Munzur ÜniversitesiMunzur ÜniversitesiAçık Erişim Arşivi · RDL Open

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  • Kitap BölümüYalnız künye2024
    Adaptive AI and Interactive Narrative Possibilities in Media

    Deniz, Kemal

    This chapter examines the influence of advancements in adaptive artificial intelligence (AI) on interactive narrative solutions in both current media and emerging communication environments that are expected to gain significance in the future. This study explores the potential benefits of integrating narratives and adaptive AI into a communication process that involves human-machine interaction. The objective of this chapter is to focus on interactive and autonomous narration to understand the capabilities of new narrative structures that can incorporate AI technology across many media platforms, ranging from television to the metaverse.

    Scopusİncele
  • MakaleYalnız künye2024Scopus SJRQ2
    Exploring critical behavioral differences in physical, structural, and nuclear radiation attenuation properties of produced High Entropy Alloy (HEA) and Refractory-High Entropy Alloy (RHEA) samples

    Güler, Seval Hale; Güler, Ömer; Kavaz, E.; Almisned, Ghada; Issa, Bashar; Tekin, H.O.

    Refractory-High entropy alloys (RHEAs) are known for their exceptional mechanical and radiation-resistant properties, making them promising materials for use in nuclear reactors. Their high entropy composition, which consists of multiple elements in roughly equal proportions, can create a stable microstructure that withstands high levels of radiation damage. The objective of this work is to further our comprehension of the unique behavioral, physical, structural, and nuclear radiation attenuation characteristics shown by High-Entropy Alloys (HEA) and Refractory-High entropy alloy (RHEA) materials. Accordingly, two high entropy alloy (HEA) samples through two different compositions were produced. The first composition under consideration is the typical high-entropy alloy (HEA) defined as MnCrFeNiCoMo0.5. The second composition under consideration is a refractory high entropy alloy (RHEA) characterized by the following elemental composition: TiZrNbHfVTa0.1. SEM and EDX analyses were conducted in terms of determining their physical and structural attributes. Next, a133Ba radioisotope together with a HPGe detector were utilized for gamma-ray transmission experiments. Finally, a241Am/Be source and a gas proportional detector were used for neutron absorption experiments for HEA and RHEA samples. The alloy structures displayed a unique degree of uniformity. Throughout the RHEA phase, the incorporation of refractory elements did not provide any discernible adverse impacts on the physical stability. The counting spectrum provided a clear explanation of the gamma ray absorption features shown by the RHEA (R) sample, highlighting its exceptional absorption properties. Regarding the absorption properties of neutrons, it was observed that RHEA had a comparatively reduced amount of absorption. Therefore, it can be concluded that the basic structure of RHEA grants it superior gamma-ray attenuation qualities compared to HEA. It can be concluded that RHEA demonstrates superior applicability as a material in comparison to HEA, especially in situations involving the use of fuel rods, where maintaining of neutron quantity has paramount importance for achieving optimum neutron activation.

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  • MakaleYalnız künye2024Scopus SJRQ2
    Effect of type and concentration of antioxidant on sperm motility, viability, and DNA integrity of climbing perch Anabas testudineus Bloch, 1792 (Pisces: Anabantidae) post-cryopreservation

    Maulida, Siti; Eriani, Kartini; Fadli, Nur; Siti-Azizah, Mohd N.; Kocabas, Filiz K.; Kocabas, Mehmet; Wilkes, Martin; Handayani, Luvi S.; Rahayu, Sri R.; Muchlisin, Zainal A.

