Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test. Vitamin B12 deficiency can be caused by many factors, one of which is pernicious anemia, a condition resulting in deficient production of intrinsic factor in the parietal cells of the stomach. Intrinsic factor is a protein that is needed to assist in the absorption of vitamin B12 into the small intestine.
Vacuum forming offers processing advantages over competitive processes such as fabrication, blow molding, injection blow molding, rotational molding, and injection molding. Because tooling costs are lower, relatively large parts can be economically fabricated.acuum forming offers processing advantages over competitive processes such as fabrication, blow molding, injection blow molding, rotational molding, and injection molding. Because tooling costs are lower, relatively large parts can be economically fabricated.
Manifold vacuum should not be confused with venturi vacuum, which is an effect exploited in carburetors to establish a pressure difference roughly proportional to mass airflow and to maintain a somewhat constant air/fuel ratio. It is also used in light airplanes to provide airflow for pneumatic gyroscopic instruments.anifold vacuum, or engine vacuum in an internal combustion engine is the difference in air pressure between the engine's intake manifold and Earth's atmosphere.