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

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. 

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