http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13735 2026-04-23T06:58:43Z 2026-04-23T06:58:43Z SARAÇ, Kamuran http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13885 2024-02-05T08:34:05Z 2021-01-01T00:00:00Z

Spectroscopic characterization and structural insights of 4- Coumarinyl-4-nitrobenzoate using vibrational and quantum chemical calculations SARAÇ, Kamuran The aim of the study was to synthesize 4-Coumarinyl-4-nitrobenzoate and detect its experimental and theoretical properties. 4-Coumarinyl-4-nitrobenzoate was synthesized using by the nucleophilic adduction-separation reaction of aroyl compounds. In this context 4-coumarinyl 4-nitrobenzoate compound has been characterized both experimentally and theoretically by using quantum chemical calculations and spectral techniques. Quantum chemical calculations such as the molecular geometry, geometric structure, and geometric parameters of the title compound were calculated with the 6-311G (d, p) basis set. Quantum chemical calculations of electronic properties such as energy difference between HOMO-LUMO, chemical hardness and chemical softness were made. Molecular electrostatic potential (MEP) surface of 4-Coumarinyl-4-nitrobenzoate was obtained.

2021-01-01T00:00:00Z UNLUERA, Ali Tugcan KOCATURK, Huseyin DONER, Zeynep Kaya, Mustafa YILDIRIM, Demet Kıran KUMRAL, Mustafa OZDAMAR, Senel http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13884 2024-02-05T08:31:10Z 2021-01-01T00:00:00Z

Geyikli (Çanakkale, Turkey) Heavy Mineral Sands: Insights to Their Origin Related with Alkaline Intrusive Rocks UNLUERA, Ali Tugcan; KOCATURK, Huseyin; DONER, Zeynep; Kaya, Mustafa; YILDIRIM, Demet Kıran; KUMRAL, Mustafa; OZDAMAR, Senel Essexites of Kestanbol pluton have significant amount of iron (Fe), titanium (Ti), Rare Earth Elements (REE) and thorium (Th) and considered as the source of Geyikli Heavy Mineral Sands (HMS). Geyikli HMS were enriched by the minerals of magnetite, rutile, monazite and apatite. In Geyikli HMS, REE contents (up to 0,25%) were rised by 4-5 times during placer deposition, mainly caused by the enriching of weathering resistant REE bearing dense phosphate minerals and zircon. On the other hand, Fe (up to 11%) and Ti (up to 2,5%) enrichments are heavily dependent on the magnetite, titanomagnetite and rutile minerals. By using the basic physical mineral processing techniques such sieving, shaking tables, multi gravity seperators, magnetic seperation, it is possible to reach higher grades for both REE and Fe-Ti and to have better initial values for electrochemical mineral processing techniques.

2021-01-01T00:00:00Z ÇANAKCI GÜLENGÜL, Songül KARABULUT, Fadime http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13881 2024-02-05T08:24:52Z 2021-01-01T00:00:00Z

Physiological and biochemical effects of 2.4-D herbicide in wheat (Triticum aestivum L.) varieties ÇANAKCI GÜLENGÜL, Songül; KARABULUT, Fadime In this work were investigated the physiological and biochemical responses depended on toxic effect caused by different concentrations of herbicides called as 2.4-Dichlorophenoxyacetic acid (2.4-D) herbicide in the seedlings that belong to three wheat varieties. The seeds which belong to wheat (Triticum aestivum L. Bayraktar cv., İkizce cv. and Tosunbey cv.) were used as plant material. 15-day old seedlings for each wheat variety were divided into 4 groups consisting of the same number of seedlings and four variety doses of herbicide (0, 100 µM, 300 µM ve 1000 µM) were applied for them. In these applications for seedlings were preferred hydroponic surrounding to root. Although three varieties were increased the growth of root and shoot elongation from the growth parameters of the seedlings, it leaded to a decrease in growth parameters in general in this herbicide. Although 2.4-D in the leaves were caused an increase in 100 μM dose for only the Bayraktar in amount of chlorophyll a+b. In ones except these, there was always been a decreased. The amount of carotenoid was resulted in the reduction of three varieties. Amount of MDA were increased in all three varieties. Glutathione (GSH) / oxidized glutathione (GSSG) ratios in leaves were increased in three varieties. The superoxide dismutase (SOD) activity in the leaves were increased at the Bayraktar and decreased in the İkizce and the Tosunbey. Catalase (CAT) activity showed to a decrease in three varieties. As a result, it was determined that the 2.4-D, which was toxic for wheat plants even in very low concentrations

2021-01-01T00:00:00Z Aygün, Murat http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13879 2024-02-05T08:21:00Z 2021-01-01T00:00:00Z

Influence of deformed potentials on elastic scattering reactions involving deformed projectile-spherical target Aygün, Murat We investigate the effects of potentials with quadrupole and hexadecapole deformations on the elastic scattering angular distributions of deformed projectiles. We calculate the elastic scattering cross-sections of 20Ne + 12C, 22Ne + 12C, 24Mg + 24Mg and 28Si + 27Al reactions by using Deformed Broglia-Winther (1991) (DBW91), Deformed Aage Winther (DAW95) and Deformed Woods-Saxon (DWS) potentials. Then, we perform the calculations for different orientation angles such as θ = 0 and θ = π/2 of deformed projectiles. Finally, we compare the theoretical results together with the experimental data.

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