Some properties of specific cholinesterase with particular reference to the mechanism of inhibition by diethyl <i>p</i>-nitrophenyl thiophosphate (E 605) and analogues

Abstract

The maximum copper retaining power of the humic acid tested, 1600 ,uequiv. copper/g. humic acid, agrees reasonably well with the figure of 1400 ,uequiv./ g. obtained indirectly on whole soils (Lees, 1948). Humic acid contains about 56% carbon SUMMARY 1. The copper-retaining power of a humic acid from a Trinidad peat soil was 1600 itequiv. copper/g. humic acid. This is in agreement with previous results.