Antibacterial Activities of Plant Powders with Magnesium Oxide

抄録

  The antibacterial activities of some plant powders with magnesium oxide (MgO) were investigated. The antibacterial activities were evaluated using a measuring system with 1% polypepton solutions and plant powder in a desiccator of about 6 liter. Tow antibacterial effects were evaluated by the measurements of CO₂ (aerobic bacteria) and mercaptan (anaerobic bacteria) production using a gas-detecting tube. A synergy effect of aerobic bacteria and anaerobic bacteria on the antibacterial activities was observed for phellodendron amurense and rosmarinus officinalis L. with MgO, and green tea as a comparison material. The antibacterial activity of the case of rosmarinus officinalis L. was high and almost the same as that of green tea. The difference between these plant materials was considered to be attributed to the antibacterial activities of the dietary compounds and the contents in rosmarinus officinalis L., phellodendron amurense and green tea. The plant powders with MgO evaluated in this study were useful as the antibacterial material for the organic farming.