Caffeoylquinic acids from leaves of Etlingera species (Zingiberaceae)

Effect of solvents in extracting polyphenols and antioxidants of selected raw vegetables

“…To date, the phytochemical and antioxidant evaluations of E. elatior were mainly focused on the rhizome and leaf extracts Chan et al, 2009). Moreover, the comparative antioxidant studies by Andarwulan et al (2010) and Wetwitayaklung et al (2008), respectively revealed a very poor antioxidant activity of its 95% ethanol extract of freeze-dried inflorescence and methanol extract of dried inflorescence.…”

Antioxidant and antibacterial properties of some fresh and dried Labiatae herbs

“…[6] Molybdate reagent was prepared by dissolving 16.5 g sodium molybdate, 8.0 g dipotassium hydrogen phosphate, and 7.9 g potassium dihydrogen phosphate in 1 litre of water. The reagent (2.7 ml) was added to the plant extract (0.3 ml), mixed and incubated at room temperature for 10 min.…”

Antioxidant properties of ginger leaves: An overview

“…[36] CGA content (294 mg CGA/100 g) was found to be significantly higher than flowers of Lonicera japonica or Japanese honeysuckle (173 mg CGA/100 g), the commercial source. Leaves of E. elatior which currently have no economic value, could serve as an alternative source of CGA.…”

“…[35] From the leaves of Etlingera, three caffeoylquinic acids (CQA) including chlorogenic acid have been isolated from leaves of E. elatior. [36] These compounds were reported for the first time in Zingiberaceae. Besides CQA, flavonoids of isoquercitrin, quercitrin and (+)-catechin were also isolated.…”