Ponderosa pine twigs collected from trees used by tassel-eared squirrels as sources of cortical tissue for food contained smaller amounts of monoterpenes than twigs from similar trees not used by the squirrels as food sources. Of the 18 monoterpenes isolated from the twig samples, alpha-pinene was the best single predictor of food source trees. In experiments with captive tassel-eared squirrels, consumption of a preferred food was inversely correlated with the concentration of alpha-pinene added to the food.
°Paste titration method for acidity. de-ashed oxidized starches based on the corrected acidity is believed to be a better approximation to the "real carboxyl content" than calculations based on the uncorrected acidity.
SUMMARY
A dry table wine prepared from Passiflora edulis var. flavicarpa was found to contain the following volatile substances: methyl alcohol, ethyl alcohol, isobutyl alcohol, isobutyl alcohol, active amyl alcohol, n‐hexyl alcohol, 2‐phenethyl alcohol, acetaldehyde, diethyl acetal, 2‐butanone, 2,3‐butanedione, ethyl acetate, ethyl isovalerate, ethyl caproate, ethyl heptanoate, ethyl caprylate, ethyl caprate, ethyl laurate, isobutyl isobutyrate and isoamyl acetate. Probably present are: n‐butanol, ethyl isobutyrate, and n‐hexyl caproate. Gas chromatographic retention times are given for a number of unidentified components of the passion fruit wine volatiles. The compounds responsible, for the typical passion fruit wine aroma remain unidentified.
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