Yazar "Gürkan, Yelda Yalçın" için Araştırma Çıktıları | TR-Dizin | WoS | Scopus | PubMed listeleme
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Analysis of the reaction kinetics of aminotoluene molecule through DFT method
Eren, Bahar; Gürkan, Yelda Yalçın (Bulgarian Acad Science, 2015)In this study, the most probable reaction paths of aminotoluene (o-toluidine) molecule with OH radical were analyzed. The optimized geometry was calculated via Gauss View 5. Subsequently, the lowest energy status was found ... -
Application of Fe-doped TiO2 specimens for the solar photocatalytic degradation of humic acid
Birben, Nazmiye Cemre; Uyguner-Demirel, Ceyda Senem; Sen Kavurmaci, Sibel; Gürkan, Yelda Yalçın; Türkten, Nazlı; Çınar, Zekiye; Bekbolet, Miray (Elsevier Science Bv, 2017)This study aimed to assess solar photocatalytic activity of Fe-doped TiO2 specimens for the degradation of natural organic matter (NOM) represented by a model humic acid (HA). Fe-doped TiO2 specimens (P-25 and UV-100) were ... -
Computational examination of degradation reactions of Buprofezin
Kurumoğlu, S.; Gürkan, Yelda Yalçın (Bulgarska Akademiya na Naukite, 2022)Degradation reactions of molecules to be investigated will be examined by molecular modeling methods and theoretical approaches will be proposed for reaction pathways. For this purpose, possible reactions were calculated ... -
Degradation reactions of Covid-19 active ingredients by molecular modeling method
Pandır, Begüm; Gürkan, Yelda Yalçın (Bulgarska Akademiya na Naukite, 2022)The coronavirus (Covid) is a large family of viruses known to cause a variety of illnesses, from the common cold to acute respiratory infections. The severity of the infection can be seen as pneumonia, acute respiratory ... -
Determination of Ascorbic Acid in Common Fruits, Herbal Tea by Using Cuprac and Cerac Methods
Karasakal, Ayça; Gürkan, Yelda Yalçın (Asian Journal Of Chemistry, 2012)The method used to determine the ascorbic acid (Vitamin C) is based on the oxidation of ascorbic acid to dehlydroascorbic acid with the cupric ion reducing antioxidant capacity (CUPRAC) and ceric-reducing antioxidant ... -
Determination of Total Antioxidant Capacity of Rosehip (R. arvensis Huds) Growing in Turkey and Rosehip Species by Using CUPRAC Spectrophotometric Method
Karasakal, Ayça; Gürkan, Yelda Yalçın (Asian Journal Of Chemistry, 2013)L-Ascorbic acid (vitamin C) is the most important vitamin for human nutrition supplied by fruits and vegetables, and is the main water-soluble antioxidant in human plasma. L-Ascorbic acid is reversibly oxidized to form ... -
Determination of Vitamin E in Canola Seeds by High Performance Liquid Chromatography
Karasakal, Ayça; Gürkan, Yelda Yalçın (Asian Journal Of Chemistry, 2012)Tocopherols (vitamin E) are natural phenolic antioxidants present in vegetable oils and are responsible for many healthful properties of these foods. They are effective radical scavengers and defend the body against free ... -
Effect of molecular properties on the photocatalytic degredation rates of pyridazine
Gülsen, A.; Gürkan, Yelda Yalçın (International Congress of Chemistry and Environment, 2014)In this study, with the intention of determining the primary intermediates, the photocatalytic degradation reaction of pyridazine which has been accepted as the pollutant was modelled. Geometry optimizations of the reactants, ... -
Electrical, optical and theoretical characterization of doped and undoped calamitic liquid crystal: (s)-5-octyloxy-2-[[[4-(2-methyl butoxy) phenyl] imino] methyl] phenol
Serin, Merih; Kuruoğlu, Furkan; Moğulkoç, M.; Çalışkan, Murat; Gürkan, Yelda Yalçın; Yaşa Şahin, O.; Bilgin Eran, B. (Natl Inst Optoelectronics, 2014)The electrical conductivities of undoped and doped calamitic liquid crystalline compound, (S)-5-octyloxy-2-[[[4-(2-methylbutoxy) phenyl] imino] methyl] phenol (OMPIMP) with tetrabutylammonium tetrafluoroborate as dopant ... -
Enhanced solar photocatalytic activity of TiO2 by selenium(IV) ion-doping: Characterization and DFT modeling of the surface
