Blockage of the bile duct by a cancer, gallstones, or scarring from injury prevents the bile from being transported to the intestine and the active ingredient in the bile (bilirubin) instead accumulates in the blood.
Best Answer: millions of things. Polyethylene is the most popular plastic in the world.It has a very simple structure, the simplest of all commerical polymers. A molecule of polyethylene is a long chain of carbon atoms, with two hydrogen atoms attached to each carbon atom.t is used to provide coatings to paper and paperboard products for packaging of liquids such as milk and fruit juices, and to provide a moisture barrier to paper and woven cloth. It is also used for the coating of foil to provide a heat-seal layer in multilayer film structures.
Article Summary: Explanation on why nitrogen must be used for welding polyethylene and polypropylene. Nitrogen must be used to prevent oxidation for both polyethylene and polypropylene. If you weld these materials with compressed air, the combination of the compressed air and heat cause oxidation and the welds will not be as strong. For good welds you must use at least a 50/50 mixture of nitrogen and compressed air.