Water-dependent thermal transitions in quinoa embryos

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...

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Autor principal: Matiacevich, S.B
Otros Autores: Castellión, M.L, Maldonado, S.B, Buera, M.P
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2006
Acceso en línea:Registro en Scopus
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Registro en la Biblioteca Digital
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100 1 |a Matiacevich, S.B. 
245 1 0 |a Water-dependent thermal transitions in quinoa embryos 
260 |c 2006 
270 1 0 |m Buera, M.P.; Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Av. Intendente Guiraldes s/n, C1428EHA Buenos Aires, Argentina; email: pilar@di.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a 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.  |l eng 
536 |a Detalles de la financiación: Universidad de Buenos Aires, EX 226, EX 274 
536 |a Detalles de la financiación: Agencia Nacional de Promoción Científica y Tecnológica 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas, PIP 02374 
536 |a Detalles de la financiación: We thank financial support from CONICET (PIP 02374), ANPCYT and Universidad de Buenos Aires (EX 226 and EX 274). We specially thank Drs. Daniel Bertero and Fabio Causin for providing the seeds. 
593 |a Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Av. Intendente Guiraldes s/n, C1428EHA Buenos Aires, Argentina 
593 |a 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 
690 1 0 |a CHENOPODIUM QUINOA 
690 1 0 |a DIFFERENTIAL SCANNING CALORIMETER (DSC) 
690 1 0 |a PROTEINS 
690 1 0 |a THERMAL TRANSITIONS 
690 1 0 |a ATMOSPHERIC HUMIDITY 
690 1 0 |a DIFFERENTIAL SCANNING CALORIMETRY 
690 1 0 |a GLASS TRANSITION 
690 1 0 |a ISOTHERMS 
690 1 0 |a PROTEINS 
690 1 0 |a THERMAL EFFECTS 
690 1 0 |a CHENOPODIUM QUINOA 
690 1 0 |a PROTEIN DENATURATION 
690 1 0 |a THERMAL TRANSITIONS 
690 1 0 |a BIODIVERSITY 
700 1 |a Castellión, M.L. 
700 1 |a Maldonado, S.B. 
700 1 |a Buera, M.P. 
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