Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(82)
- Akkurt, Nevzat(67)
- Güler, Ömer(66)
- Baskonus, Haci Mehmet(62)
- Bulut, Hasan(60)
- Tekin, H.O.(52)
- ALMisned, Ghada(49)
- Yucesan, Melih(43)
- Yildirim, Numan(42)
- Yildirim, Nuran Cikcikoglu(38)
- Paksoy, Mehmet Yavuz(36)
- Serdar, Osman(36)
- Zengin, Gokhan(36)
- Ince, Muharrem(34)
- Celik, Erkan(33)
- Benzer, Fulya(32)
- Kocabaş, Mehmet(30)
- Sulaiman, Tukur Abdulkadir(30)
- Tanyol, Mehtap(29)
- Yildirim, Ozal(28)
- Aslan, Naim(26)
- Kök, Mediha(26)
- Özkul, İskender(26)
- Ates, Mehmet(25)
- Danabas, Durali(25)
- Kutluyer, Filiz(25)
- Can, Erkan(24)
- Kutlu, Banu(23)
- Onat, Onur(23)
- Demir, Veysel(22)
- Erten, Fusun(22)
- Guler, Omer(22)
- Say, Yakup(22)
- Güler, Seval Hale(21)
- Yaman, Mehmet(21)
- Baykal, Duygu Sen(20)
- Sançar, Taylan(20)
- Susam, Selim Orhun(20)
- Cakilcioglu, Ugur(19)
- Orhan, Cemal(19)
Yayınlar
- MakaleAçık Erişim2017Scopus SJRQ2The ability of Phanerochaete chrysosporium (ME446) on chemical oxygen demand remediation in submerged culture medium supplemented with malathion insecticide
Erguven, Gokhan Onder; Yildirim, Numan; Adar, Elanur
This present study aims to evaluating the efficiency of P. chrysosporium (P.c) to degrade the different concentrations of malathion (MLT) (50, 100 and 150 ppm) under agitated (130 rpm) submerged culture conditions via reduction of chemical oxygen demand (COD). We have previously screening the growth of fungus in sabouraud dextrose agar (SDA) medium for 6 days. We have also determined the laccase activity during degradation process for 15 days. According to our results the fungus has achieved 99.6, 98.8 and 98.7 % COD reduction at concentration of 50, 100 and 150 ppm respectively the end of the 15 days. The highest laccase activity (180 ± 5.69 U/L) was measured at concentration of 50 ppm the end of the 15 days and the lowest activity (36 ± 3.26) was determined at concentration of 150 ppm the end of the 15 days. The dried biomass of fungus was weighted at end of the 15 days and we have determined that malathion in culture medium reduced the biomass production compared the control group (SDB + P.c). Our results showed that, P. chrysosporium could be an effective bioremediation tool for treatment of malathion containing wastewater.
AtıfScopus11WoS11OpenAlex13
İncele - MakaleYalnız künye2017Scopus SJRQ3Characterization of antioxidant activity, vitamins, and elemental composition of ciris (Asphodelus aestivus L.) from Tunceli, Turkey
Unal, Ilkay; Kaplan Ince, Olcay
Ciris (Asphodelus aestivus L.), which has been used for a wide range of medicinal purposes and is indigenous in Tunceli, Turkey, was collected from the eastern and western parts of the city. The goal of this study was to determine the vitamins, essential elements, and antioxidant activity of this natural product. The 2,2-diphenyl-1-picrylhydrazyl-hydrate radical scavenging activity, metal chelating activity, reducing power, total phenolics, and Vitamin A, Vitamin C, sodium, potassium, phosphorus, magnesium, calcium, copper, manganese, and zinc concentrations were determined in ciris extracts. The concentrations of Vitamin A, Vitamin C, and Mn of ciris from west Tunceli were higher than samples from the east.
