四膜虫细胞与过渡元素系

本文选用淡水纤毛虫—梨形四膜虫Sl株作实验,进一步研究过渡元素对细胞群体生长繁殖和抑制的影响。以未加元素作对照组比较时间t=37小时处各生长曲线的N/N_0值,得到细胞相对增殖率R与周期表中过渡元素浓度C的系列图。发现过渡元素对细胞生长分裂的促进浓度与他们在海水中的丰度之间,存在着相应消涨的关系,从而支持了生命起源和进化的海洋说;并从金属离子的水解形式和离子势方面,阐述第一过渡系元素在低浓度时的刺激促进作用与周期表中原子序数的依存关系。

TETRAHYMENA CELL AND SERIES OF TRANSITION ELEMENTS

An excellent strain S1 of tetrahymena, a kind of ciliates, which is widely recognized as an exceedingly favorable testing organism in studing general problems of biofunction and metabolism and toxicology of drugs, has been used in this study to observe both stimulation and inhibition effects of transition elements in the periodic table on organism. Comparing the N/N0 values at different concentrations of added elements with the N/N0 values of no-elements added, namely a controlled unit, at t = 37 hrin the cells growth curves, twenty seven figures of relative rate of proliferation were unfolded systematically. It is seemingly indicated that the relationship between the concentrations of transition elements promoting cell growth and their abundances in the sea water is being so correlated along the rising and falling trends of the curves, thus supporting the hypothesis of initial origin and evolution of life in the sea. Based on the stability constants of hydrolytic species of transition metal ions and their ionic potentials, the variation of the beneficial effects on proliferation of T. pyriformis by trace amount of various transition elements of the first series in the periodic table is discussed.