Abstract:
Fresh green leafy vegetables Brassica juncea (Broad leaf Mustard), Chinopodium album
(Lamb’s quarter), Trigonella foenum graecum (Fenugreek), Anethum sowa (Dill greens) and
Amaranthus tricolor (Red Amaranth) were collected from Basantatar, Dharan, Sunsari
district Nepal and were washed with distilled water, fresh leaves of plant were extracted in
99% methanol to carry out the antioxidant assays. The antioxidant assay was determined by
three different parameters namely total antioxidant capacity, reducing power and DPPH
scavenging assay.
The total antioxidant capacity (TAC) of B. juncea, C. album, T. foenum graecum, A. sowa
and A. tricolor were found to be 33.55±0.65, 38.78±0.35, 40.41±0.32, 50.87±0.28 and
36.53±0.73 mg AAE/100 g Fresh weight respectively. Similarly, the reducing power of B.
juncea, C. album, T. foenum graecum, A. sowa and A. tricolor were found to be 19.38±0.05,
18.28±0.08, 18.06±0.12, 41.02±0.65 and 19.06±0.13 mg AAE/100 g respectively. Finally,
the DPPH scavenging activity of B. juncea, C. album, T. foenum graecum, A. sowa and A.
tricolor were found to be 21.85±0.61%, 26.97±0.4%, 31.55±1.22%, 58.45±2.22% and
41.38±1.12% respectively. Overall the study shows that the methanolic extract of fresh A.
sowa possessed higher antioxidant activity in all three antioxidant assays among the
vegetables selected in this assay
Description:
A dissertation submitted to the Department of Food Technology, Central Campus of
Technology, Tribhuvan University, in the partial fulfillment of the requirements for the
Bachelor degree in Food Technology
