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Matcha Tea: Analysis of Nutritional Composition, Phenolics and Antioxidant Activity
T. Koláčková, K. Kolofiková, I. Sytařová, L. Snopek, D. Sumczynski, J. Orsavová,
Jazyk angličtina Země Nizozemsko
Typ dokumentu časopisecké články
Grantová podpora
No. IGA/FT/2019/004
Univerzita Tomáše Bati ve Zlíně
- MeSH
- antioxidancia * MeSH
- čaj MeSH
- chlorofyl a * MeSH
- fenoly MeSH
- flavonoidy MeSH
- rostlinné extrakty MeSH
- Publikační typ
- časopisecké články MeSH
Matcha was analysed for its chemical composition, fibre, vitamin C, caffeine and chlorophyll contents. Flavonoids and phenolics, phenolic profiles and antioxidant activity both in water and methanol solutions were determined. In vitro digestibility was established. To understand the contribution of individual substances to antioxidant activity or digestibility their mutual correlations were evaluated. Crude fibre (10.7-17.5%), neutral-detergent fibre (30.7-42.8%) and organic matter digestibility values (59.4-69.7%) showed positive correlations, in contrast to protein contents (20.3-35.0%). It seems that chlorophyll b was a stronger contributor to antioxidant activity than chlorophyll a. The highest contents of flavonoids (99-139 mg RE/g) and phenolics (169-273 mg GAE/g) were determined in methanol fractions. High concentrations of chlorogenic (up to 4800 μg/g), sinapic (up to 1400 μg/g) and gallic acids (up to 423 μg/g) were recorded. Kaempferol and rutin were not proved as significant contributors to antioxidant activity.
Citace poskytuje Crossref.org
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- $a Koláčková, Tereza $u Department of Food Analysis and Chemistry, Tomas Bata University in ZlínNáměstí T.G, Masaryka 5555, 760 01, Zlín, Czech Republic.
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- $a Matcha was analysed for its chemical composition, fibre, vitamin C, caffeine and chlorophyll contents. Flavonoids and phenolics, phenolic profiles and antioxidant activity both in water and methanol solutions were determined. In vitro digestibility was established. To understand the contribution of individual substances to antioxidant activity or digestibility their mutual correlations were evaluated. Crude fibre (10.7-17.5%), neutral-detergent fibre (30.7-42.8%) and organic matter digestibility values (59.4-69.7%) showed positive correlations, in contrast to protein contents (20.3-35.0%). It seems that chlorophyll b was a stronger contributor to antioxidant activity than chlorophyll a. The highest contents of flavonoids (99-139 mg RE/g) and phenolics (169-273 mg GAE/g) were determined in methanol fractions. High concentrations of chlorogenic (up to 4800 μg/g), sinapic (up to 1400 μg/g) and gallic acids (up to 423 μg/g) were recorded. Kaempferol and rutin were not proved as significant contributors to antioxidant activity.
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- $a Orsavová, Jana $u Tomas Bata University in Zlín, Language Centre, Štefánikova 5670, 760 01, Zlín, Czech Republic.
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