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Josef "Joschi" Pöhs (14 March 1912 – 30 December 1943) was a Luftwaffe ace and recipient of the Knight's Cross of the Iron Cross during World War II.The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership.
[17] [35] This is because nitrogen is five times more soluble in fat than in water, leading to greater amounts of total body dissolved nitrogen during time at pressure. Fat represents about 15–25 percent of a healthy adult's body, but stores about half of the total amount of nitrogen (about 1 litre) at normal pressures. [50]
Gas is breathed at ambient pressure, and some of this gas dissolves into the blood and other fluids. Inert gas continues to be taken up until the gas dissolved in the tissues is in a state of equilibrium with the gas in the lungs (see saturation diving), or the ambient pressure is reduced until the inert gases dissolved in the tissues are at a higher concentration than the equilibrium state ...
Once dissolved, distribution of the dissolved gas is by perfusion, where the solvent (blood) is circulated around the diver's body, and by diffusion, where dissolved gas can spread to local regions of lower concentration when there is no bulk flow of the solvent. Given sufficient time at a specific partial pressure in the breathing gas, the ...
A supersaturation of dissolved Nitrogen that exceeds twice ambient atmospheric pressure is unsafe Efficient decompression from high pressures should start by rapidly halving the absolute pressure, followed by a slower ascent to ensure that the partial pressure in the tissues does not at any stage exceed about twice the ambient pressure.
The Knight's Cross of the Iron Cross and its higher grades were based on four separate enactments.The first enactment, Reichsgesetzblatt I S. 1573 of 1 September 1939 instituted the Iron Cross (Eisernes Kreuz), the Knight's Cross of the Iron Cross and the Grand Cross of the Iron Cross (Großkreuz des Eisernen Kreuzes).
Dissolved inert gases such as nitrogen or helium can form bubbles in the blood and tissues of the diver if the partial pressures of the dissolved gases in the diver gets too high above the ambient pressure. These bubbles and products of injury caused by the bubbles can cause damage to tissues known as decompression sickness, or "the bends". The ...
For example, for nitrogen: N 2 (molecular gas) ⇌ 2 N (dissolved atoms) For the above reaction, the equilibrium constant is =, where: c at is the concentration of the dissolved atoms into the metal (in the case above, atomic nitrogen N),