The extraction of L-Arginine with di(2-ethylhexyl)phosphoric acid(D2EHPA) has been studied as functions of equilibrium pH, D2EHPA concentration, L-Arginine equilibrium concentration, NH 4Cl concentration and temperatu...The extraction of L-Arginine with di(2-ethylhexyl)phosphoric acid(D2EHPA) has been studied as functions of equilibrium pH, D2EHPA concentration, L-Arginine equilibrium concentration, NH 4Cl concentration and temperature. The beffer extraction results were obtained in condition of pH=5～7, D2EHPA 0.2～0.4 mol/L, NH 4Cl<0.2 mol/L and low temperature. The equilibrium concentration of L-Arg depends on the saturation extraction capacity.展开更多
Laminine(4) is a kind of non-protein amino acids in the kelp,which can prevent and cure hypertension.Because of its trace amount in the nature,it was always prepared by using bio-mimetic synthesis methods.And none or ...Laminine(4) is a kind of non-protein amino acids in the kelp,which can prevent and cure hypertension.Because of its trace amount in the nature,it was always prepared by using bio-mimetic synthesis methods.And none or few of the synthetic methods of compound 4 were reported so far.In this article,with lysine(1) as the starting material,compound 4 was prepared with bio-mimetic synthesis method,with a yield of 37.6% and a purity of 97.2%.The structure of compound 4 was determined via HPLC,IR,MS,1H NMR,13C NMR and element analysis,and some of its physical and chemical properties were also studied.The results show that compound 4 is white crystalloid and has no smell,the quasi-molecular ion peak of compound 4 is m/z 207.1,and chemical shift δ 3.63(s,9H),the features at 2945, 2863 and 1480 cm-1 in IR spectrum all show that ε-amino group of compound 4 is fully alkylated.This method could get pure laminine with simple operations,and it could be considered as a green technology with great industrial profits and notable ecological values.展开更多
文摘The extraction of L-Arginine with di(2-ethylhexyl)phosphoric acid(D2EHPA) has been studied as functions of equilibrium pH, D2EHPA concentration, L-Arginine equilibrium concentration, NH 4Cl concentration and temperature. The beffer extraction results were obtained in condition of pH=5～7, D2EHPA 0.2～0.4 mol/L, NH 4Cl<0.2 mol/L and low temperature. The equilibrium concentration of L-Arg depends on the saturation extraction capacity.
文摘Laminine(4) is a kind of non-protein amino acids in the kelp,which can prevent and cure hypertension.Because of its trace amount in the nature,it was always prepared by using bio-mimetic synthesis methods.And none or few of the synthetic methods of compound 4 were reported so far.In this article,with lysine(1) as the starting material,compound 4 was prepared with bio-mimetic synthesis method,with a yield of 37.6% and a purity of 97.2%.The structure of compound 4 was determined via HPLC,IR,MS,1H NMR,13C NMR and element analysis,and some of its physical and chemical properties were also studied.The results show that compound 4 is white crystalloid and has no smell,the quasi-molecular ion peak of compound 4 is m/z 207.1,and chemical shift δ 3.63(s,9H),the features at 2945, 2863 and 1480 cm-1 in IR spectrum all show that ε-amino group of compound 4 is fully alkylated.This method could get pure laminine with simple operations,and it could be considered as a green technology with great industrial profits and notable ecological values.
基金supported by the National Natural Science Foundation of China (21002006,20452002)Special Program for Key Basic Research of the Ministry of Science and Technology,China (2004-973-36)~~
基金supported by the National Natural Science Foundation of China(21002006,20452002)Special Program for Key Basic Research of the Ministry of Science and Technology,China(2004-973-36)~~
