Erbil bölgesinde geleneksel yöntemlerle siyah kuru üzümden üretilen meyve sularının bazı özellikleri ve depolama süresince meydana gelen değişimler

Year 2023, Volume: 27 Issue: 3, 424 - 434, 27.09.2023

Soz Dildar Majeed , İbrahim Hayoğlu , Ahmet Sabri Ünsal

https://doi.org/10.29050/harranziraat.1323474

Cited By: 1

Abstract

Üzüm (Vitis vinifera) Irak'ta en çok yetiştirilen meyvelerden biri olup farklı şekillerde değerlendirilmektedir. Bu çalışmada geleneksel olarak Erbil yöresinde kuru siyah üzümlerden üretilerek doğrudan tüketilen meyve suyunun bazı özelliklerinin belirlenmesi ve çeşitli yöntemlerle dayanıklı hale getirilmesi yanında depolanması sırasında ortaya çıkabilecek değişikliklerin incelenmesi amaçlanmıştır. Bu amaçla üzüm sularının bir kısmı pastörize edilerek, diğer kısmı da Na-benzoat kullanılarak 500 ml'lik şişelerde, oda sıcaklığında, karanlık ve aydınlık koşullarda 6 ay depolanmıştır. Depolanan ürünlerde periyodik olarak pH, asitlik, toplam kuru madde, çözünür kuru madde, kül, renk, toplam antioksidan (DPPH), HMF, esmerleşme ve toplam fenolik madde (folin-ciocalteu) analizleri yanında duyusal değerlendirmeler yapılmıştır. Yapılan istatistiksel değerlendirmeler sonucunda; renk bakımından uygulamalar arasında bir fark olmadığı, ancak depolama süresine bağlı olarak özellikle L değerinde 4. aydan sonra az da olsa bir azalma olduğu, Hydroxymethylfurfural (HMF) ve esmerleşme düzeyleri bakımından pastörize örnekler daha yüksek değerler verirken, 2. Aydan sonra esmerleşme düzeylerinin tüm örneklerde belirgin şekilde arttığı ve TFM (toplam fenolik madde) değerlerinde bir azalma olduğu görülmüştür. Duyusal özellikler açısından tüm ürünlerin çok beğenildiği, pastörize edilin örneklerin daha fazla beğeni aldığı, depolama süresinin örneklerin duyusal özellikleri üzerine önemli bir etkiye sahip olmadığı tespit edilmiştir. Ayrıca içeceklerin koruyucu ilavesiyle veya koruyucu ilave edilmeden sadece pastörizasyon işlemi ile oda sıcaklığında uzun süre depolanabileceği ve böyle bir ürünün talep göreceği belirlenmiştir.

Keywords

Üzüm, Depolama, Fenolik bileşikler, Antioksidan, Meyve suyu

Supporting Institution

Harran Üniversitesi (HÜBAK)

Project Number

20095

Some properties of fruit juice produced by black raisins by traditional methods in Erbil region and changes during storage

Abstract

Grape (Vitis vinifera) is one of the most grown fruits in Iraq and is evaluated in different ways. This study aimed to determine some properties of the fruit juice that is traditionally produced from dried black grapes in the Erbil region and consumed directly, to make it durable by various methods, as well as to examine the changes that may occur during storage. For this purpose, some of the grape juices were pasteurized and the other part was stored using Na-benzoate in 500 ml glass bottles, at room temperature, under dark and light conditions for 6 months. In the stored products, pH, acidity, total dry matter, soluble dry matter, ash, color, total antioxidant (DPPH), Hydroxymethylfurfural (HMF) and browning reaction and total phenolic substance (folin-ciocalteu) analyzes as well as sensory evaluations were made periodically. As a result of the statistical evaluations, There is no difference between the applications in terms of color, but there is a slight decrease in the L value after the 4th month, depending on the storage period, while the pasteurized samples show higher values in terms of HMF and browning levels, the browning levels increase significantly in all samples after the 2nd month, and TFM values were decreased. It has been determined that all products are highly appreciated in terms of sensory properties, pasteurized samples are more appreciated, and the storage time does not have a significant effect on the sensory properties of the samples. In addition, it has been determined that beverages can be easily stored for a long time at room temperature with or without the addition of preservatives, only by pasteurization, and such a product will be in demand.

Keywords

Grape, Storage, Phenolic compounds, Antioxidant, Juice

Project Number

20095

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