. 2014 Jun 10;160(1):123–131. doi: 10.1007/s12011-014-0019-3

Table 1.

Zn(II) concentration in a human fibroblast after 24 h of incubation with estimated amounts of compounds

Experimental group	Zn(II) concentration in cells (μg/g of total protein) after 24 h of incubation
Control (C)	0.076 ± 0.002^a
Zinc (Zn)	1.132 ± 0.057^b
Propolis (P)	0.030 ± 0.002^c
Zinc + Propolis (Zn + P)	0.067 ± 0.002^a

The values were expressed as a mean percentage with standard deviation. The mean values with different subscript letters were significantly different (p < 0.001), n = 3