Journal of Biotechnology & Biomaterials
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The interest of eating healthy food has become obsession of the world. Bio yoghurt is a very favorite food which can be
healthier by fortifying it with a natural source of vitamins, antioxidant and phenolic compounds. The aim of this study
was to investigate the effect of bioactive compounds such as phenolic compounds, antioxidant, organic acids, carotenoids, and
vitamins of pomegranate(Punicagranatum L.) juice, piths and depth at different concentrations on activity and vitality of
probiotics and lactic acid bacteria during fermentation as well as, yeasts and molds count affecting the prolong of the yoghurt
shelf life from the first day till two weeks of storage. Samples had shown that phenolic compounds such as Oleuropein,Coumarin,
Ellagic, HydroxyTyrosol, Benzoic, Salycilic, Ferulic, Caffeine, Vanillic, Caffeic, Chlorogenic, Catecol, Catechein, Protocatchuic
and antioxidant compounds including Vitamins A, E, C, D concentration was changeable with different treatment within the
range of(Oleuropein 9.5-18.4 ppm, Coumarin 4797.9- 11219.3ppm, Ellagic 2.1 - 8.4 ppm, HydroxyTyrosol 17.6 -56.8 ppm,
Benzoic 5.5- 9.9 ppm, Salycilic 0.8 -5.8 ppm, Ferulic 3885 - 8668.8ppm,Caffeine 5704.9 - 10457.9ppm, Chlorogenic 29029
- 122708.2 ppm, Catecol 2301.1 - 71847.3 ppm, Catechein 3 - 19 ppm, Protocatchuic16899.4 - 40515.4 ppm)and Vitamins
(Vitamin A 0.067 - 1.17, vitamin E 0.073 - 1.96, vitamin C 75.95 - 171.27, vitamin D 0.33 -2.63 ppm). The effect of pomegranate
juice on molds and yeasts was also studied in agar plats showing a clear zone of fungi surrounding the injected juice but there
was no effect on the yeasts growth.
antioxidant, phenolic compounds, antimicrobial activity, pomegranate juice and pith, shelf life extension
Nanis H. Gomah is the head of the Department of Dairy Science, Faculty of Agriculture, Assiut University, Egypt. She completed her PhD In Dairy, Agriculture,
Assiut, 2005. Before taking the position of Head of the department she serverd various position in the university. She served as Lecturer,Dairy Science Department,
Faculty of Agriculture, Assiut University,2005, Assistant Lecturer, Dairy Science Department, Faculty of Agriculture, Assiut University,1999 and Demonstrator, Dairy
Science Department, Faculty of Agriculture, Assiut University,1992.
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