Determination of Dyeing property of some medicinally important plant species of Uttarakhand Himalayas

528-531In ancient India people used natural dyes to stain woollen products. These dyes were obtained from roots, leaves and bark. Although the plant species give certain dye due to the presence of colourant in it but the colour could be varied by adding various mordants. In the present study, <span style="mso-bidi-font-weight: bold" lang="EN-GB">Myrica esculenta <span style="mso-bidi-font-weight: bold" lang="EN-GB">Buch.-Ham., Pinus roxburghii Sarg. and Terminalia chebula Retz. have selected as natural dyes on the basis of their traditional uses. The pH and ODs of dyeing solutions was measured before and after dyeing. Colour fastness was also determined. It has been found that the ODs decreased after dyeing. </span

Synthesis and Characterization of a Novel 2-Pyrazoline

Reaction of dibenzalacetone with hydrazine hydrate and formic acid yielded a novel 2-pyrazoline 1, characterized by ESI-MS, FT-IR, UV, 1HNMR and 13CNMR data and microanalysis

5-(3-Nitrophenyl)-3-phenyl-4,5-dihydro-1H-pyrazole-1-carbaldehyde

A novel 1-formyl-2-pyrazoline was synthesized by reaction of an α,β- unsaturated ketone with hydrazine hydrate and formic acid. The structure of the title compound was established by UV, IR, 1H NMR, 13C NMR and microanalysis

High-performance liquid chromatography analysis of plant saponins: An update 2005-2010

Saponins are widely distributed in plant kingdom. In view of their wide range of biological activities and occurrence as complex mixtures, saponins have been purified and separated by high-performance liquid chromatography using reverse-phase columns at lower wavelength. Mostly, saponins are not detected by ultraviolet detector due to lack of chromophores. Electrospray ionization mass spectrometry, diode array detector , evaporative light scattering detection, and charged aerosols have been used for overcoming the detection problem of saponins