Journals / Tarım Bilimleri Dergisi / 2009 / Cilt: 15 - Sayı: 04

Antioxidant and Antibacterial Activities of Various Extracts and Fractions of Fresh Tea Leaves and Green Tea

Taze Çay Yaprağı ve Yeşil Çayın Ekstrakt ve Fraksiyonlarının Antioksidan ve Antibakteriyel Etkileri

Pages
371–378
Publication Date
2009-11-01
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Crude extract of FTL were also effective on S. aureus

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Polyphenol content, polyphenol yield, antioxidant and antibacterial activities of methanol, ethanol and water extracts and their crude, ethyl acetate and water fractions derived from fresh tea leaves FTL and green tea GT were evaluated.
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Key Findings & Data:Ethyl acetate fractions of ethanolic extracts contained the highest polyphenol content in FTL and GT samples 680.2 and 560.8 mg gallic acid equivalent g-1 dry extract, respectively .
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Conclusion & Impact:Crude extract of FTL were also effective on S. aureus
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Çay · ekstraksiyon · fraksiyon

Abstract

Polyphenol content, polyphenol yield, antioxidant and antibacterial activities of methanol, ethanol and water extracts and their crude, ethyl acetate and water fractions derived from fresh tea leaves FTL and green tea GT were evaluated. Ethyl acetate fractions of ethanolic extracts contained the highest polyphenol content in FTL and GT samples 680.2 and 560.8 mg gallic acid equivalent g-1 dry extract, respectively . For each of 3 extraction solvents, ethyl acetate fractions always had highest polyphenol content, for both teas. Ethyl acetate fractions of water extracts of FTL and GT had highest antioxidant activity 80.8 and 78.6 g ascorbic acid 100g-1 dry extract . A rather high correlation coefficient R2 = 0.9376 for FTL and 0.9783 for GT was obtained between antioxidant activity to total polyphenol content for both tea. Ethyl acetate fractions of extracts showed antibacterial activity on S. aureus and B. cereus. Crude extract of FTL were also effective on S. aureus

Özet

Taze çay yaprağı FTL ve yeşil çayın GT metanol, etanol ve su ham ekstraktları ile bu ekstraktların etil asetat ve su fraksiyonlarının polifenol içeriği, polifenol verimi, antioksidan ve antimikrobiyel aktiviteleri belirlenmiştir. FTL ve GT örneklerinde etanol ekstraktlarının etil asetat fraksiyonunun en yüksek düzeyde polifenol içerdiği sırasıyla 680.2 ve 560.8 mg gallik asit eşdeğeri g-1 belirlenmiştir. Her üç ekstraksiyon solventinde de etil asetat fraksiyonu en yüksek polifenol içeriğine sahiptir. En yüksek antioksidatif aktiviteyi FTL ve GT’nın su ekstraktlarının etil asetat fraksiyonu göstermiştir sırasıyla 80.8 ve 78.6 g askorbik asit eşdeğeri 100 g-1 kuru ekstrakt . FTL ve GT örneklerinin antioksidan aktivitesi ile toplam fenolik madde miktarı arasında oldukça yüksek sırasıyla R2 = 0.9376 ve 0.9783 bir korelasyon mevcuttur. Her iki çay örneğinin etil asetat fraksiyonu S. aureus ve B. cereus üzerinde antibakteriyel etki gösterirken FTL’nin ham ekstraktı S. aureus üzerinde etki göstermiştir

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Cite This Article

EROL, N., SARI, F., POLAT, G., VELİOĞLU, Y. S. (2009). Antioxidant and Antibacterial Activities of Various Extracts and Fractions of Fresh Tea Leaves and Green Tea. Tarım Bilimleri Dergisi, Cilt: 15 - Sayı: 04, 371–378. https://ajindex.com/articles/178890

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References (13)

  1. Alzoreky, N.S. and K. Nakahara. 2003. Antibacterial activity of extracts from some edible plants commonly consumed in Asia. International Journal of Food Microbiology 80: 223-230.
  2. An, B., J. Kwak, J. Son, J. Park, J.C. Lee and M. Byun. 2004. Biological and anti-microbial activity of irradiated green tea polyphenols. Food Chemistry 88: 549-555.
  3. Bu-Abbas, A., E. Copeland, M. N. Clifford, R. Walker and C. Ioannides. 1997.Fractionation of green tea extracts: correlation of antimutagenic effect with flavanol content. Journal of the Science of Food and Agriculture 75: 453- 462. Canadanovic-Brunet, J.M., S.M. Djilas and G.S. Cetkovic. 2005. Free-radical scavenging activity of wormwood (Artemisia absinthium) extracts. Journal of the Science of Food and Agriculture 85: 265-272.
  4. Chan, E.W.C., Y.Y. Lim and Y.L. Chew. 2007. Antioxidant activity of Camellia sinensis leaves and tea from a lowland plantation in Malaysia. Food Chemistry 102: 1214-1222.
  5. Chen, Z., S. Wang, K.M.S. Lee, Y. Huang and W.K.K. Ho. 2001. Preparation of flavanol-rich green tea extract by precipitation with AlCl3. Journal of the Science of Food and Agriculture 81: 1034-1038.
  6. Chou, C., L. Lin and K. Chung. 1999. Antimicrobial activity of tea as affected by the degree of fermentation and manufacturing season. International Journal of Food Microbiology 48: 125-130.
  7. Clifford, M.N., E.L. Copeland, J.P. Bloxsidge and L.A. Mitchell. 2000. Hippuric acid as a major excretion product associated with black tea consumption. Xenobiotica 30: 317-326.
  8. Dupont, S., N. Caffin, B. Bhandari and G.A. Dykes. 2006. In vitro antibacterial activity of Australian native herb extracts against food-related bacteria. Food Control 17: 929-932.
  9. Farhoosh, R. G.A. Golmovahhed and M.H.H. Khodaparast. 2007. Antioxidant activity of various extracts of old tea leaves and black tea wastes (Camellia sinensis L.). Food Chemistry 100: 231-236.
  10. Gramza, A and J. Korczak. 2005. Tea constituents (Camellia sinensis L.) as antioxidants in lipid systems. Trends in Food Science and Technology 16: 351-358.
  11. Halder, B., S. Pramanick, S. Mukhopadhyoy and A.K. Giri. 2005. Inhibition of benzo[a]pyrene induced mutagenicity and genotoxicity multiple test systems. Food and Chemical Toxicology 43: 591-597.
  12. Jayaprakasha, G.K., T. Selvi and K.K. Sakariah. 2003. Antibacterial and antioxidant activities of grape (Vitis vinifera) seed extracts. Food Research International 36: 117-122.
  13. Larger, P.J., A.D. Jones and C. Dacombe. 1998. Separation of tea polyphenols u