Sterling silver contains 92.5% silver. The rest is copper or some other metal. It is used for jewellery and silver tableware, where appearance is important. Silver is used to make mirrors, as it is the best reflector of visible light known, although it does tarnish with time.
There are three types of pancreatic tumors. Insulinoma: This is a rare type of pancreatic tumor that secretes insulin, which lowers the levels of sugar in the blood. Research indicates that only 10% of insulinomas are cancerous. Surgery is the only option for survival of insulinoma and 90% success rate is assured.
The resulting overabundance of cells can amass and form a tumor. The most common type of pancreatic cancer is adenocarcinoma, which occurs in the exocrine cells that line the ducts of the pancreas. Research on pancreatic cancer causes is still underway, and there is still much to be learned about the reasons for cellular DNA mutations. Some current theories focus on: