The dynamics of water in hydrated white bread investigated using quasielastic neutron scattering
Contribuinte(s) |
Institute of Mathematics & Physics (ADT) Mathematics and Physics |
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Data(s) |
09/12/2008
09/12/2008
2007
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Resumo |
Kargl, Florian; Sj?str?m, J.; Fernandez-Alonso, F.; Swenson, J., (2007) 'The dynamics of water in hydrated white bread investigated using quasielastic neutron scattering', Journal of Physics: Condensed Matter 19 pp.415119 RAE2008 The dynamics of water in fresh and in rehydrated white bread is studied using quasielastic neutron scattering (QENS). A diffusion constant for water in fresh bread, without temperature gradients and with the use of a non-destructive technique, is presented here for the first time. The self-diffusion constant for fresh bread is estimated to be Ds = 3.8 ? 10?10 m2 s?1 and the result agrees well with previous findings for similar systems. It is also suggested that water exhibits a faster dynamics than previously reported in the literature using equilibration of a hydration-level gradient monitored by vibrational spectroscopy. The temperature dependence of the dynamics of low hydration bread is also investigated for T = 280?350 K. The average relaxation time at constant momentum transfer (Q) shows an Arrhenius behavior in the temperature range investigated. Peer reviewed |
Formato |
415119 |
Identificador |
Kargl , F , Sj?str?m , J , Swenson , J & Fernandez-Alonso , F 2007 , ' The dynamics of water in hydrated white bread investigated using quasielastic neutron scattering ' Journal of Physics: Condensed Matter , vol 19 , no. 41 , pp. 415119 . DOI: 10.1088/0953-8984/19/41/415119 0953-8984 PURE: 89427 PURE UUID: 525ab90d-06fd-4b6e-a3cd-d5f7d6275532 dspace: 2160/1469 |
Idioma(s) |
eng |
Relação |
Journal of Physics: Condensed Matter |
Tipo |
/dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article Article (Journal) |
Direitos |