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In this study, morphometric measurement, meat yield, moisture, pH, protein, fat, fatty acids and ash content were determined in a total of 102 (15 female and 87 male) freshwater crab (Potamon persicum Pretzmann,1962) caught from Aşağı and Yukarı Çay of Pertek, Tunceli. Meat yield in male and in female crabs were found to be as 12.75±0.38% and 10.93±0.32%, respectively. It has been observed that moisture and protein amounts were higher in female crabs than in male crabs. The amounts of fat were 0.96±0.31% in male crabs and 0.97±0.35% in female crabs. The amount of ash was 2.68±0.04% in male crabs and 2.66±0.03% in female crabs. It was determined that the content of monounsaturated fatty acids (female:male 33.56%:37.44%) in female and male crabs were higher than polyunsaturated (female:male 24.19%:21.62%) and saturated fatty acid (female:male 28.11%:32.85%) content. The highest fatty acid was found to be as omega-9, in terms of omega-3 (male crabs 8.54%, female crabs 14.85%), omega-6 (male crabs 10.04%, female crabs 5.46%) and omega-9 fatty acids (male crabs 23.65%, female crabs 19.14%) in freshwater crab (Potamon persicum Pretzmann, 1962) meat.

This study was carried out to characterize antioxidant activity, total phenolic content, and the phenolic and flavonoids profile of postbiotic of Pediococcus acidilactici and to evaluate the effects of postbiotics (10% and 50%) alone and in combination with chitosan coating (1%) on the microbial and chemical quality of chicken breast fillets during storage at 4 °C. Antioxidant activity and total phenolic content of the postbiotics were found to be 1291.02 ± 1.5 mg/L TEAC and 2336.11 ± 2.36 mg/L GAE, respectively. The most abundant phenolic was vanillic acid, followed by t-caffeic, gallic, and caftaric acids. The postbiotic-chitosan (50% + 1%) combination decreased L. monocytogenes and S. Typhimurium counts by 1.5 and 2.1 log10 CFU/g, respectively, compared to the control (P 0.05). Postbiotic treatment did not significantly change the pH values and color properties of the breast fillets (P > 0.05). Postbiotic-chitosan combinations extended the shelf-life by up to 12 days compared to the control. In conclusion, the postbiotic-chitosan combination can be used to preserve and improve the microbial quality of chicken meat products.

Bu çalışma Elazığ’da satılan 25’er adet sade, meyveli ve light ticari kefir örneklerinin bazı kalite parametrelerini belirlemek için planlandı. Kefir örneklerinin mikrobiyolojik (toplam mezofilik aerob bakteri (TMA), Lactobacillus-Leuconostoc-Pediococcus (LLP), laktik streptokoklar, koliform, proteolitik ve lipolitik bakteri, maya ve küf, Escherichia coli, Staphylococcus-Micrococcus ve koagulaz pozitif Staphylococcus aureus) ve kimyasal (pH, asitlik, yağ, kuru madde, yağsız kuru madde ve kül) analizleri yapıldı. İncelenen tüm kefir çeşitlerinin hepsinin toplam mezofil aerob (TMA) ve koliform bakteri sayısı bakımından Türk Gıda Kodeksi Fermente Süt Ürünleri Tebliği’ne uygun olduğu görüldü. Maya sayısı bakımından sade 6 (%24), meyveli 5 (%20) ve light kefir örneklerinin ise 1 (%4) tanesinin; küf sayısı bakımından sade 3 (%12), meyveli 10 (%40) ve light kefir örneklerinin ise 1 (%4) tanesinin tebliğe uygunluk gösterdiği saptandı. Ayrıca asitlik ve yağ miktarı bakımından da incelenen tüm kefir örneklerinin tebliğe uygun olduğu görüldü.