Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(19)
- Celik, Erkan(9)
- Topal, Murat(8)
- Yucesan, Melih(8)
- İlhan, Aziz(8)
- Danabas, Durali(7)
- Kaya, Sema Kayapinar(7)
- Mete, Suleyman(7)
- Serin, Faruk(7)
- Arslan Topal, E. Işıl(6)
- Ates, Mehmet(6)
- Ceyhan, Muhammed(6)
- Erguven, Gokhan Onder(6)
- Erisir, Mine(6)
- Kutlu, Banu(6)
- Yildirim, Ozal(6)
- Benzer, Fulya(5)
- Kahraman, Gökhan(5)
- Sabanci, Serdal(5)
- Talo, Muhammed(5)
- Öbek, Erdal(5)
- Akkurt, Nevzat(4)
- Aksu, Onder(4)
- Alataş, Mevlüt(4)
- Altı, Aziz(4)
- Aslaner, Recep(4)
- Bayrakdar, Cihan(4)
- Boydak, Merve(4)
- Caliskan, Abuzer(4)
- Dal, Murat(4)
- Ertit Tastan, Burcu(4)
- Gömleksiz, Mehmet Nuri(4)
- Icier, Filiz(4)
- Ince, Muharrem(4)
- Kandemir, Fatih Mehmet(4)
- Orhan, Ahmet(4)
- Ozer Kaya, Seyma(4)
- Pullu, Emine Kübra(4)
- Serdar, Osman(4)
- Serin, Emine Kaplan(4)
Yayınlar
- MakaleAçık Erişim2020Scopus SJRQ3Effect of surfactant types on particle size and morphology of flame-retardant zinc borate powder
Ipek, Yeliz
Zinc borate is a boron-containing chemical material that is used to increase the flame retardancy of polymeric materials, dyes, cables, fabrics, carpets, and the internal parts of automobiles and planes. Commercially used zinc borate, which has the formula of 2ZnO·3B2O3·7H2O, has a particle size between 10 and 20 μm. However, recent studies have shown that nanosized flame retardants have more superior flame retardancy and less negative effects on mechanical properties than microsized flame retardants. Nanosized flame retardants disperse more homogeneously and even low quantities are sufficient to provide high flame resistance. In this study, nano zinc borate powder was synthesized by a wet chemical method and the effects of nonionic, anionic, and cationic surfactants on the particle size and morphology of the zinc borate particles were investigated. Chemical purity and physical structures of the synthesized zinc borate powder were analyzed by XRD, FTIR, TG-DTA, TEM, and Zetasizer. The analysis results showed that the zinc borate powder had a chemical formula of 2ZnO·3B2O3·7H2O. TEM and Zetasizer results indicated that the nano zinc borate powder, which had nanoscale particle size distribution with needle- and flake-like structures, was synthesized using nonionic, anionic, and cationic surfactants.
AtıfScopus17WoS15OpenAlex18TR Dizin3
İncele - MakaleYalnız künye2020Scopus SJRQ3A fuzzy-based occupational health and safety risk assessment framework and a case study in an international port authority
Gul, Muhammet
Ports are complex systems that play a crucial role in the transportation of maritime-related products and services. Since ports face various safety issues in design, installation, operation and maintenance processes, there are many aspects open for improvement in Occupational Health and Safety risk assessment and it is required to deal with risks, reduce them to an acceptable level and control. To struggle with emerging risks and manage this process better, a risk assessment framework is proposed for ports in this study. A case study is performed in a Turkish international port authority using the proposed framework. Fuzzy Analytic Hierarchy Process (FAHP), which is a commonly used fuzzy multi-criteria decision-making method, was used in weighting two risk factors: likelihood and severity. The orders of priority of hazards were then determined by a fuzzy-based VIKOR method based on the output of FAHP. The proposed framework overcomes some drawbacks, including a lack of assignment on the weight to two risk assessment factors and lack of the high dependence of the prioritisation on the experts’ opinions. To validate the results, a sensitivity analysis was conducted. In conclusion, the study contributes to the applicability of the proposed framework to assess the risks in ports and provides a distinct risk prioritisation.
