TABLE 2.

Incorporation of 14C into biomass and rRNA of N. eutropha and activated sludge from two wastewater treatment plants after incubation with radioactive bicarbonate

SampleIncubation time (h)Addition of:Incorporation of 14C into:
ATU (mg liter−1)14C (μCi ml−1)Total biomass (%)Purified rRNA
%cpm of RNA μg−1
N. eutropha Nm574803.638.80.1919,000
Wastewater treatment plant
    Aalborg West301074.40.059,000
13010710.20.0616,000
26010712.40.1337,000
351070.70.023,000
1351072.60.036,000
2651072.70.0410,000
    Oberding2.501077.50.1010,000
11010720.70.3331,000
25010722.80.2929,000
2.551070.60.012,000
1151072.10.032,000
2551073.20.024,000