544 results on '"Fatih Şen"'
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2. ‘Farfia’ Kayısı Meyvelerinin Depolanabilirliğine Modifiye Atmosfer Paketleme ve 1-Metilsiklopropen Uygulamalarının Etkilerinin Belirlenmesi
- Author
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Nursel Meral, Fatih Şen, and Enes Yılmaz
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prunus armeniaca ,map ,1-mcp ,depolama ,kalite ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
Bu çalışmada, modifiye atmosfer paketleme (MAP) ve 1-metilsiklopropen (1-MCP) ‘Farfia’ kayısı çeşidi meyvelerinin hasat sonrası dayanımlarına etkilerinin belirlenmesi amaçlanmıştır. Çalışma; a) Kontrol, b) MAP, c) 1-MCP, d) MAP + 1-MCP, e) RipeLock™ MAP ambalaj + 1-MCP olacak şekilde beş farklı uygulama gerçekleştirilmiştir. 1-MCP, 24 saat 625 ppb olarak uygulanmıştır. ‘Farfia’ kayısı çeşidine ait meyveler 8 hafta süreyle 0°C’de %90 nemde depolanmıştır. Depolama öncesi ve süresince 2 haftalık periyotlarla alınan örneklerde ambalajların ağzı açılarak 2 gün raf ömründe (20°C) bekletildikten sonra ağırlık kaybı, renk, meyve eti sertliği, suda çözünür kuru madde miktarı, asitlik, pH, toplam fenol miktarı, antioksidan aktivitesi, solunum hızı, etilen salınımı, duyusal değerlendirme ve çürüklük gelişimi belirlenmiştir. MAP’ın yer aldığı uygulamalar, kayısı meyvelerinin ağırlık kaybını depolama ve raf ömrü süresince önemli derecede azalttığı görülmüştür. Meyve eti sertliğinin korunmasında, MAP ile 1-MCP’nin birlikte uygulamaları etkili olmuştur. MAP’ın yer aldığı uygulamalarda meyvelerin solunum hızları daha düşük bulunmuştur. MAP ve 1-MCP’nin teksel ve birlikte uygulanmaları kayısı meyvelerinin etilen salınımını yavaşlatmıştır. Çalışma sonucunda MAP ile 1-MCP’nin birlikte yapıldığı uygulamalardaki ‘Farfia’ kayısı meyvelerinin 42 gün başarıyla saklanabileceği saptanmıştır.
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- 2024
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3. Production of Sustainable Low-Layer Graphene by Green Synthesis at Room Conditions for Platinum-Based Direct Methanol Fuel Cell
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Vildan Erduran, Ramazan Bayat, Iskender Isik, Tugba Bayazit, and Fatih Şen
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Chemical engineering ,TP155-156 - Published
- 2023
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4. The Effects of Different Rates of Polyethylene Bags Openings on Storage of ‘Sultana Seedless’ Grape Variety
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Ayşe Bayramoğlu and Fatih Şen
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vitis vinifera l. ,pe torba ,muhafaza ,kalite ,so2 zararı ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
This study was carried out to determine the effects of different openings onto the polyethylene (PE) packages used in storage of ‘Sultani Çekirdeksiz’ grape variety on quality, SO2 damage, pathological and physiological disorders of grapes. Grapes were harvested at full maturity and placed in PE bags with ‰0 (control), ‰0.5, ‰1 and ‰2 openings. After pre-cooling grapes in the case of SO2 pets were placed after the mouth of the bags were closed. Grapes were stored at 0°C and 90-95% relative humidity for 4 months, and quality changes were determined in monthly samples. SO2 concentrations detected at the end of storage in PE packages with ‰0, ‰0.5, ‰1 and ‰2 openings were 11.16, 5.80, 2.05 and 0,00 mg/kg respectively. It has been found that grapes in packages without opening had significant SO2 content and SO2 damage, especially the end of storage. However, grapes in packages with ‰2 openings had high weight loss and browning scores in stems. The results showed that ‘Sultani Çekirdeksiz’ grapes could be stored more successfully in PE packages with ‰0.5 openings. ‘Sultani Seedless’ grape variety, it may be suggested to use PE bags without openings for 2 and 3 months storage.
- Published
- 2022
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5. Role of Postharvest Oxalic Acid Treatment on Quality Properties, Phenolic Compounds, and Organic Acid Contents of Nectarine Fruits during Cold Storage
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Deniz Eroğul, Hakan Kibar, Fatih Şen, and Muttalip Gundogdu
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nectarine ,postharvest ,oxalic acid ,quality properties ,phenolic compounds ,organic acid ,Plant culture ,SB1-1110 - Abstract
Due to the soft texture of the nectarine fruit, there are difficulties in long-term storage of this fruit. Therefore, it is of great importance to extend the postharvest storage period of this fruit species. In this study, the effect of postharvest OA (Oxalic acid) applications (0, 0.5, 1 and 1.5 mM) on the quality and biochemical contents of nectarine fruits was investigated. On the 40th day of storage, 1.5 mM OA doses reduced weight loss (1.96%) and fruit flesh firmness (36 N) by approximately 44% and 20%, respectively, compared to the control group. The most effective dose in reducing the respiratory rate was again 1.5 mM OA. The 1 mM OA dose was determined to prevent the decay rate approximately by 16% compared to the control group. Organic acid contents showed a continuous decreasing trend during storage and malic acid was determined to be the dominant acid in nectarine fruits. At the end of storage, it was determined that a 1.5 mM OA dose prevented the decrease in malic acid content approximately 35% more than the control group. Chlorogenic acid and rutin were detected at a higher rate than other phenolics. It was observed that 1.5 mM OA dose prevented the breakdown of chlorogenic acid and rutin compounds more so than other doses during storage. In this study, it was determined that a 1.5 mM OA dose especially protected the quality properties and biochemical contents of nectarine fruits in the cold storage more than the control group.
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- 2023
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6. ANOM Approach for Statistical Evaluation of Some Antioxidant Enzyme Activities
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Canan Demir, Sıddık Keskin, and Fatih Şen
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ANOM ,free radicals ,MDA ,NLPCA ,oxidative stress ,Chemistry ,QD1-999 - Abstract
Free radicals are chemical molecules that are more reactive and have an unpaired electron. Free radicals formed inside the cell oxidize biomolecules, leading to cell death and tissue damage. Antioxidants are molecules that can stabilize or inactivate free radicals before they damage the cell. In this study; the availability of Malondialdehyde, Superoxide dismutase, Catalase and Reduced glutathione levels as markers for related diseases was evaluated by examining whether and in what range they may vary in some diseases. In study, nine groups consist of prostate cancer, cirrhosis, liver transplantation, chronic kidney damage, acute kidney injury, X-ray exposure, CT exposure, MR exposure and Osteonecrosis. Analysis of means is a method developed to compare group means with the overall mean and presents the results graphically in an easy-to-understand manner without the required for any post hoc test. In addition, related characteristics were categorized as “low and high” and Nonlinear Principal Component Analysis was conducted to visually present their relationship with related disease types in two-dimensional space. The upper and lower decision lines were found 3.123 and 2.794 μmol/L, respectively for Malondialdehyde. Those with cirrhosis, chronic kidney disease, acute kidney disease and tomography exposure were included in the upper and lower decision lines. Those with prostate cancer, osteonecrosis, and X-ray exposure were above the upper decision line and are found higher than the overall mean. Those with lung transplantation and MR exposure appear to be below the lower decision line and lower than the overall mean. The present study provides the first comprehensive assessment of the availability of Malondialdehyde, Superoxide dismutase, Catalase and Reduced glutathione levels as markers for some related diseases. This study has shown that Analysis of means can be used as an alternative graphical procedure for multiple group comparisons with an overall mean in the studies regarding as biochemical characteristics and relating diseases. In addition, Nonlinear Principal Component Analysis can be useful aid for decision marker in some biochemical characteristics and related diseases.
