EN
The membrane potential of Chinese hamster fibroblasts was determined to be (-29,9 ± 6.5) mV. Fibroblast membranes irradiated with red laser light of 670 nm were partially depolarized. This effect was observed for energy doses of 5 J and 10 J. The energy dose of 15 J did not further decrease the membrane potential. In contrast to the red light, the irradiation with green laser light (543.5 nm) did not change fibroblast membrane potential.