AtıfScopus7WoS7OpenAlex8İncele - MakaleYalnız künye2017Scopus SJRQ1Ohmic heating assisted vacuum evaporation of pomegranate juice: Electrical conductivity changes
Icier, Filiz; Yildiz, Hasan; Sabanci, Serdal; Cevik, Mutlu; Cokgezme, Omer Faruk
A novel electrical heating method, named as ohmic heating, was successfully integrated to vacuum evaporation system, and pomegranate juice was concentrated until its total soluble dry matter content reached to 40% by applying three different voltage gradients (7.5, 10, and 12.5 V/cm) at 180 mm Hg absolute pressure in this system. Total evaporation times were determined as 152, 78, and 53 min at the voltage gradients of 7.5, 10, and 12.5 V/cm, respectively. The concentration time of pomegranate juice was shortened about 56% by ohmic heating relative to conventional evaporation. The electrical conductivity values were increased up to reach 25% TSDM for 7.5 V/cm and at 35% TSDM for 10 V/cm, then showed a decreasing pattern. However, it was constant (0.55 ± 0.01 S/m) during evaporation process at 12.5 V/cm. It is recommended that the ohmic heating method could be successfully integrated to vacuum evaporation process to shorten the processing time significantly. Industrial relevance Ohmic heating has been utilized as alternative method for the purpose of heating, pasteurization, cooking etc., and relatively better products can be obtained by ohmic heating. Nowadays, energy efficient systems are needed in concentrated juice production. The integration of ohmic heating to the conventional vacuum systems could serve the production high quality juice concentrates with efficient use of energy. In present study, ohmic heating assisted vacuum evaporation of pomegranate juice was conducted, successfully. This method decreased the total process time for juice concentration, which is critically important for industrial scale productions. This novel method can be implemented to the fruit juice production lines by taking into account of design characteristics of ohmic systems such as electrical conductivity changes depending on both temperature and total soluble solids concentration. The effects of main process parameter, named as voltage gradient, on electrical conductivity changes during electrical heating assisted evaporation process has been also reported in the present study.
AtıfScopus93OpenAlex97İncele - MakaleAçık Erişim2017Scopus SJRQ3Fault location determination for transmission lines with different series-compensation levels using transient frequencies
Akmaz, Duzgun; Mamiş, Mehmet Salih; Arkan, Muslum; Tagluk, Mehmet Emin
In this paper, based on the theory of traveling waves, the fault distances on long transmission lines with various series-compensation levels are determined using transient current and voltage frequencies. Transmission lines with series compensation are modeled using Alternative Transients Program software with frequency-dependent effects on the line included in the simulation. The transient current and voltage signals are obtained from the model. A fast Fourier transform is used for frequency-domain conversion and fault location is estimated from the frequencies of fault-generated harmonics in the transient spectrum. The algorithm is implemented in MATLAB. To investigate the effect of compensation on accuracy, the results are obtained for different series-compensation levels. The undesirable source-inductance effect is removed and estimation accuracy is further improved using a waveform-relaxation method. The method is found to be successful in determining fault location on series-compensated transmission lines. The effects of the compensation level, fault resistance, and phase angle are investigated.
AtıfScopus6WoS6OpenAlex7İncele - MakaleAçık Erişim2017Scopus SJRQ2Rapid malachite green removal from aqueous solution by natural zeolite: Process optimization by response surface methodology
Tanyol, Mehtap
In this study, malachite green removal from aqueous solutions by natural zeolite was investigated. The interaction between zeolite and malachite green was determined by SEM/EDX and FTIR. The parameters like adsorbent dosage (0.1–1 mg/100 mL), initial malachite green concentration (40–200 mg/L) and the contact time (10–600 s) were optimized using the central composite design of response surface methodology. Maximum removal yield (99.70%) was obtained at an adsorbent dosage of 0.68 mg/100 mL, an initial malachite green concentration of 79.02 mg/L, and at 414 s contact time. The equilibrium process complied better with the Langmuir isotherm model, which exhibits a single layer adsorption, when compared with the Freundlich isotherm model. Adsorption kinetics followed the pseudo-second-order type kinetic and intra-particle diffusion played an important role onto adsorption mechanism of malachite green. The findings of this study demonstrated that zeolite which is found abundant on earth as a cheap and efficient adsorbent could be used for rapid malachite green adsorption from aqueous solutions.