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- 2022
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7. The Effect of Pre-Harvest Gibberellic Acid Applications on-Tree Storability and Fruit Quality in 'Valencia Late' Orange
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Gülendam Sezer, Adalet Mısırlı, Fatih Şen, and Nihal Acarsoy Bilgin
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turunçgil ,büyüme düzenleyiciler ,meyve dökümü ,renk ,kayıplar ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
In this study, it was aimed to determine the effects of gibberillic acid (GA3) applications on drop and quality changes of fruits on-tree storage period. GA3 (before peel color break, on the peel color break and both periods) and 20 ppm GA3 (before peel color break and on the peel color break) were applied to the trees, and the untreated trees constituted the control group. Fruits were harvested in five periods at monthly intervals from april. In the last harvest period, the average fruit drop rate was significantly higher in the control group (38.48%) than in the color transformation 10 ppm GA3 (9.44%) and before color transformation 20 ppm GA3 (19.28%). The fruit drop was not observed in the first and second harvest periods. Especially in the first period on-tree storage, the shell C* and h° values of the fruits in control were found higher than the GA3 application. As a result, twice application of 10 ppm GA3 in 'Valencia Late' orange reduced pre-harvest fruit drop, delayed peel color transformation and limited fruit quality change. Accordingly, it has been revealed that it allows on-tree storability until the end of august.
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- 2020
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8. Acute anterior myocardial infarction during myopericarditis treatment in a very young adult
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Alparslan Kurtul, Fatih Şen, and Özkan Bekler
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myopericarditis ,acute myocardial infarction ,non-steroidal anti-inflammatory drugs ,ibuprofen ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2020
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9. Impact of Postharvest Putrescine Treatments on Phenolic Compounds, Antioxidant Capacity, Organic Acid Contents and Some Quality Characteristics of Fresh Fig Fruits during Cold Storage
- Author
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Emine Kucuker, Erdal Aglar, Mustafa Sakaldaş, Fatih Şen, and Muttalip Gundogdu
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fig ,storage ,putrescine ,bioactive compounds ,organic acids ,Botany ,QK1-989 - Abstract
The storage and shelf life of the fig, which has a sensitive fruit structure, is short, and this results in excessive economic losses. In a study carried out to contribute to the solution of this problem, the effect of postharvest putrescine application at different doses (0, 0.5, 1.0, 2.0, and 4.0 mM) on fruit quality characteristics and biochemical content during cold storage in figs was determined. At the end of the cold storage, the decay rate and weight loss in the fruit were in the ranges of 1.0–1.6% and 1.0–5.0 %, respectively. The decay rate and weight loss were lower in putrescine-applied fruit during cold storage. Putrescine application had a positive effect on the changes in fruit flesh firmness values. The SSC rate of fruit varied between 14 and 20%, while significant differences in the SSC rate occurred depending on storage time and putrescine application dose. With putrescine application, the decrease in the acidity rate of the fig fruit during cold storage was smaller. At the end of the cold storage, the acidity rate was between 1.5–2.5% and 1.0–5.0. Putrescine treatments affected total antioxidant activity values and changes occurred in total antioxidant activity depending on the application dose. In the study, it was observed that the amount of phenolic acid in fig fruit decreased during storage and putrescine doses prevented this decrease. Putrescine treatment affected the changes in the quantity of organic acids during cold storage, and this effect varied depending on the type of organic acid and the length of the cold storage period. As a result, it was revealed that putrescine treatments can be used as an effective method to maintain postharvest fruit quality in figs.
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- 2023
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10. Structure determination, vibrational bands and chemical shift assignments of 3-(4-(3-(2,5-dimethylphenyl)-3-methylcyclobutyl)thiazol-2-yl)-2-(o-tolyl)thiazolidin-4-one: A combined experimental and quantum chemical density-functional theory studies
- Author
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Fatih Şen
- Subjects
cyclobutane • thiazole • thiazolidine • scxrd • ir and nmr ,Chemical engineering ,TP155-156 ,Biochemistry ,QD415-436 - Abstract
This paper report is an analysis of the title compound by means of X-ray crystallography, FT-IR, NMR and DFT calculations, in the context of structural and spectral characterization. The crystal and molecular structures of the compound were determined by single-crystal X-ray diffraction (SCXRD). Fourier Transform Infrared (FTIR) spectrum was recorded in the range from 400 cm–1 to 4000 cm–1. The 1H and 13C nuclear magnetic resonance (NMR) spectra were also recorded. DFT calculations were employed to support X-ray molecular geometry and calculate IR and NMR (1H and 13C) spectral bands. The structural (bond lengths, bond angles, torsion angles) and spectral (vibrational modes and chemical shifts) parameters obtained from DFT levels (B3LYP/6-31G(d,p) and B3LYP/6-31G+(d,p)) were compared with experimental findings, and an excellent harmony between the two data was ascertained.
- Published
- 2019
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11. Quantum Computational Investigation of (E)-1-(4-methoxyphenyl)-5-methyl-N′-(3-phenoxybenzylidene)-1H-1,2,3-triazole-4-carbohydrazide
- Author
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Halil Gökce, Fatih Şen, Yusuf Sert, Bakr F. Abdel-Wahab, Benson M. Kariuki, and Gamal A. El-Hiti
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DFT ,Hirshfeld surface analysis ,1H-1,2,3-triazole-4-carbohydrazide ,molecular docking ,drug-likeness ,Organic chemistry ,QD241-441 - Abstract
The title compound was synthesized and structurally characterized. Theoretical IR, NMR (with the GIAO technique), UV, and nonlinear optical properties (NLO) in four different solvents were calculated for the compound. The calculated HOMO–LUMO energies using time-dependent (TD) DFT revealed that charge transfer occurs within the molecule, and probable transitions in the four solvents were identified. The in silico absorption, distribution, metabolism, and excretion (ADME) analysis was performed in order to determine some physicochemical, lipophilicity, water solubility, pharmacokinetics, drug-likeness, and medicinal properties of the molecule. Finally, molecular docking calculation was performed, and the results were evaluated in detail.
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- 2022
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12. The dye removal from aqueous solution using polymer composite films
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Fatih Şen, Özkan Demirbaş, Mehmet Harbi Çalımlı, Ayşenur Aygün, Mehmet Hakkı Alma, and Mehmet Salih Nas
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Adsorption ,Composite film ,Polyethylene ,Thermodynamic parameters ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
Abstract The composite consisted of clay and polymers like polyethylene (GCP) was used to remove methylene blue (MB) from the water. The most effective pH, temperature and initial dye concentration in adsorption process were found to be 9, 55 °C and 5 × 10−6 M, respectively. The results of the experiment showed that the adsorption process was compatible with the pseudo-second-order model. Activation parameters of ΔG: − 70.64 K J mol−1, ΔS: − 70.64 J mol−1 K−1, E a: 12.37 K J mol−1 at 308 °C were calculated and showed that adsorption process was exothermic and spontaneous. The results revealed that adsorption of MB on composite GCP was spontaneous and the composite of GCP f could be used for removing of MB from the water.
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- 2018
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13. Immobilization kinetics and mechanism of bovine serum albumin on diatomite clay from aqueous solutions
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Mehmet Harbi Çalımlı, Özkan Demirbaş, Aysenur Aygün, Mehmet Hakkı Alma, Mehmet Salih Nas, and Fatih Şen
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Adsorption ,Diatomite clay ,Thermodynamic ,Protein ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
Abstract In this research, adsorption properties of bovine serum albumin (BSA) on diatomite clay, which is an oxide mineral, were studied as a function of BSA, sodium phosphate buffer and protein concentration and pH and the thermodynamic parameters of adsorption process were investigated. The BSA adsorption experiment onto diatomite clay indicated that the BSA solution reached the maximum adsorption value at pH 5.5. It was observed that the maximum adsorption capacity (qm) of the data obtained from the adsorption studies showed a great dependence on pH. The maximum amount of adsorption in adsorption experiments can be considered as points where the electrostatic interaction for pH is appropriate. Both structural and electrostatic interaction in regions outside of the isoelectric point may have caused a decrease in BSA absorbance. The structural influences were associated with different conformational states that while BSA molecules accept changes with pH, electrostatic effects can be observed in BSA molecules behaved like soft particles. In this case, it is not possible to explain the independence of the qm–pH curves of the amount of adsorption. The protein molecules at this point are very stable. Because this value is close to the isoelectric point of serum albumin. The surface structural change of BSA and diatomite clay was studied. For this, Fourier transform infrared spectroscopy (FTIR) spectroscopy values were compared before and after the experiment. The diatomite samples used as support material were characterized by FTIR, scanning electron microscopy, thermogravimetric analysis and Brunauer Emmett–Teller surface area analysis. The thermodynamic functions such as enthalpy, entropy, Gibbs free energy and activation energy were investigated in their experimental work. The thermodynamic parameters such as Gibbs free energy (ΔG*), E a, ΔH* and ΔS* were calculated as − 67.45, 15.41, − 12.84 kJ mol−1 and − 183.28 J mol−1 K−1 for BSA adsorption, respectively. We can deduce that the adsorption process from the data obtained from the thermodynamic parameters is spontaneous and exothermic. The adsorption of the process was investigated using Eyring and Arrhenius equations, and its adsorption kinetic found to be coherent with the pseudo-second-order model. As a result, we reached that the diatomite clay is a suitable adsorbent for the BSA. Experimental results showed that diatomite clay has the potency to be used for rapid pretreatment in the process of identifying proteins.
