NANOCHEMISTRY – THE BIG PROMISE OF THE “SMALLS”

A CHEMICAL AND PHOTOCHEMICAL STUDY OF RADICALIC SPECIES FORMED IN METHYLENE BLUE ACIDIC AND BASIC AQUEOUS SOLUTIONS

Electron spin resonance spectra have been used to gain information on the mechanism of photolysis of aqueous solution of methylene blue. The identity and behaviour of the semiquinone radicals formed as intermediate reduc...

RETENTION MECHANISMS APPLIED IN SOLID PHASE EXTRACTION FOR SOME POLAR COMPOUNDS

Two basic mechanisms were applied for studying some polar compounds of pharmaceutical interest (captopril, atenolol, and metformin) by solid phase extraction, using an octadecilsilica based adsorbent. The retention of th...

OVERALL ACTIVATION ENERGY OF PROPANE-AIR COMBUSTION IN LAMINAR FLAMES

The overall activation energy of propane oxidation in laminar flames was evaluated from normal burning velocities characteristic for the flame propagation in preheated or diluted propane-air mixtures, using various corre...

A NEW N,N-DIMETHYLBIGUANIDIUM DERIVATIVE – SYNTHESIS AND STRUCTURAL CHARACTERISATION

A new N,N-dimethylbiguanidium derivative (C4H12N5)2(NO3)(ClO4) has been synthesised and characterised by single crystal X-ray diffraction. The derivative crystallizes in the monoclinic C2/c space group and the N,N-dimeth...