Browsing by Author "Kaya C."

Now showing 1 - 6 of 6

Are you happy to be a farmer? Understanding indicators related to agricultural production and influencing factors: Gap-Şanlıurfa, turkey
(2021-11-01) Aydoğdu M.H.; Cançelik M.; Sevinç M.R.; Çullu M.A.; Yenigün K.; Küçük N.; Karlı B.; Ökten Ş.; Beyazgül U.; Doğan H.P.; Sevinç G.; Şahin Z.; Mutlu N.; Kaya C.; Yenikale A.; Yenikale A.
Recently, agricultural production areas and farmer numbers have been decreasing in Turkey, which has started to cause concern. This study aimed to analyze the satisfaction levels of farmers in different irrigation areas in the Southeastern Anatolia Project (GAP)-Şanlıurfa region, based on indicators related to agricultural production and influencing factors. The data were obtained through face-to-face surveys with farmers in 2020 and analyzed by logistic regression in STATA. According to the results, 43.3% of the farmers are happy to be farmers in the current situation, and 35.6% want their children to continue farming activities. It was determined that the area of irrigation, education level, income, and farming experience were statistically significant at different rates in terms of the happiness of the farmers. On the other hand, livestock, number of households, and land size were not statistically significant. While 27.5% of the participants were fully satisfied with the given public support, 15.7% were satisfied with the market selling prices of their products, and 43.5% stated that effective organizations are needed to live well. To ensure agricultural sustainability in the research area, there is a need for more agricultural support, effective extension services, and the development of rural tourism with the participation of the public and private sectors. This study was the first of its kind to be conducted in Turkey.
Experimental and theoretical studies for mild steel corrosion inhibition in 1.0 M HCl by three new quinoxalinone derivatives
(2016-09-01) Tazouti A.; Galai M.; Touir R.; Touhami M.E.; Zarrouk A.; Ramli Y.; Saraçoǧlu M.; Kaya S.; Kandemirli F.; Kaya C.
Three quinoxalinone derivatives, namely (E)-3-styrylquinoxalin-2(1H)-one (SQ), (E)-3-(4-methoxystyryl)quinoxalin-2(1H)-one (MOSQ) and (E)-3-(4-methoxystyryl)-7-methylquinoxalin-2(1H)-one (MOSMQ) were synthesized and characterized. Thus, their inhibition effects on mild steel corrosion in 1.0 M HCl medium were investigated using weight loss method, electrochemical measurements. The effect of temperature on the corrosion behavior of mild steel was studied in the range of 298-328 K. Polarization measurements indicated that, the studied compounds act as a mixed type inhibitors, the inhibition efficiency depends on their concentrations and followed the order MOSQ > MOSMQ > SQ. Electrochemical impedance spectroscopy showed that all compounds act by the formation of a protective film at the metallic surface. The adsorption of three inhibitors on steel surface obeyed Langmuir model, thus the thermodynamic and kinetic parameters were calculated and discussed. In the part based on DFT calculations of this study, some electronic properties of studied molecules were calculated and discussed with the help of B3LYP/6-311G (d,p), B3LYP/6-311 ++G (d,p) and B3LYP/6-311G ++ (2d,2p) methods. The theoretical and experimental results are in good agreement.
Is drought caused by fate? Analysis of farmers’ perception and its influencing factors in the irrigation areas of gap-Şanlıurfa, turkey
(2021-09-02) Aydoğdu M.H.; Cançelik M.; Sevinç M.R.; Çullu M.A.; Yenigün K.; Küçük N.; Karlı B.; Ökten Ş.; Beyazgül U.; Doğan H.P.; Şahin Z.; Mutlu N.; Kaya C.; Yenikale A.; Yenikale A.
This research aims to determine the belief-based drought perceptions and attitudes of farmers in Şanlıurfa, which is in a semi-arid climate regime, and the factors affecting them. The surveys were conducted through face-to-face interviews with farmers selected by a simple random sampling method in 2020. Analyses were performed with ordinal logit regression in STATA. According to the results, while the effects of settlement location, land size, age, and the size of the household were statistically significant to farmers seeing drought, which is the dependent variable, as caused by fate, the effects of income, experience, and education level were insignificant. For the probability of predicting drought for each independent variable in the sequence analysis, the highest probabilities were found among farmers in the Harran Plain, with 21–30 years of experience, from a household of one to four people, with the land area between 5.1 and 10.0 hectares, aged 61 and above, who were primary school graduates, and who had an annual income of less than 25,000 TL ($3561). The subject of drought should be given more place in religious education in the entire research area by prioritizing these groups. It would also be beneficial to organize workshops for the farmers by agricultural consultants, where Islamic scholars would be present to support science and knowledge in terms of faith. This study is the first in this context in Turkey and provides useful data to policymakers for drought-mitigation policies.
