The light-sensitive Belousov-Zhabotinsky (BZ) reaction with a ruthenium-based catalyst is a convenient system to study the effect of external perturbations on dynamical behavior of chemical reactions. The Ru(bpy)3Cl2 complex was first suggested as a luminescent indicator for the BZ reaction by Demas and Diemente.1 Later the reaction was found to be sensitive to visible light by Gaspar et al.,2 ...

Autonomic materials are those that automatically respond to a change in environmental conditions, such as temperature or chemical composition. While such materials hold incredible potential for a wide range of uses, their implementation is limited by the small number of fully-developed material systems. To broaden the number of available systems, we have developed a post-functionalization techn...

Four new methods using titrimetry and spectrophotometry are described for the rapid determination of amoxycillin in bulk drug and dosage forms. In direct titrimetry (Method A), the drug is titrated with bromate–bromide mixture in acid medium using methyl orange indicator. Back titrimetry (Method B) entails adding a known excess amount of bromatebromide mixture to the drug solution in acid mediu...

a kinetic spectrophotometric method for rapid measurement of thiocyanate in serum, urine and sewage water with no need for removed of interfering substances in described. the method is based on the inhibitory effect of thiocyanate on the oxidation of pyrogallol red by bromated and nitrite which is monitored at 467 nm. the variables affecting the rate of the reaction were investigated and the op...

Providing safe tap water while limiting the occurrence of disinfection by-products (DBPs) is probably one most challenging aspects environmental chemical engineering within urban cycle. In present work, an investigation about this challenge for real conditions a full-scale drinking treatment plant has been carried out. Five different and well-known technologies (four aeration procedures, coagul...

the structure of the nonaaquayttrium (iii) bromate, [y(h2o)9](bro3)3, at low temperature (100 k) has been studied by means of single-crystal x-ray diffraction. crystallography shows a hexagonal unit cell, space group p63/mmc (no. 194) with z = 2, a = b = 11.7104(11) å, c = 6.6259(5) å and v = 786.90(12) å3 at 100 k. the hydrated trivalent yttrium(iii) ion forms a tricapped trigonal prism, in wh...