Direct emissions are produced from residential and commercial activities in a variety of ways: 1  Combustion of natural gas and petroleum products for heating and cooking needs emits carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O).
Of red blood cell number. Classically this was the packed cell volume. blood was placed in a microtube and spun in a centrifuge. The rbcs settle to the bottom and one measures the height in the tube and reported as a percentage. Now determined by an automated machine. A typical hct is about 3 x the hemoglobin (hgb).
The mean cell volume (MCV) indicates the volume of the âaverageâ red blood cell (RBC) in a sample. It is expressed in femtoliters (FL; 10-15 liters). Traditionally, MCV was a calculated parameter, based on the packed cell volume (PCV) and RBC count (RBC) derived by using the following formula: MCV = (PCV Ã· RBC) x 10.