AtıfScopus43WoS39OpenAlex49İncele - MakaleAçık Erişim2020Scopus SJRQ3An ethnobotanical survey of medicinal plants in ballakayati (Erbil, north Iraq)
Kawarty, Awara Mohammed A.M.A.; Behçet, Lütfi; Çakilcioğlu, Uğur
This study aims to identify wild plants used for medical purposes by local people of the Ballakayati district of Erbil in North Iraq, and to determine the local names and uses of those plants. The study was carried out for approximately 3 years between 2016 and 2018. During this period of time, 85 plant specimens were collected. Demographic characteristics of the participants, names of the local plants, used parts of these plants and their preparation methods were investigated and recorded. In the literature analysis of the plants used in this study, 85 plants were found to be used for medicinal purposes while 3 plants were not found in the literature records. Local plant names differ due to local dialects in North Iraq. Locals benefit from the wild plants growing in their districts. In this area, it was found that locals use 85 plants from 38 families for curative purposes. The medicinal plants were used for the treatment of many diseases, mostly for the treatment of a cold, shortness of breath, and heart and gastrointestinal diseases. It was determined that the plants we identified in this study were used directly or as infusion or decoction. The most considerable medicinal plants were Mentha longifolia (L.) L. subsp. noeana (Briq.) Briq. (UV:0.38), Urtica dioica L. (UV:0.38). Furthermore, plants used for medicinal purposes are dried and stored for using them in winter. The medicinal use of Rhaponticum repens (L.) Hidalgo and Tanacetum polycephalum Sch.Bip. subsp. argyrophyllum (K.Koch) Podlech. that we found in this area were recorded for the first time. Different use of those plants were observed in this study.
AtıfScopus57WoS50TR Dizin7İncele - MakaleAçık Erişim2020Scopus SJRQ2The effect of graphene nanoplatelets on technical properties of micro- and nano-sized TiO2 matrix: a comparative research study on electrical and optical characteristics
Güler, Ömer; Ayhan, Hakan; Başgöz, Öyküm; Yavuz, Çağdaş; Albayrak, M. Gökhan; Evin, Ertan; Safa, Hasan; Yahia, Ibrahim S.
In this study, titanium dioxide (TiO2)-based graphene nanoplatelets (GNPs)-reinforced composite materials were produced and the electrical and optical properties of the composite materials were investigated. Graphene, which was used as a reinforcing material, was produced by using liquid-phase exfoliation method. While the TiO2 used as matrix material was commercially available for the first group of samples, it was produced by using the sol–gel method for the second group of the samples. Different rates of graphene were added to the TiO2 powders which were commercially available and produced by using sol–gel method. GNPs used as a reinforcing material were subjected to TEM analysis. The resulting composite materials were structurally examined in SEM and XRD. Then, the changes in electrical conductivity of these composites under the impact of temperature were measured. UV–Vis spectrometers of the samples were taken and their optical properties were determined. When temperature-based electrical examination of the produced composite materials was performed, an increase was observed on the electrical conductivity values in both groups of samples as a result of addition of the reinforcing element. In addition, TiO2-containing composites produced by using sol–gel method had lower electrical conductivity comparing with commercially purchased TiO2-containing composites especially at high temperatures. In the optical measurements, it was observed that there was an increase in the optical bandgap energy range values with GNPs reinforcement but a decrease in the reflectance values.
AtıfOpenAlex2İncele - MakaleYayıncıda açık erişim2020Scopus SJRQ4Bioremediation of fluazifop-p-butyl herbicide by some soil bacteria isolated from various regions of Turkey in an artificial agricultural field
Erguven, Gokhan Onder; Nuhoglu, Yasar
The bioremediation rate of fluazifop-p-butyl (C19H20F3NO4) was monitored. Bacteria were isolated in agricultural soil samples. Fifteen sterilised glass jars were inoculated with 2, 5, 10, 20 cm3 of a homogenised bacterial mixture (109 CFU/cm3), then sterile agricultural soil and 60 µg of fluazifop-p-butyl (in liquid form) were added to each jar. Each week, filtrated water drained from bottles was analysed for fluazifop-p-butyl concentration, chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and total organic carbon (TOC). Additionally, pH and dissolved oxygen concentration were monitored. The highest biodegradation rate was observed in the soil sample containing 20 cm3 of the culture media. In this media, fluazifop-p-butyl, COD, BOD5 and TOC removals were measured as 91, 83, 96 and 86%, respectively, at the end of the 2 months. The DO level was measured between 3 and 6 mg O2/dm3 in the first month for all cultures. An increase of pH was recorded during the first month and after this time a pH decrease was noted.
