Bindi P. Shastri

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The interaction of lanthanide(III) nitrates (La3+ to Lu3+) with the carboxylic ionophore lasalocid A (LS) has been studied by circular dichroism (CD) and fluorescence spectroscopic techniques in acetonitrile and in methanol. Analysis of the CD data in acetonitrile has revealed the coexistence of both 1:1 (ionophore:cation) and 2:1 complexes in solution. For(More)
Two linear synthetic peptides, N-tBoc-Pro-Gly-Ala-NHCH3 and N-tBoc-Pro-D-Ala-Ala-NHCH3, have previously been shown by us to complex with Ca2+ and form 2:1 (peptide:calcium) complexes. Here we report their binding to Pr3+ and demonstrate, by 1H NMR, the peptide-mediated transport of Pr3+ across dimyristoylphosphatidylcholine unilamellar vesicles via a 2:1(More)
Spatial and temporal monitoring of agricultural crop is one of the important aspects for the agricultural production estimation for India. Among the various remote sensing tools, role of polarimetric SAR is being evaluated for the assessment of its utility in providing improved information. In view of importance of polarimetric techniques, it is necessary(More)
The interactions of carrier ionophores, nonactin, A23187, and lasalocid A with liposomes formed from the synthetic lipids dimyristoylphosphatidylcholine and dipalmitoylphosphatidylcholine are investigated by differential scanning calorimetry and 1H and 31P nuclear magnetic resonance techniques. The results indicate that the mode of interaction of these(More)
Several molecules like ionophores, vitamins, ion-binding cyclic peptides, acidic phospholipids, surfactants are known to expose the inner side of vesicles, to the externally added cations. Whereas ionophores and certain other systems bring about these changes by a selective transport (influx) of the cation by specialized mechanisms known as the carrier and(More)
The transport kinetics of three lanthanide ions (viz., Pr3+, Nd3+, and Eu3+) across dimyristoylphosphatidylcholine and dipalmitoylphosphatidylcholine unilamellar vesicles mediated by the two carboxylic ionophores lasalocid A and A23187 have been studied by proton nuclear magnetic resonance spectroscopy. Time-dependent changes in the chemical shifts of head(More)
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