4.7 Article

Hydrolysable tannins in Terminalia ferdinandiana Exell fruit powder and comparison of their functional properties from different solvent extracts

期刊

FOOD CHEMISTRY
卷 358, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.129833

关键词

Kakadu Plum; Terminalia ferdinandiana; Hydrolysable tannins; Ellagic acid; Vitamin C; Antimicrobial activity; Antioxidant capacity

资金

  1. Cooperative Research Centre for Developing Northern Australia (CRCNA)
  2. Western Australian, Northern Territory and Queensland Governments
  3. Australian Research Council (ARC) Industrial Transformation Training Centre for Uniquely Australian Foods [IC180100045]
  4. Australian Research Council [IC180100045] Funding Source: Australian Research Council

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This study identified and quantified hydrolysable tannins in Kakadu plum fruit, showing high antioxidant properties and strong antimicrobial effects. This indicates that Kakadu plum fruit is a rich source of ellagitannins, ellagic acid, and vitamin C with potential applications in the food, cosmetic, and nutraceutical industries.
This study identified and quantified hydrolysable tannins (HTs) in Terminalia ferdinandiana Exell (Kakadu plum) fruit, freeze dried powder extracted with 80% aqueous acetone (AA) and 80% aqueous acidified ethanol (AAE), using UHPLC-Q/Orbitrap/MS/MS. The vitamin C and ellagic acid were quantified by UHPLC-PDA. A total of seven HTs were identified: corilagin, 3,4,6-tri-O-galloyl-beta-D-glucose, elaeocarpusin, chebulinic acid, chebulagic acid, helioscopin B, and punicalagin, with five classified as ellagitannins. The two extracts AA and AAE, comprised of gallic acid (2.5 and 2.2 mg/g DW), punicalagins alpha and beta (2.8 and 1.3 mg/g DW), respectively, and both contained ellagic acid (similar to 4 g/100 g DW). These extracts showed high antioxidant properties and strong antimicrobial effects against methicillin-resistant Staphylococcus aureus clinical isolate, Staphylococcus aureus, and Shewanella putrefaciens. These results suggest that Kakadu plum fruit is a rich, edible source of ellagitannins, ellagic acid and vitamin C with potential applications in food, cosmetic and nutraceutical industries.

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