in order to prepare polyurethane elastomers with acceptable physical properties and good biocompatibility, novel polyurethane networks were synthesized via curing reaction of epoxy-terminated polyurethane prepolymers (eups) with hexamethylene diamine. eups were prepared from reaction of glycidol with nco-terminated polyurethanes (itps). itps were also synthesized from reaction of one equivalent...

In the present work, it has been shown that bismuth film electrodes deposited on screen-printed carbon supports could be successfully used to provide well-shaped, sensitive and reproducible catalytic adsorptive stripping signals of Ge(IV) in presence catechol V(IV)-HEDTA (HEDTA-N-hydroxyethyl-ethylene diamine-triacetic acid) complex.

The insect antifeedant and toxic activity of hydroxyperezone (1), its derivatives 2-9, along with 3-hydroxy- (10) and 6-hydroxythymoquinone (11) were studied against Spodoptera littoralis, Leptinotarsa decemlineata, and Myzus persicae. The antifeedant tests showed that L. decemlineata was the most sensitive insect, followed by M. persicae, while S. littoralis was not deterred by compounds 1-11....

      In order to prepare polyurethane elastomers with acceptable physical properties and good biocompatibility, novel polyurethane networks were synthesized via curing reaction of epoxy-terminated polyurethane prepolymers (EUPs) with hexamethylene diamine. EUPs were prepared from reaction of glycidol with NCO-terminated polyurethanes (ITPs). ITPs were also synthesized from reaction of one equi...

Al(OH)3 nanoparticles were synthesized by a simple precipitation reaction. The effect of various amines like ethylene diamine, propylene diamine, triethylenetetramine and tetraethylenepentamine as precipitating agents on the morphology of Al(OH)3 nanostructures was investigated. The influence of Al(OH)3 nanoparticles on the flame retardancy of the poly vinyl alcohol (PVA) matrix was studied usi...

Within ten days of incubation, freshly ripe tomato fruits (Ibadan local variety) obtained from a local market in Ile-Ife, Osun State, Nigeria had completely deteriorated and proteins which possessed cellulolytic activity were released. The enzyme was partially purified by a combination of ammonium sulphate precipitation, molecular exclusion chromatography and ion-exchange chromatography. The en...

Biochemicals 5-hydroxytrptophan, 5-hydroxy indole acetic acid, ketanserin, bicuculline, baclofen, atropine, sodium octyl sulfonic acid, ethylene diamine tetra acetic acidEDTA, D-glucose, calcium chloride, bovine serum albumin fraction V, Superoxide dismutase from bovine erythrocytes were purchased from Sigma Chemical Co., St. Louis, USA. All other reagents were of analytical grade purchased loc...

CAT: Catalase; SOD: Superoxide Dismutase; GPx: Glutathione Peroxidase; GST: Glutathione-S-Transferase; GSH: Glutathione; LPO: Lipid Peroxidation; MDA: Malondialdehyde; H2O2: Hydrogen Peroxide; D.H2O: Distilled Water; Conc.: Concentrated; ROS: Reactive Oxygen Sspecies; RBC: Red Blood Cells ; NADH: Nicotinamide Adenine Dinucleotide;CDNB: 1-Chloro-2,4-Dinitro Benzene; TCA: Trichloro Acetic Acid; E...