Effect of ultrasound on different quality parameters of apple juice |
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Authors: | Muhammad Abid Saqib Jabbar Tao Wu Malik Muhammad Hashim Bing Hu Shicheng Lei Xin Zhang Xiaoxiong Zeng |
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Affiliation: | 1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China;2. Department of Food Technology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan;3. Department of Food Science & Technology, Gomal University, Dera Ismail Khan, Pakistan |
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Abstract: | Fresh apple juice treated with ultrasound (for 0, 30, 60 and 90 min, at 20 °C, 25 kHz frequency) was evaluated for different physico-chemical, Hunter color values, cloud value, antioxidant capacity, scavenging activity on 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical, ascorbic acid, total phenolics, flavonoids, flavonols and microbial characteristics. No significant effect of sonication was observed on pH, total soluble solids (°Brix) and titratable acidity of apple juice. Sonication significantly improved ascorbic acid, cloud value, phenolic compounds, antioxidant capacity, DPPH free radical scavenging activity and differences in Hunter color values. Moreover, significant reduction in microbial population was observed. Findings of the present study suggested that sonication treatment could improve the quality of apple juice. It may successfully be employed for the processing of apple juice with improved quality and safety from consumer’s health point of view. |
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Keywords: | Apple juice Ultrasound Quality Bioactive compounds Antioxidants |
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