https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54898 Wed 20 Mar 2024 13:32:26 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39439 Tue 07 Jun 2022 10:28:24 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20620 Sat 24 Mar 2018 07:55:44 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:21294 Camellia sinensis (tea) leaves were determined. Aqueous and organic extracts of freeze-dried fresh (unfermented) and black (fully-fermented) tea leaves were prepared for a structured set of samples (fermented and unfermented teas from six high-, mid- and low-grown plantations; fermented and unfermented teas from two harvesting seasons from four highland plantations), collected from the main tea-growing regions in Sri Lanka. Total catechin content and amounts of individual catechins, flavonols and theaflavins were determined by HPLC. Mean values for the phenolic constituents were generally significantly higher (p < 0.05) with solvent extraction. The mean values for total catechins, total flavonols and caffeine in the aqueous extracts from unfermented teas were 10.6%, 1.5% and 2.9%, respectively. For both unfermented and fermented tea leaves, a significant (p < 0.05) interaction between plantation and season was observed for phenolic constituents. Ferric reducing antioxidant power was positively (p < 0.05) correlated with (-)-epicatechin gallate and total phenolic contents.]]> Sat 24 Mar 2018 07:54:37 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32750 Mon 23 Sep 2019 13:16:28 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55595 Fri 07 Jun 2024 12:22:04 AEST ]]>