The automatic cab signal system shall be arranged so that cab signals will be continuously controlled in accordance with conditions described in Â§ 236.205 that obtain at least stopping distance in advance. Â§ 236.512 Cab signal indication when locomotive enters block where restrictive conditions obtain.
Dissolved oxygen (DO) is a measure of the quantity of free oxygen molecules in water. The concentration of DO is an important indicator of the health of an aquatic ecosystem because oxygen is essential for almost all forms of life. Oxygen is necessary for respiration and for some chemical reactions.
If an athlete raises his PaO 2 to 400 mmHg by breathing pure oxygen the calculation is: [Hb X 1.34 X (SaO 2 /100)] + 0.003 X PaO 2 or [15 X 1.34 X 100/100] + 0.003 X 400. 20.1 + 1.2 = 21.3 mL/100 mL of blood. Even at a PaO 2 of 400 mmHg, only 5.6% of the oxygen content of blood is dissolved.Note that hemoglobin cannot be more than 100% saturated with oxygen. Very soon after the athlete stops breathing the pure oxygen, its minimal effect disappears. Itâs simply not enough to affect recovery or performance.efinitions: SaO 2 = arterial oxygen saturation, Hb = hemoglobin, 1.34 mL is the amount of oxygen a fully saturated gram of hemoglobin can carry, Pa0 2 = partial pressure of oxygen or the amount of oxygen dissolved in blood.