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Wang J, Zareef M, He P, Sun H, Chen Q, Li H, Ouyang Q, Guo Z, Zhang Z, Xu D. Evaluation of matcha tea quality index using portable NIR spectroscopy coupled with chemometric algorithms. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:5019-5027. [PMID: 30977141 DOI: 10.1002/jsfa.9743] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 04/07/2019] [Accepted: 04/09/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND The study reports a portable near infrared (NIR) spectroscopy system coupled with chemometric algorithms for prediction of tea polyphenols and amino acids in order to index matcha tea quality. RESULTS Spectral data were preprocessed by standard normal variate (SNV), mean center (MC) and first-order derivative (1st D) tests. The data were then subjected to full spectral partial least squares (PLS) and four variable selection algorithms, such as random frog partial least square (RF-PLS), synergy interval partial least square (Si-PLS), genetic algorithm-partial least square (GA-PLS) and competitive adaptive reweighted sampling partial least square (CARS-PLS). RF-PLS was established and identified as the optimum model based on the values of the correlation coefficients of prediction (RP ), root mean square error of prediction (RMSEP) and residual predictive deviation (RPD), which were 0.8625, 0.82% and 2.13, and 0.9662, 0.14% and 3.83, respectively, for tea polyphenols and amino acids. The content range of tea polyphenols and amino acids in matcha tea samples was 8.51-14.58% and 2.10-3.75%, respectively. The quality of matcha tea was successfully classified with an accuracy rate of 83.33% as qualified, unqualified and excellent grade. CONCLUSION The proposed method can be used as a rapid, accurate and non-destructive platform to classify various matcha tea samples based on the ratio of tea polyphenols to amino acids. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Jingjing Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Muhammad Zareef
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Peihuan He
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Hao Sun
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Quansheng Chen
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Huanhuan Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Qin Ouyang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Zhiming Guo
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Zhengzhu Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
| | - Delian Xu
- National Tea Industry Technology System, Comprehensive Experimental Station of Wuxi, Wuxi, China
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Sugahara S, Chiyo A, Fukuoka K, Ueda Y, Tokunaga Y, Nishida Y, Kinoshita H, Matsuda Y, Igoshi K, Ono M, Yasuda S. Unique antioxidant effects of herbal leaf tea and stem tea from Moringa oleifera L. especially on superoxide anion radical generation systems. Biosci Biotechnol Biochem 2018; 82:1973-1984. [PMID: 29993353 DOI: 10.1080/09168451.2018.1495552] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
This study aimed to investigate the unique antioxidative effects of Japanese moringa products, herbal leaf tea and stem tea, using established free radical assays, focusing on superoxide anion (O2-) radical generation systems. Hot-water extracts from moringa teas resulted in different but lower scavenging activities than Trolox in four synthetic free radical models. Interestingly, these extracts further showed higher O2- radical scavenging effects than Trolox in the phenazine methosulfate-NADH-nitroblue tetrazolium and xanthine oxidase assay systems. Incubating human neutrophils in the presence of these tea extracts rather than Trolox effectively suppressed cellular O2- radical generation. Among the eight known phenolic constituents of moringa leaves, caffeic acid and chlorogenic acid may be responsible for the O2-specific radical scavenging capacity stronger than that of Trolox. These results suggest that moringa herbal teas are a good source of natural antioxidants for preventing O2- radical-mediated disorders. Abbreviations: O2-: superoxide anion; ROS: reactive oxygen species; H2O2: hydrogen peroxide; XOD: xanthine oxidase; DPPH: 1,1-diphenyl-2-picrylhydrazyl; ABTS+: 2,2'-azinobis(2-ethylbenzothiazoline-6-sulfonic acid) cation; CPZ+: chlorpromazine cation; PMS: phenazine methosulfate; NBT: nitroblue tetrazolium; PMA: phorbol 12-myristate 13-acetate.
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Affiliation(s)
- Shintaro Sugahara
- a Graduate School of Bioscience , Tokai University , Kumamoto City , Japan
| | - Akihiro Chiyo
- b School of Agriculture , Tokai University , Kumamoto City , Japan
| | - Koki Fukuoka
- b School of Agriculture , Tokai University , Kumamoto City , Japan
| | - Yuto Ueda
- a Graduate School of Bioscience , Tokai University , Kumamoto City , Japan
| | - Yuki Tokunaga
- c Graduate School of Agriculture , Tokai University , Kumamoto City , Japan
| | - Youichirou Nishida
- d Research and Development Division , Aso Pharmaceutical Co., Ltd , Kumamoto , Japan
| | - Hideki Kinoshita
- b School of Agriculture , Tokai University , Kumamoto City , Japan.,c Graduate School of Agriculture , Tokai University , Kumamoto City , Japan
| | - Yasushi Matsuda
- b School of Agriculture , Tokai University , Kumamoto City , Japan.,c Graduate School of Agriculture , Tokai University , Kumamoto City , Japan
| | - Keiji Igoshi
- b School of Agriculture , Tokai University , Kumamoto City , Japan
| | - Masateru Ono
- a Graduate School of Bioscience , Tokai University , Kumamoto City , Japan.,b School of Agriculture , Tokai University , Kumamoto City , Japan.,c Graduate School of Agriculture , Tokai University , Kumamoto City , Japan
| | - Shin Yasuda
- a Graduate School of Bioscience , Tokai University , Kumamoto City , Japan.,b School of Agriculture , Tokai University , Kumamoto City , Japan.,c Graduate School of Agriculture , Tokai University , Kumamoto City , Japan
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