Direction of movement of late paleozoic glaciers in Angola (Western Africa)

A identificação de um pavimento de clastos intercalado entre dois diamictitos da "Série de Lutôe", Angola, constitue evidência de origem glacial dessas rochas. A orientação de estrias sobre os clastos, a disposição espacial destes no pavimento, e a orientação de clastos de diamictitos indicam que as geleiras neopaleozóicas deslocaram-se de SE-NW nesta parte da Bacia do Congo.Identification of a boulder pavement intercalated between two diamictites of the "Lutôe Series" in Angola points out for a glacial origin for these rocks. Measurement of striae on clasts, their disposition in the pavement and the fabric of diamictites indicate movement of Late Paleozoic (Gondwana) glaciers towards NW in this part of the Congo Basin

Effect of temperature on the gasification of animal fat: Preliminary results

In this work, steam reforming of animal fat was studied using a fixed bed reactor. The effect of temperature was evaluated in the range of 750 and 950°C. Gas chromatography was used to analyze the gas sample and determine the gas composition. The results showed that the temperature greatly influences the gas composition and gasification process. The gasification parameters increased with the temperature rise, and the best results were obtained at the highest tested temperature.N/

Periods Of Weed Interference In Maize Crops Cultivated In The First And Second Cycles

The interference of weeds in maize production may be reflected in grain yield losses that vary as a function of the density, stage and degree of aggressiveness of the species present. In the agricultural ecosystem, crops and weeds demand light, water, nutrients and space, which are frequently not available in sufficient quantities, leading to competition. The aim of this work was to determine the period of interference of weed plants, in particular of naked crabgrass (Digitaria nuda) on maize crop in the first and second harvest. The treatments were defined as increasing periods of coexistence and increasing control of weed community (7, 14, 21, 28, 35, 42, 49, and 56 days), two more controls, a control including one with weed control until the end of the culture cycle and another with coexistence until the harvest. For each period, were evaluated the stand of maize plants, length of ear, number of grains per row, number of rows per ear, cob, 100-grain weight, and grain productivity. The data obtained were subjected to analysis of variance using the F test, with average treatments compared using Tukey's test at 5% probability. Crop productivity was evaluated by means of regressions, the critical periods of interference were estimated. The critical timing of weed removal was 25 days for both harvests. The critical weed free period was 54 and 27 days for the first and second harvest respectively. For the conditions of the first and second harvest, the critical period of weed control was of 29 and 2 days respectively.3752867287

peouenosfrutos 17 pós-colheita Conservação de Morangos com utilização de Óleos Essenciais

Nos últimos anos, a cultura do morango tem vindo a assumir uma maior importância devido ao seu potencial de exportação e à elevada procura que se verifica, mas a sua curta vida útil dificulta a sua comercialização

TUBERCULOSE: UMA REVISÃO DE LITERATURA

A Tuberculose (TB) doença é causada pelo Mycobacterium tuberculosis, tendo as vias aéreas como principal via de transmissão, apresentando-se sob as formas clínicas pulmonar e extrapulmonar. A via de infecção tuberculosa é quase sempre inalatória. A doença acomete principalmente pessoas na faixa etária entre 20 e 49 anos. A incidência no gênero masculino normalmente é superior à do gênero feminino e, a forma pulmonar é a forma clínica da doença que mais acomete a população. O padrão para o diagnóstico da TB é a baciloscopia e cultura com a identificação da espécie. Segundo o Ministério da Saúde, o esquema básico de quimioprofilaxia para adultos e adolescentes é realizado por um período de seis meses, composto pelos seguintes medicamentos: Rifampicina (R), Isoniazida (H), Pirazinamida (Z) e Etambutol (E). De acordo com Ministério de Saúde, existem duas medidas preventivas eficazes contra a tuberculose: a vacinação e a quimioprofilaxia. A vacinação com a BCG é a medida mais comum para prevenção da TB é indicada para crianças de 0 a 4 anos de idade e a proteção imunitária pode manter-se por 10 a 15 anos. O Programa Nacional de Controle da Tuberculose é responsável pela redução das fontes de infecção, diagnóstico, tratamento e pela distribuição dos medicamentos que são fornecidos gratuitamente a todos os doentes registrados e acompanhados nas Unidades de Saúde, levando à consequente redução da incidência, prevalência e mortalidade causada pela TB.Palavras-chave: Tuberculose. M. tuberculosis. Diagnóstico. Tratamento

Energy relaxation of an excited electron gas in quantum wires: many-body electron LO-phonon coupling

We theoretically study energy relaxation via LO-phonon emission in an excited one-dimensional electron gas confined in a GaAs quantum wire structure. We find that the inclusion of phonon renormalization effects in the theory extends the LO-phonon dominated loss regime down to substantially lower temperatures. We show that a simple plasmon-pole approximation works well for this problem, and discuss implications of our results for low temperature electron heating experiments in quantum wires.Comment: 10 pages, RevTex, 4 figures included. Also available at http://www-cmg.physics.umd.edu/~lzheng