    Sperm quality is preserved through the crucial involvement of antioxidants, which play a vital role in minimizing the occurrence of reactive oxygen species (ROS) during the cryopreservation process. The suitability of the type and concentration of antioxidants are species-dependent, and this study is crucial in order to improve the quality of the climbing perch sperm post-cryopreservation. Therefore, this study aimed to determine the best type and concentration of antioxidants for cryopreservation of climbing perch Anabas testudineus sperm. To achieve this, 6 types of antioxidants, namely, ascorbic acid, beta-carotene, glutathione, butylated hydroxytoluene (BHT), myo-inositol, and alpha-tocopherol, with inclusion of a control were tested in 3 replications at three concentration levels of 0 mg/L (control), 20 mg/L, 40 mg/L, and 60 mg/L. Sperm was diluted in a glucose-base extender at a ratio of 1:60 (sperm: glucose base), then 10 % DMSO and 5 % egg yolk was added before cryopreservation for two weeks. The results showed that the type and concentration of antioxidants had a significant effect on the motility and viability of cryopreserved climbing perch sperm (P < 0.05), where the best results for ascorbic acid, beta-carotene, glutathione, myo-inositol, and alpha-tocopherol were obtained at a concentration of 60 mg/L, while BHT was at a concentration of 20 mg/L. The best results for glutathione, myo-inositol, and alpha-tocopherol were significantly different from other treatments, while the best results for ascorbic acid and beta-carotene (60 mg/L) were not significantly different from the 40 mg/L concentration, while the best results for BHT were not significantly different from the control treatments. Therefore, the best concentration of glutathione, myo-inositol, and alpha-tocopherol was 60 mg/L, while for ascorbic acid and beta-carotene it was 40 mg/L, and BHT was not recommended. DNA integrity analysis indicated the absence of fragmentation in all samples, including fresh, control, and treated sperm. Based on practical and economic considerations, myo-inositol at 60 mg/L was recommended for cryopreservation of climbing perch A. testudineus sperm.

    • SDG 2 · Açlığa Son
    AtıfScopus19OpenAlex12
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  • MakaleYalnız künye2024Scopus SJRQ2
    Production of CoCrFeNi(Al/Ti) High-Entropy Alloys by Mechanical Alloying: Optimization of Milling Time and Comparison of Corrosion Susceptibilities

    Say, Yakup; Dikici, Burak; Kaseem, Mosab; Özkul, İskender; Güler, Ömer

    CoCrFeNi alloy is the most well-known four-component equiatomic alloy. In addition, it has a low-cost composition among HEAs. Four-component alloys are considered semi-HEAs. Therefore, a five-component HEA design was made by adding another metal to the main composition of CoCrFeNi. As the fifth metal, two metals such as Al and Ti, which are relatively low in cost and have the potential to improve properties, were chosen. For this purpose, in this study, the effect of Al and Ti on CoCrFeNi main alloy was investigated by producing three different samples as CoCrFeNi, CoCrFeNiAl, and CoCrFeNiTi. The alloys with three different compositions (used three different samples) were successfully produced by the mechanical alloying method. Although Al and Ti have the possibility of intermetallic with other metals in the alloy, such a formation was not observed during mechanical alloying, and it was observed that all metals were homogeneously distributed in the alloy. The microhardness results indicated that CoCrFeNiAl and CoCrFeNiTi samples had similar hardness values. While the hardness of the CoCrFeNi sample was 136 HV, the hardness of the CoCrFeNiAl sample was 262 HV. However, the hardness of the CoCrFeNiTi sample decreased significantly. The hardness of the CoCrFeNiTi sample was measured as 269 HV. It was observed that the addition of Ti and Al to the base alloy was increased a significant change in hardness. It has been observed that Ti supplementation has a more positive effect on improving corrosion properties. It is seen that the corrosion potentials shift toward more negative potentials with the addition of Al and Ti to the CoCrFeNi (−194 mV) alloy (−306 and −224 mV for CoCrFeNiAl and CoCrFeNiTi, respectively). When the surface morphologies of the alloys are compared after corrosion; the damage to the alloy surfaces increases due to the negative Ecorr value in CoCrFeNiAl and CoCrFeNiTi alloys compared to the master alloy. However, the high corrosion current density (12.69 µA/cm2) in the CoCrFeNiTi sample caused much more damage to this alloy. Graphical Abstract: (Figure presented.)

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  • MakaleYalnız künye2024Scopus SJRQ2
    The relationship between parental attitude toward childhood epilepsy and spiritual orientation

