苹果渣乙醇提取物抗菌活性及防腐作用研究.

In order to improve the utilization of apple pomace resources, verify the antibacterial activity and antiseptic properties of the ethanol extract of apple pomace, the antibacterial activity of extract from apple pomace were determined by the inhibition zone test. In addition, the antibacterial effect of the extract under different pH and salt concentration had been studied. At the same time, the ethanol extract of apple pomace was applied to the preservation of Passiflora edulia, using sensory scores and various physical and chemical indicators(Vc, soluble solids, total acid, solid acid ratio)as the basis to investigate the antiseptic effect of the extract. The results were as follows:(1)The ethanol extract of apple pomace had no obvious inhibitory effect on yeasts(diameter of inhibition zone <1 mm), but it had obvious inhibitory effect on Staphylococcus aureus and Escherichia coli(diameter of inhibition zone was 6-9 mm).(2)The best inhibitory concentration for these strains was 4.0 g·L-1. In addition, when the antibacterial effect of the extract was optimal, the pH was 6-7 and the salt concentration was 5.0 g·L-1.(3)The optimal concentration for Passiflora edulia was 0.2%, and the rot rate after storage at this concentration was only 6.7%(control group was 67%), and the weight loss rate was 5.5%(control group was 36.3%). The soluble solids and total acid content were not significantly different from those before storage(P>0.05)(control group P<0.05). And most of the fruits were plump, firm, bright and shiny, moderately sweet and sour. The antibacterial extract of apple pomace has antibacterial activity and significant antiseptic effect, and provides a theoretical basis for the development and utilization of apple pomace resources. [ABSTRACT FROM AUTHOR]