Radiolysis,racemization and the origin of molecular asymmetry in the biosphere |
| |
Authors: | William A Bonner Richard M Lemmon |
| |
Institution: | (1) Department of Chemistry, Stanford University, 94305 Stanford, California, USA;(2) Lawrence Berkeley Laboratory, University of California, 94720 Berkeley, California, USA |
| |
Abstract: | Summary An investigation has been undertaken to determine whether ionizing radiation might engender racemization of optically active amino acids, along with their usual radiolysis. As prototypes, crystalline D- and L-leucine, as well as aqueous solutions of their sodium salts were exposed to the radiation from a 3000 Ci60Co-ray source.-ray doses which caused about 68% radiolysis of solid leucine left a residue which was about 5% racemized, while racemization proved even greater at lower doses for the dissolved sodium salts. In aqueous solution both percent degradation and percent racemization of the sodium salts were proportional to-ray dosage within the range employed (1–27 · 106 rads). Implications of these observations for the origin of molecular asymmetry by the-decay parity violation mechanism are discussed. |
| |
Keywords: | Radiolysis Radioracemization Origin of Optical Activity |
本文献已被 PubMed SpringerLink 等数据库收录! |
|