The interaction of a fixed time food del
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T. P. S. Oei; G. Singer; D. Jefferys
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Article
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1980
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Springer
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English
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Experiment 1 reported the effects of the interaction of a fixed 1 min delivery schedule and body weight, using schedule-induced self-injection paradigm, in the rate of acquisition of methadone and heroin. Eighty-one rats were assigned to 100% and 80% reduced body weight conditions with and without a