Table 2. The cell viability for HT-29 cells with light AgNPs during 24 and 48 hours by MTT.

Concentrations (µg/ml)	3.125	6.25	12.5	25	50	100
Cell viability (% of control)	a42.5‏ ±‏ 0.36	22.5‏ ±‏ 0.49	11.75±0.44	7.7±0.34	5.25±0.27	1.27±0.12
	b34.25±‏ 0.44	13.7‏ ±‏ 0.42	9.2‏ ±‏ 0.37	4.7±0.28	2.5±0.22	1±0.09

* Percentage of cell survival within 24 (a) and 48 (b) hours