Influence of ripeness and drying process on the polyphenols and tocopherols of Pistacia vera L.

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Gabriele BallistreriBiagio Fallico

Abstract

This paper highlights, for the first time, the changes in the phenolics fraction (anthocyanins, flavonoids and stilbenes) and tocopherols of unpeeled Pistacia vera L. var. bianca with ripening, and the effect of the sun-drying process. The total polyphenol levels in pistachios, measured as mg of Gallic Acid Equivalent (GAE), were: 201 +/- 10.1, 349 +/- 18.3 and 184.7 +/- 6.2 mg GAE/100 g DM in unripe, ripe and dried ripe samples, respectively. Most phenolics in ripe pistachios were found to be anthocyanins. They increased with ripening, while the sun drying process caused a susbtantial loss. Flavonoids found in all pistachio samples were daidzein, genistein, daidzin, quercetin, eriodictyol, luteolin, genistin and naringenin, which decreased both with ripening and drying. Before the drying process both unripe and ripe pistachios showed a higher content of trans-resveratrol than dried ripe samples. gamma-Tocopherol was the major vitamin E isomer found in pistachios. The total content (of alpha- and gamma-tocopherols) decreased, both during ripening and during the drying process. These results suggested that unpeeled pistachios can be considered an important source of phenolics, particularly of anthocyanins. Moreover, in order to ...Continue Reading

Citations

Jan 28, 2014·Journal of Agricultural and Food Chemistry·Yuntao LiuC-Y Oliver Chen
Jan 29, 2013·FEMS Microbiology Letters·Carlo BisignanoGiuseppina Mandalari
Jan 5, 2019·Journal of the Science of Food and Agriculture·Abdollatif SheikhiLouise Ferguson
Aug 16, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Karolina PyciaGrażyna Jaworska
Jul 28, 2019·Journal of the Science of Food and Agriculture·Luis Noguera-ArtiagaÁngel A Carbonell-Barrachina
Dec 28, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Karolina PyciaGrażyna Jaworska
Mar 19, 2020·Current Pharmaceutical Design·Ryszard Amarowicz, Ronald B Pegg
Apr 8, 2020·Archives of Pharmacal Research·Anowarul IslamMd Rashedunnabi Akanda
Apr 24, 2021·Frontiers in Plant Science·Chaiwat AneklaphakijTakayuki Tohge
Jan 8, 2020·Journal of Agricultural and Food Chemistry·Romina Bodoira, Damián Maestri

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thermal treatments

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