Biological Laboratories, Harvard University, Cambridge, Massachusetts, and the Haskins Laboratories, New York, New York.
J Gen Physiol. 1941 Jul 20;24(6):789-96. doi: 10.1085/jgp.24.6.789.
The influence of graded x-ray doses upon nitrogen fixation and respiration by Azotobacter was studied by means of the Warburg method. It was found that nitrogen fixation decreases approximately linearly with increasing x-ray doses. Respiration in contrast is affected only indirectly through some inhibition of cell multiplication. Small doses of x-ray often produce a slight and transient increase in the rate of oxygen uptake.
采用瓦堡（Warburg）法研究了梯度 X 射线剂量对固氮菌氮固定和呼吸的影响。结果发现，氮固定随 X 射线剂量的增加而呈近似线性下降。相比之下，呼吸仅通过对细胞增殖的某种抑制而间接受到影响。小剂量的 X 射线通常会轻微且短暂地增加氧摄取率。
