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.
The solution is to provide a large-volume plenum chamber between the inlet and the cylinders. This has two benefits: it evens out the difference in path restriction between cylinders (distribution across space), secondly it provides a large-volume buffer against pressure changes (distribution over time).hese gave rise to the notion of 17th century 'plenum' as the opposite of vacuum, and all things being either Plenum or Vacuum. By the 19th century, the development of mechanical fans and industrial machinery had provided another, more technical use.