Phenol ics

A trace alkaloid, 3,4-dimethoxyphenylethylamine was detected in peyote by means of combined gas chromatography/mass spectroscopy. A chromatogram of the phenolic and the non-phenol ic alkaloids in peyote is given in Figure 12.1... 

Cantarelli, C. 1989. Phenol ics and yeast Remarks concerning fermented beverages. In "Proceedings of the Seventh International Symposium on Yeasts" (A. Martini and A. Vaughn-Martini, eds.), pp. S51-S52. John Wiley Sons, Ltd., New York. 

Table II contains the IC, values obtained from data in Figure 5. As can be seen in this Table, of all the phenol ics tested, rosmarintc acid was the most efficient compound in deactivating the superoxide anion, inhibiting the superoxide dismutase-sensitive NBT reduction by 50 % with a concentration of 33 fiM.

Some fruit and vegetables are stored under atmospheres enriched in CO2 and with reduced levels of O2. These storage conditions have a marked effect on phenolic metabolism and phenolic composition. Thus, Williams pears stored in air accumulate more phenol ics than fruits stored under controlled atmospheres (1% C02-l% O2 and 3% C02-3%02). A controlled atmosphere, then, strongly reduces the ability of pears to synthesise phenolic compounds [153]. 

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