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.
Over 60 million tonnes of poly(ethene), often known as polyethylene and polythene, is manufactured each year making it the world's most important plastic. Its uses include film, packaging and containers, from bottles to buckets.ses of poly(ethene) (polyethylene). -3) and linear low density (LLDPE) (ca 0.915-0.940 g cm -3) and high density (HDPE) (ca 0.940-0.965 g cm -3). The LDPE or LLDPE form is preferred for film packaging and for electrical insulation.
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.