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.
1 The term Hertz was established by the International Electrotechnical Commission in 1930. 2  Kilohertz - kHz is defined as thousands of cycles per second.  Megahertz - MHz is defined as millions of cycles per second - 1000 x more than kilo.