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).
Erythrocyte (RBC) Tests. 1  Mean Corpuscular Volume (MCV) measures the volume of red blood cells. Normal is 82 to 99 femtoliters. 2  Mean Corpuscular Hemoglobin (MCH) measures the amount of hemoglobin in an average cell. Normal is 25 to 35 picograms.