...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Nuclear Physics, Material Sciences, Radiation and Applications >Radiolysis of Serine in High Radiation Field
【24h】

Radiolysis of Serine in High Radiation Field

机译：丝氨酸在高辐射场中的辐射分解

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The formation of amino acids under simulated condition suggests that this type of compounds were readily formed on the primitive Earth. Nevertheless, there is no conclusive explanation to the origin of their specific chirality in biological systems. Differences in their stability in the primitive conditions may give some clues about this unsolved problem. Protection mechanisms have been considered, such as the adsorption of the organic compounds onto mineral surfaces. By using HPLC/ELSD to analyze aqueous suspensions of serine adsorbed on clay (sodium montmorillonite) and a meteorite (Allende) irradiated in different doses with a cobalt-60 gamma source, the aim of this work was to study the possible protector role of these mineral surfaces when an amino acid, serine, is adsorbed onto them and the system is exposed to a high radiation source. The results showed that adsorption is better at acidic pH and desorption from the mineral at basic pH. The irradiation of the free amino acid destroyed it almost completely at a dose of 91 kGy, but the presence of the mineral abruptly decreases the decomposition, acting as a protective agent. At the same time, the results in aqueous solution show no statistically significant differences in adsorption or radiolysis of D and L serine.
机译：在模拟条件下氨基酸的形成表明这类化合物很容易在原始地球上形成。然而，对于它们在生物系统中的特定手性的起源并没有结论性的解释。它们在原始条件下的稳定性差异可能会提供一些有关此未解决问题的线索。已经考虑了保护机制，例如有机化合物在矿物表面上的吸附。通过使用HPLC / ELSD分析吸附在粘土（蒙脱石钠）和陨石（阿连德）上的丝氨酸的水悬浮液，这些剂量用60钴γ射线源辐照了不同剂量，目的是研究这些可能的保护作用当氨基酸丝氨酸被吸附到矿物表面时，该系统暴露于高辐射源。结果表明，在酸性pH条件下吸附效果更好，而在碱性pH条件下则从矿物中解吸。游离氨基酸的照射以91 kGy的剂量几乎完全破坏了它，但是矿物质的存在突然减少了分解，起到了保护剂的作用。同时，水溶液中的结果显示D和L丝氨酸的吸附或放射分解没有统计学上的显着差异。

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