YABAN MERSİNİ (Blue berry) VE KURT ÜZÜMÜ (Gojiberry) EKSTRAKTLARIYLA ZENGİNLEŞTİRİLMİŞ KİTOSAN ile KAPLANMIŞ GÖKKUŞAĞI ALABALIK (Onchorhynchus mykiss WALBAUM 1792) FİLETOLARININ PİYASA KOŞULLARINDA MİKROBİYOLOJİK DEĞİŞİMLERİNİN İNCELENMESİ

Yıl 2018, Cilt: 13 Sayı: 4, 171 - 181, 14.10.2018

Ayşe Gürel İnanlı , Özlem Emir Çoban , Songül Yüce , Burcu Çelik

Öz

Çalışma, yaban mersini
ve kurt üzümü ekstraktları ilaveli kitosan kaplamanın, gökkuşağı alabalığı
filetolarında mikrobiyel gelişmeyi önleyebilmek ya da kontrol altına alabilmek
için ne kadar etkili olduğunu belirlemek amacıyla yapılmıştır. Filetolar, normal,
kitosan kaplı, yaban mersini ekstraktı ilaveli kitosan kaplı, kurt üzümü
ekstraktı ilaveli kitosan kaplı olmak üzere toplam 4 deneysel grup olarak
strafor paketler içerisinde +8 °C’de muhafazaya alınmıştır. Muhafazadaki
örneklerin 3 günde bir mezofil aerob bakteri, psikrofil aerob bakteri, maya-küf
ve Enterobakteriaceae bakteri
sayımları yapılmıştır. Çalışmada belirlenen TMAB sayısı tüm gruplarda ise 6.
günde kabul edilebilir limit değerini aşmıştır. TPAB sayıları tüm gruplarda
muhafaza süresince zamana bağlı olarak artmıştır. Depolama sonunda maya-küf
sayıları, en yüksek kontrol grubunda 5,14±0,12 log kob/g, en düşük kurt üzümü
ilaveli kitosanla kaplanmış grubta 3,74±0,19 log kob/g olarak belirlenmiştir. Çalışmadaki
örneklerde Enterobacteriaceae bakteri
sayısı en yüksek 6. günde kontrol grubunda (5,28±0,22 log kob/g) saptanmıştır. Sonuç
olarak; kitosan ve bikki ekstaktı ilaveli kitosan kaplamaların filetoların
mikrobiyolojik nitelikleri üzerinde olumlu etkisinin olduğu kanaatine
varılmıştır. 

Anahtar Kelimeler

Kitosan, Oncorhynchus mykiss, Yaban Mersini, Kurt Üzümü, Mikrobiyolojik Değişim

Kaynakça

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