In this study, oat bran and blackberry were used separately and together in the production of probiotic yogurt (Lactobacillus acidophilus). It was aimed to determine the effect of oat bran and/or blackberry on probiotic viability, total phenolic content and antioxidant activity levels (DPPH, ABTS, CUPRAC methods) of yoghurts during both cold storage times and in vitro gastrointestinal digestion stages. At the end of the 21 day of storage period, it was determined that the highest and lowest L. acidophilus viability was found in yoghurt containing blackberry (B) (107 cfu/g) and oat bran (Y) (105 cfu/g), respectively. Oat bran and blackberry containing yogurt YB and control yogurt had the highest and lowest total phenolic content at the beginning and end of the storage period, respectively. According to the antioxidant activity results determined by the DPPH method, B yogurt had the highest antioxidant activity, while according to the ABTS and CUPRAC methods, YB yogurt had the highest antioxidant activity. As a result, it has been revealed that the functional properties of probiotic yogurt can be further improved with the addition of oat bran and blackberry, and blackberry can have a prebiotic effect on L. acidophilus.

Günümüzde tüketicilerin sağlıklı beslenmeye olan ilgisi ve bu konudaki farkındalığı her geçen gün artmaktadır. Hayvansal gıdaların tüketilmesinin bazı olumsuz yönleri ve bitkisel gıdaların hem kolay erişilebilir olması hem de sağlığa birçok olumlu etki göstermesi nedenleriyle, bitkisel gıdaların tüketimi artmaktadır. Probiyotiklerin laktoz sindirilebilirliğini arttırma ve bağışıklık sistemini düzenleme gibi işlevlerinin yanında, yüksek tansiyon, kanser, bağırsak ve vajinal enfeksiyonlar gibi bazı hastalıklara karşı olumlu etkileri birçok çalışmada ortaya konmuştur. Probiyotiklerin asit dirençliliği, antimikrobiyal madde üretme yeteneği ile patojenlere karşı inhibisyon etkileri de bu mikroorganizmaların gıdalarda kullanımını teşvik edici özelliklerdir. Probiyotikler yaygın olarak süt ürünlerinde kullanılmakla birlikte, bitkisel gıdaların probiyotikler için uygun bir gıda matrisi özelliği göstermesinden dolayı, bitkisel gıdalarda da probiyotiklerin kullanımı ile ilgili çalışmalar yapılmaktadır. Bu derleme çalışmasında, probiyotik mikroorganizmaların meyve, sebze ve tahıl ürünlerinde kullanımı, yaygın olarak kullanılan probiyotikler ve bu mikroorganizmaların gıdalarda canlılığını etkileyen faktörler araştırılmıştır.

In order to put cultured species on the market with high quality and few casualties, many important studies are carried out. Most of the researches are conducted in the development of feed and feed ingredients 30-60% of the production cost in farming. Therefore, in aquaculture, an interest in alternative feed ingredients is moving at a very fast rate. In this context, the use of enzymes, probiotics and prebiotics in animal feed has steadily increased in recent years with reasons such as effective control of fish diseases and prevention of infection, strengthening the immune system of fish, increase of the digestibility, reduction of the feed cost, reduction of larval-term mortality, provision of increase in growth, live weight gain, and getting rid of the negative effects of stress.

In this study, it was evaluated paraoxonase activity (PON) and malondialdehyde (MDA) level in liver tissue of Oreochromis niloticus fed with mannan oligosaccharide (MOS) supplemented diet. For this purpose, fish were fed commercial diet supplemented with 0.25%, 0.35% and 0.45% dietary MOS for 60 days. At the end of experiment, PON activity of liver tissue was increased in MOS groups when compared to control group. It was determined that MDA level of tissue was decreased significantly in MOS groups when compared to control group.