AtıfScopus5WoS5OpenAlex4İncele - Kitap BölümüYalnız künye2020Homoploid Hybridization and Its Role in Emergence and Diversity of the Genus Origanum L. (Lamiaceae)
Dirmenci, Tuncay; Arabacı, Turan; Özcan, Taner; Yazıcı, Türker; Martin, Esra; Çelenk, Sevcan; Açar, Mikail; Üzel, Devrim
Hybrid specimens can be occurred as same ploidy level (homoploidy) or not (polyploidy) with its parents. Homoploid hybrids are originated without any change in their ploidy level (2n) and polyploid hybrids are produced with the change in ploidy level (3n, 4n etc.). According to recent studies, the frequency of natural hybridization (homoploid and polyploid) has been estimated to 25% of all flowering plants. Recent studies show that the genus Origanum has homoploid hybrids. Hybridization is a common phenomenon among the species of Origanum in overlapping distribution habitats (natural or cultivated areas). Ietswaart suggested that the hybridization process is a significant factor in the speciation of Origanum, and Origanum is probably caused by the hybridization of the old tribe Saturejeae (now tribe Mentheae) genera. Based on the hypothesis of Ietswaart, we can discuss the emergence of the genus Origanum, its intrageneric speciation and its hybrids having the possibility for speciation via hybridization using morphological and cytological evidence. During the field studies, it was seen that many populations of wide-distributed species were overlapping, and some Origanum putative hybrid specimens were also observed in these overlapping areas with morphological differences from their parents. All studied Origanum species and hybrids have 2n = 30 chromosome numbers to define homoploidy. Palynological characters were revealed, and intermediate pollen structure (size, P/E ratio etc.) was seen in the hybrids between their parents. In addition, DNA extractions were done from all the hybrids and their parents. nrITS DNA was sequenced. Hybrid specimens have some heterozygous DNA loci in comparison to their parents. This study presents some evidence about homoploid the hybridization of the genus Origanum put forward by Ietswaart. If habitat, ecological and geographic isolations occur between the hybrids and their parents, these hybrids can be speciation via homoploid hybridization in the future.
AtıfScopus4İncele - Kitap BölümüYalnız künye2020Ideology of children animation series in Turkey: The case of Rafadan Tayfa
Özsel, Kadriye Töre
Cultural commodities take shape in accordance with the socio-political and ideological framework of the system in which they are produced. The aim of this chapter is to reveal that ideological framework for a Turkish animated series for children. The chapter is based upon ideology-critique perspective and selected series is Rafadan Tayfa. It is broadcasted on the kids channel of national broadcasting company TRT, was the most popular domestic animation series in April 2017. Selected chapters of the series are examined in accordance to Giannetti's methodological approach to identify ideological leanings in movies. It is found that the series has mild conservative leanings and presents a partly imagined "traditional neighborhood lifestyle" as an ideal form that is longed for.
