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Acetylcholine concentrations in rat brain: diurnal oscillation |
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| Authors: | I Hanin R Massarelli E Costa |
| Abstract: | A diurnal oscillation of acetylcholine concentrations in rat brain has been demonstrated by gas chromatography. Peak concentrations occur at 2 hours of light, and a trough is seen at 6 hours of darkness. This pattern is observed only in grouped rats, and emerges after at least 18 days of prior conditioning in an environment with controlled light, humidity, and temperature. |
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