No abstract

OBJETIVO: Investigar a prevalência de uso e o conhecimento sobre anticoncepção de emergência (AE) de mulheres universitárias de duas instituições de ensino superior. MÉTODOS: Estudo transversal com 1.740 graduandas na cidade de Santa Maria (RS), no período de maio a outubro de 2017. As informações foram coletadas por meio de questionário semiestruturado e autoaplicável de 24 questões. As variáveis investigadas foram agrupadas em características sociodemográficas, comportamento sexual e conhecimento da AE. Utilizou-se regressão logística para a análise univariada e multivariada, considerando variáveis que apresentaram p < 0,05. O modelo foi ajustado pelo teste de Hosmer-Lemeshow. RESULTADOS: A prevalência de uso da AE entre as graduandas foi de 52,9%. Contudo, apenas 11,9% das entrevistadas receberam orientação sobre a AE, principalmente no que se refere ao modo de uso. Apenas 0,2% das participantes marcou 120 horas como tempo máximo de uso, e 25,7% consideraram a AE abortiva. Houve associação entre uso da AE e idade da primeira relação sexual. CONCLUSÃO: Constatou-se alta prevalência de uso da AE entre mulheres universitárias, no entanto, ainda existem diversas lacunas no conhecimento sobre o método, o que demonstra a importância de se discutir esse assunto mais precocemente e planejar ações de caráter informativo.

Using statistical optimization, we enhanced the activity of phytase by a new Saccharomyces cerevisiae strain cultured in mineral medium. Concentrations of carbon source and inducer of phytase production were optimized using a 22 full factorial CCD and response surface methodology (RSM). Urea was fixed as nitrogen source in culture medium (0.15%, w/v). The culture medium consisting of 2.5% sucrose and 0.5% sodium phytate optimally supported the maximum phytase activity. In addition, we found that culture of the yeast at 35°C with shaking at 150 rpm supports maximum phytase production. The validity of this model was verified by culturing the organisms in flasks on a shaker. Using the optimized media and growth conditions, we obtained a 10-fold improvement in the production of phytase by S. cerevisiae.

This study aimed to obtain passion fruit peel flour and incorporate it as an ingredient in the development of dietary cookies. Drying proceeded by an experimental design with variable temperature and time and storage trial of the obtained flour was conducted in plastic packaging under optimized conditions (90 ℃/11 h) for 90 days. The passion fruit peel flour was incorporated into cookies at three levels (10, 20, and 30%) to replace wheat flour. Chemical composition, microbiological quality, and acceptance of sensory attributes of the cookies were determined. The formulations tested had significantly higher mean contents of ash and crude fiber (p < 0.05) and showed adjusted microbiological standards. Acceptance of the appearance, aroma, and flavor attributes were similar (p > 0.05) in all formulations. The results show the viability of optimized production of alternative flour (30% of passion fruit peel flour) from agro-industrial waste and the potential of the flour as an ingredient for the nutritional enrichment of dietary foods.

Sorghum is a cereal used as a food source by humans and animals. However, it presents antinutritional factors such as tannins and phytic acid, compounds that form complexes with proteins and minerals, respectively, decreasing sorghum's digestive value. The purpose of this study was to apply tannase and phytase to sorghum and evaluate the effect on tannins and phytate level and the effect of the enzymatic treatment on Wistar rats. Tannin sorghum was treated with tannase and phytase, the effect of this treatment was measured in a study with rats, a group received a diet with raw sorghum and the other one a diet with treated sorghum. The enzymatic treatment was effective in reducing tannins and promoting the increase of inorganic phosphorus. The biological assay showed that the enzymatically treated sorghum was better than raw sorghum in the apparent digestibility of phosphorus, in the level of glucose, cholesterol and triacylglycerol. Treatment of the sorghum also resulted in lower activity of the enzymes aspartate aminotransferase and alanine aminotransferase in rat serum. The enzymatic treatment of sorghum could improve the nutritional value of this cereal while also decreasing environmental pollution.