Antifungal Activity and Anti-Corrosion Inhibition of Origanum Compactum Extracts

摘要

The objective of this study was to evaluate antifungal activities of Origanum compactum extractsagainst the growth of the phytopathogenic fungus Penicillium digitatum and the corrosion inhibitionbehavior of carbon steel in 0.5 M sulfuric acid in the presence these extracts have been studied usingthe weight loss and electrochemical methods. The aerial parts of Origanum compactum, an endemicmedicinal plant of the Moroccan North, were extracted with the soxhlet apparatus using the followingsolvents: petroleum ether, hexane, chloroform and methanol. The results showed that aqueous andmethanol 80 % extracts were very effective to control the growth of the fungus with 100% of theinhibition percentage at the concentration of 25g/l. Moreover, the percentage of the inhibition of themycelial growth was more than 97% at 1,125 g/l for the aqueous extract. From the soxhlet extracts,petroleum ether extract presented an important antifungal activity (83%) followed by methanol extract(45,9%). While hexane and chloroform extracts were less effective. For the corrosion application, theresults showed variation in inhibition performance of the inhibitor with varying concentration. Theresults obtained with different methods are in good agreement. Langmuir model was tested to describethe adsorption behaviour of inhibitor on the carbon steel surface.