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- 2018
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14. Changes in fruit quality during storage of different brown tomato varieties grown in greenhouse soilless culture
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Fatih ŞEN, Rüştü Efe OKŞAR, and Ayşe GÜL
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Physico-chemical properties ,Kumato tomato ,Storage ,Greenhouse ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
The brown (Kumato) tomato is distinguished by its distinctive 'brown' appearance and sweet aroma, unlike the usual red tomatoes. In this study, quality changes of KM8367, KM8034 and KM1210 Kumato tomato cultivars grown in the plastic greenhouse by soilless culture method were investigated during storage. Tomato fruits harvested at commercial maturity stage were stored in cardboard boxes at 7°C and 85-90% relative humidity for 21 days. Some physical, chemical and biochemical analyses were carried out at the beginning of storage and 7 days intervals during storage period. During storage, fruit weight, width and height in KM8367, total soluble solids, total phenol amount and antioxidant activity in KM1210 were found high, and fruit firmness and TA amounts in KM8034 variety were found low. Changes in color values (C*, h°) of Kumato tomato varieties were similar during storage. It was determined that the effect of storage time on quality parameters of Kumato tomato fruits was limited. These varieties have been shown to protect marketable qualities at the end of 21 days of storage.
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- 2018
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15. Spectroscopic and molecular modeling studies of N-(4-(3-methyl-3-phenylcyclobutyl)-3-phenylthiazole-2(3H)-ylidene)aniline by using experimental and density functional methods
- Author
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Fatih Şen, Öner Ekici, Muharrem Dinçer, and Alaaddin Cukurovali
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Cyclobutane ,Thiazole ,Density functional theory (DFT) ,Non-linear optical effects ,Frontier molecular orbital analysis (FMO) ,Chemistry ,QD1-999 - Abstract
In the present study, a combined experimental and computational study on molecular structure and spectroscopic characterization on the title compound has been reported. The crystal was synthesized and its molecular structure brought to light by X-ray single crystal structure determination. The spectroscopic properties of the compound were examined by FT-IR and NMR (1H and 13C) techniques. FT-IR spectra of the target compound in solid state were observed in the region 4000–400 cm−1. The 1H and 13C NMR spectra were recorded in CDCl3 solution. The molecular geometries were those obtained from the X-ray structure determination optimized using the density functional theory (DFT/B3LYP) method with the 6-31G(d, p) and 6-31G+(d, p) basis set in ground state. From the optimized geometry of the molecule, geometric parameters (bond lengths, bond angles and torsion angles), vibrational assignments and chemical shifts of the title compound have been calculated theoretically and compared with those of experimental data. Besides, molecular electrostatic potential (MEP), frontier molecular orbitals (FMOs), Mulliken population analysis, Thermodynamic properties and non-linear optical (NLO) properties of the title molecule were investigated by theoretical calculations.
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- 2017
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16. Predictors of neurologically favorable survival among patients with out-of-hospital cardiac arrest: A tertiary referral hospital experience
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Kevser Gülcihan Balcı, Mustafa Mücahit Balci, Fatih Şen, Mehmet Kadri Akboğa, Erol Kalender, Samet Yılmaz, Orhan Maden, Hatice Selçuk, Timur Selçuk, and Ahmet Temizhan
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cardiac arrest ,ischemia ,survival. ,Medicine ,Internal medicine ,RC31-1245 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Objective: Despite recent advances in medical support and interventions, only 5% to 10% of patients with out-of-hospital cardiac arrest (OHCA) survive to discharge. In this study, factors related to neurologically favorable survival in patients with OHCA were analyzed. Methods: A total of 129 patients who were admitted to hospital with OHCA were retrospectively enrolled. Results: Sustained return of spontaneous circulation (ROSC) (ROSC lasting >20 min) was achieved in 29 (22.4%) patients. Percentage of cardiac arrests with ischemic etiology was significantly higher in successful ROSC group (p
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- 2017
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17. Purification and characterization of glutathione S-transferase from blueberry fruits (Vaccinium arctostaphylos L.) and investigated of some pesticide inhibition effects on enzyme activity
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Neslihan Balcı, Fikret Türkan, Halis Şakiroğlu, Ayşenur Aygün, and Fatih Şen
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Natural product chemistry ,Food science ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Pesticides cause pollution by remaining in water, soil, fruits and vegetables for a long time and also reach human through the food chain. It was thought that some pesticides used in agriculture could adversely affect the antioxidant enzyme system and the minimum inhibition values were studied. glutathione s-transferase (GST), an important antioxidant enzyme, catalyzes the conjugation of glutathione with toxic metabolites. It was purified from the blueberry fruits. The purification of the enzyme was performed separately by affinity and gel filtration chromatography. The purity of the enzyme was determined by SDS-PAGE electrophoresis. Characterization studies were done for the enzyme. For this purpose, optimal pH, temperature, Km and Vmax values for GSH and CDNB were also determined for the enzyme as 7.2 in K-phosphate buffer, 50 °C, 1.0 M, 7.0 in K-phosphate buffer, 1.57 mM; 0.17 mM and 0.048 EU/mL, 0.0159 EU/mL, respectively. Additionally, inhibitory effects of some pesticides; dichlorvos, acetamiprid, cyhalothrin, haloxyfop-p-Methyl, 2,4 dichlorophenoxy acetic acid, cypermethrin, imidacloprid, fenoxaprop-p-ethyl, glyphosate isopropylamine salt were examined the enzyme activity in vitro by performing Lineweaver–Burk graphs and plotting activity % IC50 and Ki values were calculated for each of pesticides. All of the pesticides inhibited the GST enzyme at millimolar level. Pesticide showing the best inhibitory effect was found as dichlorvos. The Ki value which is the inhibition constant of this pesticide was 0.0175 ± 0.005.
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- 2019
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18. Mikrodalga ile Islak Viyolün Kurutulabilirliğinin Deneysel Olarak Belirlenmesi
- Author
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Mustafa GÖLCÜ and Fatih ŞEN
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microwave ,viol ,drying. ,mikrodalga ,viyol ,kurutma. ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Yumurta kolisi (viyol) imalatının en önemli süreçlerinden biri kurutma işlemidir. Viyol hamuru kalıplara döküldükten sonra yapısında bulunan su moleküllerini yok etmek için kurutma işlemi gerçekleştirilmektedir. Endüstride viyol kurutma işlemi geleneksel kurutma sistemleri ile yapılmaktadır. Yapılan bu çalışmada ise; özel olarak tasarlanıp imal edilmiş prototip konveyörlü mikrodalga fırın sisteminde ıslak viyolün kurutma deneyleri yapılmıştır. Deneyler sonucunda, magnetron gücünün artmasıyla nem oranının düştüğü, dolayısıyla viyolün kurutma süresinin azaldığı görülmüştür.
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- 2014
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19. Mikrodalga ile Islak Viyolün Kurutulabilirliğinin Deneysel Olarak Belirlenmesi
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Fatih Şen and Mustafa Gölcü
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microwave ,viol ,drying. ,mikrodalga ,viyol ,kurutma. ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Yumurta kolisi (viyol) imalatının en önemli süreçlerinden biri kurutma işlemidir. Viyol hamuru kalıplara döküldükten sonra yapısında bulunan su moleküllerini yok etmek için kurutma işlemi gerçekleştirilmektedir. Endüstride viyol kurutma işlemi geleneksel kurutma sistemleri ile yapılmaktadır. Yapılan bu çalışmada ise; özel olarak tasarlanıp imal edilmiş prototip konveyörlü mikrodalga fırın sisteminde ıslak viyolün kurutma deneyleri yapılmıştır. Deneyler sonucunda, magnetron gücünün artmasıyla nem oranının düştüğü, dolayısıyla viyolün kurutma süresinin azaldığı görülmüştür.
