Wellman R P, Cook F D, Krouse H R
Science. 1968 Jul 19;161(3838):269-70. doi: 10.1126/science.161.3838.269.
The abundance of N(15) relative to N(14) is significantly altered during experiments in vitro in which nitrate and nitrite are microbiologically reduced to nitrogen gas. In all studies to date, N(14)O(3)-and N(14)O(2)-species have been preferentially reduced. This selectivity has a complex dependence on conditions in the medium. The results are not only relevant to natural variations in N(15) relative to N(14) but should be seriously considered during N(15) tracer studies in soils.
在体外实验中，当硝酸盐和亚硝酸盐被微生物还原为氮气时，相对于N(14)，N(15)的丰度会发生显著变化。在迄今为止的所有研究中，N(14)O(3)和N(14)O(2)物种被优先还原。这种选择性对培养基中的条件有复杂的依赖性。这些结果不仅与N(15)相对于N(14)的自然变化有关，而且在土壤中的N(15)示踪研究中也应予以认真考虑。
