in this research oxidation kinetic panceuo.s (p.s) by s2o8-2 at the presence of agno3 ascatalyst was studied.the method was spectrophotometer following absorption spectrum (p.s) inwave length of 518 nm. after improving the condition such as ph, p.s concentration, k2s2o8concentration, ionic strength, temperature, rate constant, activation energy, constant frequency,order reaction and thermo dyna...

The quinoline urea derivatives 1,3-di(quinolin-5-yl)urea (DQ5U), 1-phenyl-3-(quinolin-6-yl)urea (PQ6U), 1-(isoquinolin-5-yl)-3-phenylurea (PiQ5U) and 1-phenyl-3-(3,5-bis(pyrid-2-yl)-1,2,4-triazol-4-yl)urea (PPT4U) have been synthesised and structurally characterized by powder and single crystal X-ray diffraction. Their gelator behaviour in the formation of Ag-complexes has been explored. Compou...

The aim of this study is to determine some phytochemical contents, to synthesize silver nanoparticles AgNPs using Cuminum cyminum (C. cyminum) leaf extract, to study the effects of different conditions on the rate of synthesis, and to evaluate their antibaterial and antifungal activities. AgNPs were synthesized using C. cyminum leaf extract as bioreducer agent and aqueous silver nitrate solutio...

Silver nanoparticles were prepared by using alkali treated maize starch which plays a dual role as reducer for AgNO3 and stabilizer for the produced AgNPs. The redox reaction which takes a place between AgNO3 and alkali treated starch was followed up and controlled in order to obtain spherical shaped silver nanoparticles with mean size 4-6 nm. The redox potentials confirmed the principle role o...

______________________________________________________________________________ In this paper the conductometric titration of propranolol hydrochloride in pharmaceutical formulations using silver nitrate as titrant is proposed. The method was based on the formation of an insoluble salt (AgCl(s)) between the chloride of propranolol hydrochloride molecule and Ag(I) ions of the titrant AgNO3. The e...

A novel, low-cost and direct green synthesis strategy was developed for the preparation of polymer composite spheres composed of silver nanoparticles (AgNPs) decorated on the polymer colloids in a raspberry-like fashion. The polymer colloids were employed as both the reductant and the substrate support. The environmentally benign reaction system consists of AgNO3, polymer spheres and an ethanol...

SZENT-GY6RYGI [1928] has demonstrated that when a section of the adrenal of the ox is immersed in 0 4 % AgNO3 solution, its cortex darkens owing to the deposition of metallic silver. The reduction, he concluded, was due to the presence of ascorbic acid (hexuronic acid). In view of the recent observations on the high and persistent antiscorbutic activity of ascorbic acid it became obvious that t...