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Studies on the effect of drying on the chemical composition and antioxidant activities of the fruits of Momordica charantia (Karela) and Momordica dioica (Kankoda)

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Title Studies on the effect of drying on the chemical composition and antioxidant activities of the fruits of Momordica charantia (Karela) and Momordica dioica (Kankoda)
 
Creator Nehra, Sukriti
 
Contributor Khabiruddin, M.
 
Subject Momordica charantia, Momordica dioica, phenols, flavonoids, ascorbic acid, antioxidant activity
 
Description Antioxidant compounds in food play an important role as a health protecting factor. Scientific
evidence suggests that antioxidants reduce the risk for chronic diseases including cancer and heart
disease. The main characteristic of an antioxidant is its ability to trap free radicals. These free radicals
may oxidize nucleic acids, proteins, lipids or DNA and can initiate degenerative disease. Antioxidant
compounds like phenolic acids, polyphenols and flavonoids scavenge free radicals and thus inhibit the
oxidative mechanisms that lead to degenerative diseases. The fruits of Momordica charantia (Karela)
and Momordica dioica (Kankoda) are used traditionally as both food and medicine. The availability of
these vegetables is seasonal and limited to certain pockets of the country. In order to make it available
throughout the year in adequate quantity, these are used in dried form. So the aim was to determine the
content of total phenols, flavonoids and ascorbic acid in the acetone, ethanol and water extracts of fresh
and dried fruits of Karela and Kankoda and the antioxidant activity of these extracts by: 2, 2’-diphenyl-1-picrylhydrazyl (DPPH) method, Ferric Thiocyanate (FTC) method and β-carotene
bleaching test (BCBT). It was found that the contents of total phenols, flavonoids and ascorbic acid
decreased in the acetone, ethanol and water extracts of the dried fruits of Karela. On drying the fruits of
Kankoda, the concentration of flavonoids increased in the acetone extract. The antioxidant activity of
the acetone extract of the dried fruits of Karela increased in all the three test methods. But the ethanol
and water extracts showed decrease in antioxidant activity by DPPH method and increase in FTC and
BCBT methods.The water extracts of the dried fruits of Kankoda showed increase in antioxidant
activity in all the three test methods while acetone extract showed increase in the antioxidant activity in
FTC and BCBT methods.
 
Date 2016-09-07T09:42:57Z
2016-09-07T09:42:57Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/75777
 
Language en
 
Format application/pdf
 
Publisher CCSHAU