00992naa a2200205 a 450000100080000000500110000800800410001910000200006024500570008026000090013752004800014665000140062665000170064065000100065765300150066765300200068270000180070270000180072077300480073813660652017-06-01       1967    bl ---       0--  u    #d1 aBLACKMON, D. M.  aZinc deficiency in ruminants.h[electronic resource]  c1967  aZinc, a constituent of several important enzyme systems, plays an indispensable role in many biochemical reactions in the body. Although a deficiency of zinc results in many impairments of animal health, only recently has its practical importance been recognized. For years, porcine parakeratosis cost swine producers milliions of dollars annually, until it was discovered that the condition was the result of inadequate dietary zine in many of practical diets in wide usage.  aruminants  aDeficiência  aZinco  aRuminantes  aZinc deficiency1 aMILLER, W. J.1 aMORTON, J. D.  tJournal of Papergv. 537, p. 265-270, 1967.