Abstract:
The objective of this research was the determination of color (L, a and b values, hue, chroma and ΔE), chlorophylls, caffeine and water content variation during industrial processing of yerba maté (Ilex paraguariensis Saint Hillarie). For leaves, the greatest variation in color, total chlorophyll concentration (> 80%) and water content (approximately 70%) was found during blanching, operation performed with hot gases at temperatures above 500°C. On the contrary, caffeine loss (about 20%) in leaves mainly occurred during hot air drying, carried out in two stages, with inlet air temperatures about 110°C. Moisture content variation in twigs were more important in the drying steps, the values being strongly dependent on twig diameter.
Registro:
Documento: |
Artículo
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Título: | Color, chlorophyll, caffeine, and water content variation during yerba maté processing |
Autor: | Schmalko, M.E.; Alzamora, S.M. |
Filiación: | College of Exact, Chemical and Life Sciences, National University of Misiones, 1552 Felix de Azara St, Posadas - Misiones, 3300, Argentina Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Buenos Aires, (1428), Argentina
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Palabras clave: | Blanching; Caffeine; Chlorophyll; Color; Drying; Yerba maté; Chlorophyll; Color; Gases; Hot air heating; Thermal effects; Blanching; Drying; colorimetric evaluation; drying; food processing; water content |
Año: | 2001
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Volumen: | 19
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Número: | 3-4
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Página de inicio: | 599
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Página de fin: | 610
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DOI: |
http://dx.doi.org/10.1081/DRT-100103937 |
Título revista: | Drying Technology
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Título revista abreviado: | Dry. Technol.
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ISSN: | 07373937
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CODEN: | DRTED
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07373937_v19_n3-4_p599_Schmalko |
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Citas:
---------- APA ----------
Schmalko, M.E. & Alzamora, S.M.
(2001)
. Color, chlorophyll, caffeine, and water content variation during yerba maté processing. Drying Technology, 19(3-4), 599-610.
http://dx.doi.org/10.1081/DRT-100103937---------- CHICAGO ----------
Schmalko, M.E., Alzamora, S.M.
"Color, chlorophyll, caffeine, and water content variation during yerba maté processing"
. Drying Technology 19, no. 3-4
(2001) : 599-610.
http://dx.doi.org/10.1081/DRT-100103937---------- MLA ----------
Schmalko, M.E., Alzamora, S.M.
"Color, chlorophyll, caffeine, and water content variation during yerba maté processing"
. Drying Technology, vol. 19, no. 3-4, 2001, pp. 599-610.
http://dx.doi.org/10.1081/DRT-100103937---------- VANCOUVER ----------
Schmalko, M.E., Alzamora, S.M. Color, chlorophyll, caffeine, and water content variation during yerba maté processing. Dry. Technol. 2001;19(3-4):599-610.
http://dx.doi.org/10.1081/DRT-100103937