Polymorphonuclear leukocytes (PMN) have been shown to have numerous vasoactive effects, particularly in large artery bioassays. This study shows that rabbit PMN passively release a contractile factor that constricts the coronary vasculature of isolated, Langendorff-perfused rabbit hearts. The mechanism of action of this factor does not involve inhibition of nitric oxide (NO), production of cycl...

The review presents the development of an approach constructing approximate solutions to complicated physics problems, starting from asymptotic series, through optimized perturbation theory, self-similar approximation theory. close interrelation underlying ideas these theories is emphasized. Applications developed are illustrated by typical examples demonstrating that it combines simplicity wit...