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KİTOSAN KAPLAMANIN SOĞUTULARAK SAKLANAN ETLERİN MİKROBİYOLOJİK VE OKSİDATİF ÖZELLİKLERİNE ETKİSİNİN BELİRLENMESİ

Sığır eti, zengin besin içeriğinden dolayı bozulmaya duyarlı ve kısa raf ömrüne sahip bir gıdadır. Bu nedenle, sığır etinin raf ömrünün artırılması için birçok çalışma yapılmaktadır. Bu çalışmaların ise önemli bir kısmı yenilebilir film kaplamalar üzerine yoğunlaşmıştır. Bu çalışmada, kitosan film kullanılarak sığır etinin raf ömrünün uzatılması amaçlanmıştır. Bu amaçla, çalışmada kullanılan sığır eti kitosanla kaplanmış ve + 4 ºC'de buzdolabında saklanmıştır. Toplam mezofilik aerobik bakteri sayımı (TMAB), Stapylococcus aureus, Pseudomonas spp. ve tiyobarbitürik asit (TBARS) sayısı analizleri yapılmıştır. Sonuç olarak, kitosan kaplamanın TMAB, Pseudomonas spp. ve TBARS sayısını düşürdüğü tespit edilmiştir (p <0.05). Ayrıca, kitosan depolamanın 5. gününde tüm S. aureus 'u inhibe etmiştir. Nitekim bu çalışmadan elde edilen verilere göre kitosanın antimikrobiyal ve antioksidan özelliklerinden dolayı et endüstrisinde biyo-koruyucu olarak kullanılabileceği sonucuna varılmıştır.

Anahtar Kelimeler:

Kırmızı et, kitosan, kaplama, Staphylococcus aureus, Pseudomonas spp, Thiobarbituric acid (TBA)

EVALUATION OF THE EFFECT OF CHITOSAN COATING ON MICROBIOLOGICAL AND OXIDATIVE PROPERTIES OF REFRIGERATED BEEF

Beef is an animal food sensitive to deterioration with short shelf-life due to its rich nutrient content. Many studies concerned with the use of edible coating are carried out to increase the shelf life of beef. In this study, it was aimed to extend the shelf life of beef using chitosan. For this purpose, the bovine meat was coated with chitosan and stored at +4 ºC for 7 days. Total mesophilic aerobic bacteria, Stapylococcus aureus, Pseudomonas spp. counts and thiobarbituric acid values were analyzed. As a result, it was found that the chitosan coating reduced the TMAB, Pseudomonas spp. counts and TBARS values (P < 0.05) and inhibited all S. aureus up to day 5 of storage. According to the data obtained from this study, it has been concluded that chitosan can be used as a bio-preservative in the meat industry due to the antimicrobial and antioxidantive properties.

Keywords:

Beef, chitosan, coating, Staphylococcus aureus, Pseudomonas spp, Thiobarbituric acid (TBA),

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