Antibacterial Activity of Thai Medicinal Plant Extracts on the Skin ...

Tables
Table 1. Percent yield and inhibition zone diameter (IZD) <strong>of</strong> 1% <strong>of</strong> plant extracts against test bacterial strains.
Botanical name <strong>Thai</strong> name Part used
Acanthus ilicifolius Linn.
var. ilicifolius
Argyreia nervosa (Burm. f.)
Bojer
Punica granatum L. var.
granatum
Terminalia chebula Retz.
var. chebula
Zanthoxylum myriacanthum
Wall. ex Hook. F.
Ngueak plamo
Bai rabat
Thap thim
Samo thai
Ma khwaen
leaves
leaves
pericarps
fruit
fruit
* M: maceration; C: continuous extraction; S: solvent extraction
** IZD <strong>of</strong> all solvents were zero
● : black sticky extract, ❍ : oily extract
Extract Extracting IZD ± SD (mm) **
code method * Solvent % yield
S. aureus E. coli
AI – 1 M 95% ethanol 13.98 0 0
AI – 2 C hexane 6.83 0 0
AI – 3 C chlor<strong>of</strong>orm 2.03 0 0
AI – 4 C 95% ethanol 5.85 0 0
AN – 1 M 95% ethanol 8.77 0 0
AN – 2 C hexane 3.52 0 0
AN – 3 C chlor<strong>of</strong>orm 2.56 0 25
AN – 4 C 95% ethanol 5.08 0 0
PG – 1 M 95% ethanol 34.09 21.33 ± 0.58 25.66 ± 0.58
PG – 2 C hexane 1.15 0 0
PG – 3 C chlor<strong>of</strong>orm 0.65 0 15.66 ± 0.58
PG – 4 C 95% ethanol 42.80 20 24
TC – 1 C methanol 48.66 0 0
TC –2 S diethyl ether 3.22 15.33 ± 0.58 0
TC – 3 S n- butanol 18.34 0 0
TC – 4 S water 25.02 0 0
ZM – 1● M 95% ethanol 3.54 0 0
ZM – 2 ❍ M 95% ethanol 3.52 19.33 ± 0.58 18
ZM – 3 C hexane 14.14 16 17.66 ± 0.58
ZM – 4 C chlor<strong>of</strong>orm 6.14 0 0
ZM – 5 C 95% ethanol 9.74 0 0
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