Normally, levels of AST in the blood are low. Very high levels of AST (more than 10 times normal) are usually due to acute hepatitis, sometimes due to a viral infection. With acute hepatitis, AST levels usually stay high for about 1-2 months but can take as long as 3-6 months to return to normal.
A Baltimore mechanic named Charles Moncky invented the monkey wrench around 1858. The tool was originally named by using a âpurposeful misspellingâ of its inventorâs name, according to the Ferris State University Jim Crow Museum.
James Spangler. James Spangler invented a portable electric vacuum cleaner-the Hoover Vacuum Cleaner. In 1907, James Spangler, a janitor working in a Canton, Ohio department store, deduced that the carpet sweeper he used on the job was the source of his cough.illiam H. Hoover was so impressed with the vacuum cleaner that his wife bought that Hoover bought into Spangler's business and patents, becoming the president of the Electric Suction Sweeper Company. William Hoover renamed the company the Hoover Company in 1922.