...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of food engineering >The Effect of Phase Transitions on Release of n-Propanol Entrapped in Carbohydrate Glasses
【24h】

The Effect of Phase Transitions on Release of n-Propanol Entrapped in Carbohydrate Glasses

机译：相变对糖玻璃中正丙醇释放的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The mobility of an organic volatile probe (1-n-propanol), incorporated in two types of amorphous carbohydrate glasses, was evaluated by measuring probe retention as a function of time. Retention was found to depend on temperature, moisture content and the degree of matrix collapse. In sucrose glasses, crystallization and probe release occur simultaneously and both crystallization and release depend on the temperature above T_g, as predicted by the William-Landel-Ferry (WLF) equation. In sucrose :raffinose systems held above T_g, initial rapid release of the probe ('fast'release) is observed, coinciding with, and presumably due to, matrix flow during collapse, followed by a much slower diffusional release. Relaxation times for collapse (τ_c), and 'fast' release (τ_(FR)) above T_g were calculated. They were found to be dependent on T— T_g and moisture content. Dependence of relaxation times on (T— T_g) was found to be well predicted by the WLF equation.
机译：通过测量随时间变化的探针保留率，评估了掺入两种类型的无定形碳水化合物玻璃中的有机挥发性探针（1-正丙醇）的迁移率。发现保留率取决于温度，水分含量和基质崩解的程度。在蔗糖玻璃中，结晶和探针释放同时发生，并且结晶和释放都取决于高于T_g的温度，如William-Landel-Ferry（WLF）方程所预测。在保持在T_g以上的蔗糖：棉子糖体系中，观察到探针的初始快速释放（“快速”释放），与塌陷期间的基质流动相吻合，并且大概是由于基质流动，随后是缓慢得多的扩散释放。计算出塌陷（τ_c）和高于T_g的“快速”释放（τ_（FR））的松弛时间。发现它们取决于T_T_g和水分含量。发现通过WLF方程很好地预测了弛豫时间对（TT_g）的依赖性。

著录项

  • 来源
    《Journal of food engineering》 |1995年第1期|p.1-13|共13页
  • 作者

    Guy Levi; Marcus Karel;

  • 作者单位

    Department of Food Science and Center for Advanced Food Technology, Rutgers University, PO Box 231, New Brunswick, New Jersey 08903-0231, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 食品工业;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号