AtıfScopus12WoS11OpenAlex13İncele - MakaleAçık Erişim2017Scopus SJRQ2A hybrid risk-based approach for maritime applications: The case of ballast tank maintenance
Gul, Muhammet; Celik, Erkan; Akyuz, Emre
Risk assessment is vital for cost-effective ship management in maritime industry since numerous maritime activities pose potential hazards according to the human causalities. Therefore, safety practitioners attempt to offer proactive approaches to mitigate risk as much as possible. In this context, this article presents a hybrid risk-based approach for maritime industry by adopting Fuzzy Analytic Hierarchy Process (FAHP) with fuzzy VIKOR (FVIKOR) methods under Fine-Kinney approach. To illustrate the hybrid risk-based approach, ballast tank maintenance process is handled since there are various hazards causing fatalities, severe injuries, and illness during ballast tank maintenance procedure than any other type of shipboard work. An extensive risk analysis is performed to enhance environment safety and operational reliability in maritime industry. Besides its theoretical contribution, the outcomes of the paper contribute to improve overall safety level of ship by considering potential hazards in risk management.
AtıfScopus73WoS66OpenAlex71İncele - MakaleYalnız künye2017Scopus SJRQ2Phase-ambiguity-free and accurate permittivity determination from waveguide measurements
Hasar, U.C.; Buldu, G.
A microwave method has been proposed for accurate and unique extraction of relative complex permittivity (ϵr) of dielectric materials from 2π phase-ambiguity-free amplitude-only two-port and one-port scattering parameter measurements. Improved accuracy has been shown by the applied uncertainty analysis. For the validation of our method, ϵr of low-loss and lossy samples was extracted.
AtıfScopus2WoS2OpenAlex2
İncele - MakaleYalnız künye2017Scopus SJRQ2Conformal, concircular, quasi-conformal and conharmonic flatness on normal complex contact metric manifolds
Vanli, Aysel Turgut; Unal, Inan
Conformal, concircular, quasi-conformal and conharmonic curvature tensors play an important role in Riemannian geometry. In this paper, we study on normal complex contact metric manifolds under flatness conditions of these tensors.
AtıfScopus12WoS13OpenAlex19İncele - BildiriAçık Erişim2017Smart Home Assistant for Ambient Assisted Living of Elderly People with Dementia
Demir, Eren; Köseoǧlu, Erdem; Sokullu, Radosveta; Şeker, Burhan; Shakshuki, E.
It is the nature of life that with advancing age human brain cells are damaged and brain functions degrade, which is manifested by memory loss, lack of concentration, reduced judgement abilities as well as speaking problems and even noticeable changes in personality and behavior. When a number of these symptoms collectively detected in a person, he usually diagnosed with dementia. These people have problems in managing their daily activities and shortly become unable to live by themselves. Ways to prolong the independent life of elderly people have drawn the attention of a large scientific community. In this paper, we present an integrated system design that allows collection, recording and transmission through a cloud application of the data from different sensors placed in a house of a person having dementia. The concept of this work is a part of the so-called Internet of Things (IoT) where information from smart things around us can be evaluated and transmitted over the internet. Peer-review under responsibility of the Conference Program Chairs.
AtıfScopus50WoS32OpenAlex59İncele - Derleme MakaleAçık Erişim2017Scopus SJRQ3Regulation of signal transduction cascades by Pterostilbenes in different cancers: Is it a death knell for oncogenic pathways
Butt, Ghazala; Attar, Rukset; Tabassum, Sobia; Aras, Aliye; Qadir, Muhammad Imran; Ozbey, Ulku; Alaaeddine, Nada; Ozcelik, Beraat; Farooqi, Ammad Ahmad
Interdisciplinary research has revolutionized the field of medicine and we have witnessed exponential increase in the high-impact research in past few decades. However, the road to this burgeoning research field is obstacle-ridden because of intratumor heterogeneity, loss of apoptosis and dysregulation of spatio-temporally controlled signaling pathways. Ground-breaking findings obtained through genetic, genomic and proteomic studies have considerably improved our concepts related to the complexity of protein network and excitingly, discovery of miRNAs has added another layer of intricacy to quantitatively regulated gene networks. In this review, we chronicle the milestone achievements and discuss how Pterostilbenes effectively regulated different cellular pathways. We have provided detailed mechanistic insights related to regulation of JAK-STAT signaling, Notch pathway, Wnt mediated intracellular signaling by pterostilbene. Underlying mechanisms about regulation of PI3K/AKT and MAPK pathways by pterostilbene in different cancers. Regulation of Metastasis-associated protein 1 (MTA1) proteins and Human telomerase reverse transcriptase (hTERT) in cancer cells by pterostilbene. Pterostilbene has also been reported to modulate the expression of various oncogenic and tumor suppressor microRNAs in cancer cells. Better and sharper comprehension of the concepts associated with the modes of action of pterostilbene in different cancers will be useful in identification of cancers which can be efficiently targeted by pterostilbene.
