Abstract
ummaryThe radiation-induced radicals in L-Histidine·HCl monohydrate have been studied with e.s.r. spectroscopy. In the temperature region 170–185 K, an intermediate radical is formed with the unpaired electron located in a π-orbital on the Cα arbon atom, interacting with one α- and two β-protons. The principal values for the α-proton coupling are −11·1, −19·4 and −31·8 gauss. The isotropic splitting constants for the β-protons were 44·3 and 7·0 gauss. The g-value was almost isotropic around 2·0036. The intermediate radical is proposed formed by a deamination process. The formation of the radical is described by first-order kinetics. The activation energy for the process is calculated to 15·9 kcal/mole.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Radiation Biology and Related Studies in Physics, Chemistry and Medicine
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
