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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
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
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
Volumen:19
Número:3-4
Página de inicio:599
Página de fin:610
DOI: http://dx.doi.org/10.1081/DRT-100103937
Título revista:Drying Technology
Título revista abreviado:Dry. Technol.
ISSN:07373937
CODEN:DRTED
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