KISA SÜRELİ DEPOLAMADA ÜZÜM SUYUNUN STABİLİTESİNE FARKLI UYGULAMALARIN ETKİLERİNİN DEĞERLENDİRİLMESİ

Üzüm, dünyada üretilen en önemli tarımsal ürünlerden biridir. Yüksek miktarlarda üretilmesine rağmen depolama sırasında yaşanan bazı problemler nedeniyle meyve suyu fazla tüketilmemektedir. Asitleşme bu süreçte karşılaşılan ana sorunlardan biridir. Bu çalışmada üzüm suyunun buzdolabında kısa süreli (20 gün) saklandıktan sonra stabilitesi açısından farklı işlemler ve işleme süreleri incelenmiştir. Kırmızı ve beyaz olmak üzere iki farklı üzüm suyu bazı ana kalite kriterlerindeki değişimlere göre değerlendirilmiştir. Sonuçlar farklı konsantrasyon ve sürelerde UV-C (Ultraviyole-C) ve ultrases uygulamalarının üzüm suyunun stabilitesini önemli ölçüde etkilediğini göstermiştir. Kontrol uygulaması bazı özelliklerde daha yüksek değerlere sahip olmasına rağmen, değerler kararsızdı ve çok büyük aralıklarda değiştiği görüldü. Aksine, uygulamalar oldukça yüksek stabilite sağlamıştır. Tüm bu bilgiler ışığında UV-C ve ultrases uygulamalarının güvenilir saklama koşulları sağlaması açısından oldukça önemli olduğu değerlendirilmiştir.

EVALUATION OF DIFFERENT TREATMENTS ON STABILITY OF GRAPE JUICE IN SHORTTERM STORAGE

Grape is one of the most important crops propagated in the world. Although it is produced in high amounts, the juice isnot consumed much due to some problems during storage. Acidification is one of the main problems. In this study,different treatments and durations were studied in terms of the stability of grape juice after short-term (20 days)refrigerator storage. Two types of grape juice, red and white, were evaluated according to changes in some main qualitycriteria. The results showed that UV-C (Ultraviolet-C) and ultrasound treatments in different concentrations and durationssignificantly affected the stability of grape juice. Although control showed mostly higher amounts in some properties,they were unstable and changed in very large intervals. On the contrary, treatments provided notably high stability. Inlight of all this information, the UV-C and Ultrasound treatments were considered crucial in terms of providing muchreliable storage conditions.

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