Direct bandgap semiconductors, such as In2O3, Cu2O, and SnO2, have enormous applications in photochemistry, photovoltaics, and optoelectronics. Due to the same parity of conduction and valence bands, the dipole transition is silent in these direct bandgap semiconductors. The low band-to-band transition efficiency prevents them from high intensity light emission or absorption. Here, we report th...

Lipase from Aspergillus niger was “doubly immobilized” with SiO2 nanoparticles in sol-gel powders prepared via the base-catalyzed polymerization of tetramethoxysilane (TMOS) and methyltreimethoxysilane (MTMS). The hydrolytic activity of the immobilized lipase was measured using the p-nitrophenyl palmitate hydrolysis method. The results showed that the optimum preparation conditions for the gels...

Polyethylene glycols (PEG 200-7(0) are used as solvents in various pharmaceutical preparations meant for both internal and external use (1,2). PEGs are incompatible with iodine, potassium iodide, sorbitol, tannic acid, metallic salts like bismuth, mercury and silver salts (2). Their systemic absorption in certain conditions may result in renal failure and CNS depression (3). Morbidity has been ...

In present communication a novel series of benzodiazepine derivatives were synthesized from α, β-unsaturated ketones and evaluated for their antimicrobial activities. The α, β-unsaturated ketones were prepared by ClaisenSchimidt Condensation of Indan-1-one with different aldehydes in presence bleaching earth clay and PEG400 as Greener reaction solvent. A novel benzodiazepine derivatives were sy...

Chalcones are the primary building blocks for flavonoids and isoflavonoids production. a three-carbon, -unsaturated carbonyl system. form when an aromatic aldehyde reacts with acetophenones in presence of catalyst. For synthesis these molecules, variety methods approaches have been reported. The Aldol condensation Claisen-Schmidt reactions most commonly referenced synthetic protocols literature...

Carbon Dots (CDs) were synthesized using laser ablation by focusing the beam on carbon (Tea) material in colloid (CH3) for 3 hours. UV-Vis spectroscopic and fluorometric characterization showed absorption of wavelength peaks caused control treatment after coating Poly Ethylene Glycol (PEG400). The excitation emission energies are formulations CDs absorbance fluorescence intensity. coefficient i...