New records of Pseudophoxinus firati from Turkey (Teleostei: Leuciscidae)
(2019-06-01) Saç G.; Özuluğ M.; Elp M.; Gaffaroğlu M.; Ünal S.; Ayata M.; Kaya C.; Freyhof J.
Pseudophoxinus firati was described from one spring in the upper Euphrates River drainage in Turkey. Here we record this species from seven additional sites, three in the upper Euphrates drainage, one in the upper Seyhan and three in the upper Ceyhan River drainages. These findings largely expand the distribution area of the species and its habitats are discussed.
Quantum chemical and molecular dynamics simulation studies on inhibition performances of some thiazole and thiadiazole derivatives against corrosion of iron
(2016-07-01) Kaya S.; Kaya C.; Guo L.; Kandemirli F.; Tüzün B.; Uǧurlu I.; Madkour L.H.; Saraçoǧlu M.
In the present study, to predict corrosion inhibition performances of 2-amino-4-(4-chlorophenyl)-thiazole (Inh1), 2-amino-4-(4-bromophenyl)-thiazole (Inh2), 4-(2-aminothiazole-4-yl)-phenol (Inh3), 5,5′-(ethane-1, 2-diyldisulfanediyl) bis-(1,3,4-thiadiazole-2-amine) (Inh4), 5,5′-(propane-1,3-diyldisulfanediyl) bis-(1,3,4-thiadiazole-2-amine) (Inh5) against corrosion of Fe metal, density functional theory (DFT) calculations and molecular dynamics simulations approach were performed on these mentioned molecules. Firstly, quantum chemical parameters such as the highest occupied molecular orbital energy (EHOMO), lowest unoccupied molecular orbital energy (ELUMO), the energy gap between ELUMO and EHOMO (ΔE), chemical hardness, softness, electronegativity, proton affinity, global electrophilicity, global nucleophilicity and total energy (sum of electronic and zero-point energies) were calculated and discussed with the help of HF/SDD, HF/6-311G, HF/6-31 ++G, B3LYP/SDD, B3LYP/6-311G and B3LYP/6-31 ++G methods. Then, we calculated binding energies on Fe(110) surface of aforementioned thiazole and thiadiazole derivatives to investigate the strength of the interactions between metal surface and these molecules. The theoretical data obtained are in good agreement with the experimental inhibition efficiency results earlier reported.
Quantum chemical studies on the corrosion inhibition of Fe78B13Si9 glassy alloy in Na2SO4 solution of some thiosemicarbazone derivatives
(2018-08-01) Saraçoğlu M.; Elusta M.I.A.; Kaya S.; Kaya C.; Kandemirli F.
In this study, the density functional theory (DFT) at the gradient-corrected correlation functional of Lee-Yang-Parr (B3LYP) functional with 6-311++G(2d,2p), correlation-consistent, polarized valence, X-zeta (cc-pVTZ) basis sets, BP86 functional with/6-311++G(2d,2p) basis set and ab initio calculations using the Hartree-Fock (HF)/6-311++G(2d,2p) methods in gas and water phase of neutral and protonated forms of molecules were performed on six thiosemicarbazone derivatives, namely 4-methyl acetophenone thiosemicarbazone (Inh 1), 4-methoxy acetophenone thiosemicarbazone (Inh 2), Benzaldehyde thiosemicarbazone (Inh 3), 4-methoxy benzaldehyde thiosemicarbazone (Inh 4), 4-ethyl benzaldehyde thiosemicarbazone (Inh 5) and 4-bromo benzaldehyde thiosemicarbazone (Inh 6). The quantum chemical parameters/descriptors, namely, dipole moment (D), highest occupied molecular orbital energy (EHOMO), lowest unoccupied molecular orbital energy (ELUMO), HOMO-LUMO energy gap (ΔE), absolute electronegativity (X), absolute hardness (η), softness (σ), proton affinity (PA), electrophilicity (ω) and nucleophilicity (ε) were calculated and correlated with the experimental inhibition efficiencies (%IE). It was observed that the theoretical and experimental results were in good agreement.