Magnetic Field Differentiation of Enantiomeric Isomers of Amino Acid in Aqueous Sodium Chloride Solution

Abstract

Recently, we have made differential scanning calorimetry (DSC) measurements on an aqueous sodium chloride solution which was frozen under a magnetic field. Two phases of the eutectic compound of the salt and water were formed in the sample: i.e., the compound itself and the associate of the eutectic compound with oxygen.1 This result suggests that a previous finding that these two phases formed without the application of an external magnetic field2 may have been due to the effect of the earth's magnetic field. We previously found3 that the enantiomeric isomers of amino acids, such as asparagine, aspartic acid, leucine and threonine can be differentiated from each other in salt solutions which are frozen without an applied magnetic field. Therefore, we wished to investigate the effects of a magnetic field on the reactivities of the enantiomeric isomers of amino acids in an aqueous salt solution. Samples investigated were aqueous sodium chloride solutions (0.1 mob/ b NaCI) to which either 2 mmol/ 1 enantiomeric isomer or the racemic compound of aspartic acid was added. All experimental conditions were identical to those in the previous reportsl-3 except that the samples were frozen under a magnetic field.