- Published
- 2014
20. Medicolegal Approach to Child Physical Abuse in an Emergency Clinic
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Akan Karakuş, İsmail Özgür Can, Mustafa Dalgıç, Esra Gürlek Olgun, Fatih Şen, and İsmail Cezmi Yavuz
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Emergency clinic ,child abuse ,ocular findings ,autopsy ,Medicine ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Child abuse is a global health problem. For this reason, it is important to perform suitable medical approaches in suspected cases of child abuse in the emergency room. The first consideration is performing life-saving medical approaches. Reporting the case to judicial authorities and the correlation of medical examination findings with medicolegal history are other important steps. We report a case of a 3-year-old male child who died after severe physical abuse. In suspected cases of child abuse, examination of the fundus is important. If death occurs, histopathological examination of eye globes must be performed to determine the cause of death. The present case was the first in which eye globe examination was performed in Izmir, Turkey. Autopsy findings revealed subdural hemorrhage and subarachnoid hemorrhage caused by blunt trauma. The cause of death was blunt head trauma, and the manner of death was listed as homicide. Except for microhemorrhages in the optic nerve sheath, no pathological finding was identified in the retina. Retinal hemorrhage can be seen in child abuse cases, and it is associated with a poor prognosis if present; however, the absence of retinal hemorrhage does not exclude child abuse. Crime scene investigation findings, witnesses’ statements, medical records, and autopsy findings must all be taken into consideration in child abuse cases in a correlative and holistic manner.
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- 2015
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21. trans-Bis(nitrato-κO)tetrakis(1-vinyl-1H-imidazole-κN3)copper(II)
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Fatih Şen, Ramazan Şahin, Ömer Andaç, and Murat Taş
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Crystallography ,QD901-999 - Abstract
In the title compound, [Cu(NO3)2(C5H6N2)4], the CuII ion is located on an inversion centre. It features a Jahn–Teller-distorted octahedral coordination geometry, defined by four N atoms of four 1-vinylimidazole ligands in the equatorial plane and two nitrate O atoms in the axial positions. The nitrate anion is disordered over two sets of sites in a 0.801 (6):0.199 (6) ratio. In the crystal, the complex molecules are linked by weak intermolecular C—H...O and C—H...π interactions.
- Published
- 2012
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22. 4-Chloro-2-[(4-chlorobenzylidene)amino]phenol
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Kürşat Efil, Fatih Şen, Yunus Bekdemir, and Orhan Büyükgüngör
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Crystallography ,QD901-999 - Abstract
In the title Schiff base compound, C13H9Cl2NO, the molecule displays an E conformation about the imine C=N double bond, with a dihedral angle of 8.09 (11)° between the two benzene rings. In the crystal, molecules are linked by a single O—H...O hydrogen bond, giving one-dimensional chains which extend along (100).
- Published
- 2012
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23. 1,1′-Bis(3-methyl-3-phenylcyclobutyl)-2,2′-(azanediyl)diethanol
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Fatih Şen, Muharrem Dinçer, Alaaddin Çukurovalı, and Ibrahim Yılmaz
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Crystallography ,QD901-999 - Abstract
The title molecule, C26H35NO2, contains two cyclobutane rings that adopt butterfly conformations and are linked by a –CH(OH)CH2NHCH2CH(OH)– bridge. In the crystal, N—H...O, O—H...N and O—H...O hydrogen bonds together with C–H...π interactions link the molecules.
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- 2012
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24. (Z)-1-(3-Mesityl-3-methylcyclobutyl)-2-(morpholin-4-yl)ethanone oxime
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Fatih Şen, Muharrem Dinçer, Alaaddin Çukurovalı, and Ibrahim Yılmaz
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Crystallography ,QD901-999 - Abstract
In the title compound, C20H30N2O2, the cyclobutane ring is puckered, with a dihedral angle of 19.60 (13)° between the two planes. In the crystal, the molecules are linked by intermolecular O—H...N and weak C—H...O hydrogen bonds, as well as a C—H...π hydrogen-bonding association.
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- 2011
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25. İş Kazası Öyküsü Verilen Bir Cinayet Olgusu
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Serpil Salaçin, Necmi Çekin, Mete Korkut Gülmen, Fatih Şen, and Mehmet Hakan Özdemir
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av tüfeği yaralanması ,ölüm nedeni ,olay yeri keşfi ,adli soruşturma ,otopsi ,Medicine (General) ,R5-920 - Abstract
Adli soruşturmalar; adli tahkikat, olay yeri incelemeleri, otopsi ve laboratuvar bulgularını kapsar. Ölüm sebebinin saptanması, elde edilen tüm bilgilerin dikkatlice toparlanmasına dayanır. Otopsi yapılmaksızın, adli tahkikata dayanarak ölüm sebebinin belirtilmesi ve defin ruhsatı düzenlenmesi sonucunda; kararın yeniden gözden geçirilmesinin gerektiği durumlar ortaya çıkabilir. Bu yazıda; bir inşaatın zemininde bulunan cesedin, savcılık tarafından yapılan olay yeri incelemesi sırasındaki görüşmelerde; kişinin iş kazası sonucu kafa travmasına bağlı olarak öldüğü ifade edilmiştir. Yapılan otopside ise; kişinin av tüfeği yaralanması sonucu meydana gelen yaralanmalar nedeniyle öldüğü belirlenmiştir. Bu olgu, adli olayların sağlıklı çözümünde yaklaşımların önemini vurgulamak amacıyla sunulmaktadır. Anahtar Kelimeler: Av Tüfeği Yaralanması, Ölüm Nedeni, Olay Yeri Keşfi, Adli Soruşturma, Otopsi.
- Published
- 1996
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26. BIOSENSORS: TYPES, APPLICATIONS, AND FUTURE ADVANTAGES
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Aleyna GUNDOGDU, Gizem GAZOGLU, Elif KAHRAMAN, Esma YİLDİZ, Gizem CANDİR, Duygu YALCİN, Atakan KOÇ, and Fatih ŞEN
- Abstract
With the developing technology and increasing population, nanotechnology has started to be used in all areas of life. The use of biosensors, which have an important place in the field of nanotechnology, is increasing day by day. Biosensors can be defined as biological devices that help us interpret the analyte concentration in a sample by converting it into measurable signals. Advantageously, it has both speed and high precision. There are many types of biosensors used in many fields. These; enzymatic, nucleic acid, electrochemical and optical biosensors. All of them can have different components and uses. Biosensors are used especially in early diagnosis of diseases, environment and agriculture, pharmaceutical industry, defense industry and food industry. For example, biosensors are used in the treatment of oncological diseases using electrochemical impedance spectroscopy, in the determination of pesticides, which is one of the environmental pollutants, in the potentiometric analysis of glutamate, in the detection of chemical warfare agents and toxic substances. In addition, it is expected that the usage areas of biosensors will become widespread in the future, and they will be used more widely in the early diagnosis of diseases. At this point, the use of biosensors has increased worldwide and has attracted the attention of scientists. In this study, classification of biosensors, application areas, characterization, studies on biosensors, technologies developed and applied for the future are mentioned.
