Soraya de Oliveira Sancho

Characterization of the Industrial Residues of Seven Fruits and Prospection of Their Potential Application as Food Supplements

Seven residues from tropical fruit (acerola, cashew apple, guava, mango, papaya, pineapple, and sapota) processing were prospected for physicochemical parameters (pH, total soluble solids, water activity, reducing sugar, acidity, protein, moisture, ash, and lipids), functional compounds (total phenolic content, anthocyanins, ascorbic acid, and free radical scavenging activity—DPPH), fatty acid profile, and mineral content. Prospection of these industrial residues aimed its use as potential sources for food supplementation. Acerola residue was found to be a valuable source of anthocyanins, phenolics, and vitamin C; cashew apple residue could be a source of unsaturated fatty acids; pineapple and papaya residues could be used, respectively, as manganese and phosphorous source.

Alterações químicas e físico-químicas no processamento de suco de caju (Anacardium occidentale L.)

This work aimed to study the physicochemical changes occurring in cashew apple (Anacardium occidentale L.) juice with high pulp content in various stages of the industrial process. The acidity and ascorbic acid contents were found to decrease progressively along the process, presenting their lowest values in the pasteurization stage. Folic acid content was highest in the juice homogenizing stage. Reducing and nonreducing sugars, as well as pH values remained constant throughout the process.

Spouted bed as an efficient processing for probiotic orange juice drying

This study evaluated the influence of spouted bed drying temperature and maltodextrin dextrose equivalent on the probiotic microbial survival during drying and storage period and on physicochemical properties of fermented probiotic orange juice in powder. Probiotic orange juice was spouted bed dried at 60, 70, 80 and 90°C using maltodextrin with a different dextrose equivalent (10, 20, 30 and 39). After drying, the microbial was higher when lower drying temperatures were applied. During the storage, the highest drying temperatures (80 and 90°C) negatively affected the microorganism survival. On the other hand, at the lowest drying temperature (60°C), the product presented higher Aw, what negatively affected the microbial survival during storage. The temperature of 70°C was the best to preserve the microbial viability during storage. Physicochemical parameters were improved when temperature increased and dextrose equivalent decreased.

Avaliação da metodologia microbiológica para determinação de 5-metiltetrahidrofolato em suco de caju (Anacardium occidentale L.)

Abstract Although cashew apple juice has been highly consumed in Brazil and several studies on its nutritional value have been published, no studies on the determination of folate contents in this juice were found in the literature. Several analytic techniques can be employed for the folate determination in foods. In this study, the microbiological assay using Lactobacillus casei was employed. Enzyme treatment and ultrasound waves were tested as pretreatment. The use of standards of folic acid and folate were also evaluated. The results showed that the enzyme treatment cannot be replaced by ultrasound treatment. The consumption of 200 mL of in natura cashew apple juice corresponds to a folate intake of 500 µg, which is higher than the recommended daily intake for adults. Keywords: cashew apple juice; folate; enzyme treatment; ultrasound; Lactobacillus casei. Resumo Embora o suco de caju seja bastante consumido no Brasil e muitos estudos sobre seu valor nutricional tenham sido publicados, a literatura nao reporta estudos sobre a determinacao de folatos nesse suco. Varias tecnicas analiticas podem ser utilizadas visando a deteccao da referida vitamina. Optou-se por utilizar o ensaio microbiologico oficial de determinacao de folatos em alimentos, utilizando-se