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Journal of Zhejiang University SCIENCE B 2010 Vol.11 No.12 P.973-980


Chemical composition and antioxidant activity of certain Morus species

Author(s):  Mohammad Imran, Hamayun Khan, Mohibullah Shah, Rasool Khan, Faridullah Khan

Affiliation(s):  Institute of Chemical Sciences, University of Peshawar, Peshawar 25120, Pakistan, Department of Chemistry, Islamia College University, Peshawar 25120, Pakistan, Pakistan Council of Scientific & Industrial Research (PCSIR) Laboratories Complex, Peshawar 25120, Pakistan

Corresponding email(s):   hamayun84@yahoo.com

Key Words:  Mulberry fruits, Chemical composition, 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, Nutritional value, Pakistan

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Mohammad Imran, Hamayun Khan, Mohibullah Shah, Rasool Khan, Faridullah Khan. Chemical composition and antioxidant activity of certain Morus species[J]. Journal of Zhejiang University Science B, 2010, 11(12): 973-980.

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A1 - Mohammad Imran
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DOI - 10.1631/jzus.B1000173

In the present work, the fruits of four Morus species, namely Morus alba (white mulberry), Morus nigra (black mulberry), Morus laevigata (large white fruit), and Morus laevigata (large black fruit), were analyzed for proximate composition, essential minerals, and antioxidant potentials. For this purpose, the ripe fruits were collected from the northern regions of pakistan. The major nutritional components (moisture, ash, lipids, proteins, fibres, carbohydrates, and total sugar) were found to be in the suitable range along with good computed energy. Total dry weight, pH, and titratable acidity (percent citric acid) were (17.60±1.94)&#x2013;(21.97±2.34) mg/100 g, (3.20±0.07)&#x2013;(4.78±0.15), and (0.84±0.40)%&#x2013;(2.00±0.08)%, respectively. Low riboflavin (vitamin B2) and niacin (vitamin B3) contents were recorded in all the fruits, while ascorbic acid (vitamin C) was in the range from (15.20±1.25) to (17.03±1.71) mg/100 g fresh weight (FW). The 28mulberry fruits%29&ck%5B%5D=abstract&ck%5B%5D=keyword'>2f4a8b>mulberry fruits were rich with regard to the total phenol and alkaloid contents, having values of (880±7.20)&#x2013;(1650±12.25) mg/100 g FW and (390±3.22)&#x2013;(660±5.25) mg/100 g FW, respectively. Sufficient quantities of essential macro-(K, Ca, Mg, and Na) and micro-(Fe, Zn, and Ni) elements were found in all the fruits. K was the predominant element with concentration ranging from (1270±9.36) to (1731±11.50) mg/100 g, while Ca, Na, and Mg contents were (440±3.21)&#x2013;(576±7.37), (260±3.86)&#x2013;(280±3.50), and (240±3.51)&#x2013;(360±4.20) mg/100 g, respectivly. The decreasing order of micro-minerals was Fe>Zn>Ni. The radical scavenging activity of methanolic extract of fruits was concentration-dependent and showed a correlation with total phenolic constituents of the respective fruits. Based on the results obtained, 28mulberry fruits%29&ck%5B%5D=abstract&ck%5B%5D=keyword'>2f4a8b>mulberry fruits were found to serve as a potential source of food diet and natural antioxidants.

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Dr. Hamayun Khan@Islamia College University Peshawar Pakistan<hamayun84@yahoo.com>

2011-05-11 17:11:44

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