Seasonal variations in theaflavin, thearubigin and caffeine contents of argentinian black teas
Thirty‐three Argentinian black tea samples of three grades (BOP, BOPF and PF) obtained fortnightly were examined for their theaflavin (TF), thearubigin (TR) and total and extractable caffeine contents during the 1985/86 season. Total and extractable caffeine contents decreased gradually during most...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
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1988
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 05506caa a22004937a 4500 | ||
|---|---|---|---|
| 001 | PAPER-12025 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518204214.0 | ||
| 008 | 190411s1988 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-84986739839 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Malec, L.S. | |
| 245 | 1 | 0 | |a Seasonal variations in theaflavin, thearubigin and caffeine contents of argentinian black teas |
| 260 | |c 1988 | ||
| 270 | 1 | 0 | |m Malec, L.S.; Departamento de Química Orgánica (Area Bromatología), Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires, 1428, Argentina |
| 506 | |2 openaire |e Política editorial | ||
| 504 | |a (1980) Official Methods of Analysis, , ed, Horwitz W, Association of Official Analytical Chemists, Washington, DC, 13th edn, Official Method 15.024 | ||
| 504 | |a Bhatia, IS, Ullah, MR, Polyphenols of tea—IV—Qualitative and quantitative study of the polyphenols of different organs and some cultivated varieties of tea plant (1968) Journal of the Science of Food and Agriculture, 19, pp. 535-542 | ||
| 504 | |a Biswas, AK, Biswas, AK, Sarkar, AR, Biological and chemical factors affecting the valuations of North–East Indian plain teas—II—Statistical evaluation of the biochemical constituents and their effects on briskness, quality and cash valuations of black teas (1971) Journal of the Science of Food and Agriculture, 22, pp. 196-204 | ||
| 504 | |a Cloughley, JB, , pp. 104-114. , 1978–79 Factors influencing the caffeine content of tea. Rep Tea Res Fnd Central Africa 1978–79, Biochemistry Section; Cloughley, JB, Storage deterioration in Central African tea: Changes in chemical composition, sensory characteristics and price evaluation (1981) Journal of the Science of Food and Agriculture, 32, pp. 1213-1223 | ||
| 504 | |a Hazarika, M, Chakravarty, SK, Mahanta, PK, Studies on thearubigin pigments in black tea manufacturing systems (1984) Journal of the Science of Food and Agriculture, 35, pp. 1208-1218 | ||
| 504 | |a Hilton, PJ, Ellis, RT, Estimation of the market value of Central African tea by theaflavin analysis (1972) Journal of the Science of Food and Agriculture, 23, pp. 227-232 | ||
| 504 | |a Hilton, PJ, Palmer–Jones, R, Relationship between the flavanol composition of fresh tea shoots and the theaflavin content of manufactured tea (1973) Journal of the Science of Food and Agriculture, 24, pp. 813-818 | ||
| 504 | |a Hilton, PJ, Palmer–Jones, R, Ellis, RT, Effects of season and nitrogen fertiliser upon the flavanol composition and tea making quality of fresh shoots of tea (Camellia sinensis L.) in Central Africa (1973) Journal of the Science of Food and Agriculture, 24, pp. 819-826 | ||
| 504 | |a Roberts, EAH, Smith, RF, The phenolic substances of manufactured tea—IX—The spectrophotometric evaluation of tea liquors (1963) Journal of the Science of Food and Agriculture, 14, pp. 689-700 | ||
| 504 | |a Smith, RF, White, GW, Measurement of colour in tea infusions—I—Effects of tea composition on the colour of infusions (1965) Journal of the Science of Food and Agriculture, 16, pp. 205-212 | ||
| 504 | |a Wood, DJ, Roberts, EAH, The chemical basis of quality in tea—III—Correlations of analytical results with tea tasters' reports and valuations (1964) Journal of the Science of Food and Agriculture, 15, pp. 19-25 | ||
| 504 | |a Wood, DJ, Bhatia, IS, Chakraborty, S, Choudhury, MND, Deb, SB, Roberts, EAH, Ullah, MR, The chemical basis of quality in tea—I—Analyses of freshly plucked shoots (1964) Journal of the Science of Food and Agriculture, 15, pp. 8-14 | ||
| 520 | 3 | |a Thirty‐three Argentinian black tea samples of three grades (BOP, BOPF and PF) obtained fortnightly were examined for their theaflavin (TF), thearubigin (TR) and total and extractable caffeine contents during the 1985/86 season. Total and extractable caffeine contents decreased gradually during most of the season after an early rapid increase. TF contents fluctuated following climatic variations, decreasing after rainy periods. Total colour and TF curves were consistent with there being a good linear correlation between them, whereas TR showed erratic fluctuations throughout the whole season. Copyright © 1988 John Wiley & Sons, Ltd |l eng | |
| 593 | |a Departamento de Química Orgánica (Area Bromatología), Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires, 1428, Argentina | ||
| 690 | 1 | 0 | |a BLACK TEA |
| 690 | 1 | 0 | |a CAFFEINE |
| 690 | 1 | 0 | |a MARIA S VIGO |
| 690 | 1 | 0 | |a SEASONAL VARIATIONS |
| 690 | 1 | 0 | |a THEAFLAVIN |
| 690 | 1 | 0 | |a THEARUBIGIN |
| 773 | 0 | |d 1988 |g v. 45 |h pp. 185-190 |k n. 2 |p J. Sci. Food Agric. |x 00225142 |w (AR-BaUEN)CENRE-421 |t Journal of the Science of Food and Agriculture | |
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| 856 | 4 | 0 | |u https://doi.org/10.1002/jsfa.2740450210 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00225142_v45_n2_p185_Malec |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00225142_v45_n2_p185_Malec |y Registro en la Biblioteca Digital |
| 961 | |a paper_00225142_v45_n2_p185_Malec |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 999 | |c 72978 | ||