Aromatase inhibitor. Aromatase inhibitors (AIs) are a class of drugs used in the treatment of breast cancer in postmenopausal women and gynecomastia in men. They may also be used off-label to reduce increase of estrogen conversion during cycle with external testosterone. They may also be used for chemoprevention in high risk women.
Supporters of the Keystone XL Pipeline herald it as a job-creating machine, producing as many as 119,000 jobs. But only 3,900 workers will actually be required to build the pipeline to carry oil from Canada to the Gulf of Mexico, according to the U.S. State Department, and those jobs will only last for a year. There will be 35 permanent positions created.
TransCanadaâs Keystone Pipeline transports more than 500,000 barrels per day of Canadian crude oil to U.S. refinery markets and has transported more than 340 million barrels since it opened in July 2010.il sands crudes are transported at similar pipeline pressures to other heavy crude oils. All oil pipelines are required to operate under a designated maximum operating pressure (MOP) that is based on the strength of the pipe.