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- 2023
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27. Highly efficient carbon hybrid supported catalysts using nano-architecture as anode catalysts for direct methanol fuel cells
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Hakan Burhan, Kubilay Arikan, Mehmet Hakkı Alma, Mehmet Salih Nas, Hassan Karimi-Maleh, Fatih Şen, Fatemeh Karimi, and Yasser Vasseghian
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Fuel Technology ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Condensed Matter Physics - Published
- 2023
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28. Computational Study of a Novel Compound with Thioether-Bridge
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Fatih Şen, Alaaddin Cukurovalı, and Yusuf Sert
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Polymers and Plastics ,Organic Chemistry ,Materials Chemistry - Published
- 2022
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29. A comparison of the effects of inspiratory muscle strength and endurance training on exercise capacity, respiratory muscle strength and endurance, and quality of life in pacemaker patients with heart failure: A randomized study
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Nihan Katayıfçı, Meral Boşnak Güçlü, and Fatih Şen
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Heart Failure ,Pulmonary and Respiratory Medicine ,Pacemaker, Artificial ,Exercise Tolerance ,Critical Care and Intensive Care Medicine ,Breathing Exercises ,Respiratory Muscles ,Endurance Training ,Dyspnea ,Quality of Life ,Humans ,Muscle Strength ,Cardiology and Cardiovascular Medicine ,Fatigue - Abstract
Studies have widely investigated the effects of inspiratory muscle strength training in patients with heart failure (HF). The effects of inspiratory muscle strength or endurance training on outcomes in patients with pacemakers have not been adequately studied.The aim was to compare the effects of inspiratory muscle strength and endurance training on exercise capacity, quality of life (QoL), peripheral and respiratory muscle strength, respiratory muscle endurance, pulmonary function, dyspnea, fatigue, and physical activity levels in pacemaker patients with HF.A randomized, controlled, double-blind study was conducted. Fourteen pacemaker patients with HF received inspiratory muscle strength training (IMST) at 50% of maximal inspiratory pressure (MIP), and 18 patients received endurance training (IMET) at 30% of MIP 7 days/8 weeks. Exercise capacity [6 min. walking test (6MWT) and the Incremental Shuttle Walking Test (ISWT)], pulmonary function, respiratory muscle strength [MIP, maximal expiratory pressure (MEP)], endurance, peripheral muscle strength, dyspnea, fatigue, QoL, and physical activity level were evaluated before and after.Demographic characteristics were similar in IMST (3F/11M, 56.92 ± 7.61y, EF: 25%, ICD/CRT:11/3) and IMET (4F/14M, 56 ± 10.77y, EF: 30%, ICD/CRT:16/2) groups (p 0.05). Significant improvements were present in MIP, MEP, respiratory muscle endurance, peripheral muscle strength, 6MWT and ISWT walking distances, dyspnea, QoL, physical activity level, fatigue scores within groups (p ≤ 0.05). However, there were no significant differences between the groups (p 0.05). There were no significant improvements in FEVInspiratory muscle strength and endurance training similarly improves respiratory and peripheral muscle strength, exercise capacity, QoL, physical activity level, and decreases dyspnea and fatigue and are safe and effective in pacemaker patients with HF.www.gov; study number: NCT03501355.
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- 2022
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30. SILVER NANOPARTICLE SYNTHESIS BY BIOGENIC REDUCTION METHOD AND INVESTIGATION OF ANTIMICROBIAL, ANTIBIOFILM, ANTICANCER ACTIVITIES
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Funda KARAKAYA, Ali Savaş BÜLBÜL, Muhammed BEKMEZCİ, and Fatih ŞEN
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It is very important to use the green synthesis approach that uses living things and plants. Using the biogenic reduction technique, silver nanoparticles were synthesized from the R. aculeatus plant for this research. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, X-ray diffraction (XRD), and UV-vis spectroscopy was used to characterize the produced AgNPs (FT-IR). After the material characterization of NPs, their antibacterial properties were investigated against 15 different bacterial strains. Disk diffusion and microdilution techniques were used in the examination. In the disk diffusion study, the extract and AgNP gave the best results. In plant extract studies, Bacillus subtilis and Enterobacter aerogenes ATCC 13048 had the highest antibiofilm activity, whereas Staphylococcus aureus ATCC 25923 had the lowest. The Salmonella infantis bacterial strain showed the maximum action on AgNP, whereas Escherichia coli CFAI ATCC 25922 had the lowest. At the concentrations established in cytotoxic activity experiments, the plant-AgNP complex had the lowest concentration value on MCF-7 and HUVEC cell lines of 10-3 g/mL. There was no cytotoxic effect of the extract on the MCF-7 cell line. It had a cytotoxic activity of 10-3 g/ml at the lowest concentration in the HUVEC cell line. An important research result was obtained for the investigation of the antibacterial, antibiofilm, and anticancer effects of R. aculeatus plant extract and biogenically derived AgNPs. The comparative study on both breast cancer cell lines and healthy cell lines in the area of cell culture offers a wide range of resources for science in addition to the comparative data of the study done based on both plant extract and AgNP.
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- 2023
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31. Yapraktan Farklı Biyostimülant Uygulama Programlarının ‘0900 Ziraat’ Kiraz Meyvelerinin Kalitesi ve Hasat Sonrası Dayanımına Etkisi
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Fatih ŞEN, Deniz EROĞUL, and Ömer ALTUNTAŞ
- Abstract
Kiraz meyvelerinde irilik en önemli kalite parametrelerinden biri olup, ihraç edilecek kiraz meyvelerinin iri olması istenmektedir. Bu çalışmada kiraz ağaçlarına yapraktan yapılan farklı biyostimülant uygulama programlarının meyve iriliği, kalitesi ve hasat sonrası dayanımlarına etkilerinin belirlenmesi amaçlanmıştır. ‘0900 Ziraat’ kiraz ağaçlarına yapraktan yapılan uygulamalar meyve tutumundan hemen sonra, meyveler nohut büyüklüğünde ve renk dönüm aşamasında olmak üzere 3 farklı dönemde Nutri Activ (NA, 2 mL L-1), Multi-K (MK, 2 mL/L), Nutri Growth (NG, 2 mL/L), Glofert 30.10.10 (GL, 2 g/L) ve Flozin (FL, 1.5 g/L) farklı şekilde kombine edilerek oluşturulan programlar uygulanmıştır. Ticari programda nohut büyüklüğünde ve renk dönüm aşamasında sırasıyla GA3 (20 ppm) ve Sweet (3 ml/L) uygulanırken uygulama yapılmayanlar kontrol olarak kabul edilmiştir. Tam olum döneminde hasat edilen kiraz meyvelerinde hasat ve 21 günlük depolama sonrasında bazı ölçüm ve analizler yapılmıştır. NA, NG+GL, MK+FL (RZ 3) ve NA, NG+GL, MK+FL+NG+GL (RZ 4) programlarının uygulanması kiraz meyvelerinin çapını ve SÇKM miktarını, RZ 3 programının uygulanması sertliği arttırmıştır. Tüm veriler değerlendirildiğinde, RZ 3 programı uygulamasının meyve çapı, sertliği ve SÇKM miktarını arttırması ve bu olumlu etkilerini depolama sonrasında da sürdürmesinden dolayı başarılı bulunmuştur.
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- 2022
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32. Effects of 1-methylcyclopropene, methyl jasmonate and salicylic acid on physicochemical properties and wooliness of nectarine fruit during cold storage
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Fatih Sen, Enes Yilmaz, and Burhan Ozturk
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Antioxidant ,Flesh firmness ,Phenolics ,Plant growth regulators ,Weight loss ,Botany ,QK1-989 - Abstract
Abstract Background Owing to its high perishability, the market life of nectarine fruit is very short. Cold storage is a principal approach to limit post-harvest quality loss in nectarines. The objective of this research was to evaluate the impact of postharvest methyl jasmonate (MeJA), salicylic acid (SA) and 1-methylcyclopropene (1-MCP) on quality properties of nectarine fruit, specifically weight loss, firmness, phenolics and antioxidant activity, following cold storage and subsequent shelf life. Fruit immersed in water were considered as control. The fruit were stored at 0 ± 0.5 °C and 90 ± 5% RH for 56 d, then kept at 20 ± 0.5 °C and 70 ± 5% RH for 2 d in shelf life. Results The results demonstrated that single or combined treatments of MeJA, SA and 1-MCP were effective on quality characteristics. During cold storage, fruit treated with MeJA + 1-MCP (3.66%) and SA + 1-MCP (3.54%) exhibited lower weight loss than the control (4.08%). In the final two measurements of storage, the flesh firmness of fruit treated with SA + 1-MCP (54.5 and 54.06 N, respectively) was higher than that of the control. At the end of cold storage, the SA + 1-MCP treatment (17.4%) exhibited higher soluble solids than the control (15.37%) and SA (15.20%) treatments. However, the total phenolics content was found to be higher in nectarine fruit treated with single SA than in the control, as well as in fruit treated with SA + 1-MCP and single 1-MCP. Wooliness in fruit treated with 1-MCP, SA and MeJA was found to be lower than in the control, while fruit had higher acceptance. Conclusions As a result, the SA + 1-MCP and MeJA + 1-MCP treatments were more efficacious in retarding the weight and firmness decline of nectarine fruit during storage. Also, it was revealed that 1-MCP, SA and MeJA could be employed as efficacious instruments in nectarine fruit with respect to wooliness and acceptance, which influence consumer preferences.
