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- Title
富有机硒抹茶的化学组成、抗氧化活性及其对 DNA 损伤的保护作用...
- Authors
李笑; 闫婷玉; 牛丽丽; 翟盼盼; 张华峰; 杨晓华; 彭元金
- Abstract
In order to elucidate nutritional value, health benefits and their material basis of the novel organic selenium-enriched matcha (OSM), contents of some nutrients (e.g., essential amino acids and trace elements) and bioactive constituents [e.g., epigallocatechin gallate (EGCG)] in 3 kinds of matcha [i.e. organic selenium-enriched matcha, domestic matcha (DM) and imported matcha (IM)] were determined using several instruments such as inductively coupled plasma-optical emission spectrometer. The sensory characteristics of 3 kinds of matcha were analyzed using electronic nose and other methods. Heavy metals and pesticide residues were quantified. In vitro antioxidant capacity as well as protective activity against DNA damage were also studied. The results indicated that content of organic selenium in OSM reached the standard of organic selenium-enrich foods. In particular, selenium concentrations in selenium polysaccharide and selenium protein of OSM were higher than those of DM and IM. In addition, OSM was rich in trace elements such as iron, zinc and strontium. Contents of 3 essential amino acids (i.e. lysine, valine and threonine) and EGCG in OSM were significantly (P<0.05) higher than those in the other 2 kinds of matcha. Lead, arsenic, mercury and cadmium were not detected in OSM and its protein and polysaccharide, and its relative pesticide residues were significantly (P<0.05) lower than those in DM and IM. The sensory characteristics of OSM were better than those of the other 2 kinds of matcha. Moreover, total reducing power, ABTS and DPPH radical-scavenging ability and protective activity against DNA damage of OSM were stronger than those of DM and IM. In conclusion, organic selenium-enriched matcha meets the national food safety standards, possesses high nutritional value and superior sensory characteristics, and exhibits antioxidant capacity and protective activity against DNA damage.
- Publication
Acta Agriculturae Zhejiangensis, 2023, Vol 35, Issue 9, p2222
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.20221253