AtıfScopus15İncele - MakaleAçık Erişim2017Scopus SJRQ2Adsorption of hazardous crystal violet dye by almond shells and determination of optimum process conditions by taguchi method
Goksu, Ali; Tanaydin, Mehmet Kayra
Almond shells are classified as an agricultural waste of the food industry. In this study, almond shells were prepared as efficient adsorbents for removing Crystal Violet (CV) dye. The effects of adsorbent dosage, pH, initial concentration, shaking speed, temperature and particle size were studied. The Taguchi L25 experimental design method was used to obtain the optimum experimental condition. The data were analyzed using the signal to noise (S/N) ratio and analysis of variance (ANOVA) for removal of CV from aqueous solutions. The isotherm data were obtained from the experiments performed. The obtained isotherm data were analyzed via the Langmuir, Freundlich and Temkin isotherm models of which the Langmuir isotherm model fitted the best. Thermodynamic parameters such as ΔH°, ΔS° and ΔG° were calculated and the results were 18.5 kJ/mol, 0.057 kJ/mol K and –1.514 kJ/mol at 25°C, respectively. The results of this study indicate that almond shells are efficient adsorbents for removing Crystal Violet (CV) from aqueous solutions. The maximum adsorption capacity was found to be 1.075 mg/g on the almond shells. Adsorption kinetics studies showed that adsorption data can be modeled by a pseudo-second-order model. The optimum conditions for the adsorption on almond shells were found to be: adsorbent dosage = 0.5 g, concentration = 4 ppm, pH = 6, shaking speed = 200 rpm and shaking time = 180 min.
AtıfScopus27WoS23OpenAlex25İncele - MakaleAçık Erişim2017Scopus SJRQ2Investigation of various travelling wave solutions to the extended (2+1)-dimensional quantum ZK equation
Baskonus, Haci Mehmet; Bulut, Hasan; Sulaiman, Tukur Abdulkadir
In this paper, with the aid of the Wolfram Mathematica 9 program, we obtain some novel complex hyperbolic function solutions to the extended (2+1)-dimensional quantum Zakharov-Kuznetsov equation by using the sine-Gordon expansion method. We find some complex and hyperbolic function solutions. Subsequently, we plot 2D surfaces representing the obtained solutions by considering some suitable values of the parameters. At the end of this paper, we compare our results with the existing results in the literature by presenting comprehensive conclusions.
AtıfScopus38WoS36OpenAlex50İncele - MakaleYalnız künye2016Scopus SJRQ1Determination of the effect of lead mine waste aggregate on some concrete properties and radiation shielding
Çullu, Mustafa; Ertas, Haydar
The aim of this study is to determine the radiation absorption capacity of concretes produced from lead mine waste which cannot be processed economically as the lead content is low in the mines they are extracted. Lead mine waste (tallow) were exchanged at ratios of 25%, 50% and 75% respectively with barite and limestone aggregates and samples were prepared at C16, C25 and 05 classes. The compressive strength and the unit weight of the prepared samples were determined. The linear absorption coefficients of prepared concrete samples at 662 keV of energy were determined. In addition the relationship between the radiation absorption capacity and the compressive strength-unit weight was investigated. The experiments demonstrated that best absorption was in concrete samples with 100% barite content (100B). On the other hand in the concrete samples prepared from the mixture of limestone and lead mine waste aggregates, it was observed that radiation absorption capacity decreased due to decreasing amount of barite. In concrete samples prepared from the mixture of lead mine waste and limestone aggregates, it was observed that radiation absorption capacity increased due to increasing amount of mine waste aggregates in the concrete. As a result it was observed that lead mine waste aggregates do not absorb as much radiation as barite aggregates depending on the ratio increase of lead mine waste in the aggregate added to the concrete mixture. However the absorbed radiation amount was observed to be higher compared to limestone aggregates. (C) 2016 Elsevier Ltd. All rights reserved.
