Ebru ŞANLI, Asuman GÜRSEL, Tuba ŞANLI, Filiz YILDIZ, Mehlika BENLİ

AZ YAĞLI KAŞAR PEYNİRİ ÜRETİMİNDE EKZOPOLİSAKKARİT ÜRETEN KÜLTÜR KULLANIMI ÜZERİNE BİR ARAŞTIRMA

Bu çalışmada, ekzopolisakkarit üretme yeteneğine sahip (EPS+) bakterileri içeren starter kültürün az yağlı Kaşar peynirinin bazı nitelikleri üzerine etkileri araştırılmıştır. Bu amaçla, EPS+ kültürün %0.5 ve 1.0 oranlarında kullanılarak üretildiği kurumaddede %20 yağ içeren EPS+0.5 ve EPS+1.0, kurumaddede %20 yağ içeren kontrol (K20) ve kurumaddede %40 yağ içeren kontrol (K40) olmak üzere toplam 4 peynir örneği üretilmiştir. Örnekler 4±1ºC’de 90 gün süreyle olgunlaşmaya bırakılmış ve olgunlaşmanın 1., 15., 30., 60. ve 90. günlerinde kimyasal, fiziksel, duyusal ve mikrosrüktürel nitelikleri yönünden değerlendirilmiştir. Peynir örneklerinin SEM görüntüleri incelendiğinde, EPS+ kültür kullanımı ile az yağlı peynir örneklerinin pıhtı yapısında iyileşme sağlanarak kurumadde %40 yağlı kontrol peynirinin tekstürüne yakın bir tekstür elde edilebileceği görülmüştür. Ancak, starter kültür kullanım oranındaki artışla birlikte artan nem içeriğine bağlı olarak peynir örneklerinde tat ve yapı kusurlarının ortaya çıktığı ve EPS+ kültürün %1.0 oranında ilave edildiği az yağlı peynir örneğinin %0.5 EPS+ kültür ilaveli örnekten daha az beğenildiği belirlenmiştir.

Anahtar Kelimeler:

Ekzopolisakkarit üreten starter kültür, Kaşar peyniri, Az yağlı peynir

A STUDY ON USING EXOPOLYSACCHARIDE-PRODUCING CULTURE IN LOW FAT KASAR CHEESE

In this study, the impacts of an exopolysaccharide-producing (EPS+) starter culture on some quality characteristics of low fat Kasar cheese samples were investigated. For this purpose, four cheese samples were manufactured: cheeses containing 20% fat-in-dry matter with added 0.5% EPS+ and 1.0% EPS+ culture (EPS+0.5 and EPS+1.0), control cheese containing 20% fat-in dry matter (K20) and control cheese containing 40% fat-in-dry matter (K40). The samples were allowed to ripening for 90 days at 4 ± 1 °C and were evaluated for chemical, physical, sensory and microstructure qualities on the 1st, 15th, 30th, 60th and 90th days of ripening. SEM images showed that textural characteristics of low-fat cheese samples could be improved by using EPS+ starter culture and of which had similar texture to the control cheese with 40% fat-in-dry matter. However, it was determined that defects in body and flavor became definite with an excessive increase in moisture level and the cheese with 1.0% EPS+ culture preferred less than the cheese with 0.5% EPS+ culture.

Keywords:

Exopolysaccharide-producing starter culture, Kasar cheese, low fat cheese,

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