    Kasimoğlu, Necla; Gürarslan Baş, Nazan

    Aim: The aim of this study is to evaluate the relationship between parental attitudes toward childhood epilepsy and spiritual orientations. Methods: This descriptive study was conducted online between May and July 2022 with 417 parents residing in the eastern part of Turkey. Data were collected using a descriptive information form, the Social Attitudes Scale toward Childhood Epilepsies, and the Spiritual Orientation Scale. The obtained data were analyzed using the SPSS software package, employing descriptive statistics such as frequency, percentage, mean, standard deviation, as well as inferential statistics including independent samples t-test, ANOVA, multiple linear regression and correlation tests. Results: The Total Social Attitudes Scale Score toward Childhood Epilepsies was calculated as 45.10 ± 7.81, and the Spiritual Orientation Scale Score was 89.88 ± 30.30 for parents with an average age of 36.64 ± 8.26. It was found statistically significant and high (p > 0.05) for parents who are female, have a higher level of education, and have previously received education about epilepsy regarding both the Total Social Attitudes Scale Score toward Childhood Epilepsies and the Spiritual Orientation Scale Score. A statistically significant positive correlation was found between the Total Social Attitudes Scale Score toward Childhood Epilepsies and the Spiritual Orientation Scale Score. Conclusion: According to the findings of the research, parents' attitudes towards childhood epilepsy are positive, and their spiritual orientation levels are high. As parents' spiritual orientation levels increase, their positive attitudes towards childhood epilepsy also increase.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfScopus1WoS1OpenAlex1
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  • MakaleYalnız künye2024Scopus SJRQ3
    EFFECT OF CRYOPROTECTANT AND CONCENTRATION ON THE SPERM QUALITY OF WALKING CATFISH, Clarias batrachus, POSTCRYOPRESERVATION

    Handayani, Luvi S.; Maulida, Siti; Rahayu, Sri R.; Razi, Nanda M.; Kocabas, Mehmet; Kocabas, Filiz K.; Wilkes, Martin; Siti-Azizah, Mohd N.; Eriani, Kartini; Fadli, Nur

    BACKGROUND: Walking catfish, Clarias batrachus is one of the native and most popular freshwater catfish species in Indonesia. However, cultivation faces challenges, particularly due to the scarcity of larvae resulting from underdeveloped breeding technologies. Cryopreservation is a method of storing sperm to maintain viability for a long period and support the breeding technology of the fish. Cryoprotectant, in this context, plays an important role in determining the success of sperm cryopreservation. OBJECTIVE: To determine the best type and concentration of cryoprotectant for cryopreservation of walking catfish sperm. MATERIALS AND METHODS: A total of five different types of cryoprotectants, namely DMSO, glycerol, ethyl glycol, ethanol, and methanol, were tested at four concentration levels namely 0%, 5%, 10%, 15%, and 20%, each with four replications. RESULTS: The type and concentration of cryoprotectant had a significant effect on sperm motility and viability (P<0.05). The best outcomes were obtained with 5% DMSO and ethyl glycol, 10% glycerol and methanol, as well as 15% ethanol. CONCLUSION: The highest motility and viability values were obtained with 5% DMSO, resulting in its recommendation for cryopreservation of walking catfish sperm.

    • SDG 2 · Açlığa Son
    AtıfScopus5OpenAlex3
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  • MakaleYalnız künye2024Scopus SJRQ1
    Effects of Er2O3 contribution on microstructure and mechanical properties of high entropy and dual phase alloys

    Taşgın, Yahya; Malkoç, Aziz; Kanca, M. Sait

    The study aimed to look at the differences between a high entropy alloy and a dual phase high entropy alloy with high iron and Mn content. It also wanted to find out what happened when a small amount of the rare earth element erbium oxide (Er2O3) was added to these alloys, especially on the mechanical and microstructure of the alloy. The first step in this study was to get 99 % pure metal powders, which were then made by dividing the powders into 30 g of equal weight. The powders were mixed evenly and then pressed into 10-g blocks under 6 tons of pressure. They were then set up to be melted in an arc. Four of the eight samples that were melted in an arc under vacuum were treated with heat. The four different compositions were then turned into small metallographic samples for SEM, EDX, Mapping, XRD, and microhardness tests. The study's imaging and analysis processes were also carried out. After that, SEM images were taken at various magnifications (100X, 500X, 1000X, 2500X, and 5000X), and EDS and XRD analyses were done on different structures found in these images. These analyses were based on literature research about the clarity of the metallographic images in the alloy, which showed the study's metallographic differences. The samples were put through microhardness and wear tests to see which one was stronger and less worn. The dual phase high entropy alloy (A2) was stronger and less worn than the high entropy alloy (A1). Er2O3 had little effect on the alloys' mechanical properties or microstructure. The heat treatment that was done to the samples helped the metallographic structure. In terms of physics, it didn't change the hardness much, but it did make the material wear less quickly.

