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.
History [edit]. Windchill was originally developed by Windchill Technology Inc., which was co-founded by Jim Heppelmann, the current President and CEO of PTC. When PTC acquired Windchill Technology, Heppelmann joined the company as senior vice president. Windchill first launched in 1998 and was promoted as the first to market with an internet based PLM solution.