Amrinder Singh

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The present study was undertaken to evaluate the free radical scavenging potential of the roots of Crotolaria burhia by using different antioxidant models of screening. The methanolic extract at 1280μg/ml showed significant scavenging of the radical cation; DPPH (1, 1-diphenyl-2-picryl hydrazyl), superoxide anion (O2) and lipid peroxidation potential. The(More)
Betulinic acid (BA), a pentacyclic lupine-type triterpene, is reported to inhibit cell growth in a variety of cancers. However, its efficacy is limited by its poor aqueous solubility and relatively short half-life. In this study, BA-monomethoxy polyethylene glycol (mPEG) conjugate was synthesized by covalent coupling the C-28 carboxylic acid position of BA(More)
We present a novel method that breaks the resolution barrier in nuclear magnetic resonance (NMR) spectroscopy, allowing one to accurately estimate the chemical shift values of highly overlapping or broadened peaks. This problem is routinely encountered in NMR when peaks have large linewidths due to rapidly decaying signals, hindering its application. We(More)
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