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  • MakaleYalnız künye2024Scopus SJRQ1
    Microstructure, mechanical, and cutting performance properties of B4C and SiC reinforced sandwich composite segments

    Islak, Serkan; Çelik, Ertuğrul; Erol, Mümtaz; Houssain, Hasaneen

    This study aims to extend the work-life of diamond-cutting segments and to economize the operating cost of diamond-cutting tools. In order to achieve this object, bronze matrix sandwich segments reinforced with SiC and B4C were produced utilizing the hot pressing technique. In the term of the cutting segments, it is favorable that the outer layers are wear-resistant and the middle layer is tough. SEM and XRD analysis were used to determine the microstructural properties. Mechanical properties were evaluated by conducting hardness, wear, cutting performance, and three-point bending tests. The cutting performance of the segments was determined by turning andesite marble. SEM examinations showed that SiC and B4C grains were homogeneously distributed in the bronze matrix. The highest hardness value was 113.9 HB in the B4C reinforced sandwich segment. The reciprocating wear test findings indicated that the matrix exhibited the lowest wear rate in the B4C reinforced sandwich composite segment, followed by the hybrid sandwich composite segment. The lowest amount of cutting loss after turning andesite stone was achieved in the SiC, and B4C reinforced hybrid sandwich composite segment. The cutting performance of the hybrid sandwich composite segment increased by 46.15 % compared to the conventional segment without additives. The highest value of the transverse rupture strength of the specimens was 380 MPa for the B4C reinforced sandwich composite segment and 352 MPa for the hybrid sandwich composite segment. Considering all the tests and analyses, the hybrid sandwich composite segment sample may be the most suitable for diamond-cutting tools.

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  • MakaleYalnız künye2024Scopus SJRQ2
    Effect of repair patch nature on J-integral reduction in notched plates

    Houari, Amin; Kouider, Madani; Polat, Alper; Amroune, Salah; Mohamad, Barhm Abdullah; Chellil, Ahmed; Campilho, Raul

    Purpose: The purpose of this research is to evaluate the effectiveness of different repair patch materials in reducing the stresses at the crack tip of a 2024-T3 aluminum plate. This involves a numerical analysis using the finite element method (FEM) to estimate the reduction in the J-integral value, with the goal of identifying how various parameters related to the patch materials, adhesive properties and loading conditions influence the structural integrity of the repaired plate. Design/methodology/approach: The methodology of this research involves conducting a numerical analysis using the FEM to estimate the reduction in the J-integral value at the crack tip of a 2024-T3 aluminum plate. Three types of patches – metal, composite and functionally graded material (FGM) – were examined under tensile loading conditions, and Adekit-A140 adhesive was used to bond these repair patches to the aluminum plate. Findings: The analysis considered various parameters, including crack length, the nature of fibers in the composite material, the gradation exponent for FGM patches and the nature of the face in contact with the adhesive for the FGM patch. Additionally, stress analysis was conducted, examining the J-integral values for the plate, shear stress in the adhesive layer and peel stress in the composite patch. The findings highlight that modifying the nature of the repair patch used can significantly enhance the structural integrity of the repaired plate. Originality/value: The study analyzed J-integral values, shear stress in the adhesive and peel stress in the composite patch. Various parameters, including crack length, fiber type, gradation exponent and adhesive contact face nature, were considered. Results demonstrate that the J-integral value can be significantly reduced by altering the repair patch type, highlighting the effectiveness of customized patch materials in enhancing structural integrity.

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  • MakaleYalnız künye2024Scopus SJRQ1
    Effect of boron on microstructure, thermal, and mechanical properties of Ni–B matrix diamond cutting tools

    Islak, Serkan; Çelik, Ertuğrul; Houssain, Hasaneen; Danacı, Hacer Cemre

    This study examines the impact of adding boron on the microstructural, thermal, and mechanical properties of Ni–B alloy matrix diamond cutting segments, which are created using the hot pressing process. Microstructure was investigated using SEM-EDS and XRD analysis. The high-temperature oxidation behavior of the samples was determined by thermogravimetric analysis. The hardness was quantified employing Vickers hardness testing, as well as, sample densities were derived based on Archimedes' principle. The wear resistance was evaluated using the reciprocating wear test method. A three-point bending test was used to examine how the diamond grains were retained inside the Ni–B matrix. The XRD investigations identified the formation of Ni, Ni3B, and Ni2B phases. The thermogravimetric analysis results showed that Ni–B alloys were exposed to oxidation at elevated temperatures as the B content increased, However, a hardness improvement was observed as the B content increased due to the formation of borides. Furthermore, the tribological investigation reveals that adding the B as reinforcement has a positive effect at a specific amount, where the optimal wear resistance and minimal friction coefficient were evident at 6% B contained sample.

