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Fig. 1. Changes in ethanol levels (relative values) in Egyptian fruit bat breath
after they ingested mixtures containing 1% ethanol and fructose, sucrose or
glucose. Ethanol in breath is equal to the integrated area under the peak of
the retention time of ethanol, measured by gas chromatography. Ethanol levels
were affected by the interaction of sugar type and time (RM-ANOVA,
P<0.01). After 70 min, ethanol levels were significantly lower
when bats ingested food+fructose than for either food+sucrose or food+glucose.
Values at time 0 were recorded before the mixtures were administered. Error
bars are 1 s.d. Different letters above the bars denote significant
differences (contrasts with Bonferroni correction, P<0.05).