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Title: Neutron diffraction investigations of L- and D-alanine at different temperatures: The search for structural evidence for parity violation

Abstract

Single crystal neutron diffraction has been used in an investigation of the structures of the amino acids L- and D-alanine. The aim of the study was to look for proposed phase transitions around T{sub c} {approx} 270 K. Measurements of both structures at 295 K and 60 K - the neutron structure of D-alanine being determined for the first time - show no significant structural basis for this phase transition in alanine. Further, confirmatory, investigation of the structure of D-alanine at temperatures of 240, 250, 260 and 300 K also showed no significant changes in bond lengths or angles. We can thus offer no structural support to other physical measurements, which are indicative of the observable effect of parity violation of the electroweak force in these phase transitions.

Authors:
 [1];  [2];  [3];  [3];  [4]
  1. University of Glasgow/ISIS
  2. ORNL
  3. University of Oxford
  4. Peking University
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
978082
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
New Journal of Chemistry
Additional Journal Information:
Journal Volume: 29; Journal Issue: 1; Journal ID: ISSN 1144-0546
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 59 BASIC BIOLOGICAL SCIENCES; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; AMINO ACIDS; BOND LENGTHS; MONOCRYSTALS; NEUTRON DIFFRACTION; NEUTRONS; PARITY

Citation Formats

Wilson, Chick C, Myles, Dean A A, Ghosh, Minakshi, Johnson, Louise N, and Wang, Wenging. Neutron diffraction investigations of L- and D-alanine at different temperatures: The search for structural evidence for parity violation. United States: N. p., 2005. Web. doi:10.1039/b419295h.
Wilson, Chick C, Myles, Dean A A, Ghosh, Minakshi, Johnson, Louise N, & Wang, Wenging. Neutron diffraction investigations of L- and D-alanine at different temperatures: The search for structural evidence for parity violation. United States. doi:10.1039/b419295h.
Wilson, Chick C, Myles, Dean A A, Ghosh, Minakshi, Johnson, Louise N, and Wang, Wenging. Thu . "Neutron diffraction investigations of L- and D-alanine at different temperatures: The search for structural evidence for parity violation". United States. doi:10.1039/b419295h.
@article{osti_978082,
title = {Neutron diffraction investigations of L- and D-alanine at different temperatures: The search for structural evidence for parity violation},
author = {Wilson, Chick C and Myles, Dean A A and Ghosh, Minakshi and Johnson, Louise N and Wang, Wenging},
abstractNote = {Single crystal neutron diffraction has been used in an investigation of the structures of the amino acids L- and D-alanine. The aim of the study was to look for proposed phase transitions around T{sub c} {approx} 270 K. Measurements of both structures at 295 K and 60 K - the neutron structure of D-alanine being determined for the first time - show no significant structural basis for this phase transition in alanine. Further, confirmatory, investigation of the structure of D-alanine at temperatures of 240, 250, 260 and 300 K also showed no significant changes in bond lengths or angles. We can thus offer no structural support to other physical measurements, which are indicative of the observable effect of parity violation of the electroweak force in these phase transitions.},
doi = {10.1039/b419295h},
journal = {New Journal of Chemistry},
issn = {1144-0546},
number = 1,
volume = 29,
place = {United States},
year = {2005},
month = {9}
}