Antimicrobial and Antioxidant Activities of Plants from Northeast of Mexico

Table 3

Effects of extracts and positive control on the in vitro free radical (DPPH) scavenging activity (𝜇g ml⁻¹).

Plant	Part	CE50 (𝜇g ml^−1)
Ceanothus coeruleus	L	8.3 ± 1.0
	F	28.0 ± 3.0
	R	5.6 ± 2.9
Chrysactinia mexicana	L	10.5 ± 1.1
	F	8.3 ± 1.0
Colubrina greggii	L	18.3 ± 3.2
	F	29.0 ± 3.7
	R	7.9 ± 1.7
Cordia boissieri	F	105.1 ± 2.3
Cyperus alternifolius	R	9.3 ± 0.6
Heliotropium angiospermum	F	35.2 ± 2.1
	L-S	29.4 ± 1.4
Phyla nodiflora	L	20.8 ± 2.21
Schinus molle	F	15.2 ± 4.0
	B	8.6 ± 1.6
Quercetin (positive control)		3.0 ± 1.3

L: leaves; F: flowers; B: bark; R: root; S: stem.