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Sains Malaysiana 41(10)(2012): 1217–1221
Total
Polyphenol Content and Free Radical Scavenging Activity of Cornsilk (Zea
mays hairs)
(Kandungan Polifenol Jumlah dan Aktiviti Perencatan Radikal Bebas
dalam
Rerambut Jagung Muda (Zea mays Hairs)
W.I. Wan Rosli *
Nutrition Program, School of Health Sciences, Universiti
Sains Malaysia Health Campus
16150 Kubang Kerian, Kelantan, Malaysia
A.R Nurhanan & S.S.J. Mohsin,
School of Health Sciences, Universiti Sains Malaysia Health
Campus
16150 Kubang Kerian, Kelantan, Malaysia
Received: 27 July 2011 / Accepted: 21 May 2012
ABSTRACT
Total polyphenol content and free radical scavenging activity of
cornsilk (Zea mays hairs) extracts
were determined. Our result showed the total polyphenol content of methanolic
and water extracts were 272.81 mgGAE/100 g and 256.36 mgGAE/100 mg dry plant,
respectively. The total flavanoid content of methanolic extract (38.01 mg
catechin equivalent/100 g) was significantly higher (p<0.05)
than the water extract (4.11 mg catechin equivalent/100 g). In radical
scavenging activity, the activity of methanolic extract was significantly
higher (p<0.05) than the water extract. The methanolic extract
scavenged at 81.7% of free radicals at 1000 μg/mL while the water extract
showed 63.5% of inhibition. In conclusion, cornsilk contained high polyphenol
components with strong free radical scavenging activity thus could be
considered as potential source of natural antioxidant.
Keywords: Antioxidant assay; cornsilk (Zea mays hairs); radical scavenging activity;
total polyphenol
ABSTRAK
Kandungan jumlah polifenol dan aktiviti perencatan radikal bebas
dalam ekstrak rerambut jagung muda (Zea mays hairs) telah ditentukan. Hasil kajian mendapati jumlah
kandungan polifenol dalam ekstrak metanolik and berair masing-masing adalah
272.81 mgGAE/100 g dan 256.36 mgGAE/100 mg (asas kering). Kandungan flavanoid
bagi ekstrak metanolik (38.01 mg catechin/100 g) adalah lebih tinggi secara
signifikan (p<0.05) daripada ekstrak berair (4.11 mg catechin/100
g). Dalam aktiviti perencatan radikal bebas, peratus perencatan ekstrak
metanolik adalah lebih tinggi secara signifikan (p<0.05)
berbanding dengan ekstrak berair. Ekstrak metanolik merencat sebanyak 81.7%
pada 1000 μg/mL sementara ekstrak berair menunjukkan peratus perencatan
sebanyak 63.5%. Kesimpulannya, sutera jagung mengandungi komponen polifenol
yang tinggi dengan aktiviti perencatan radikal bebas yang kuat. Hal ini
mencadangkan sutera jagung untuk dipertimbangkan sebagai sumber anti-pengoksida
semula jadi yang berpotensi.
Kata kunci: Aktiviti perencatan radikal bebas;
polifenol jumlah; sutera jagung; ujian antioksida
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*Corresponding author; email: wrosli@kck.usm.my
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