CONTENT OF AMINO ACID COMPOSITION AND CHANGE OF TENANE IN TEA LEAF IN THE AZERBAIJAN REPUBLIC
Abstract
It was shown that the scent and taste of tea are determined by the level of protein and amino acid. Certainly, protoingens that make up most part of proteins are noted among amino acids. All of them are considered L-shaped. Green tea mostly consists of proteins. Even the high level protein doesn’t adversely impact the quality of tea yet that of black tea might be negatively influenced by that. Also, its taste will also be worsened by that.
As a result of analysis 16 amino acids and 8 unsubstituted substance was found. The main part of amino acid is taken by teanin. It take 41.3% of Azerbaijan-1, 38.8% of Kolxida types respectively. In all stages of tea leaf processing the decrease of teanin and increase of glutamin is witnessed. Also, the loss of teanin happens during the purification (by 34%) and the fading stages.
As a result of the work carried out, it has been found that the size of the tea leaf particle, the temperature and the extraction time influence the extraction of the theanine. The optimum are: the size of the tea leaf particle is 200–450 mkm, the extraction temperature is 80–85 °C, and the extraction time is 20–25 minutes.
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Guliyev F., Guliyev R. Chaychılıq. [Tea-making]. Bakı, 2014, 559 p. (in Azer.).
Bagirov A. Azerbaijan chayi. [Tea Azerbaijan]. Bakı, 1993, 110 p.(in Azer.).
Dzhakhangirov M.M. Azerbaijan Texnologiya Universitetinin Elmi Xeberleri, 2017, no. 1/23, pp. 26–29. (in Russ.).
Gogiia V.T. Biokhimiia subtropicheskikh rastenii. [Biochemistry of subtropical plants]. Moscow, 1984, 288 p. (in Russ.).
Nuriyev A., Guliyev R. Chayin chimyasi ve texnologiyasi. [Chemistry of chemistry and technology of processing]. Baku, 2008, 122 p. (in Azer.).
Maharramov M. Qida mehsulları texnologiyasının nezeri esasları. [Theoretical basics of food technology]. Baku, 2015, 448 p. (in Azer.).
Skrukhin I.M., Nechaev A.P. Vse o pishche s tochki zreniia khimika. [Everything about food from the point of view of a chemist]. Moscow, 1991, 288 p. (in Russ.).
Jain A., Manghani C., Kohli S., Nigam D., Rani V. Toxicology Letters, 2013, vol. 220(1), pp. 82–87.
Iashin Ia.I., Iashin A.Ia. Khimicheskii sostav chaia i ego vliianie na zdorov'e cheloveka. [The chemical composition of tea and its effect on human health]. Moscow, 2010, 159 p. (in Russ.).
Afonina S.N., Lebedeva E.N. Uspekhi sovremennogo estestvoznaniia, 2016, no. 6, pp. 59–63. (in Russ.).
Deng W., Ogita S., Ashihara H. Phytochemistry Letters, 2008, no. 1, pp. 115–119.
Chen Z.M., Wang H., You X., Xu N. Tea, Bioactivity and Therapeutic Potential, Boca Raton, USA, 2002, pp. 57–88.
Zheng G., Sayama K., Ohkubo T., Juneja L.R., Oguni I. In Vivo, 2004, vol. 18, pp. 55–62.
Desai M.J., Armstrong D.W. Rapid Communications in Mass Spectrometry, 2004, vol. 18, pp. 251–256.
Thippeswamy R., Mallikarjun G., Rao D.H., Martin A, Gowda L.R. Journal of Agricultural and Food Chemistry, 2006, vol. 54, pp. 7014–7019.
Kozarenko T.D., Zuev S.N., Muliar N.F. Ionoobmennaia khromatografiia aminokislot (Teoreticheskie osnovy i praktika). [Ion-exchange chromatography of amino acids (Theoretical foundations and practice)]. Novosibirsk, 1981, 160 p. (in Russ.).
Mokshina N.Ia. Ekstraktsiia i opredelenie aromaticheskikh α-aminokislot i vodorastvorimykh vitaminov – zakonomernosti i novye analiticheskie resheniia: dis. ... doktora khim. nauk. [Extraction and determination of aromatic α-amino acids and water-soluble vitamins - regularities and new analytical solutions: dis. ... Doctor of Chemical Sciences]. Voronezh, 2007, 329 p. (in Russ.).
Henriquez-Aedo K., Vega H.M., Aranda B.M. J. Chil. Chem. Soc., 2013, vol. 58, no. 4, pp. 2168–2171.
Ferda Sari. Çay işlemede teaninin miktarinin degişimi. Doktora tezi. [Change in amount of teanin tea processing. Ph.D. Thesis]. Ankara, 2010, 89 p. (in Turk.).
Ekborg-Ott K.H., Taylor A., Armstrong D.W. Journal of Agricultural and Food Chemistry, 1997, vol. 45, pp. 353–363.
Kvasnička F., Krátká J. Central European Journal of Chemistry, 2006, vol. 4(2), pp. 216–222.
Ding Y., Yu H., Mou S. Journal of Chromatography A., 2002, vol. 982, pp. 237–244.
Wang H.F., Tsai Y.S., Lin M.L., Ou A.S. Food Chemistry, 2006, vol. 96, pp. 648–653.
Chen M. Tea, Bioactivity and Therapeutic Potential, Boca Raton, USA, 2002, pp. 1–17.
Ying Y., Ho J.W., Chen Z.Y., Wang J. Journal of Liquid Chromatography & Related Technologies, 2005, vol. 28, pp. 727–737.
Alcázar A., Ballesteros O., Jurado J.M., Martin M.J., Vilches J.L., Navalon A. Journal of Agricultural and Food Chemistry, 2007, vol. 55, pp. 5960–5965.
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