Abstract
The study was carried out to investigate the presence of different phytochemicals as well as to determine the total phenolic and flavonoid contents of green pear/european pear peels and yellow pear/asian pear peels. Phytochemical screening of the pear peels was carried out following standard protocols. Total phenolic content was determined by Folin-Ciocalteu method and total flavonoid contents was determined by Aluminum Chloride Colorimetric method, measured using n-hexane, etil acetate, and methanol. Phenolics, flavonoids, tannins, alkaloids, and saponins are present in green pear and yellow pear peels. The total phenol and flavonoid contents are highest in methanol extracts in which green pear peels have a higher concentration than yellow pear peels. In conclusion, the green and yellow pear peels are rich in phenolic compounds and have great potential as natural antioxidants. Therefore, the results of this research should be considered to provide the possibility for future developments of highly functional antioxidants.
Highlights
Free radicals cause diseases in the body
Free radicals can found in the surrounding environment, some metals, cigarette smoke, drugs, packaged foods, addictive substances, etc (Dröge, 2002)
Antioxidants are a necessary substance to neutralize free radicals and prevent damage done by free radicals by supplementing the lack of free radicals
Summary
Free radicals cause diseases in the body. Free radicals are atoms or clusters that have one or more electrons. Other efforts to suppress oxidative stress in the body are balancing the antioxidant and prooxidant levels in the body by consuming foods as a source of bioactive substances to increase antioxidant capacity and plasma. Foods containing bioactive compounds are fruits and vegetables. Fruits and vegetables are a source of vitamins, minerals, and bioactive compounds that are helpful in the prevention of disease. Some studies indicate that the peel of fruits and vegetables has the potential for bioactive compounds, even a higher quantity than pulp. Fruits peel and vegetables can be developed as a source of bioactive substances that can prevent degenerative diseases from happening. Some studies indicate that bioactive compounds derived from fruits peel or vegetables can prevent diabetes mellitus, atherosclerosis, cancer, cardiovascular disease, or antioxidants. The study aims to determine the total capacity of the phenolic extract of pears and the influence of pear peel extracts on antioxidant activity
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