1 AR-The standard Mallinckrodt grade of analytical reagents; suitable for laboratory and general use. 2  If the reagent also meets the requirements of the American Chemical Society Committee on Analytical Reagent, it will be denoted as an AR (ACS) reagent.
Clint Eastwood (May 31st, 1930), the American actor, director and producer has won 4 Oscars:-1992: Oscar to the Best Director and Oscar to the Best Picture for 'Unforgiven'.-1992: Oscar to the Best Director and Oscar to the Best Picture for 'Million Dollar Baby'.
And poor Peter O'Toole and Richard Burton -- they each were nominated 7 times, but never won. Only five actors have managed the feat of winning back-to-back Oscars, in other words, winning Oscars two years in a row ... they include Tom Hanks, Spencer Tracy, Luise Rainer, Katharine Hepburn, and Jason Robards.