Phenolic compounds
Phenolic compounds were affected by the type of coverage. Changing rates of phenolic compounds during storage time were shown in table 1. The highest amount of phenolic compounds was observed in the control sample at day 14, and by increasing storage duration phenolic content was reduced in the control sample. Phenolic compounds of kiwi slices were increased by coating, with the highest amount of changes observed in 60% chitosan + 40%aloe vera. That rose 116.66% compares with the first day. After 60% chitosan + 40% aloe vera coverage the highest amount of total phenols was observed in 100% chitosan coverage with a 93.68% change. At the end of storage day 21 significant differences were not found between the 100% chitosan, 80% chitosan + 20% aloe vera, 100% chitosan coverage. Although at these times after 60% chitosan + 40% aloe vera coverage the highest amount of phenolic compounds wasobserved in 80% chitosan + 20% aloe vera coverage (table 1) when chitosan is blended with aloe vera make insoluble hydrocolloid coating that causes increased barriers against oxygen and water that polyphenol oxidase(PPO) and peroxidase (POD) enzymes cannot hydrolyse phenolic compounds. This effect is greater with 100% compared with 100% chitosan. It can be concluded that the greater percentage of mixing with chitosan can maintain a greater percentage of phenolic compounds. According to the research results, there is a close relationship between the levels of phenolic compounds and antioxidants, and this relationship was shown in this research to be between 60% chitosan + 40% aloe vera coverage which could maintain phenolic and antioxidant compounds. Gil et al. (2006) found that the highest correlation is between phenolic and antioxidant compounds. Pen and Jiang (2003), in experiments on chestnuts with concentrations of 0.5, 1 and 2% chitosan found the reduction of phenolic compounds to be under the influence of three enzymes, POD, PPO, L-phenylalanine (PAL). They found that the concentration of chitosan coating prevents changes in phenolic compounds. The accumulation of phenolic compounds on coated and uncoated samples is due to the high activity of the phenylalanine ammonia-lyase (Oms-Oliu et al. 2008).

Phenolic compoundsPhenolic compounds were affected by the type of coverage. Changing rates of phenolic compounds during storage time were shown in table 1. The highest amount of phenolic compounds was observed in the control sample at day 14, and by increasing storage duration phenolic content was reduced in the control sample. Phenolic compounds of kiwi slices were increased by coating, with the highest amount of changes observed in 60% chitosan + 40%aloe vera. That rose 116.66% compares with the first day. After 60% chitosan + 40% aloe vera coverage the highest amount of total phenols was observed in 100% chitosan coverage with a 93.68% change. At the end of storage day 21 significant differences were not found between the 100% chitosan, 80% chitosan + 20% aloe vera, 100% chitosan coverage. Although at these times after 60% chitosan + 40% aloe vera coverage the highest amount of phenolic compounds wasobserved in 80% chitosan + 20% aloe vera coverage (table 1) when chitosan is blended with aloe vera make insoluble hydrocolloid coating that causes increased barriers against oxygen and water that polyphenol oxidase(PPO) and peroxidase (POD) enzymes cannot hydrolyse phenolic compounds. This effect is greater with 100% compared with 100% chitosan. It can be concluded that the greater percentage of mixing with chitosan can maintain a greater percentage of phenolic compounds. According to the research results, there is a close relationship between the levels of phenolic compounds and antioxidants, and this relationship was shown in this research to be between 60% chitosan + 40% aloe vera coverage which could maintain phenolic and antioxidant compounds. Gil et al. (2006) found that the highest correlation is between phenolic and antioxidant compounds. Pen and Jiang (2003), in experiments on chestnuts with concentrations of 0.5, 1 and 2% chitosan found the reduction of phenolic compounds to be under the influence of three enzymes, POD, PPO, L-phenylalanine (PAL). They found that the concentration of chitosan coating prevents changes in phenolic compounds. The accumulation of phenolic compounds on coated and uncoated samples is due to the high activity of the phenylalanine ammonia-lyase (Oms-Oliu et al. 2008).
การแปล กรุณารอสักครู่..