True Protein-General Information. True protein, as the name implies, is the actual amount of protein in milk, while the former standard, crude protein, is derived from the nitrogen content in milk.Crude protein over evaluates the amount of protein in milk because it includes non-protein nitrogen.The new Federal Milk Marketing Orders, which went into effect January 1, 2000, pay for protein on a true-protein scale instead of the crude-protein scale that had been used previously in many parts of the country.rude protein over evaluates the amount of protein in milk because it includes non-protein nitrogen. The new Federal Milk Marketing Orders, which went into effect January 1, 2000, pay for protein on a true-protein scale instead of the crude-protein scale that had been used previously in many parts of the country.
In adults, a diameter of 2.1 cm/m2 has been considered the upper normal range in ascending aorta. Transthoracic echocardiography suffices to quantify maximum aortic root and proximal ascending aorta diameters when the acoustic window is adequate.
The heart pumps blood from the left ventricle into the aorta through the aortic valve. Three leaflets on the aortic valve open and close with each heartbeat to allow one-way flow of blood.The aorta is a tube about a foot long and just over an inch in diameter.The aorta is divided into four sections:1  The ascending aorta rises up from the heart and is about 2 inches long. 2  The coronary arteries branch off the ascending aorta to supply the heart with blood. 3  The aortic arch curves over the heart, giving rise to branches that bring blood to the head, neck, and arms.he aorta is divided into four sections: 1  The ascending aorta rises up from the heart and is about 2 inches long. 2  The coronary arteries branch off the ascending aorta to supply the heart with blood. 3  The aortic arch curves over the heart, giving rise to branches that bring blood to the head, neck, and arms.