Kinetics of Glucose Mutarotation Assessed by an Equal-Amplitude Paired Polarized Heterodyne Polarimeter

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题名:	Kinetics of Glucose Mutarotation Assessed by an Equal-Amplitude Paired Polarized Heterodyne Polarimeter
作者:	Lin,CE;Yu,CJ;Chen,CL;Chou,LD;Chou,C
贡献者:	光電科學與工程學系
日期:	2010
上传时间:	2012-03-27 18:14:45 (UTC+8)
出版者:	國立中央大學
摘要:	A dual-frequency equal-amplitude Paired polarization heterodyne polarimeter (DEPHP) was set up in order to precisely measure the mutarotation rate constants of D-glucose in tridistilled water. The DEPHP is based on a balanced detector detection scheme for measurement of the optical rotation angle of D-glucose/water solution during the conversion process between alpha-D-glucose and beta-D-glucose while in a nonequilibrium state. The DEPHP can perform shot-noise-limited detection, so that the total optical rotation angle together with the mutarotation rate constants of alpha-D-glucose and beta-D-glucose conversion can be measured with high sensitivity. In this experiment. the sensitivity of the optical rotation angle measurement was 8.3 x 10(-5) deg/cm, while the total (k), forward (k(1)) and reverse (k(2)) mutarotation rate constants of D-glucose were found to be k = 7.67 x 10(-5) s(-1), k(1) = 2.76 x 10(-5) s(-1), and k(2) = 4.91 x 10(-5) s(-1), respectively, in tridistilled water. Moreover, using the DEPHP, we can measure the specific rotation angles of alpha-D-glucose and beta-D-glucose in water at 632.8 nm. They were 105 degrees and 12 degrees, respectively. Finally, the detection sensitivity of the DEPHP system is also discussed.
關聯:	JOURNAL OF PHYSICAL CHEMISTRY A
显示于类别:	[光電科學與工程學系] 期刊論文

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