The reciprocal thermal isomerization in aqueous solution between neurotoxic nonprotein amino acid β-N-oxalyl-L-α,β-diaminopropionic acid (β-ODAP) in seeds of Lathyrussativus (LS; grass pea) and its nontoxic isomer α-N-oxalyl-L-α,β-diaminopropionic acid (α-ODAP) was studied using capillary zone electrophoresis (CZE) in the range from pH=2.5 to pH=13 at T=75°C, and a decrease of the equilibrium concentration ratio of α-ODAP with the increase of pH of the solution was found. In the range of temperatures 55â95°C, The rate constants have been measured and thermodynamic parameters such as activation energy (Ea) and the pre-exponential factor (A) have been calculated.
利用毛细管区带电泳技术(
CZE),在pH值范围2.5至13、温度75°C的条件下,研究了草豌豆(Lathyrus sativus,简称LS)种子中神经毒性非蛋白质
氨基酸β-
N-草酰基-L-α,β-二
氨基丙酸(β-ODAP)与其无毒异构体α-
N-草酰基-L-α,β-二
氨基丙酸(α-ODAP)在
水溶液中的相互热异构化反应。研究发现,随着溶液pH值的增加,α-ODAP的平衡浓度比率下降。在温度55至95°C的范围内,测定了速率常数,并计算了活化能(Ea)和指数前因子(A)等热力学参数。