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- 2024
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33. Impact of postharvest calcium chloride treatments on decay rate and physicochemical quality properties in strawberry fruit
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Deniz Eroğul, Muttalip Gundogdu, Fatih Sen, and Akgul Tas
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Strawberry ,CaCl2 ,Storage ,Quality characteristics ,Phenolic compounds ,Organic acids ,Botany ,QK1-989 - Abstract
Abstract Background Post-harvest losses cause significant product losses in the world, which leads to food waste. Therefore, it is of great importance for people to have access to sufficient amounts of products by increasing the storage period of fruits with applications such as post-harvest calcium chloride (CaCl2). In this study, the effect of calcium chloride (CaCl2) on physical quality parameters and bioactive contents of stored strawberry fruit (Albion cv.) was investigated. Accordingly, strawberries were treated with 2%, 4% and 6% CaCl2 before storage and stored for 15 days (0 ± 0.5 °C and 90 ± 5% RH). Analyses and measurements were conducted every 5 days during the storage period.Weight loss, decay rate, soluble solids content (SSC), acidity, pH, respiration rate, organic acids (malic, citric, ascorbic, fumaric, oxalic, succinic and tartaric) and phenolic compounds (catechin, chlorogenic, ferulic, gallic, o-coumaric, p-coumaric, protocatechuic, quercetin, rutin and syringic) were analyzed as quality parameters during storage. Results In the study, in general, the best values were observed in 6% CaCl2-treated fruits in terms of weight loss, SSC, TA, decay and respiration rates, although they varied according to different storage periods. Similarly, in terms of phenolic compounds, organic acids and vitamin C, 6% CaCl2-treated fruits had significantly better prevention of quality losses. In addition, the most common phenolic compound of strawberry fruits was gallic acid, followed by chlorogenic acid and catechin, respectively. On the other hand, the predominant organic acid observed in the fruits was malic acid, followed by citric acid, succinic acid and oxalic acid, respectively. Conclusions In this study, it was observed that CaCl2 applications more effectively prevented weight loss and decay rate by reducing the respiration rate compared to the control group at the end of the storage period (15th day). It was concluded that, particularly, the 6% CaCl2 dose can be used as an important treatment to extend storage life by preserving fruit quality and biochemical changes.
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- 2024
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34. Defining the soft-docking of Avalonia and Baltica and the Caledonian Orogeny in the İstanbul-Zonguldak Tectonic Unit (NW Turkey): Geochronological and geochemically data from the Silurian gabbro apophyses and dykes in the İstanbul Terrane
- Author
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Fatih Şen
- Abstract
The authors have requested that this preprint be removed from Research Square.
- Published
- 2023
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35. Ordovician arc and syncollisional magmatism in the İstanbul-Zonguldak Tectonic Unit (NW Turkey): Implications for the consumption of the Teisseyre-Tornquist Ocean in Far East Avalonia
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Fatih Şen
- Subjects
Geophysics ,Geochemistry and Petrology - Published
- 2023
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36. Coloring effect of iron oxide content on ceramic glazes and their comparison with the similar waste containing materials
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Fatih Şen, Zeynep Gizem Saritas, Melek Arslan, Selin Cıbuk, Fatma Gol, Emre Kacar, Cigdem Ture, and Ali Yilmaz
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Materials science ,Absorption of water ,Scanning electron microscope ,Process Chemistry and Technology ,Glaze ,Metallurgy ,Iron oxide ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Ceramic glaze ,law.invention ,chemistry.chemical_compound ,chemistry ,law ,visual_art ,Phase (matter) ,Materials Chemistry ,Ceramics and Composites ,visual_art.visual_art_medium ,Ceramic ,Chemical composition - Abstract
The effects of adding iron oxide to ceramic glaze formulations were studied in this study. Iron oxide was added in different weight ratios into the reactive transparent glaze, reactive opaque glaze, and transparent glaze formulations. The iron oxide content in the glaze composition, the coloring mechanisms, the phase distributions, and surface properties at temperatures of 950–1000-1050-1200 °C in the oxidation firing medium were investigated. Scanning Electron Microscopy (SEM) to determine the microstructural and morphological characterizations of the test glazes, X-Ray Diffractometry (XRD) to determine the crystallographic properties and phases, and X-Ray Fluorescence (XRF) analyses to determine the elemental and chemical composition were performed. In addition to these, surface images were examined with Digital Microscope (DM) and Commission Internationale de l'Eclairage (CIE) L*a*b, and water absorption values were compared. In addition, taking into account environmental factors, a comparison of ceramic glazes with the same amount of waste iron oxide was also performed for same purpose. As a result of the studies, it was observed that the addition of iron oxide and/or waste iron oxide did not have a negative effect, and coloring effects on the glaze layer were observed at different rates and firing temperatures.
- Published
- 2022
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37. Crystal structure and Hirshfeld surface analysis of 2-{[(E)-(3-cyclobutyl-1H-1,2,4-triazol-5-yl)imino]methyl}phenol
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Sevgi Kansiz, Mustafa Kemal Gümüş, Eiad Saif, Necmi Dege, Fatih Şen, and Gümüş, Mustafa Kemal
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crystal structure ,hirshfeld surface ,Triazole ,Crystal structure ,Dihedral angle ,Ring (chemistry) ,Medicinal chemistry ,microwave-assisted synthesis ,Research Communications ,chemistry.chemical_compound ,Cyclo but yl ,cyclobutyl ,General Materials Science ,cyclobutyl ,Salicyl aldehyde ,QD1-999 ,Schiff base ,Hydrogen bond ,salicylaldehyde ,General Chemistry ,Condensed Matter Physics ,salicylaldehyde ,Tautomer ,triazole ,Chemistry ,chemistry ,Salicylaldehyde - Abstract
2-{[(E)-(3-Cyclobutyl-1H-1,2,4-triazol-5-yl)imino]methyl}phenol was synthesized by an eco-friendly microwave-assisted method that is highly selective and efficient. In the crystal, molecules are linked by N—H⋯N and C—H⋯O hydrogen bonds., The title compound, C13H14N4O, was developed using the reaction of salicylaldehyde and 3-amino-5-cyclobutyl-1,2,4-triazole in ethanol under microwave irradiation. This eco-friendly microwave-promoted method proved to be efficient in the synthesis of 2-{[(E)-(3-cyclobutyl-1H-1,2,4-triazol-5-yl)imino]methyl}phenol in good yields and purity. The title compound is a Schiff base that exists in the phenol–imine tautomeric form and adopts an E configuration. The three independent molecules in the asymmetric unit (A, B and C) are not planar, the cyclobutyl and the phenol-imine rings are twisted to each other making a dihedral angle of 67.8 (4)° in molecule A, 69.1 (2)° in molecule B and 89.1 (2)° in molecule C. In each molecule an intramolecular O—H⋯N hydrogen bond is present, forming an S(6) ring motif. A Hirshfeld surface analysis was performed to investigate the contributions of the different intermolecular contacts within the supramolecular structure. The major interactions are H⋯H (53%), C⋯H (19%) and N⋯H (17%) for molecule A, H⋯H (50%), N⋯H (20%) and C⋯H (20%) for molecule B and H⋯H (57%), C⋯H (14%) and N⋯H (13%) for molecule C.
