بررسی تاثیرات کربناته کردن و آب پرتقال بر خصوصیات فیزیکی، شیمیایی و میکروبی آب هویج پاستوریزه

Abstract



The effect of CO2 (0.5 l min^-1 for 15 min) and orange juice (30% v/v carrot juice) on phisico-chemical characteristics as well as microbial flora of carrot juice within the three months of storage was investigated. Both orange juice and CO2 caused a decrease in pH value of carrot juice but pH reduction was higher when orange juice (30 percent) was added. Samples of carrot-orange juice had higher value of acidity and lower pH. Blending orange juice with carrot juice caused higher percentage of precipitation, decrease in a* and b* values and increase in L* value. The results of this experiment showed that sugar decreases the percentage of precipitation in pasteurized carrot juice. No microbial growth was detected in either of the treatments.