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'.
Katharine Hepburn was the previous record holder with 12 nominations, and she still holds the record for the most Oscar wins by an actress, with 4 Best Actress trophies. Jack Nicholson is Oscar's most honored male actor, currently with 12 nominations, and 3 Oscar wins, most recently in 1997 for AS GOOD AS IT GETS.