cis–trans-Isomerization of unsaturated fatty acids during γ-irradiation of barley grains
- 作者：Geiß ; ler ; Christian ; Brede ; Ortwin ; Reinhardt ; Jü ; rgen
- 关键词：Barley grains ; cis&ndash ; trans-Isomerization ; Gamma-irradiation ; Thiyl radicals ; Unsaturated fatty acids
- 刊名：Radiation Physics and Chemistry
- 出版年：2003
- 期刊代码：68_0969806x
- 类别：ph
- 出版时间：June, 2003
- 卷：67
- 期：2
- 页码：105-113
- 文件大小：163 K
摘要
Gamma-irradiating barley grains with doses of 10–100kGy, a dose dependent isomerization of the naturally occurring cis-unsaturated fatty acids such as oleic, cis-vaccenic, linoleic and also of linolenic acid was found. Whereas the effect was negligible up to 10kGy, at 50kGy the trans-fatty acid level became comparable to that of other natural products like butter fat which means that there is no essential nutrition danger. The cis–trans-isomerization found in barley grains is explained mainly by a thiyl radical driven process rather than direct isomerization.