Authors:
Sabire Yerlikaya, Sefa Topuz
Volume 29, Issue 2;
Pages: 62-64; 2023
ISSN: 2069-0053 (print), Agroprint;
ISSN (online): 2068-9551
In this research, Aspergillus niger inhibition with ethanol and methanol extracts of apricot leaves in cherry juice was investigated. Aspergillus niger concentration 3.5 log cfu/mL is determined in control cample (ju). Ethanolic (air-dried, microwave-dried) and methanolic (air-dried, microwave-dried) extracts (1 mL) are added to cherry juice (9 mL), separately. They were left for incubation at 25°C for 3 minutes. Then Aspergillus niger (1 mL) is put into test tubes on extracts and left for incubation at 25°C for 24 h. All extracts significantly reduced Aspergillus niger numbers in cherry juice compared to control samples. The highest inhibitory activity was detected in the sample extracted with methanol from microwave-dried apricot leaves (2.94 log cfu/mL). The effect of apricot leaves’ ethanol extract was found to be higher than methanol extract, except the samples dried in microwave. The reason for this might be that the phenolic compounds in apricot leaves are more soluble in ethanol than in methanol when they dried in air. Additionally, the heat applied in the microwave might have damaged the phenolic compounds found in apricot leaves. These results demonstrated that apricot leaves can be used for decrease Aspergillus niger in cherry juice at 25°C.
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