نتایج جستجو برای: degradation studies

تعداد نتایج: 1558173  

The relationship between democracy and environment has always been controversial. Some scientists found that democracy had a positive impact on reducing environmental disruption. Other scholars claimed that democracy tends to accelerate environmental degradation. Ther are many studies focusing on main determinants of environmental degradation. More recently, democracy is considered to be one of...

An Nd doped ZnO (1-5%) photocatalyst was successfully synthesized via chemical co-precipitation method. The optical property, nature, and morphology of the synthesized nanoparticles were analyzed by UV-Visible, XRD, and FESEM respectively. XRD study reveals that Nd has been effectively incorporated in the ZnO lattice in the lower level dosage; however, the crystalline nature has been distor...

A. Moradidoost M. A. Bagherinia M. Giahi

The photocatalytic process using semiconductors with a nanostructure is one of the technologies usedfor the destructive oxidation of organic compounds such as surfactants. In this paper, thephotocatalytic degradation of Cetyl pyridinium chloride (CPC), was investigated in aqueous phaseusing various semiconductors such as titanium dioxide (Ti02), zinc oxide (ZnO), stannic oxide(Sn02). The degrad...

Journal: :iranian journal of pharmaceutical research 0
yucel kadioglu department of analytical chemistry, faculty of pharmacy, ataturk university, 25240, erzurum, turkey. alptug atila department of analytical chemistry, faculty of pharmacy, ataturk university, 25240, erzurum, turkey. mehmet gultekin department of chemistry, faculty of science, ataturk university, 25240, erzurum, turkey. nurdan alcan alp department of chemistry, faculty of science, ataturk university, 25240, erzurum, turkey.

the forced degradation study of lidocaine hcl was carried out according to the ich guideline q1a (r2). the degradation conditions were assessed to be hydrolysis, oxidation, photolysis and dry heat during 24 h, 48 h and 72 h and then the samples were investigated by gc-fid method and nuclear magnetic resonance (nmr) spectroscopy. according to these results, the degradation products were not obse...

Background: In the present study, the photocatalytic (TiO2/UV) batch process has been used for the methyl orange (MO) degradation. Methods: In the catalyst range from 0.25 to 1.5 g/L, the optimum concentration of TiO2 was found to be 0.5 g/L. The kinetic behavior of MO degradation has been evaluated using the non-linear form of pseudo-first order and pseudo-second order models. Results: The g...

Journal: :Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) 1998

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