we have studied the effects of 60-min infusions of dopamine ( da ) , norepinephrine ( ne ) , epinephrine ( e ) , isoproterenol ( iso ) , phenylephrine , phentolamine , and propranolol alone , of 60-min infusions of ne , e , and iso in the presence of propranolol , and of 7-min infusions of iso in the presence of phenylephrine on ffa levels in blood plasma of cows , heifers , and steers fed according to requirements .
C0014563
epinephrine
C0028351
ne