Energy-rich phosphorus compound

More recently Nelson and Bamum (1960) have demonstrated an effect on brain phosphatidylcholine metabolism, occurring a very short time after the injection of 2.5 mg/kg body weight of DFP. After 3 hours the level of energy-rich phosphorus compounds was unaffected, but the transfer of from the acid-soluble pool to the phospholipids was significantly... 

The relatively recalcitrant dissolved poly-phenolic compounds resulting from breakdown of higher plants (fulvic and humic acids) complex with many bacterial and algal enzymes, but particularly phosphatases (Wetzel, 1992). The formation of such complexes inactivates phosphomonoesterase (Boavida and Wetzel, 1998), which is inhibited both competitively and non-competitively (Wetzel, 1992). Phosphorus-limited cells therefore need to expend more energy on phosphatase synthesis, and enhanced phosphomonoesterase activity has been reported for waters with increased humic materials (Stewart and Wetzel, 1992b). Wetzel (1992) pointed out these results with frequent observations (e.g. Jones, 1990) that the primary production in humic-rich waters is consistently lower than in clear waters with comparable loadings and light availability. 

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