Thermochemical studies of selenium: I. Microcalorimetric study of effect of Na2SeO3 onBacillus subtilis Growth

By using LKB2277 bioactivity monitor, we have studied the effect of Na2SeO3 on Bacillus subtilis Growth at two different media and found the antagonism of protein on its toxicity. Low concentration of Na2SeO3 has promoting action, and high concentration of Na2SeO3 has inhibitory action. Half inhibitory concentration (IC 50) of BPY medium is 4.2×10−1g/L, andIC 50 of PD medium is 2.2×10−2g/L.