Table 1.
Antioxidant activity of DPPH, ABTS, Antioxidant protection factor and TBARs on water and 70% ethanol extract from Trachelospermum asiaticum.

	Antioxidant assay	Extracts	Antioxidant activity
			Phenolic compounds concentration (µg/mL)
			50	100	150	200
			^a	DPPH (%)	Water	76.40±0.91^a1)	80.88±0.72^b	83.87±0.59^c	85.36±0.34^d
					Ethanol	80.66±0.34^a	83.05±0.34^b	85.29±0.47^c	87.08±0.34^d
BHT2)	56.31±0.78^a	70.80±0.68^b			73.94±0.13^c	74.01±0.22^c
^b	ABTS (%)	Water	36.28±0.62^a	63.01±0.26^b	81.94±0.63^c	94.98±0.40^d
		Ethanol	37.54±0.44^a	63.77±1.00^b	83.51±0.32^c	95.84±2.33^d
		BHT	22.88±2.07^a	46.68±2.17^b	56.72±2.87^c	70.27±3.05^d
^c	Antioxidant protection factor (PF)	Water	2.29±0.04^a	2.43±0.11^b	2.49±0.03^b	2.51±0.07^b
		Ethanol	2.15±0.05	2.45±0.05^b	2.55±0.02^c	2.63±0.02^d
		BHT	2.86±0.02^a	3.04±0.02^b	3.10±0.01^c	3.14±0.02^d
^d	TBARs (%)	Water	43.88±4.88^a	70.44±0.35^b	83.41±0.77^c	89.94±1.43^d
		Ethanol	50.14±1.90^a	79.98±0.87^b	87.91±1.05^c	89.34±1.63^c
		BHT	94.07±0.08^a	93.88±0.61^a	93.42±1.17^a	93.74±0.97^a

Values with different alphabet in the column were significantly different among group at p<0.05 level by a Duncan’s multiple range test.
BHT, positive control