Abstract
The proximate composition, mineral contents and fatty acid composition of different parts (peel, pulp and seeds) of seven tropical fruits were evaluated. Beyond that, this study aims to evaluate the effect of drying processing on peels. Pulp and peel showed highest moisture values (65.7-93.3%), while the seed ranged from 5.8 to 67.2%. The drying processing of peels decreased moisture values (2.3-18.7%). Furthermore, drying processing did not affect ash contents, total crude protein, lipids and fiber values and fatty acid composition for avocado, pineapple, banana, papaya, passion fruit, watermelon and melon. A wide range of mineral contents was noted in different parts of fruit and calcium and potassium were found in larger quantities (25.4 to 4808 mg per 100 g). The fruits exhibited essential fatty acids as omega-6 and omega-3 with the largest contents observed in the peels and seeds (31.4 to 1970 mg per 100 g).
Highlights
Fruit consumption has increased worldwide because of taste, disease prevention and health benefits due to the presence of nutrients such as vitamins, minerals, fiber and other bioactive compounds needed by the human body for a healthy life.[1,2,3] the increase in consumption of these fruits implies an increment in the volume of waste generated, especially peels and seeds
The aim of this work was to evaluate the nutritional composition of fruit pulp, raw peel, oven dried peel, freeze dried peel, and seed of avocado, pineapple, banana, papaya, passion fruit, watermelon and melon
Malacrida et al.[31] evaluated lipid profile of papaya seeds and reported that 18:1n-9 (71.30%), 16:0 (16.16%), 18:2n-6 (6.06%) and 18:0 (4.73%) were the major fatty acids (FA) similar to the results shown by Table 3
Summary
Fruit consumption has increased worldwide because of taste, disease prevention and health benefits due to the presence of nutrients such as vitamins, minerals, fiber and other bioactive compounds needed by the human body for a healthy life.[1,2,3] the increase in consumption of these fruits implies an increment in the volume of waste generated, especially peels and seeds. Byproducts (peel and seed) from different fruits can be important sources for valuable chemicals.[4]. According to the related literature,[4,5,6] peels and seeds can present higher nutrient contents than pulp fruits. The peels are highly perishable, mainly due to the large amount of water in their composition. Different drying techniques such as air circulation oven[6] and freeze drying can be applied in fruit peels to delay perishing
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