AtıfWoS70OpenAlex71İncele - MakaleAçık Erişim2016Scopus SJRQ3Spectroscopic, Thermal and Antioxidant Properties of Novel Mixed Ligand-Metal Complexes Obtained from Saccharinate Complexes and Azo Dye Ligand (mnppa)
Turan, Nevin; Adigüzel, Ragip; Buldurun, Kenan; Bursal, Ercan
The novel mixed ligand-metal complexes with a general formula [M(Sac)(2)(H2O)(2)L-2]center dot nH(2)O) [M = Mn(II), Co(II), Ni(II), Cu(II) and Cd(II), L=5-Methly-4-(4-nitrophenylazo)-2H-pyrazole-3-ylamine (mnppa)] have been synthesized and characterized by elemental analyses, IR, UV-VIS, magnetic susceptibility mass spectra and thermogravimetry-differential thermal analysis (TGA-DTA). Each metal (II) ion is octahedral coordinated by two sac, two mnppa and two aqua ligands. The antioxidant properties of mixed ligand-metal complexes were determined by different in vitro methods such as ABTS, DPPH, FRAP and CUPRAC assays. The results of metal complexes were compared with standard antioxidant compounds.
AtıfWoS30OpenAlex30İncele - MakaleAçık Erişim2016Scopus SJRQ3INFLUENCE OF STOCK DENSITY ON DIGESTIVE ENZYME ACTIVITY (TRYPSIN), HEAT SHOCK PROTEIN 70 (HSP70), AND OXIDATIVE STRESS BIOMARKERS OF NARROW CLAWED CRAYFISH, ASTACUS LEPTODACTYLUS ESCHSCHOLTZ, 1823 (DECAPODA, ASTACIDAE)
Aksu, O.; Kutluyer, F.; Can, E.; Erisir, M.; Benzer, F.
Stocking density causes changes in behaviour and physiology of aquatic animals and high density can cause oxidative damage in living cells. Therefore, experiments were designed to investigate the effects of stocking density on the oxidant-antioxidant response (glutathione (GSH), glutathione peroxidase (GSH-Px), catalase (CAT), and malondialdehyde (MDA)), digestive enzyme activity (trypsin), and heat shock protein 70 (HSP70) of narrow clawed crayfish (Astacus leptodactylus). The experiment was conducted to assess effects by stocking 3, 6, 9 and 12 crayfish/m(2). Crayfish were stocked into 12 fiberglass tanks, three replicates per treatment and fed for 45 days. Our results indicated that activity of GSH-Px, MDA, and GSH levels increased in hepatopancreas (p<0.05) and muscle tissues (p<0.05) with increasing stock concentration while CAT activity decreased (p<0.05). Trypsin and HSP70 insignificantly increased in haemolymph. In conclusion, oxidative stress biomarkers were negatively influenced by increased quantitative changes in stocking density.
AtıfWoS6OpenAlex8İncele - MakaleYalnız künye2016Scopus SJRQ1Pulsed electric fields on phenylalanine ammonia lyase activity of tomato cell culture
Gürsul, Isil; Gueven, Alper; Grohmann, Anne; Knorr, Dietrich
Pulsed electric field (PEF), among numerous stresses, provides a large potential as an external stimulus to enhance secondary metabolite biosynthesis from plant cell cultures. PEF treatment was combined with the sub-culturing technique to increase phenylalanine ammonia lyase (PAL) activity, the key enzyme for secondary metabolite synthesis from tomato cell culture. In reference to the analysis, maximum accumulation of total phenolic (TP) compounds in the cells was determined as a function of stress reaction time (SRT). Also, PEF application increased PAL activity. PEF resulted in an increase in the porosity of the cell membrane, thus decreasing cell vitality. On the other hand, SRT decreased vitality, while increasing TP content. Sub-culturing enhanced the cell structure and improved the cell membrane permeability. PEF treatment potentially offers an alternative to other methods for increasing PAL activity in plant cell cultures. (C) 2016 Elsevier Ltd. All rights reserved.
