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http://dx.doi.org/10.3746/jkfn.2008.37.8.1025

High Quality Green Tea Extract Production from Enzyme Treated Fresh Green Tea Leaves  

Lee, Lan-Sook (Korea Food Research Institute)
Cha, Hwan-Soo (Korea Food Research Institute)
Park, Jong-Dae (Korea Food Research Institute)
Yi, Sung-Hun (Korea Food Research Institute)
Kim, Sang-Hee (Korea Food Research Institute)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.37, no.8, 2008 , pp. 1025-1029 More about this Journal
Abstract
Fresh green tea leaf extracts were prepared by different enzyme treatment conditions, such as concentration, treating time and treating temperature using complex enzyme, Rapidase TF, and then extracted for 30 min at $80^{\circ}C$ to investigate their physicochemical properties. The results showed that free sugar content in every sample tended to increase, especially glucose content was increased up to 7.25 times compared to the control. Total amino acid was barely affected by the enzyme treatment and caffeine content was increased with reaction temperature. Total polyphenol and total catechin content was increased according to the amount of enzyme added and reaction temperature. Regardless of enzyme treatment conditions, composition of catechins were epigallocatechin, epicatechin, epicatechin gallate and epigallocatechin gallate by descending order of the content. Gallic acid content increased up to 0.04% and $45^{\circ}C$ with no further significant changes thereafter. From the results above, we could conclude that a simple and new method to extract green tea materials directly from fresh green tea leaves with improved extract ratio may be introduced by adding $0.08{\sim}0.1%$ of Rapidase TF to heat treated fresh green tea leaves and keeping temperature at $37{\sim}45^{\circ}C$ for $180{\sim}240\;min$ in order to skip existing complicated procedures.
Keywords
fresh tea leaf; extract; physicochemical properties; enzyme; Rapidase TF;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Chen ZY, Chan PT. 1996. Antioxidant activity of green tea catechins in canola oil. Chem Phys Lipids 82: 163-172   DOI   ScienceOn
2 Kim CM, Choi JH, Oh SK. 1983. Chemical change of major tea constituents during tea manufacture. J Korean Soc Food Nutr 12: 99-104
3 Lu MJ, Chen C. 2008. Enzymatic modification by tannase increases the antioxidant activity of green tea. Food Res Int 41: 130-137   DOI   ScienceOn
4 Kim SH, Han DS, Park JD. 2004. Changes of some chamical compounds of Korean (Posong) green tea according to harvest periods. Korean J Food Sci Technol 36: 542-546   과학기술학회마을
5 Kirishnamurthi KK. 1993. Proceedings of international seminar on green tea. Korean Society of Food Science and Technology. Seoul, Korea
6 Song JM, Park KD, Lee KH, Byun YH, Park JH, Kim SH, Kim JH, Seong BL. 2007. Biological evaluation of anti-influenza viral activity of semi-synthetic catechin derivatives. Antivir Res 76: 178-185   DOI   ScienceOn
7 Higdon JV, Frei B. 2003. Tea catechins and polyphenols: health effects, metabolism, and antioxidant functions. Crit Rev Food Sci Nutr 43: 89-143   DOI   ScienceOn
8 Wang L-F. 2000. Effects of processing and storage on flavanols and sensory qualities of green tea beverage. PhD Dissertation. Cornell University, NY. p 13-14
9 Battestin V, Macedo GA, De Freitas VAP. 2008. Hydrolysis of epigallocatechin gallate using a tannase from Paecilomyces variotii . Food Chem 108: 228-233   DOI   ScienceOn
10 Nakabayashi T, Ina K, Sakata K. 1994. Chemistry and function of green, black and oolong tea. Kogagu Press, Kawasaki, Japan
11 Khan SM, Kour G. 2007. Subacute oral toxicity of chlorpyriphos and protective effect of green tea extract. Pestic Biochem Phys 89: 118-123   DOI   ScienceOn
12 Keast RS, Riddell LJ. 2007. Caffeine as flavor additive in soft-drinks. Appetite 49: 255-259   DOI   ScienceOn
13 Matsuzaki TL, Hara Y. 1985. Antioxidative activity of the leaf catechins. J Agric Chem Soc J apan 59: 129-134
14 Yoshioka H, Sugiura K, Kawahara R, Hujita T, Makino M, Kamiya M, Tsuyumu S. 1991. Formation of radicals and chemiluminescence during the autoxidation of the catechins. Agric Biol Chem 55: 2717-2723   DOI
15 Mohan KV, Gunasekaran P, Varalakshmi E, Hara Y, Nagini S. 2007. In vitro evaluation of the anticancer effect of lactoferrin and tea polyphenol combination on oral carcinoma cells. Cell Biol Int 31: 599-608   DOI   ScienceOn
16 Lee LS, Cha HS, Park JD, Jang DJ, Kim SH. 2008. Physicochemical properties of mushroom (Flammulina velutipes) cultivated with green tea. J Korean Soc Food Sci Nutr 37: 190-194   과학기술학회마을   DOI   ScienceOn
17 Tang S, Kerry JP, Sheehan D, Buckley DJ, Morrissey PA. 2001. Antioxidative effect of added tea catechins on susceptibility of cooked red meat, poultry and fish patties to lipid oxidation. Food Res Int 34: 651-657   DOI   ScienceOn
18 Lee JW, Do JH. 2005. Market trend of health functional food and prospect of ginseng market. J Ginseng Res 29: 206-214   DOI   ScienceOn
19 Ikegaya K, Takayanagi H, Anan T. 1990. Quantitative analysis of tea constituents. Bull Natl Res Tea 71: 43-74
20 SAS/STATTM User's Guide Release. 1988. SAS Institute, Cary, NC, USA
21 Lekha PK, Lonsane BK. 1997. Production and application of tannin acyl hydrolase. Adv Appl Microbiol 44: 215-260   DOI
22 Kim JT. 1996. Science and culture of tea. Borimsa Publishing Co., Seoul, Korea
23 Miao Y L, Shi LH, Lei ZL, Huang JC, Yang JW, Yang YC, Sun QY, Chen DY. 2007. Effect of caffeine on in vivo and in vitro oocyte maturation in mice. Theriogenology 68: 640-645   DOI   ScienceOn
24 Higgins GA, Grzelak ME, Pond AJ, Cohen-Williams ME, Hodgson RA, Varty GB. 2007. The effect of caffeine to increase reaction time in the rat during a test of attention is mediated through antagonism of adenosine $A_{2A}$ receptors. Behav Brain Res 185: 32-42   DOI   ScienceOn