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Matiacevich, S.B.; Castellión, M.L.; Maldonado, S.B.; Buera, M.P. "Water-dependent thermal transitions in quinoa embryos" (2006) Thermochimica Acta. 448(2):117-122
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Abstract:

The water-dependent thermal transitions of the embryos in the mature seeds of Chenopodium quinoa Willd., cv. Baer II were studied by differential scanning calorimetry in order to provide tools for analyzing seed deterioration during storage. For comparative purposes, Guggenheim-Anderson-de Boer (GAB) constants from water sorption isotherms were also obtained from other two cultivars. Glass transition temperatures (Tg), overlapped with lipid melting, could be detected in defatted embryos. Quinoa seeds storage temperature should remain below 0 °C in order to maintain them in a glassy state if relative humidity is higher than 59%. Frozen water was detected in defatted embryos at water contents above 47% (dry basis, d.b.) while protein denaturation occurred even at 5% (d.b.) water content, although at a low extent. The results suggested that protein denaturation, without the requirement of lipid removal, is a potential index to follow seed deterioration during storage. © 2006 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Water-dependent thermal transitions in quinoa embryos
Autor:Matiacevich, S.B.; Castellión, M.L.; Maldonado, S.B.; Buera, M.P.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Av. Intendente Guiraldes s/n, C1428EHA Buenos Aires, Argentina
Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Av. Intendente Guiraldes s/n, C1428EHA Buenos Aires, Argentina
Palabras clave:Chenopodium quinoa; Differential scanning calorimeter (DSC); Proteins; Thermal transitions; Atmospheric humidity; Differential scanning calorimetry; Glass transition; Isotherms; Proteins; Thermal effects; Chenopodium quinoa; Protein denaturation; Thermal transitions; Biodiversity
Año:2006
Volumen:448
Número:2
Página de inicio:117
Página de fin:122
DOI: http://dx.doi.org/10.1016/j.tca.2006.06.016
Título revista:Thermochimica Acta
Título revista abreviado:Thermochim Acta
ISSN:00406031
CODEN:THACA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00406031_v448_n2_p117_Matiacevich

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Citas:

---------- APA ----------
Matiacevich, S.B., Castellión, M.L., Maldonado, S.B. & Buera, M.P. (2006) . Water-dependent thermal transitions in quinoa embryos. Thermochimica Acta, 448(2), 117-122.
http://dx.doi.org/10.1016/j.tca.2006.06.016
---------- CHICAGO ----------
Matiacevich, S.B., Castellión, M.L., Maldonado, S.B., Buera, M.P. "Water-dependent thermal transitions in quinoa embryos" . Thermochimica Acta 448, no. 2 (2006) : 117-122.
http://dx.doi.org/10.1016/j.tca.2006.06.016
---------- MLA ----------
Matiacevich, S.B., Castellión, M.L., Maldonado, S.B., Buera, M.P. "Water-dependent thermal transitions in quinoa embryos" . Thermochimica Acta, vol. 448, no. 2, 2006, pp. 117-122.
http://dx.doi.org/10.1016/j.tca.2006.06.016
---------- VANCOUVER ----------
Matiacevich, S.B., Castellión, M.L., Maldonado, S.B., Buera, M.P. Water-dependent thermal transitions in quinoa embryos. Thermochim Acta. 2006;448(2):117-122.
http://dx.doi.org/10.1016/j.tca.2006.06.016