For tumors affecting the bottom half of the bile duct, the cancer is removed with a Whipple operation. For tumors in the top half of the bile duct, surgical treatment often requires removal of the tumor together with a liver resection (removal) in an attempt to provide a surgical cure.
How long for plastic water bottle to decompose? An average time for a plastic bottle to biodegrade fully is approximately 450-1000 years. However, there are many different kinds of plastic in the world, most commonly the haâ¦rd and reusable ones, which take a longer time, and the soft and non-reusable ones, which take a shorter time.
1 To instantly freeze a supercooled water bottle, hold it by the neck and tap it on the bottom with your other hand. 2  If a snowflake or ice crystal forms, it should grow until the entire bottle is frozen. 3  This may take just a few seconds to a minute, depending on how cold the water is.