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.
High-density polyethylene (HDPE) is one of the most commonly used plastics in the United States. Labeled as #2 plastic, it is typically found in milk jugs, plastic bags and refillable plastic bottles.igh-density polyethylene (HDPE) is one of the most commonly used plastics in the United States. Labeled as #2 plastic, it is typically found in milk jugs, plastic bags and refillable plastic bottles.
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.