Razak A A, Ramadan S E, el-Zawahry K
Department of Botany, Faculty of Science, Al-Azhar University, Medinet Nasr, Cairo, Egypt.
Biol Trace Elem Res. 1990 Jun;25(3):193-9. doi: 10.1007/BF02990414.
A selenium-dependent bacterium, Bacillus sp., failed to grow on selenium-free media. However, it is able to grow at high concentrations of sodium selenite containing media up to 3% (w/v). It accumulated extraordinary high quantities of selenium, 432 ppm/mL. The bacterium generated the transformation of inorganic selenium into volatile selenium form(s) into the atmosphere. The biological release of volatile selenium basically depended on several factors: incubation temperature, pH, incubation periods, and substrate concentration. Maximal quantity of the volatile selenium form was obtained at 30 degrees C, pH 7, and 1% (w/v) sodium selenite.
一种依赖硒的芽孢杆菌在无硒培养基上无法生长。然而，它能够在含亚硒酸钠浓度高达3%（w/v）的培养基中生长。它积累了极高含量的硒，达到432 ppm/mL。该细菌能将无机硒转化为挥发性硒形态释放到大气中。挥发性硒的生物释放主要取决于几个因素：培养温度、pH值、培养时间和底物浓度。在30℃、pH值为7以及1%（w/v）亚硒酸钠的条件下可获得最大量的挥发性硒形态。
