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und seeds. The oil has low saturated fatty acid content and high level of linoleic acid. This oil has pleasant avor and is stable when used as frying oil (. Grape seed is potential source of protein. However, it is important to remove polyphenols from the protein to improve its digestibility. Fantozzi ( described processfor production of protein concentrate having improved protein digestibility. The processinvolves soaking whole seeds in an alkaline solution to extract polyphenols, drying and milling the seeds, than extracting the protein with 2% sodium chloride. The extract is acidied to pH 4 to precipitate the protein, which is recovered by centrifugation. Theprecipitated protein is desalted by dialysis and dried. 2.5 Mango Mango ( Mangifera indica .) is one of the most important tropical fruits. The world pro- duction of mangoes during 1 was 2 million tonnes; India had share of 5% (. The other major mango producing countries are China and Mexico (Table . Even though mango is highly valued as table fruit, substantial quantities of fruits are processed. Ripe mangoes are processed into () frozen mango products, () cannedproducts, () dehydrated products, and () ready-to-serve beverages (. During the man- ufacture of mango products large quantities of waste are generated; they account for 3% 5% of the fruit (, depending on the variety. Actual gures on the quantity of mango waste generated commercially are not readily available. However, rough estimate of the waste available annually in India alone based on the quantities of mango processed (0.2 million tonne) is of the order of 9,0 tonnes. Mango pulp, which is the most important seminished product of mangoes, is ex- tracted commercially by feeding the mangoes after washing and cutting into pulper tted with ne cylindrical sieve with approximately 0.8-mm-diameter opening. During the Table 4 Major Mango Producing Countries Production ( Country (1 MT) India 1,0 China 2,1Mexico 1,4 Indonesia 1,1 Pa