...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Agricultural and Food Chemistry >ROLE OF CALCIUM AND MAGNESIUM IONS IN THE HARDENING OF PRESSURE-TREATED ROOT VEGETABLES
【24h】

ROLE OF CALCIUM AND MAGNESIUM IONS IN THE HARDENING OF PRESSURE-TREATED ROOT VEGETABLES

机译：钙镁离子在硬化根系蔬菜中的作用

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

We investigated the effect of calcium and magnesium ions on the hardening of Japanese radish by the pressure treatment at 400 MPa. The pectins were separated into the three components. Water-soluble pectin (WP) and hydrochloric acid-soluble pectin (HP) were decreased by the pressure treatment, whereas hexametaphosphate-soluble pectin (PP), which is a metal binding type pectin, was increased. The degree of esterification of WP was decreased by pressurization. Variations with time after pressure release of all pectin fractions and the concentrations df calcium and magnesium ions contained in pectin fractions were small. We studied the hardness of the pressure treated samples by soaking them with or without EGTA and EDTA and the effect of the order reversal of the soaking and the standing. It was found that the magnesium ions had a great influence on the hardness of both non-treated and pressure-treated uncooked samples and that calcium ions affected the hardness of pressure-treated cooked samples. The suppressing effect of the calcium ions on the softening during cooking suggested that the interactions between such components as proteins and hemicellulose were promoted by the calcium ions. The mass transfer processes followed by the collapse of the cell membranes by the pressure treatment are considered to strengthen these interactions. [References: 18]
机译：我们通过400 MPa的压力处理研究了钙和镁离子对日本萝卜硬化的影响。果胶被分成三个部分。通过加压处理，水溶性果胶（WP）和盐酸可溶性果胶（HP）降低，而作为金属结合型果胶的六偏磷酸可溶性果胶（PP）增加。加压降低了WP的酯化度。所有果胶组分压力释放后随时间的变化以及果胶组分中所含钙和镁离子的浓度很小。我们研究了通过在有或没有EGTA和EDTA的情况下浸泡的压力处理样品的硬度，以及浸泡和静置顺序颠倒的影响。发现镁离子对未处理和加压处理的未煮制样品的硬度都有很大的影响，而钙离子影响加压处理的煮制样品的硬度。钙离子对蒸煮过程中软化的抑制作用表明，钙离子促进了蛋白质和半纤维素等成分之间的相互作用。传质过程随后通过压力处理使细胞膜塌陷被认为可以加强这些相互作用。 [参考：18]

著录项

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