- Published
- 2021
38. Stability and validation of bionanomaterials
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Vildan Erduran, Elif Esra Altuner, and Fatih Şen
- Published
- 2023
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39. Green synthesized nanomaterials for bioimaging
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Elif Esra Altuner, Vildan Erduran, and Fatih Şen
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- 2023
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40. Contributors
- Author
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Elif Esra Altuner, Wajiha Anum, Néstor Armendáriz-Alonso, Rezwana Assad, Samudrika Aththanayaka, Yıldız Aydın, Rizwana Ayub, Humera Aziz, Lubna Azmi, Mansoor Ahmad Bhat, Rouf Ahmad Bhat, Muhammad Bilal, Candy Carranza-Álvarez, Luis J. Castillo-Pérez, Sagarika Ekanayake, Vildan Erduran, Erum Feroz, Eftade O. Gaga, Kadir Gedik, Suresh Ghotekar, Itzel Alejandra Guevara-Ramírez, Mir Zahoor Gul, Younis Ahmad Hajam, Shahnawaz Hassan, Ghulam Hussain Jatoi, Rehana Kausar, Zulaykha Khurshid, Tariq Mehmood, Marta Michalska-Domańska, Rochak Mittal, Tapas Mukherjee, Mahwash Mukhtar, Balakrishnan Munirathinam, Ghulam Murtaza, Adnan Mustafa, Sana Nafees, Huda Nafees, S. Nizamudeen, Ruben del Olmo Martinez, Sampita Pal, Soumya Pandit, Tanveer Bilal Pirzadah, Muhammad Akram Qazi, Raksha Rani, Beedu Sashidhar Rao, Mashal Rehman, Umair Riaz, Arpita Roy, Karuna Rupula, Marium Saba, null Sabreena, Naila Safdar, Afifa Saghir, Ezgi Çabuk Şahin, Fatih Şen, Mohammad Ashraf Shah, Laila Shahzad, Richa Sharma, Preeti Sharma, D.V. Siva Reddy, Muhammad Irfan Sohail, Jayesh M. Sonawane, Gobika Thiripuranathar, Fernanda Maria Policarpo Tonelli, Flávia Cristina Policarpo Tonelli, Ashutosh Triphati, Ahu Altınkut Uncuoğlu, Güldem Utkan, Divya Virupannanavar, Azra Yasmin, Qamar Uz Zaman, Ali Zarrabi, and Mahira Zeeshan
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- 2023
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41. In situ preparation of TiO2/f-MWCNT catalyst using Pluronic F127 assisted sol-gel process for sonocatalytic degradation of methylene blue
- Author
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Adnan Yildiz, Ömer Faruk Yesilbas, Mehmet Salih Nas, Mehmet Harbi Calimli, Ramazan Bayat, and Fatih Şen
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Biochemistry ,General Environmental Science - Published
- 2023
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42. New Inorganic Nanomaterials for Supercapacitors
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Gokcem Dasdemir, Mehmet Harbi Calimli, Anish Khan, and Fatih Şen
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Supercapacitor ,Materials science ,Nanotechnology ,Nanomaterials - Published
- 2021
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43. General Synthesis Methods of Inorganic Materials for Supercapacitors
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Fatih Şen, Tugba G. Karahan, Anish Khan, and Mehmet Harbi Calimli
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Materials science ,Synthesis methods ,Nanotechnology ,Inorganic materials - Published
- 2021
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44. Assessment of heavy metal contamination and its sources in urban soils of district Hyderabad, Pakistan using GIS and multivariate analysis
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Zia-ul-hassan Shah, Hassan Karimi-Maleh, S. I. Haider, R. K. Bux, Fatih Şen, Madeeha Batool, and Amber R. Solangi
- Subjects
Hydrology ,Environmental Engineering ,Multivariate analysis ,Metal contamination ,Abundance (ecology) ,Soil water ,Environmental Chemistry ,Environmental science ,Heavy metals ,Spatial variability ,Contamination ,General Agricultural and Biological Sciences ,Soil contamination - Abstract
Urban soil contamination with heavy metals is an indispensable phenomenon with grave implications on environmental and public health. The status and contamination sources of eight heavy metals were evaluated in urban soils of district Hyderabad, Pakistan through spatial variability mapping, using geographic information system (GIS) and multivariate analysis. The study involved 415 samples collected from the urban surface (1–25 cm depth) soils of district Hyderabad, Pakistan, using 1 × 1 km grid (for densely populated and industrial areas) or 2 × 2 km grid (from areas with buildings, roads, and other structures). The samples were properly processed in the laboratory and analysed on inductively coupled plasma-optical emission spectroscopy (ICP-OES). The metal clustering, correlation, and principal component analysis (PCA) suggested two groups of elements under study, the first including Cd, Cu, Ni, Pb and Zn and the second containing As, Mn and Cr. Higher values and relative standard deviation (RSD) advocated the anthropogenic origin of Cd, Cu, Ni, Pb and Zn and the natural abundance of As, Mn and Cr. The histograms and box-plots of Cd, Ni and Pb were also found abnormally distributed. Moreover, pollution index (PI) of Cd and Pb was > 1.0, i.e. 1.390 and 1.135, respectively. The GIS-based spatial variability geochemical maps, developed through inverse distance weighted (IDW) interpolation technique, highlighted the hotspots of metal contamination from various environmental sources, like, the highest concentration of Zn (125.1 mg kg−1) and Pb (76.4 mg kg−1) was found in city centre which suggested traffic emission mostly from the vehicle tires as main contamination source. The second highest concentration of Pb was observed in the surface soil associated with the Phulleli canal, passes through the Hyderabad city, which is under the threat of waste material deposited because of anthropogenic and industrial activities. In case of Ni, three hotspots were observed including the industrial area of Hyderabad, the city centre and the Phulleli canal with the average concentration of 57.0 mg kg−1. The single potential ecological risk (PER) index suggested moderate and considerable PER only in case of Cd with mean and highest values of 41.71 and 142.09, respectively. In all samples, Cd posed 27.70% moderate PER and 4.58% considerable PER. The integrated PER index of all elements suggested that majority (95%) of samples had low PER with a risk index of
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- 2021
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45. Numerical investigation of hydrogen production via autothermal reforming of steam and methane over Ni/Al2O3 and Pt/Al2O3 patterned catalytic layers
- Author
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Rachid Nebbali, John W. Sheffield, Ali Cherif, Nimeti Doner, Fatih Şen, and Şen, Fatih
- Subjects
Materials science ,Hydrogen ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Hydrogen Production ,02 engineering and technology ,010402 general chemistry ,Combustion ,01 natural sciences ,Methane ,Catalysis ,Steam reforming ,chemistry.chemical_compound ,Coated Catalytic Patterns ,Hydrogen production ,Thin layers ,Methane reformer ,Renewable Energy, Sustainability and the Environment ,Steam Methane Reforming ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,0104 chemical sciences ,Fuel Technology ,chemistry ,Chemical engineering ,Chemical Kinetics ,Catalytic Combustion ,CFD ,0210 nano-technology - Abstract
In this study a numerical analysis of hydrogen production via an autothermal reforming reactor is presented. The endothermic reaction of steam methane reforming and the exothermic combustion of methane were activated with patterned Ni/Al2O3 catalytic layer and patterned Pt/Al2O3 catalytic layer, respectively. Aiming to achieve a more compacted process, a novel design of a reactor was proposed in which the reforming and the combustion catalysts were modeled as patterned thin layers. This configuration is analyzed and compared with two configurations. In the first configuration, the catalysts are modeled as continuous thin layers in parallel, while, in the second configuration the catalysts are modeled as continuous thin layers in series (conventional catalytic autothermal reactor). The results show that the pattern of the catalyst layers improves slightly the hydrogen yield, i.e. 3.6%. Furthermore, for the same concentration of hydrogen produced, the activated zone length can be decreased by 38% and 15% compared to the conventional catalytic autothermal reforming and the configuration where the catalysts are fitted in parallel, respectively. Besides, the oxygen consumption is lowered by 5%. The decrement of the catalyst amount and the oxygen feedstock in the novel studied design lead to lower costs and compact process. © 2021 Hydrogen Energy Publications LLC
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- 2021
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46. Increased Rates of Coronary Artery Calcium Score in Patients with Non - Functioning Adrenal Incidentaloma
- Author
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Fatih Yalçin, Eren Gurkan, Oğuz Akkuş, Fatma Öztürk, Fatih Şen, Gamze Akkus, Onur Kaypakli, and Özkan Bekler
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Adult ,Male ,medicine.medical_specialty ,Turkey ,Endocrinology, Diabetes and Metabolism ,Adrenal Gland Neoplasms ,Renal function ,Coronary Artery Disease ,Coronary Angiography ,Chest pain ,Risk Assessment ,Severity of Illness Index ,chemistry.chemical_compound ,Risk Factors ,Internal medicine ,medicine ,Humans ,Immunology and Allergy ,Treadmill ,Vascular Calcification ,Aged ,Ejection fraction ,business.industry ,Cholesterol ,Middle Aged ,medicine.disease ,chemistry ,Case-Control Studies ,Cardiology ,Female ,medicine.symptom ,Agatston score ,business ,Calcification ,Lipoprotein - Abstract
Aim: We evaluated cardiovascular (CV) risk stratification for nonfunctioning adrenal incidentalomas (NFAIs) via the coronary-artery-calcium (CAC) score. Materials and Method: The participants were patients with NFAI (n = 55). They were compared to patients with chest pain, a low-intermediate Framingham-risk score, and a non-diagnostic treadmill- exercise test, which served as the control group (n = 49). Subsequently, the NFAI group was subdivided according to a CAC score of Results: Similar rates of traditional risk factors were observed between the NFAI and control groups, and lower low-density lipoprotein cholesterol rates were observed in the NFAI group. The CAC score was significantly higher for the NFAI group than the control group. Glucose, potassium, adrenocorticotropic-hormone, and basal-cortisol levels were higher in those with a CAC score of ≥100. High-density-lipoprotein cholesterol estimated glomerular filtration rate and ejection fraction (EF) were higher in those with a CAC score of Discussion: Patients with a low-intermediate CV risk profile and NFAI have a higher risk of atherosclerosis when compared to patients with a low-intermediate CV risk profile, but no NFAI. Conclusion: In patients with NFAI, CAC score evaluation may be used to predict increased atherosclerosis, especially in patients of an older age with higher glucose and decreased EF.
