A study by the U.S. Geological Survey report published in 2002 found detectable quantities of PPCPs in 80 percent of a sampling of 139 susceptible streams in 30 states.

A negative result is generally proof of the absence of detectable quantities of heme, however a false positive can be generated in the presence of a reducing agent.

We were, of course, quite sober and capable, our host agreed, but we'd both imbibed detectable quantities of alcohol, and we couldn't be allowed to run the risk.

This is not "a steroidal hormone," he continued, adding, "it is a protein hormone that is not passed on in any detectable quantity in milk."

It was the base he wanted, not the speedster; and that base would never, under any conceivable conditions, emit any detectable quantity of traceable radiation.

It is present only at detectable quantities in blood during pregnancy, as it is produced by the placenta, and may explain partially the increased rate of thrombosis during pregnancy.

Some fat-soluble vitamins, namely D, E and K, have also been found in sorghum grain in detectable, but insufficient, quantities.

Subject does not radiate significantly in any other quantity detectable and measurable from ship's present altitude.

This strain was created by Arcamone et al. in 1969 by mutating a strain producing daunorubicin, but not DXR, at least in detectable quantities.

Freshly-fallen snow surfaces are virtually sterile, though bacteria are present in detectable quantities even on the southern polar ice-cap (Meyer-Rochow, 1979).