Microwave Assisted Extraction of Juglone from Walnut Green Husk (Juglans regia L.)

Juglone is the natural bioactive component of walnut green husk (Juglans regia L.) which has been used in folk medicine and dyeing. Some studies have demonstrated antimicrobial activity of walnut green husk extract [1-3]. The phenolic compound juglone is present in all parts of the walnut and is known for its antimicrobial effect [4]. Thus, the walnut by-products could be valorised as sources of natural antimicrobial agent. Hence, an ecofriendly microwave-assisted extraction (MAE) technique was developed for the rapid extraction of bioactive juglone from walnut green husk. Several different influential extraction parameters such as microwave power, extraction time, solvent type, solvent concentration and solvent to husk ratio were studied in a one-factor-at-a-time method for the determination of optimum extraction conditions.

کلیدواژه ها:

Antimicrobial agent ، Juglone ، Microwave assisted extraction ، Walnut green husk