Table 2. Quantitative Values of Zone of Inhibition against E. coli, MIC Calculation, and OD₆₀₀ Value Measurements after 18 h Incubation of Polymer-Treated Cells.

		radius of zone of inhibition (cm) (R1)
polymer	volume (μL)	set 1	set 2	SDa	R1 (average)	zone of inhibition (cm2)b	MIC (μg/mL)	MIC (μM)	concentration (μg/mL)	OD600
DLP	5	0.00	0.00	0	0.00	0.00	∼80	∼1.6	200	0.358
	10	0.44	0.46	0.014	0.45	0.51			400	0.199
	20	0.55	0.55	0	0.55	0.82			600	0.205
DHBP1	5	0.00	0.00	0	0.00	0.00	NCc	NCc	NC	NC
	10	0.41	0.39	0.014	0.40	0.38			NC	NC
	20	0.58	0.62	0.028	0.60	1.00			NC	NC
DHBP2	5	0.00	0.00	0	0.00	0.00	NC	NC	NC	NC
	10	0.43	0.37	0.042	0.40	0.38			NC	NC
	20	0.62	0.58	0.028	0.60	1.00			NC	NC
DHBP3	5	0.00	0.00	0	0.00	0.00	50	1.4	200	0.175
	10	0.00	0.00	0	0.00	0.00			400	0.271
	20	0.48	0.52	0.028	0.50	0.66			600	0.207
DHBP4	5	0.00	0.00	0	0.00	0.00	NC	NC	200	0.315
	10	0.43	0.37	0.042	0.40	0.38			400	0.344
	20	0.68	0.72	0.028	0.70	1.41			600	0.351
DSP1	5	0.00	0.00	0	0.00	0.00	NC	NC	NC	NC
	10	0.43	0.47	0.028	0.45	0.51			NC	NC
	20	0.50	0.50	0	0.50	0.66			NC	NC
DSP2	5	0.00	0.00	0	0.00	0.00	NC	NC	NC	NC
	10	0.48	0.42	0.042	0.45	0.51			NC	NC
	20	0.60	0.60	0	0.60	1.00			NC	NC
DSP3	5	0.00	0.00	0	0.00	0.00	NC	NC	NC	NC
	10	0.39	0.41	0.014	0.40	0.38			NC	NC
	20	0.55	0.55	0	0.55	0.82			NC	NC
DSP4	5	0.00	0.00	0	0.00	0.00	NC	NC	200	0.379
	10	0.29	0.31	0.014	0.30	0.16			400	0.379
	20	0.52	0.48	0.028	0.50	0.66			600	0.337
DSP5	5	0.00	0.00	0	0.00	0.00	50	1.2	200	0.075
	10	0.42	0.38	0.028	0.40	0.38			400	0.109
	20	0.55	0.55	0	0.55	0.82			600	0.140

^aStandard deviation.

^bZone of inhibition = π(R₁² – r²), r = radius of sterilized filter paper = 0.2 cm.

^cNot calculated.