硝酸盐
铵
浮游植物
硝酸还原酶
氮气
化学
微粒
常量(计算机编程)
米氏-门汀动力学
环境化学
营养物
生物化学
酶
酶分析
有机化学
程序设计语言
计算机科学
标识
DOI:10.1016/0304-3800(93)90042-q
摘要
Two systems of differential equations are proposed to describe the dynamic effects of NH4+ on NO3− uptake. The inhibitory function is of the form 1/(1 + [NH4+]/K4), where K4 is the Michaelis constant for NH4+ uptake. In the first system, concentrations of particulate nitrogen, NO3− and NH4+ are modeled, and NH4+ inhibits NO3− uptake directly. In the second, a pool of cellular reductant is added into which both reduced NO3− and NH4+ flow. Nitrate reductase also is included, and its formation is inhibited by NH4+. In each case, solutions agree well with published observations on a deep-tank culture of Ditylum brightwellii.
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