AtıfWoS20OpenAlex27İncele - MakaleYalnız künye2016Scopus SJRQ1New acoustic wave behaviors to the Davey-Stewartson equation with power-law nonlinearity arising in fluid dynamics
Baskonus, Haci Mehmet
This manuscript investigates the new acoustic wave behaviors of the Davey-Stewartson equation with power-law nonlinearity with the help of sine-Gordon expansion method. This technique yields many new acoustic wave behaviors such as hyperbolic, exponential and complex function structures to the problem considered. Wolfram Mathematica 9 has been used throughout the paper for mathematical calculations along with obtaining two-and three-dimensional surfaces of results.
AtıfWoS142OpenAlex156İncele - MakaleYalnız künye2016Scopus SJRQ3Combined effects of physicochemical variables (pH and salinity) on sperm motility: characterization of sperm motility in European sea bass Dicentrarchus labrax
Ögretmen, F.; Inanan, B. E.; Kutluyer, F.
Gamete activation in fish is an important step in terms of artificial fertilization of oocytes, cryopreservation studies and other experimental manipulations. Salinity and pH differences in activation media affect to sperm motility and fertilizing ability. These experiments were therefore designed to investigate the combined effects of pH (range 5.0-9.0) and salinity (20, 30, 37, and 45 parts per thousand) of activation media on sperm motility of European sea bass Dicentrarchus labrax. The best results were obtained at salinity 37 parts per thousand and a pH of 9.0. Our results also demonstrated that non-progressive motility at salinity 45 parts per thousand was observed in the range of 5.0-9.0 pH. In conclusion, spermatozoa can be motile at a wide range of pH and salinity values although the percent of motile spermatozoa and motility duration are negatively affected by low pH values.
AtıfWoS13OpenAlex17İncele - MakaleYayıncıda açık erişim2016Scopus SJRQ3Determination of Drying Kinetics of Tunceli Garlic with Microwave Drying Technique
Yogurtçu, Hakan
In this study, drying kinetics of 4 mm-thick slices of Tunceli garlic (Allium tuncelianum) was investigated by using microwave technique at an interval of 90-600 W microwave output power. Ten mathematical models were used to represent the experimental data in this study. The determination of coefficient (R-2), root mean square error (RMSE), chi-square (chi(2)) and percentage error (E%) values that show compatibility to these models were determined. The determination of coefficient (R-2) values were found to vary at an interval of 0.9440-0.9993. The Midilli et al model was determined to be the best model that represents the experimental data. It was seen that drying rate increases with the increase in microwave output power (P) and decreases with the increase in sample mass (m). Effective diffusion coefficients (D-eff) and drying rate constants (k) were determined for different sample masses at microwave output power of 90 W. Activation energies for both effective diffusion coefficients and drying rate constants were determined by using an Arrhenius type exponential equation. Activation energies from effective diffusion coefficients and drying rate constants were found as 3.85 W g(-1) and 3.99 W g(-1) respectively.
AtıfWoS2OpenAlex3İncele - MakaleYayıncıda açık erişim2016Scopus SJRQ3Oxidative stress and some biochemical parameters during starvation and refeeding in Astacus leptodactylus (Esch., 1823)
Barim-Oz, O.; Sahin, H.
This study was conducted to determine the effect of starvation (78 days) and refeeding (33 days) on oxidative stress (malondialdehyde (MDA)), antioxidants (superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), glutathione peroxidase (GSH-Px)), arginase (AR) and nitric oxide (NO) in the hepatopancreas, muscle and gills tissues of freshwater crayfish (Astacus leptodactylus). Crayfish were maintained at three experimental groups: control (fed), starved (not fed) crayfish for 78 days and refeeding crayfish for 33 days after 78 days starvation. The biochemical analysis in the tissues were measured at 3, 18, 33, 48, 63 and 78 days of starvation and feeding and at 3, 18 and 33 days of refeeding. In the all periods, the MDA levels were significantly higher in tissues of starved crayfish than the control ones. Significant changes in the MDA levels were also observed amongst starvation times. In the tissues of starved crayfish was significantly higher SOD, CAT, GR and AR activities when compared to control crayfish. The GSH-Px and NO activity showed increases and decreases in different starvation periods according to control group. The parameters measured returned to control values after 33 days of the refeeding. Collectively, the present study indicated that starvation induces MDA, SOD, CAT, GSH-Px, GR, AR and NO activity in the tissues, and A. leptodactylus exposed to starvation can be withstand 78 days.
AtıfWoS8OpenAlex14İncele