Fig. 4
From: Effects of plasma-activated Ringer’s lactate solution on cancer cells: evaluation of genotoxicity
Colony formation by HeLa cells after treatment with lactec at various pH values. A The photos show stained colonies formed in the wells of 6-well plates after treatment with 20 mM phosphate-buffered (pH 7.2) or 20 mM citrate-buffered (pH 6.1 ~ 5.7) lactec. B The relative colony-forming ability of HeLa cells treated with lactec containing 20 mM buffer with different pH values (pH 7.2: phosphate buffer, 6.1 ~ 5.7: citrate buffer)