Lall N, Meyer J J
Department of Botany, University of Pretoria, Pretoria 0002, South Africa.
J Ethnopharmacol. 2000 Sep;72(1-2):313-6. doi: 10.1016/s0378-8741(00)00231-2.
Water and acetone extracts of the roots of Euclea natalensis A.DC. were investigated for their in vitro antibacterial properties. The Gram-positive bacteria tested appeared to be more susceptible to the extracts than the Gram-negative bacteria. The water and acetone extracts inhibited the growth of Bacillus cereus, Bacillus pumilus, Bacillus subtilis, Micrococcus kristinae and Staphylococcus aureus at concentrations ranging between 0.1 and 6.0 mg/ml. The water extract did not exert any inhibitory action on Gram-negative bacteria while the acetone extract showed inhibitory activity at a concentration of 5.0 mg/ml against all the Gram-negative bacteria investigated. The antibacterial activity of acetone extract was also investigated by a direct bioassay on TLC plates against S. aureus.
对纳塔尔核果木（Euclea natalensis A.DC.）根的水提取物和丙酮提取物的体外抗菌特性进行了研究。测试的革兰氏阳性菌似乎比革兰氏阴性菌对提取物更敏感。水提取物和丙酮提取物在浓度为0.1至6.0毫克/毫升之间时，可抑制蜡样芽孢杆菌、短小芽孢杆菌、枯草芽孢杆菌、克里斯蒂微球菌和金黄色葡萄球菌的生长。水提取物对革兰氏阴性菌没有任何抑制作用，而丙酮提取物在浓度为5.0毫克/毫升时，对所有研究的革兰氏阴性菌均表现出抑制活性。还通过在薄层色谱板上对金黄色葡萄球菌进行直接生物测定，研究了丙酮提取物的抗菌活性。
