Produced water irrigation changes the soil mesofauna community in a semiarid agroecosystem.

The scarcity of water in semiarid regions requires alternative sources for irrigation to improve agricultural production. Here, we aimed to evaluate the effects of produced water from oil exploration on the structure of soil mesofauna during the dry and rainy seasons in irrigated sunflower and castor bean fields in a Brazilian semiarid region. Three irrigation treatments were applied on plots cultivated with castor beans and sunflowers: produced water treated by filtration (filtrated) or treated by reverse osmosis (reverse osmosis) and groundwater. The mesofauna under the biofuel crops was collected and identified during the dry and rainy seasons. Although the abundance and richness of the total fauna did not differ between seasons in sunflower plots, the community was altered. In castor beans, the abundance, richness, and community of mesofauna observed in plots irrigated with produced water differed from the groundwater treatment. Irrigation with produced water promotes important changes in soil fauna community that justify their assessment for the maintenance and monitoring of agroecosystems.

Composição mineral de bebida mista a base de água de coco e suco de caju clarificado / Mineral composition of mixed drink composed of coconut water and clarified cashew apple juice

Este trabalho teve como objetivo quantificar os minerais (K, Na, Mn, Cu, Fe, Ca e Mg) presentes em bebida mista, levemente estimulante, formulada com água-de-coco e suco de caju clarificado, adicionada de cafeína. Também avaliou-se a contribuição de seus constituintes (água de coco/cafeína) para a composição mineral final do produto. Os resultados demonstraram elevada concentração de potássio na bebida. O conteúdo de sódio, bem como dos outros minerais encontrados (Ca, Mg, Fe, Mn e Zn) foi influenciado pela formulação e pela presença de aditivos. A composição mineral da bebida preservou parte dos componentes encontrados nas matérias-primas e mostrou-se dependente da composição de seus constituintes