DNase Test. DNase agar is a differential medium that tests the ability of an organism to produce an exoenzyme, called deoxyribonuclease or DNase, that hydrolyzes DNA.DNase agar contains nutrients for the bacteria, DNA, and methyl green as an indicator.Methyl green is a cation which binds to the negatively-charged DNA.Nase agar is a differential medium that tests the ability of an organism to produce an exoenzyme, called deoxyribonuclease or DNase, that hydrolyzes DNA.
In 1959, the NCAA goalposts were widened to 23 feet 4 inches (7.11 m), the standard width for high school posts today. In 1991, the college goalposts were reduced in width to 18 feet 6 inches (5.64 m), matching the width of NFL goal posts. For the 1991 and 1992 seasons, this meant potentially severe angles for short field goal attempts, since the hashmarks were still located 53 feet 4 inches (16.26 m) apart.
1967 sling-shot goal posts (with one curved support from the ground) were made standard in the NFL. 1974 The goal posts were moved from the goal line to the end lines and the uprights would be extended to 30 feet above the crossbar in an effort to decrease the number of field goals.