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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2006
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00406031_v448_n2_p117_Matiacevich http://hdl.handle.net/20.500.12110/paper_00406031_v448_n2_p117_Matiacevich |
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paper:paper_00406031_v448_n2_p117_Matiacevich2023-06-08T15:04:35Z Water-dependent thermal transitions in quinoa embryos Matiacevich, Silvia Beatriz Castellión, Martina Laura Buera, María del Pilar 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 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. Fil:Matiacevich, S.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Castellión, M.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Buera, M.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00406031_v448_n2_p117_Matiacevich http://hdl.handle.net/20.500.12110/paper_00406031_v448_n2_p117_Matiacevich |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Matiacevich, Silvia Beatriz Castellión, Martina Laura Buera, María del Pilar Water-dependent thermal transitions in quinoa embryos |
| topic_facet |
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 |
| description |
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. |
| author |
Matiacevich, Silvia Beatriz Castellión, Martina Laura Buera, María del Pilar |
| author_facet |
Matiacevich, Silvia Beatriz Castellión, Martina Laura Buera, María del Pilar |
| author_sort |
Matiacevich, Silvia Beatriz |
| title |
Water-dependent thermal transitions in quinoa embryos |
| title_short |
Water-dependent thermal transitions in quinoa embryos |
| title_full |
Water-dependent thermal transitions in quinoa embryos |
| title_fullStr |
Water-dependent thermal transitions in quinoa embryos |
| title_full_unstemmed |
Water-dependent thermal transitions in quinoa embryos |
| title_sort |
water-dependent thermal transitions in quinoa embryos |
| publishDate |
2006 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00406031_v448_n2_p117_Matiacevich http://hdl.handle.net/20.500.12110/paper_00406031_v448_n2_p117_Matiacevich |
| work_keys_str_mv |
AT matiacevichsilviabeatriz waterdependentthermaltransitionsinquinoaembryos AT castellionmartinalaura waterdependentthermaltransitionsinquinoaembryos AT bueramariadelpilar waterdependentthermaltransitionsinquinoaembryos |
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1768542497088208896 |