TiO2 was doped with Se(IV) ions to obtain a visible light active photocatalyst with high photocatalytic activity. In order to characterize and describe the effect of Se(IV)-doping on the electronic and structural properties ... -
Forced Degradation Studies of Nateglinide by the First-Order Derivative Spectrophotometric Method and the Density Functional Theory of the Nateglinide Molecule
Karasakal, Ayça; Gürkan, Yelda Yalçın (Springer, 2022)Nateglinide (NAT) is an oral antihyperglycemic agent used for the treatment of noninsulin-dependent diabetes mellitus. We evaluated the NAT stability under various forced degradation tests (acidic, basic) and predicted the ... -
Influence of raw rice husk addition on structure and properties of concrete
Yüzer, Nabi; Çınar, Zekiye; Aköz, Fevziye; Biricik, Hasan; Gürkan, Yelda Yalçın; Kabay, Nihat; Kızılkanat, Ahmet Beşer (2013)When concrete is exposed to high temperatures, vapor pressure increases and the concrete may spall. In order to prevent this, polypropylene fibers are added to concrete. However, it is known that these fibers produce harmful ... -
Influence of Se/N Codoping on the Structural, Optical, Electronic and Photocatalytic Properties of TiO2
Gürkan, Yelda Yalçın; Kasapbasi, Esra; Türkten, Nazlı; Çınar, Zekiye (Mdpi Ag, 2017)Se4+ and N3- ions were used as codopants to enhance the photocatalytic activity of TiO2 under sunlight irradiation. The Se/N codoped photocatalysts were prepared through a simple wet-impregnation method followed by heat ... -
Investigation of possible degradation reactions of amoxicillin molecule
Tekpetek, T.; Gürkan, Yelda Yalçın (Bulgarian Acad Science, 2016)Amoxicillin is used to treat infections caused by bacteria, including infections of the ears, lungs, sinus, skin and urinary tract. Antibiotics those taken by living beings are disposed of from living metabolism as unchanged ... -
Modelling of oxydibenzenesulfonyl hydrazide (OBSH) in gas-phase
Eren, Bahar; Gürkan, Yelda Yalçın (Scientific Publ-India, 2019)Oxydibenzenesulfonyl hydrazide (OBSH), under some circumstances, can act as a foaming factor, and also as a crosslinking agent in the hardening reaction. Another use of OBSH is elastomer production under room pressure, ... -
Molecules of benidipine: experimental and theoretical investigation
Karasakal, Ayça; Doğan, G.; Gürkan, Yelda Yalçın (Bulgarian Acad Science, 2017)In the search for a plausible mechanism for the photocatalytic degradation reaction of BEN, DFT reactivity descriptors were employed to have information about the most susceptible sites for hydroxyl radical attack. ... -
The most stable transition state complexes of the aminotoluene molecule
Eren, Bahar; Gürkan, Yelda Yalçın (Bulgarian Acad Science, 2016)In this study the most probable reaction paths of ATnm, OATnm, MATnm, PATnm, NMATo and NMATm transition states with OH radicals have been analyzed. The optimized geometry was calculated via Gauss View 5. Subsequently, the ... -
Photocatalytic degradation of cefazolin over N-doped TiO 2 under UV and sunlight irradiation: Prediction of the reaction paths via conceptual DFT
Cefazolin is a semi-synthetic antibiotic found in aqueous environments as a pollutant due to its widespread use. The photocatalytic degradation of cefazolin was investigated in aqueous N-doped and undoped-TiO 2 suspensions ... -
Photodegradation kinetics of organophosphorous with hydroxyl radicals: Experimental and theoretical study
Aydogdu, S.; Hatipoğlu, A.; Eren, Bahar; Gürkan, Yelda Yalçın (Serbian Chemical Society, 2021)The presence of organophosphorus compounds (OPs) in the environmental counterparts has become an important problem because of their toxicity. In this study, the photocatalytic degradation reactions of the three OPs with ... -
Possible reaction pathways of selected organophosphorus and carbamate pesticides according to the DFT calculation method
Eren, Bahar; Gürkan, Yelda Yalçın (Bulgarska Akademiya na Naukite, 2022)This research was carried out in order to analyse the reactions of three organophosphorus (OP) and three carbamate (CB) pesticides with the hydroxyl radical (.OH), and their degradation paths. The studied organophosphorus ...