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Utilizing the mouse tail-flick assay, the rank order of analgesic potency for various opioids (i.c.v.) is beta h-endorphin… Expand The effects of various opiates on the spontaneous release of [3H]dopamine ([3H]DA) continuously formed from [3H]tyrosine has been… Expand A new method for quantifying intestinal transit was evaluated by comparison with two other popular techniques. The distribution… Expand The peripheral administration of morphine1–4 or the intraventricular injection of either Met-enkephalin or D-Ala2-Met… Expand Neurotensin administered intracisternally in mice increased reaction time in the hot plate test (minimum effective dose = 25 ng… Expand Abstract Dopamine concentrations in pituitary stalk plasma ovariectomized rats and ovariectomized, estrogen-treated rats were… Expand The intraventricular injection of D-alanine-methionine-enkephalinamide (D-Ala2-Met-enkephalinamide), a synthetic analog of Met… Expand Beta-Endorphin (0.9--2.0 nmol), morphine (11--250 nmol) and D-ala2-met-enkephalinamide (17--33 nmol) administered… Expand Morphinomimetic peptides were injected into the cisterna magna of chloralosed dogs. Methionine enkepalin (500 microgram/kg i.c… Expand [D-Ala2]-Met-enkephalinamide (DALA), a synthetic enkephalin analog designed by in vitro analysis, binds to opiate receptors… Expand