کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1388873 | 982825 | 2007 | 10 صفحه PDF | دانلود رایگان |
Isothermal–isobaric molecular dynamics simulations are used to calculate the specific volume of models of trehalose and three amorphous trehalose–water mixtures (2.9%, 4.5% and 5.3% (w/w) water, respectively) as a function of temperature. Plots of specific volume versus temperature exhibit a characteristic change in slope when the amorphous systems change from the glassy to the rubbery state and the intersection of the two regression lines provides an estimate of the glass transition temperature Tg. A comparison of the calculated and experimental Tg values, as obtained from differential scanning calorimetry, shows that despite the predicted values being systematically higher (about 21–26 K), the trend and the incremental differences between the Tg values have been computed correctly: Tg5.3%(w/w) Figure optionsDownload as PowerPoint slide
Journal: Carbohydrate Research - Volume 342, Issue 11, 13 August 2007, Pages 1470–1479