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Antioxidant Properties of Dried, Green, Oolong, and Black Teas of Ziziphus
mauritiana (Bidara) leaves.
Alya Nabila Binti Morad
Supervisor: Dr. Zamzahaila Binti Mohd Zin
Bachelor of Food Science (Food Technology)
School of Food Science and Food Technology
Ziziphus mauritiana (Z. mauritiana) or locally known in Malaysia as ‘Bidara’ is a tropical
fruit tree belongs to family Rhamnaceae. Z. mauritiana are proved to have pharmacologic
properties including anti-tumor, antifungal, and anti-diabetic properties. These
pharmacologic properties of Z. mauritiana activity are related to its antioxidant content.
However, Z. mauritiana is considered as an underutilized species due to its lack of
commercial value and thus it is not commercially utilized. Hence, this study will be
conducted to evaluate and compare the antioxidant activity, phenolic, and flavonoid
contents of dried (non-fermented), green (least fermented), oolong (semi-fermented),
and black (fermented) teas made from Z. mauritiana leaves. The antioxidant activity will
be determined using free radical scavenging activity (DPPH), Ferric Thiocyanate (FTC)
and Thiobarbituric Acid (TBA) assay while flavonoid contents will be determined using
High-Performance Liquid Chromatography (HPLC) analysis. Z. mauritiana leaves will be
expected to have high antioxidant activity.
1233 | UMT UNDERGRADUATE RESEARCH DAY