【摘要】 本文在先前用锗和稀土元素促进梨形四膜虫(Tetraphymena Pyriformis S1)细胞生长分裂工作的基础上,继续探寻稀有微量元素砷、硒、碲、铼、铱对它的作用。实验发现,当聚蛋白胨培养液中添加的砷浓度为0.03—0.05ppm,硒浓度在0.01—1.0ppm范围时,它们分别显示出对四膜虫生长分裂的促进作用。首次发现,稀有元素铼、铱对四膜虫群同样具有促进繁殖的作用,其浓度分别是:钵0.02—0.08ppm,铱1.0—3.0ppm;而它们抑制该细胞生长分裂的浓度分别为:铼>50ppm,铱>20ppm;从而表明它们是属于低毒或无害元素。另一元素碲未见增益作用,当碲浓度大于10ppm时出现抑制的影响。更多还原

【Abstract】 As an excellent unicellular biological model, Tetrahymena pyriformis S1 has been employed in studying the biological effects of the chemical elements. The nutritious and/or toxic effects on T. pyriformis S1 induced by As, Se, Te, Re, Ir have been observed. Trace amounts of As, Se, Re and Ir added in the peptone-glucose culture medium could stimulate the cell proliferation of T. pyriformis in the following range of concentration respectively: As 0.03-0.05 ppm, Se 0.01-1.0 ppm, Re 0.02-0.08 ppm, Ir 1.0-3.0 ppm, whereas Te only showed its inhibitory effect on the growth of cells.更多还原