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.
The terahertz, abbreviated THz, is a unit of electromagnetic (EM) wave frequency equal to one trillion hertz (1012 Hz). The terahertz is used as an indicator of the frequency of infrared (IR), visible, and ultraviolet (UV) radiation. Download this free guide.