Overall cellular composition data were obtained from literature sources and HPLC analysis. The nucleotide composition was taken from Escherichia coli iAF1260 model [1].

High performance thin layer chromatographic finger print parameters had been developed for the siddha medicine 'Maka Vallati Ilekiyam' to fix standards.

The first atropisomeric phosphinine was designed and prepared by introducing substituents into specific positions of the heterocyclic framework; the presence of axial chirality was predicted by means of DFT calculations and experimentally verified by chiral HPLC analysis, derivatization experiments as well as temperature dependent 31P{1H} NMR spectroscopy.

ABSTRACT The retention behaviour of semicarbazides and their cyclic analogues 1,2,4-triazol-3-ones, has been investigated by RP-8, RP-18 and IAM HPLC. The structures of new derivatives were proved by elemental analyses, IR, 1H NMR and 13C NMR spectroscopy. The compounds showed regular retention behaviour in three chromatographic systems; their log k values decreased linearly with the increasing...