Parents can also play an important role, she suggests, by producing sure all their child’s caregivers are aware of the AAP’s guidance regarding screen time. .. AAP recommends limiting display screen period to 2 hours per day for preschool-age children The American Academy of Pediatrics recommends that parents limit combined screen time from television, DVDs, computers, and video gaming to 2 hours per day for preschool-age children. In a report soon to be released in The Journal of Pediatrics, researchers found that many children face screen time both at home and while at child care, with 66 percent exceeding the recommended daily quantity.Upon I/R, the hearts from DLA treated rats showed a reduced ratio of IA/AAR in a dose-dependent manner compared to those from saline treated rats . However, the ratios of AAR/LA were the same in all I/R groups no matter DLA treatment or not, indicating an identical tension and keeping the ligature among the groupings .Figure 1: DLA administration diminishes I/R-induced infarct.A, Representative images of myocardial tissue sections stained with TTC and Evans blue. The non-ischemic area is indicated by blue, the AAR by red and the IA by white.