Previously we have shown that the fluorescence of the dihydropyridine calcium antagonist felodipine provides an accurate means of monitoring the formation of an allosterically potentiated conformer of calmodulin (Mills, J. S., and Johnson, J. D., (1985) Biochemistry 24, 4897-4903). Characteristic of this conformer is the abolition of cooperativity among the two felodipine-binding sites on calmo...

The available data on the combined action of rare earth elements and heavy metals are contradictory. Therefore, goal presented work is relevant – to determine effects solutions copper, lanthanum salts their equimolar mixtures under controlled conditions for Daphnia magna Straus. It has been established that death D. over 50% in containing Cu2+ observed at a calculated concentration 0.05 mg/L (0...

The two non-isostructural lanthanum pnictogenide selenides La3NSe3 and La3PSe3 are formed by oxidizing metal with sodium azide (NaN3) in the presence of selenium an excess iodine for eight days at 850 °C reacting binary compounds sesquiselenide (La2Se3) monophosphide (LaP) four 900 torch-sealed glassy silica ampoules. crystallizes well-known Sm3NS3-type structure orthorhombic space group Pnma l...

Lanthanum substituted Ni-Zn ferrite nanoparticles (Ni0.5Zn0.5LaxFe1-xO4; 0.00 ≤x≤ 1.00) synthesized by sol-gel method were presented. X-ray diffraction patterns reveal the typical single phase spinel cubic ferrite structure, with the traces of secondary phase for lanthanum substituted nanocrystals. In addition, the structural analysis also demonstrates that the average crystallite size varied i...

The abilities of various divalent cations to enter the cytoplasm of mouse lacrimal acinar cells was examined under resting and agonist-stimulated conditions, by monitoring their effects on the fluorescence of cytosolic fura. In vitro Ni’+, Co2+, and Mn2* quenched the furafluoresceAce, whereas Sr’+, Ba”, and La3+ produced an excitation spectrum and maximum brightness similar to Ca’+. Stimulation...