the composite coatings are showing excellent resistance towards various bacterial and fungal stains. AbstractThe present article reports eco-friendly multifunctional polyurethane-ZnO hybrid nanocomposite coatings obtained from Thevetia peruviana seed oil (TPSO). Initially, the polyols were prepared by treating TPSO with glycerol and the formation was supported by Fourier transform infrared (FT-IR) and 1 H-NMR studies. In the next stage, siloxane functionalized ZnO nanoparticles were added to the polyol mixture in different weight percentages (0, 1 and 2 %) and then treated with excess 4,4′-diisocyanatodicyclohexylmethane (H 12 MDI) in order to synthesize isocyanate terminated polyurethane nanocomposites. The polyurethane hybrids were then casted as thin films and cured under atmospheric moisture. After complete curing they were characterized by using FT-IR, 1 H-NMR, 13 C-NMR, X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, and dynamic mechanical thermal analysis techniques. The hybrid nanocomposites showed superior thermo-mechanical and anti-corrosive properties compared to pristine polyurethane. Also, due to the presence of nano ZnO in the polyurethane matrix,

An efficient total synthesis of antibiotic (-)-codonopsinine 1 with an overall yield of 44% was achieved from d-alanine as a chiral template. The key steps in our strategy are modified Sharpless asymmetric dihydroxylation reaction and the highly stereoselective intramolecular acid-catalyzed amidocyclization.

In recent years microalgae have been proved as the potential source for biodiesel production due to high oil content. In the present study three brackish water microalgal strains (Chlorococcum sp., Chlorella sp. and Scenedesmus sp.) of Odisha coast were screened for the suitability for biodiesel production. Among all, Scenedesmus sp. seems to be the best one for high lipid productivity (24.66mg/L / day) with high biomass yield of 0.9g/L at stationary phase. Also the Scenedesmus sp. possesses the most adequate fatty acid profile. The present study suggested that Scenedesmus sp. is appropriate for biodiesel production for its high lipid content; this strain was selected for higher scale studies.

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