Document Type : Original research articles
Authors
1
Dep. of Home Economics, Faculty of Specific Education, Alexandria University, Alexandria, Egypt
2
Dep. of Nutrition and Food Science, Faculty of Home Economics, Menoufia University, Shebin El-Kom, Egypt
Abstract
The purpose of this work to examinesthe antioxidant and antibacterial activities of beef burger by using kiwi fruitspeelpowder (KPP) throughout twelvedays of cold storage. Beef burger prepared with adding KPP in three different concentrations 1%,3% and 5%. Sensory attributes was evaluated of cooked beef burger. The mostacceptable product is the one that has been analyzed. Changes of moisture, ash, fat, protein and crude fiber were determined during different time of storage inuncooked beef burger. The antioxidant activity (radical scavenging DPPH), total phenolic content,peroxide value and pH value were determined.Color stability was also evaluated. The effect of kiwifruitspeelpowder (KPP) on total bacterial countat three different concentrations of uncookedbeef burger was also studiedat different time of storage. The results observed that the most acceptablelevel for beef burger with kiwi fruitspeelpowder (KPP)was 5% KPP.The values of protein, moisture, ash, fat, crude fiber and carbohydrates ofkiwi fruitspeelpowder were found to be 6.86±0.09, 3.45±0.13, 7.76±0.22, 0.86±0.09,8.05±0.02 and 73.02±0.05%, respectively.It is observed that the addition of 5% kiwi fruitspeel powder to beef burger led to increase its content of protein and fiber while the values of moisturedecreased, and led to lowerperoxide values than control at 8-day and 12-day.Also, the resultsshowed that the higher antioxidant activity of kiwi fruitspeel powder is due to the higher content of phenolic compounds.The addition of kiwifruits peel powder as natural antioxidant on beef burger improved the oxidative stability and reduces the bacterial growth.This study confirmed that kiwifruitspeel powder could provide as potential sources of natural antioxidants and antibacterial properties, so it can be used safely in meat products industry.
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