Synthesis and Characterization of O-Acetyl-chitosan Acetic Ester

Table 2

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

Sample concentration (%) (w/v)	0.03125	0.0625	0.125	0.25	0.5	1
	Inhibition rate (%)
Acetic acid	2.7 ± 0.9	7.1 ± 1.2	14.1 ± 1.0	16.0 ± 1.1	19.8 ± 1.2	24.6 ± 2.7
CS	20.7 ± 2.2	47.5 ± 3.1	54.8 ± 2.3	62.1 ± 2.0	74.1 ± 0.9	83.2 ± 1.2
ACHA	27.1 ± 1.9	53.6 ± 2.2	62.3 ± 2.6	69.3 ± 2.4	81.3 ± 0.9	93.7 ± 0.7

^aValues represent mean ± S.D., . E. coli: Escherichia coli.