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- 2021
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47. Age and implication of Late Ediacaran dykes in the İstanbul-Zonguldak Tectonic Unit (NW Turkey): Implications for the rifting of the Rheic Ocean
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Fatih Şen
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Tectonics ,Paleontology ,Rift ,Carboniferous ,Ordovician ,Geology ,Far East ,Unit (housing) - Abstract
The Istanbul-Zonguldak Tectonic Unit is a part of Avalonia-Carolina and represents Far East Avalonia. It includes Ordovician to Carboniferous deposits which unconformably overlie Late Neoproterozoi...
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- 2021
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48. Reuse of glass waste in the manufacture of ceramic tableware glazes
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Fatih Şen, Hakan Burhan, Fatma Gol, Selin Simsek, Zeynep Gizem Saritas, Muhammed Bekmezci, Ali Yilmaz, Cigdem Ture, Melek Arslan, and Emre Kacar
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010302 applied physics ,Materials science ,Absorption of water ,Process Chemistry and Technology ,Metallurgy ,Glaze ,02 engineering and technology ,Reuse ,Ceramic ,021001 nanoscience & nanotechnology ,01 natural sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,visual_art ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,visual_art.visual_art_medium ,Waste Glass ,Recycle ,0210 nano-technology ,Ceramic industry ,Frit - Abstract
Today, various studies are carried out to spread the understanding of sustainability. The sustainability of production processes gains importance in corporate areas. In this study, the use of glass waste instead of frit used in glaze compositions in the ceramic industry was evaluated. The chemical and physical properties of glass wastes on samples were examined. The glaze formulations were prepared using 3%, 5%, and 8% by weight of glass waste instead of frit. Glass wastes were added to glaze compositions and 12 different glaze formulation studies were carried out. Transparent, Opaque, and Matte test glazes were prepared with glass waste added glaze formulations, and these glazes were applied to ceramic bodies. SEM (scanning electron microscope) analysis of standard glaze and glass waste added glazes was performed to determine the microstructural and morphological characterizations. Also, surface whiteness, brightness, L*a*b values, glaze flows, harcort test results, and final water absorption values were compared. As a result of the studies, it has been determined that it is appropriate to use 3% glass waste by weight instead of the frit in the production of ceramic tableware. © 2021 Elsevier Ltd and Techna Group S.r.l.
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- 2021
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49. U–Pb zircon geochronology and geochemistry of mafic and intermediate dykes in the İstanbul–Zonguldak Tectonic Unit (NW Turkey): evidence for Devonian and Carboniferous magmatism and the north-subducting Rheic Ocean in Far East Avalonia
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Fatih Şen
- Subjects
010504 meteorology & atmospheric sciences ,Geochemistry ,Orogeny ,010502 geochemistry & geophysics ,01 natural sciences ,Devonian ,Basaltic andesite ,Back-arc basin ,Carboniferous ,Magmatism ,General Earth and Planetary Sciences ,Late Devonian extinction ,Geology ,0105 earth and related environmental sciences ,Terrane - Abstract
The Istanbul–Zonguldak Tectonic Unit, which is devoid of Devonian–Carboniferous magmatism, is a continental fragment of Far East Avalonia. It was deformed by thrusting due to the collision with the Sakarya terrane with Minoa origin during the Carboniferous, and forms the Variscan foreland. The tectono-magmatic evolution of Devonian–Carboniferous, thus consumption evolution of the Rheic Ocean in Far East Avalonia, is poorly known. Diabase and basaltic andesite dykes show Late Devonian to Late Carboniferous igneous crystallization ages in the Istanbul–Zonguldak Tectonic Unit (NW Turkey). They have aphanitic to vitrophyric textures. U–Pb dating on igneous zircons from diabase and basaltic andesite dykes yielded Late Devonian age of ca. 381.3 ± 1.8 Ma (2σ) and Late Carboniferous ages of ca. 306.1 ± 3.3 to 301.5 ± 1.1 Ma (2σ), respectively. Geochemically, Late Devonian magmatism shows tholeiitic affinities and contains subduction and with-in plate components, but Late Carboniferous magmatism displays calc–alkaline signatures and includes subduction components. The Late Devonian dykes intruded into the continental block during the rifting of the Pripyat–Dnieper–Donets Basin in Baltica as a result of the north-subducting Rheic Ocean. While it proceeded to subduct under Far East Avalonia along the magmatic arc that was similar to the Hanseatic arc in East Avalonia, Late Carboniferous dykes emplaced into it in an arc-related setting. Also, Late Carboniferous magmatism that is related to magmatic arc displays that the collision of the Istanbul–Zonguldak Tectonic Unit and Sakarya terrane, described as the Variscan orogeny in the Pontides did not form during the Carboniferous.
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- 2021
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50. The Role of Graphene and BiodentineTM on Proliferation and Odontoblastic Differentiation of Pulp Stem Cells
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Ufuk Okkay, Fatih Şengül, Periş Çelikel, and Sera Şimşek Derelioğlu
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cell proliferation ,graphene ,oxidative stress ,odontogenic differentiation ,tricalcium silicate ,Dentistry ,RK1-715 - Abstract
Objective: The need for new biomaterials with biocompatibility, mechanical, and antimicrobial properties continues in regenerative endodontic clinical applications in dentistry. Biodentine™ is successfully used in vital pulp therapies and has regenerative effects. Additionally, graphene, which possesses good physicochemical, mechanical, and biological properties, promotes cellular biomineralization and osteogenic differentiation in dentistry, along with its neuroregenerative effect. This study aims to investigate the effects of graphene and Biodentine™ on cell proliferation, oxidative stress, and odontogenic differentiation in human dental pulp stem cells (hDPSCs).Methods: Cryopreserved hDPSCs purchased from American Type Culture Collection (ATCC) were used in our study (Cat No: PT-5025). hDPSCs were seeded into the E-plate wells and subsequently four different doses of graphene (12.5, 25, 50 and 100 µg/ml) and Biodentine™ (2, 4, 8 and 16 µg/ml) were added. Results of MTT, total antioxidant capacity (TAC), total oxidant status (TOS) and alkaline phosphatase (ALP) tests were obtained at the end of the 24th hr. 96 hr-real time cell index data were collected with xCELLigence® system. Resulting data were compared using one-way analysis of variance (ANOVA). Results: 12.5 µg/ml graphene and 2 µg/ml Biodentine™ were found to be the subgroups with the highest levels of cell proliferation and the lowest oxidative stress. Antioxidative effect was determined in all Biodentine™ doses but only in 12.5 µg/ml graphene. Odontogenic differentiation was observed in all doses of graphene and Biodentine™. Conclusion: 12.5 µg/ml graphene and 2 µg/ml Biodentine™ were observed to have positive impacts on the proliferation, oxidative stress and odontogenic differentiations of hDPSCs. Keywords: Cell proliferation. Graphene. Oxidative stress. Odontogenic differentiation. Tricalcium silicate
- Published
- 2024
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