OIL CONTENT IN THE SEEDS OF WINE GRAPE VARIETIES IN THE REPUBLIC OF MACEDONIA

Abstract

Modern studies worldwide suggest a high nutritional and medicinal value of the grape seeds. Oil for human consumption produced from the grape seed is already in everyday use in the diet in the economically developed countries. Seeds are also characterized by a rich composition of phenolic substances from which supplements recommended for cardiovascular system improvement are produced. Recent studies indicate the possibility of their use in the treatment of cancer. Grape seeds are not used for these purposes in the Republic of Macedonia. We tested two varieties that are most widely cultivated in the Republic of Macedonia, the red wine variety, Vranec and the white wine variety, Smederevka. Grapes were collected from two regions, Kavadarci and Valandovo, regions that are most important for the production of these two varieties. All tests were carried out in three repetitions. The mechanical and chemical composition of the grapes were analysed following the OIV (International Organisation of Vine and Wine) methods. We used statistical analysis of the
completely randomized design. We detected rich chemical composition in the seeds, which indicates the great seed use value of the tested varieties.