Search results for "Physical aging"
showing 3 items of 3 documents
Sugar reduction in extruded cereal based products : impact of water content on the structure and molecular dynamics in such material
2019
Low-moisture biopolymer-based systems are commonly encountered in food. Obviously, understanding the physical basis of their quality: e.g texture, or performance over time or as a function of their composition is of primary importance. The objectives of this work were to evaluate how the presence of sucrose and water content affects physico-chemical properties. The physical stability of these materials were monitored through an insight at different molecular scales. Then the relations between the multi-scale studies were investigated. The effect of sucrose (0–20%) and feed water (10 and 15%) on extrusion blends was studied using a twin screw extruder under the same processing settings. The …
Portret staruszki w rosyjskiej memuarystyce kobiecej XIX wieku
2017
Portrayal of an old woman in the memoirs written bythe nineteenth century Russian womenIn the present article has been analysed portrayals of older women which appear in the memoirs of the nineteenth century Russian women writers. J. Sushkova, A. Kern and A. Smirnova-Rosset in their memoirs most often depict remarkable family members such as grandmothers and aunts, family friends. They focus on the analysis of their personalities, spiritual values and kind-heartedness rather than their physical appearance and signs of physical aging. Among the old ladies portrayed in the memoirs we encounter pious women, wise, experienced, understanding and hospitable women as well as overbearing women or …
Effect of physical aging on the low-frequency vibrational density of states of a glassy polymer
2003
The effects of the physical aging on the vibrational density of states (VDOS) of a polymeric glass is studied. The VDOS of a poly(methyl methacrylate) glass at low-energy (<15 meV), was determined from inelastic neutron scattering at low-temperature for two different physical thermodynamical states. One sample was annealed during a long time at temperature lower than Tg, and another was quenched from a temperature higher than Tg. It was found that the VDOS around the boson peak, relatively to the one at higher energy, decreases with the annealing at lower temperature than Tg, i.e., with the physical aging.