Recently doubts have arisen on the usefulness of semicarbazide as marker residue for the illegal use of the antibiotic nitrofurazone (NFZ) in aquaculture and poultry production. Most notably azodicarbonamide (ADC) has been implicated as an alternative source of semicarbazide. ADC is used in some...

Azodicarbonamide is widely applied in the food industry as a new flour gluten fortifier in China, Canada, the United States, and some other countries, whose metabolites of biurea and semicarbazide hydrochloride are reaction products during baking. In this study, IR, Raman and surface-enhanced Ra...

306 conformers of Biurea as a biologically important molecule were optimized and frequency calculation was performed for each conformer. Then, these conformers were classified in seven tautomeric categories. Five most stable tautomers were selected and their stabilities were investigated careful...

Ni-Biurea complex supported on functionalized MCM-41 was prepared by a post-grafting method and used as an efficient, recoverable and thermally stable nanocatalyst for the one-pot synthesis of 2,3-dihydroquinazolin-4(1H)-ones from 2-aminobenzamide and aromatic aldehydes in PEG. This nanocatalyst...

The stoichiometry and thermodynamic stability of copper(II), vanadium(IV/V), iron(II)/(III) and gallium(III) complexes of salicylaldehyde semicarbazone (SSC, HL) and its 5-bromo derivative (Br-SSC, HL) have been determined by pH-potentiometry, UV–Vis spectrophotometry, EPR, 1H and 51V NMR spect...

Two new zinc(II) complexes, [Zn(H2dapsc) (CH3OH)2][ZnBr2Cl2] (1) and [Zn(H2dapsc) (CH3OH)Br]Br.(CH3OH) (2), where H2dapsc is 2,6-diacetylpyridine bis(semicarbazone), were synthesized using a template method in which the pentadentate N3O2 semicarbazone ligand derived from [1 + 2] condensation of ...

Two ruthenium(II) complexes Ru1 and Ru2 bearing as a one ligand 2,2′-bipyridine substituted by a semicarbazone 2-formylopyridine moiety (bpySC: 5-(4-{4′-methyl-[2,2′-bipyridine]-4-yl}but-1-yn-1-yl)pyridine-2-carbaldehyde semicarbazone) and as the others 2,2′-bipyridine (bpy) and 4,7-diphenyl...

ObjectiveTo study anti-inflammatory and analgesic activities in swiss albino mice, two schiff bases namely acetophenone semicarbazone (ASC) and benzophenone semicarbazone (BSC) were synthesized and characterized.

The reaction of 1-isocyanatonaphthalene with hydrazine hydrate in presence of acetone resulted in the formation of napthyl based semicarbazone (1). The compound has been characterized using UV–Visible, FT-IR, NMR, mass spectroscopic and single crystal X-ray diffraction (XRD) tools. The interact...

ObjectiveTo determine the hepatoprotective effect of acetone semicarbazone (ASC) in vivo in normal and Ehrlich ascites carcinoma (EAC) bearing male Swiss albino mice.

A new binuclear mixed ligand complex, [Cu2(Phth)(Me4en)2(H2O)2(NO3)2]·H2O (where, Phth = phthalate, and (Me4en) = N,N,N′,N′tetramethylethylenediamine) was synthesized and characterized using analytical, spectral, magnetic, molar conductance, thermal gravimetric analysis (TGA), X-ray diffracti...

The energies and geometric parameters for nine conformers of N,N,N′,N′-tetramethylethylenediamine [TMEDA=(CH3)2NCH2CH2N(CH3)2] have been determined by ab initio calculations at the HF/6-31G* and MP2/6-31G* levels. Among the nine conformers, G′GG′ and GGG′, having the gauche NCH2–CH2N arran...

The syntheses, FT-IR and UV–Vis spectra, thermal analyses and crystal structures of Mn(II) and Cu(II) orotate coordination polymers with 2-methylimidazole (2-meim) and N,N,N′,N′-tetramethylethylenediamine (tmen) ligands are described. The orotate ligand acts as a bridging ligand with two diff...

The title compound, [Cu(tmeda)(NCS)2]n (1) (tmeda = N,N,N′,N′-tetramethylethylenediamine) was prepared by the reaction of CuCl2·2H2O with potassium thiocyanate and N,N,N′,N′-tetramethylethylenediamine, and its structure was determined by X-ray crystallography. The crystal structure shows th...

Mixed-ligand zinc complexes with N,N,N′,N′-tetramethylethylenediamine (tmen) and R-salicylaldehyde N(4)-allyl thiosemicarbazones (R: 3-OCH3 (L1), 5-Br(L2)), [ZnL1,2(tmen)], were synthesized and the complexes were characterized by elemental analysis, atomic absorption spectrometer, magnetic sus...

The vapor pressures of (N,N,N′,N′ tetramethylethylenediamine (TMEDA) + water), (tetramethylpropylenediamine (TMPDA) + water) binary mixtures, and of pure N,N,N′,N′ tetramethylethylenediamine and tetramethylpropylenediamine components were measured by means of a static device at temperatures ...

The electrochemical fluorination of N,N,N′,N′-tetramethylethylenediamine was carried out in a modified Simons type cell using anhydrous hydrogen fluoride as a solvent. Effects of various experimental parameters like concentration of amine, temperature, and current density etc. were investigate...

In this work, we report new experimental data on the molar heat capacities of two chemically stable diamines, which are potential absorbents for CO2 capture. They are N,N,N′,N′-tetramethylethylenediamine (TMEDA) and N,N,N′,N′-tetramethyl-1,3-propanediamine (TMPDA). The molar heat capacities ...

Hypergolic ignition by the head-on collision of a smaller N,N,N′,N′−tetramethylethylenediamine (TMEDA) droplet and a larger white fuming nitric acid (WFNA) droplet was experimentally investigated by using a droplet collision experimental apparatus equipped with a time-resolved shadowgraph, a p...

The purpose of this study was to evaluate the synergistic bactericidal efficacy of combining ultrasound (US) and fumaric acid (FA) treatment against Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in apple juice and to identify the synergistic bactericidal mechanisms...