Studies on synthesis of novel a-pyrone derivatives

Akdağ, Akın


Studies on photochemical vapor generation of selenium
Çetmeli , Melis; Ertaş, Gülay; Department of Chemistry (2019)
Selenium is a significant trace element for human health. Selenium can be essential or toxic for human body depending on its concentration. Within the scope of this thesis, photochemical vapor generation tungsten coil atomization technique has been studied for the determination of selenium. Volatile selenium compounds were generated by exposure of UV light of the solution containing selenium and acetic acid. To increase sensitivity of photochemical vapor generation system, the technique was combined with tu...
Studies on interaction of electromagnetic waves with barium hexaferrite ceramics
Gürkan, Nurdan; Timuçin, Muharrem; Department of Metallurgical and Materials Engineering (2008)
M-type barium hexaferrite powders doped with titanium and/or cobalt have been synthesized according to the stochiometric formulations BaFe(12 (4/3)x)TixO19, BaFe12-xCoxO19 , BaFe12-2xTixCoxO19 (x varying from 0 to 1.5 with an increment of 0.5) by the mixed oxide approach. The powders were used to manufacture small ceramic tiles by sintering each composition at 1250 °C with soaking times ranging from 1 to 16 hours. XRD work revealed formation of the magnetoplumbite crystal structure in all ceramics. The var...
Studies on the mechanism of base-catalyzed decomposition of bicyclic endoperoxides
Mete, E; Altundas, R; Secen, H; Balcı, Metin (2003-01-01)
Kinetic studies were performed to clarify the Kornblum-Delamare reaction mechanism of bicyclic endoperoxides. Ascaridol and 1,4-diphenyl-2,3-dioxa-bicyclo[2.2.2]oct-5-ene, not having alpha-protons, did not provide any reaction with bases. Reaction with different bases has revealed that reaction rates for the base-catalyzed decomposition of 2,3-dioxa-bicyclo[2.2.2]oct-5-ene depend strongly on the base strength. The stronger the base used, the faster the conversion rate. Reaction rate values k of endoperoxide...
Studies towards synthesis of urea containing helical polymers
Çalışgan, Gizem; Akdağ, Akın; Doğan, Özdemir; Department of Chemistry (2016)
This thesis deals with design and synthesis of chiral polyurea type polymers. These polymers were analyzed with molecular mechanics that they could take a helical form. The polymers are polyurea type polymers and ureas are synthesized by treating isocyanates with amines. Starting from tartaric acid, ((4S,5S)-2,2-dimethyl-1,3- dioxolane-4,5diyl)dimethaneamine was synthesized. The other diamine was naturally occuring L-lysine. These diamine functionalized compounds were treated with pphenylene diisocyanate sy...
Studies on crystal growth of aluminum hydroxide in Bayer process.
Tosun, Ismail; Department of Chemical Engineering (1974)
Citation Formats
A. Akdağ, “Studies on synthesis of novel a-pyrone derivatives,” Middle East Technical University, 1999.