Synthesis and Characterization of O-Acetyl-chitosan Acetic Ester

Table 3

Inhibition rate of chitosan (CS) and O-acetyl-chitosan acetic ester (ACHA) on S. aureus.^a

Sample concentration (%) (w/v)	0.03125	0.0625	0.125	0.25	0.5	1
	Inhibition rate (%)
Acetic acid	2.2 ± 1.9	9.1 ± 2.7	16.3 ± 3.3	19.8 ± 1.4	22.3 ± 2.9	27.2 ± 2.1
CS	63.9 ± 2.1	70.2 ± 1.3	90.8 ± 1.7	93.4 ± 1.3	95.7 ± 0.2	100 ± 0.0
ACHA	75.1 ± 2.1	83.6 ± 1.2	95.2 ± 0.3	97.0 ± 0.3	99.0 ± 0.3	100 ± 0.0

^aValues represent mean ± S.D., . S. aureus: Staphylococcus aureus.