Parity violation of electroweak force in phase transitions of single crystals of D- and L-alanine and valine

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	Parity violation of electroweak force in phase transitions of single crystals of D- and L-alanine and valine
	Wang, WQ ; Yi, F ; Ni, YM ; Zhao, ZX ; Jin, XL ; Tang, YQ
刊名	JOURNAL OF BIOLOGICAL PHYSICS
	2000
卷号	26 期号:1 页码:51
关键词	AMINO-ACIDS
ISSN号	0092-0606
中文摘要	Three kinds of experiments have been designed in attempting to observe the parity violation of electroweak force at the phase transition of single crystals of D- and L-alanine and valine. (1) An obvious lambda phase transition at 270 +/- 1 K was shown in the specific heat measurement of alanine and valine enantiomers by differential scanning calorimetry. The biologically dominant L-enantiomer was found to have lower energy. (2) Magnetization of single crystals of D- and L-alanine and D-valine were measured as a function of temperature using the SQUID magnetometer. The difference of the mass susceptibility chi(rho) similar to T curve between the D-alanine and L-alanine is attributable to the variation of intramolecular geometry of chirality density, which is related to the parity violation energy shift of a chiral molecule and is a consequence of the short range of the weak interaction between the nuclei and electrons. (3) Laser Raman spectra of D- and L-alanine at different low temperatures (100 K, 250 K, 260 K, 270 K, 280 K and 290 K) showed that the second order C alpha-H deformation modes at 2606 cm(-1), 2724 cm(-1) of D-alanine vanished at 270 K but reappeared at 100 K. In the same method, L-alanine has no such phenomenon. An obvious decrease in the scattering intensity of the methyne group C(alpha)-H stretching mode at 2964 cm(-1) in D-alanine occurs at the lambda transition temperature. We present our experiments involving the possible relevance of Z(0) force with Salam's putative phase transition in the origin of homochirality.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/50575]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wang, WQ,Yi, F,Ni, YM,et al. Parity violation of electroweak force in phase transitions of single crystals of D- and L-alanine and valine[J]. JOURNAL OF BIOLOGICAL PHYSICS,2000,26(1):51.
APA	Wang, WQ,Yi, F,Ni, YM,Zhao, ZX,Jin, XL,&Tang, YQ.(2000).Parity violation of electroweak force in phase transitions of single crystals of D- and L-alanine and valine.JOURNAL OF BIOLOGICAL PHYSICS,26(1),51.
MLA	Wang, WQ,et al."Parity violation of electroweak force in phase transitions of single crystals of D- and L-alanine and valine".JOURNAL OF BIOLOGICAL PHYSICS 26.1(2000):51.