Michael J. Guerra

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Early surgical repair of severe mitral valve regurgitation in symptomatic and asymptomatic patients is associated with better long-term outcomes than watchful waiting. This article describes an asymptomatic, 23-year-old man whose significant cardiac murmur (later confirmed to be mitral regurgitation) was found during a routine examination for a prescription(More)
Sesame press cake represents an important potential protein source for human consumption. Some of the limiting factors are its high crude fiber content, oxalic acid content, and its bitter taste. By fractionation of solvent-extracted sesame meal, several preparations were obtained which were analyzed for their nutrient content, protein utilization and(More)
The nutritional value and proximate chemical composition of five samples of rice bran taken from different varieties of rice grown in Venezuela was studied. Thiamin, niacin, riboflavin and tryptophan, lysine, methionine and cystine were analyzed. The apparent protein digestibility was between 59 an 74%, and the Protein Efficiency Ratio (PER) between 1.19(More)
The purpose of this work was the production of a beverage with a nutritive value similar to that of milk, but available at a lower cost. A traditional beverage in Venezuela, "Chicha de Arroz" (Rice Chicha), was chosen. The various formulas studied were based on rice, non-fat milk and different kinds of soy flour, in addition to sugar, vegetable oil,(More)
Unhusked corn and soy grits were used as raw material, with a particle size ranging between 10 and 20 mesh (ASTM). The results obtained in this study reveal that microwave heating is effective in destroying the antinutritional factors present in soybeans. The trypsin inhibitor activity, in effect, was reduced to a 76% inactivation. The hemagglutinating(More)
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