The effects of lanthanide ions and their complexes of citrate and DTPA ligandson the fluldity of dipathetoylphosphatidylethanolamine (DPPE) bilayers have been studiedby FT-Raman spectroscopy. The results show that lan...The effects of lanthanide ions and their complexes of citrate and DTPA ligandson the fluldity of dipathetoylphosphatidylethanolamine (DPPE) bilayers have been studiedby FT-Raman spectroscopy. The results show that lanthanide ions oflower concentrationndecrease the nuldity of acyl chains of DPPE bilayers and change the conformation of c C-C backbone from gauche to the trans lanthanide ions of higher concentration, however,increase the fluldity of acyl chains and increase the gauche population of C-C-C backbone.Lanthainde complex of citrate have no effect on the fluidity of acyl chains of DPPE bilayersin the region of experdriental concentration, but La-DTPA complex increase slightly thefluidity of acyl chains. The results also indicated that lanthainde ion of lower concentrationchanged the lattice packing of hydrocarbon chains from hexagonal form to orthorhombicform, but it is still in hexagonal or distorted hexagonal lattice cell in the gel state in thepresence of metaJ ions and lanthanide complexes of higher展开更多
The effects of urinary macromolecul e chondroitin sulfate A(C 4 S)and L-glutamic acid(L-Glu)on the crys-tallization of calcium oxalate were studied using Langmuir-Blodgett(LB)film of dipalmitoylphosphatidylch oline(DP...The effects of urinary macromolecul e chondroitin sulfate A(C 4 S)and L-glutamic acid(L-Glu)on the crys-tallization of calcium oxalate were studied using Langmuir-Blodgett(LB)film of dipalmitoylphosphatidylch oline(DPPC)as templet.All the calcium oxalate c rystals induced by the LB film of DPPC were calcium oxalate monohydrate(COM).However,the morphology of COM was i nfluenced by the additives of C 4 S and L-Glu.C 4 S induced thin and long hexagonal COM c rystals;L-Glu made one or two (010)crystal face of COM crystals dis-appeared.The crystallization time had no effect on the morphology of COM crystals,but the concentration of C 4 S and L-Glu changed it.As increasing the co ncentration of C 4 S,the amount of COM crystals with a hexagonal prism decreased and that with a thin hexago nal slice increased.When the concen tration of C 4 S was 0.50mg ·mL -1 ,all the calcium oxalate crystals were th in hexagonal slice COM crystals.How ever,as the concentration of L-Glu in-creased from 0.01to 0.50mmol·L -1 ,the hexagonal prism-like COM crystals gradually transformed to COM crystals with one or two (010)crystal face disappearance.展开更多
文摘The effects of lanthanide ions and their complexes of citrate and DTPA ligandson the fluldity of dipathetoylphosphatidylethanolamine (DPPE) bilayers have been studiedby FT-Raman spectroscopy. The results show that lanthanide ions oflower concentrationndecrease the nuldity of acyl chains of DPPE bilayers and change the conformation of c C-C backbone from gauche to the trans lanthanide ions of higher concentration, however,increase the fluldity of acyl chains and increase the gauche population of C-C-C backbone.Lanthainde complex of citrate have no effect on the fluidity of acyl chains of DPPE bilayersin the region of experdriental concentration, but La-DTPA complex increase slightly thefluidity of acyl chains. The results also indicated that lanthainde ion of lower concentrationchanged the lattice packing of hydrocarbon chains from hexagonal form to orthorhombicform, but it is still in hexagonal or distorted hexagonal lattice cell in the gel state in thepresence of metaJ ions and lanthanide complexes of higher
文摘The effects of urinary macromolecul e chondroitin sulfate A(C 4 S)and L-glutamic acid(L-Glu)on the crys-tallization of calcium oxalate were studied using Langmuir-Blodgett(LB)film of dipalmitoylphosphatidylch oline(DPPC)as templet.All the calcium oxalate c rystals induced by the LB film of DPPC were calcium oxalate monohydrate(COM).However,the morphology of COM was i nfluenced by the additives of C 4 S and L-Glu.C 4 S induced thin and long hexagonal COM c rystals;L-Glu made one or two (010)crystal face of COM crystals dis-appeared.The crystallization time had no effect on the morphology of COM crystals,but the concentration of C 4 S and L-Glu changed it.As increasing the co ncentration of C 4 S,the amount of COM crystals with a hexagonal prism decreased and that with a thin hexago nal slice increased.When the concen tration of C 4 S was 0.50mg ·mL -1 ,all the calcium oxalate crystals were th in hexagonal slice COM crystals.How ever,as the concentration of L-Glu in-creased from 0.01to 0.50mmol·L -1 ,the hexagonal prism-like COM crystals gradually transformed to COM crystals with one or two (010)crystal face disappearance.