- MakaleAçık Erişim2020Scopus SJRQ3Geochemical, stable (O, c, and b) and radiogenic (sr, nd, pb) isotopic data from the eskişehir-kızılcaören (nw-anatolia) and the malatya-kuluncak (e-central anatolia) f-ree-th deposits, Turkey: Implications for nature of carbonate-hosted mineralization
Çimen, Okay; Corcoran, Loretta; Kuebler, Corinne; Simonetti, Stefanie S.; Simonetti, Antonio
In Turkey, the largest fluorine (F)-rare earth element (REE)-thorium (Th) deposits are located within the Eskişehir-Kızılcaören (north-western Anatolia) and the Malatya-Kuluncak (east-central Anatolia) regions, and these are associated with Oligocene extensional alkaline volcanic and Late Cretecaous-Early Paleocene postcollisional intrusive rocks, respectively. In the Kızılcaören region, the basement units include the Triassic Karakaya Complex and the Late Cretaceous oceanic units (Neotethyan suture) that are cut and overlain by phonolite and carbonatite intrusions and lava flows. In the Kuluncak region, the plutonic rocks are mainly composed of syenite, quartz syenite, and rare monzonite, and these cut the late-Cretaceous Karapınar limestone, which hosts the F-REE-Th mineralization in contact zones. A carbonatite sample from the Kızılcaören region displays both a total rare earth element (TREE) concentration (4795 ppm) and δ11B (–6.83‰) isotope composition consistent with mantle-derived carbonatite; whereas it is characterized by heavier δ13C (+1.43‰) and δ18O (+20.23‰) isotope signatures compared to those for carbonatites worldwide. In contrast, the carbonates which host the F-REE-Th mineralization in the Kuluncak region are characterized by lower TREE concentrations (5.13 to 55.88 ppm), and heavier δ13C (–0.14 to –0.75‰), δ18O (+27.36 to +30.61‰), and δ11B (+5.38 to +6.89‰) isotope ratios compared to mantle-derived carbonatites. Moreover, the combined initial87Sr/86Sr (0.70584 to 0.70759) and143Nd/144Nd (0.512238 to 0.512571) isotope ratios for samples investigated here are distinct and much more radiogenic compared to those for carbonatites worldwide, and therefore indicate significant crustal input and/or hydrothermal metasomatic-related alteration. Overall, stable and radiogenic isotope data suggest that the host carbonate rocks for the F-REE-Th mineralization in both the Kızılcaören and the Kuluncak regions consist of hydrothermally metasomatized carbonatite and limestone, respectively. The mineralization in the Kızılcaören region may potentially be related to carbonatite magmatism, whereas the mineralization in the Kuluncak region, which most likely formed through interactions between the plutonic rocks and surrounding limestone at contact metamorphism zone, involved hydrothermal/magmatic fluids associated with extensive postcollisional magmatism.
AtıfScopus15WoS14OpenAlex18İncele - Kitap BölümüYalnız künye2020Microbial release of exopolymeric substances and their role in removal of pollutants from wastewater
Işıl Arslan Topal, E.; Topal, Murat
Activated sludge samples were seasonally collected from the aeration tanks of the Municipal Wastewater Treatment Plant located in Elazığ city (Turkey). Mixed liquor suspended solids (MLSS), mixed liquor volatile suspended solids (MLVSS), total solids (TS), suspended solids (SS), volatile solids (VS), chemical oxygen demand (COD), and sludge volume index (SVI) of the activated sludge were seasonally monitored in the treatment plant. Exopolymeric substances (EPS) were extracted in the samples collected. The EPS decreased in summer, while the EPS content was the highest in winter. The TB-EPS part of EPS was higher than the LB-EPS part of the EPS in all seasons. The lowest TB-EPS and LB-EPS were determined in summer, while the highest TB-EPS and LB-EPS were determined in winter. The carbohydrate, protein, and humic substance fractions of TB-EPS and LB-EPS followed the order of protein > carbohydrate > humic substance in all seasons. There was a negative correlation between the EPS content and SVI. The relationships between EPS and the removal efficiencies of TS, SS, and VS were quite low, while the relationship between COD removal and EPS was quite high.
