Copper can be mixed with other metals to form alloys, such as bronze (copper and tin) and brass (copper and zinc). Oxidized copper, or copper that has been exposed to air, develops a green coating or âpatinaâ that can be seen on old copper pennies, the Statue of Liberty, and copper roofs.
hepatitis b is an infectious hepatitis caused by the hepatitis b virus hbv this infection has two possible phases 1 acute and 2 chronic acute hepatitis b refers to newly acquired infections affected individuals notice symptoms approximately 1 to 4 months after exposure to the virusepatitis b is an infectious hepatitis caused by the hepatitis b virus hbv this infection has two possible phases 1 acute and 2 chronic acute hepatitis b refers to newly acquired infections affected individuals notice symptoms approximately 1 to 4 months after exposure to the virus
Hepatitis B virus (HBV), a member of the hepadnavirus group, double-stranded DNA viruses which replicate, unusually, by reverse transcription. Hepatitis B virus is endemic in the human population and hyperendemic in many parts of the world.epatitis B virus was originally recognized as the agent responsible for âserum hepatitisâ, the most common form of parenterally transmitted viral hepatitis, and an important cause of acute and chronic infection of the liver. The incubation period of hepatitis B is variable with a range of 1 to 6 months.