Effect of Food Processing on Flavanols

Yıl 2013, Cilt: 11 Sayı: 2, 70 - 79, 01.06.2013

Zeynep Aksoylu Sibel Karakaya

Öz

The strong correlation between dietary habits and some chronic diseases have been reported in numerous studies. In recent years, compounds with functional properties that provide specific health benefits to human have become popular. Flavanols, a subgroup of phenolic compounds, are generally found in green tea, cocoa, coffee, red grapes and apples. These monomeric bioactives are known as potent antioxidants. During various food processes these compounds expose to certain thermal or mechanical treatments and biochemical reactions. All of these applications lead to reversible/irreversible alterations in the structure of flavanols. Mainly the conversions affect appearance and sensorial characteristics of foods. On the other hand, bioavailability of flavanols is also influenced depending on structural changes of monomeric units. In this review, the effect of prominent processing techniques on flavanol contents of several foods is discussed

Anahtar Kelimeler

Catechin, Fermentation, Thermal treatment, Non-thermal treatment

Gıda İşlemenin Flavanoller Üzerine Etkileri

Öz

Sağlık üzerine belirli yararlar sağlayan fonksiyonel özelliklere sahip bileşikler son yıllarda popüler hale gelmiştir. Fenolik bileşiklerin bir alt grubu olan flavanoller genellikle yeşil çay, kakao, kahve, kırmızı üzüm ve elmada bulunmaktadır. Bu monomerik biyoaktifler güçlü antioksidanlar olarak bilinmektedir. Çeşitli gıda işlemleri sırasında bu bileşikler bazı ısıl veya mekaniksel uygulamalara ve biyokimyasal tepkimelere maruz kalmaktadır. Bu uygulamaların tümü flavanollerin yapısında geri dönüşümlü/geri dönüşümsüz değişimlere yol açmaktadır. Değişimler esas olarak gıdaların görünüşünü ve duyusal özelliklerini etkilemektedir. Diğer yandan flavanollerin biyoyararlılığı da monomerik birimlerdeki yapısal değişimlere bağlı olarak etkilenmektedir. Bu derlemede önemli gıda işleme yöntemlerinin, çeşitli gıdaların flavanol içeriği üzerine etkileri ele alınmıştır

Anahtar Kelimeler

Kateşin, Fermantasyon, Isıl işlem, Isıl olmayan işlem

Kaynakça

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