AtıfScopus1OpenAlex1İncele - MakaleYalnız künye2020Scopus SJRQ3Investigation of the Effect of Operating Conditions Change on Water Hammer in Hydroelectric Power Plants
Kahraman, Gökhan
Renewable energy sources do not harm the environment, and they contribute greatly to national economies. Hydraulic energy is the leading renewable energy source. Hydraulic energy is used more widely than other renewable energy sources around the world. This situation of hydraulic energy makes it important to solve the faults in hydraulic turbine-generator units. In this study, water hammer impacts have been investigated. This issue is important and can be dangerous in hydroelectric power plants. As a result of the research, the optimum sudden shutdown time of the adjusting wings in the snail is determined by considering the different operating conditions of a hydroelectric power plant. When the turbine-generator units are operated according to the specified instantaneous shutdown time, they will be protected against the impact of the water hammer pressure and the turbine shaft overspeed. Thus, they will be operated with less risk.
AtıfScopus9WoS8OpenAlex8İncele - MakaleYalnız künye2020Scopus SJRQ1In-situ synthesis of 3D printable mono- and Bi-metallic (Cu/Ag) nanoparticles embedded polymeric structures with enhanced electromechanical properties
Aktitiz, İsmail; Varol, Remzi; Akkurt, Nevzat; Saraç, Mehmet Fahri
The interest of additive manufacturing with 3D printing increases day by day, which provides improved mechanical, electrical, magnetic and thermal properties of 3D parts. The production of 3D parts with the stereolithography (SLA) method, which allows it to be produced with high precision, resolution and complex geometries, distinguishes itself from other alternative additive manufacturing methods (FDM. SLS. LOM. LMD etc.). However, studies on the preparation of functional 3D polymer nanocomposites with the SLA method are quite limited. This study aims to produce silver (Ag) and/or copper (Cu) based 3D polymer nanocomposites for enhancing its mechanical strength, thermal stability and electrical conductivity. Mono and bimetallic (Cu/Ag) nanoparticles have been in-situ synthesized by selective irradiation of laser beam method using a commercial SLA device. In this method, metal (Cu/Ag) acrylate containing photocurable resin is not only cured but also leads to thermal decomposition of metal ions into nanoparticles to form functional 3D structures. The mechanical, electrical and thermal properties of polymer nanocomposites are characterized in detail. As a result of the analysis, the nanoparticles, with an average diameter of 25–55 nm, are well dispersed in the polymer matrix without agglomeration. The temperature at which 5% weight loss of Ag and Cu based polymer structures is measured as 179.3 °C while the glass transition temperature is found to be 223.81 °C. Most importantly, the resistance values are significantly decreased from 456.62 GΩ (Gigaohm) to 1.50 GΩ by increasing the amount of Ag addition at 3D polymeric structures. Therefore, this study allows the production of polymer nanocomposites not only in complex structures but also in desired properties especially for electrically conductive materials, capacitors and electronic applications.
AtıfScopus32WoS24OpenAlex33İncele - MakaleYalnız künye2020Scopus SJRQ1Evaluating occupational health and safety service quality by SERVQUAL: a field survey study
Demir, Pelin; Gul, Muhammet; Guneri, Ali Fuat
The adverse impact of occupational accidents and occupational diseases on the society have recently increased a lot since the industrial-oriented society is getting more and more widespread. Although attempts regarding occupational health and safety (OHS) increase in Turkey, they are still at an inadequate level. OHS experts prepare employees for a healthy and safer working environment, so that work accidents can be eliminated and employees can be healthy psychologically and physically. At the same time, the worksites can be prevented from being financially damaged and productivity can be improved. The aim of this study is to measure OHS service quality by the evaluations of OHS experts from various sectors and workplaces. In this way, the OHS performance is measured, the difference between perceptions and expectations of the OHS experts is determined and deficiencies are revealed. In the study, the OHS activities are examined in five dimensions using the SERVQUAL scale; tangibility, reliability, responsiveness, assurance and empathy. The questionnaire is carried out using a Likert-type five-point scale among 81 OHS experts from different sectors. In conclusion, SERVQUAL analysis is introduced as a useful tool for employers to better understand what they need to know about OHS services.
AtıfScopus20WoS15OpenAlex26İncele - MakaleYalnız künye2020Scopus SJRQ3A study of endohelminthes in some fish species caught between Kumlutarla-Gemici regions of Karakaya Dam Lake
Gun, A.; Dorucu, M.
AtıfScopus2WoS2İncele