1.   In this procedure part of a gene from the target organism is amplified many millions of times to reach easily detectable levels.

2.   Drugs again brought that back down below detectable levels.

3.   Fish and Game will test the water until there are no detectable levels of either rotenone or TCE, Foy said.

4.   In addition, there are detectable levels of mercury in swordfish, tuna and shark.

5.   Studies made public this month show combinations of new and older drugs suppress the AIDS virus below detectable levels for extended periods.

6.   Taken jointly with other AIDS drugs, protease inhibitors have reduced HIV levels below detectable levels in test patients.

7.   Tests of air in and around the helmet factory revealed no detectable levels of the contaminants, Sheffer said.

8.   The more critical concern is the impact on aquatic species, which can build up surprisingly high concentrations of chemical pollutants from barely detectable levels.

9.   The mat, however, renders the chemicals harmless, breaking them down to carbon dioxide without producing any detectable levels of vinyl chloride.

10.   There were no detectable levels of E. coli.