Grape pomace is a by-product of the beverage industry. In this study, composition, hydration, oil holding, thermal, and some technological properties, in addition to the colour values of grape pomace with particles larger than 595 μm, 298-595 μm, 150-297 μm, 149-106 μm, 75-105 μm and smaller than 74 μm were found to be different. In the sample with particles larger than 595 μm, ash, crude fat, carbohydrate content, sediment volume fraction in water and oil, pH, thermal diffusivity, and colour lightness (L) were measured higher than in the other samples. The water holding capacity, absorption index, oil holding capacity, and swelling power in oil were the highest in samples with 150-297 µm particle size. Moisture, crude protein content, solubility index, swelling power in the water, bulk and packed density, water activity, brix, refractive index, thermal conductivity, specific heat, redness (a), yellowness (b) and colour difference (∆E) properties were determined to be the highest in samples with particle sizes smaller than 74 µm.
Üzüm posası, içecek endüstrisinin bir yan ürünüdür. Bu çalışmada 595 μm’den büyük, 298-595 μm, 150-297 μm, 149-106 μm, 75-105 μm ve 74 μm’den küçük partiküle sahip üzüm posasının kompozisyon, hidrasyon, yağ tutma, termal ve bazı teknolojik özellikleri ile renk değerlerinin farklı olduğu bulunmuştur. 595 μm’den büyük partiküllü örneklerde kül, ham yağ, karbonhidrat içeriği, suda ve yağda çökelti hacim fraksiyonu, pH, ısıl yayılma ve renkte açıklık (L) değeri diğer örneklerden yüksek ölçülmüştür. Su tutma kapasitesi, su absorpsiyon indeksi, yağ tutma kapasitesi, yağda şişme gücü ise 150-297 µm partikül büyüklüğüne sahip örneklerde en yüksek olarak bulunmuştur. Nem, ham protein içeriği, çözünürlük indeksi, suda şişme gücü, hacimsel ve sıkıştırılmış yoğunluk, su aktivitesi, briks, refraktif indeks, ısıl iletkenlik, özgül ısı, kırmızılık (a), sarılık (b) ve renk farklılığı (∆E) özellikleri ise 74 µm’den küçük partiküllü örneklerde en yüksek olarak belirlenmiştir.
Primary Language | Turkish |
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Subjects | Food Engineering |
Journal Section | Research Articles |
Authors | |
Early Pub Date | December 21, 2023 |
Publication Date | January 3, 2024 |
Submission Date | August 1, 2023 |
Published in Issue | Year 2024Volume: 10 Issue: 1 |
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