A small number of RBCs are normally present in urine and usually result in a negative chemical test. An increased amount of hemoglobin and/or increased number of RBCs are detected as a positive chemical test result.
gigahertz. n, pl-hertz. 1. (Units) a unit of frequency equal to 10 9 hertz. Symbol: GHz.
Archimedes is a new system that uses the technique of resonant mass measurement (RMM) to detect and accurately count particles from 50 nm to 5 [micro]m in diameter, and to measure their buoyant mass, dry mass and size.