadas.

Pastagens irrigadas; Disponibilidade de água para irrigação; Irrigação de pastagens nos sistemas de produção; Qualidade da forragem irrigada ao londo do ano e desempenho animal; Eficiência de uso da forragem com altas massas de forragem; Planejamento de sistemas irrigados; Análise econômica

Consumers’ reactions to nutrition and ingredient labelling for wine – A cross-country discrete choice experiment

The purpose of this study is to examine consumers' reactions to the introduction of nutrition and ingredient labelling for wine, a product that is so far still exempt from mandatory nutrition and ingredient labelling. It also analyses the effect of positive and negative information about the use of ingredients in wine on consumers' choice. Representative samples for wine consumers from three distinctly different countries representing old and new wine markets (Australia, n = 745; Germany, n = 716; Italy, n = 715) completed a discrete choice experiment (DCE) with graphically simulated wine back labels. For each country, respondents were randomly allocated to a reference group and two different treatment conditions where they received newspaper-like information (positive, negative) before making choices. Results for the reference condition show that consumers across all three countries have a significant positive utility for detailed nutrition information. Instead, ingredient information only receives a positive utility in Italy, whereas German and Australian respondents do not receive utility from ingredient labelling. When consumers in the treatment group are confronted with negative media information the attribute importance of ingredients significantly increases across all three countries, clean labelled products without ingredients are preferred, and a significantly higher share of consumers in Germany and Italy prefer not to buy any wine. The treatment effect of positive media information on consumers’ wine choice is lower than that of negative information. The results of the study have implications for the pending new regulation of wine labelling and for communication strategies of the wine industry that should actively inform consumers about the necessity of ingredients in wine production

Tympano-mastoid cholesterol granuloma: case report and review of the literature

Cholesterol granuloma (CG) is a rare condition histological consisting of a foreign body, giant cell reaction to cholesterol crystals and haemosiderin derived from the ruptured of the erythrocytes. A 25-year-old man came to our Department presenting signs and symptoms of tympano-mastoid cholesterol granuloma. He showed all the specific sign and symptoms of the disease. However, considering the lack of literature regarding TMCG, this study was performed with the aim of presenting the main characteristics of tympano-mastoid CG, describing the case report and reviewing the literature