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  • MakaleYalnız künye2024Scopus SJRQ1
    First-ever fusion of high entropy alloy (HEA) with glass: Enhancing of critical properties of zinc-tellurite glass through TiZrNbHfTaOx incorporation

    Güler, Ömer; Kilic, G.; Kavaz, E.; Ilik, E.; Guler, Seval Hale; ALMisned, Ghada; Tekin, H.O.

    Many oxide additives have historically been used to enhance the radiation shielding properties of glasses, yet the potential of high-entropy oxides (HEOs), which have gained popularity in material science for their unique properties, has not been explored in this context. This study is the first to investigate the radiation shielding capabilities of Zinc-Tellurite glass infused with High Entropy Oxide (HEO), specifically utilizing the novel attributes of a synthesized TiZrNbHfTa. In this study, the nuclear shielding properties of newly fabricated Zinc-Tellurite glasses doped with TiZrNbHfTaOx with a composition (25ZnO·75TeO2)100-x. (TiZrNbHfTaOx)x (x = 0, 1, 2, 3, 4 mol%) were studied. Through the synthesis of a TiZrNbHfTa HEA and its integration into glass structure, we have developed a series of novel materials with enhanced protective properties against both gamma-ray and neutron radiation. Experimental results demonstrate that the HEO-infused glass, particularly the HEC1-4 composition, significantly surpasses traditional shielding materials in neutron attenuation, evidenced by its superior effective neutron removal cross-section. Additionally, the HEC1-4 glass demonstrates improved gamma-ray shielding capabilities, with increased mass attenuation coefficients and decreased half-value layers, indicating a higher capacity for photon interaction and absorption. It can be concluded that the incorporation of High Entropy Alloys into glass matrices not only opens a new frontier in radiation shielding materials but also provides a versatile and effective solution with considerable potential for enhancing safety measures in radiation-prone environments.

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  • MakaleYalnız künye2024Scopus SJRQ2
    A first-time fusion of TiNbWMoZrOx high entropy oxide (HEO) with zinc-tellurite glass: Toward superior physical properties

    Kilic, G.; Güler, Ömer; Kavaz, E.; Ilik, E.; Guler, Seval Hale; ALMisned, Ghada; Tekin, H.O.

    While numerous oxide additives have traditionally been employed to enhance the radiation shielding capabilities of glasses, the unique attributes of high-entropy oxides (HEOs), a group of materials acclaimed in contemporary material science for their distinctive properties have remained unexamined in this specific area. This novel study explores the enhancement of radiation shielding properties in zinc-tellurite glasses through the integration of TiNbWMoZrOx High Entropy Oxides (HEO). Utilizing advanced synthesis techniques, including mechanical alloying and oxidation, the research successfully incorporates HEOs into glass matrices, aiming to improve gamma-ray and neutron attenuation. Characterization through X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) confirms the uniform distribution and structural integrity of the HEOs within the glasses. The synthesis of glass samples with a base structure suitable for the molar composition of 25ZnO.75TeO2 (mol%) and glass samples doped with TiNbWMoZrOx (HEO) was carried out using the traditional high-temperature melting and annealing method. The outcomes demonstrate a concentration-dependent increase in shielding efficacy, particularly highlighting the superior performance of glasses doped with 4 mol% of TiNbWMoZrOx (HEC2–4), which exhibit significantly enhanced mass attenuation coefficients, lower half-value layers, and higher effective atomic numbers. This indicates the effective role of HEOs in boosting radiation protection capabilities. Comparative analysis with traditional shielding materials showcases the HEC2–4 glasses' competitive advantage, underlining their potential as a versatile shielding solution. It can be concluded that incorporating TiNbWMoZrOx high entropy oxides into zinc-tellurite glasses significantly augments their radiation shielding properties, offering a novel approach for enhancing protection against gamma-ray and neutron in various applications.

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  • MakaleYalnız künye2024Scopus SJRQ1
    Evaluating sustainability of urban mobility of Asian cities: An integrated approach of interval type-2 fuzzy best-worst method and MULTIMOORA

    Yucesan, Melih; Özkan, Barış; Mete, Suleyman; Gul, Muhammet; Özceylan, Eren

    The motivation for sustainable urban mobility is driven by the need to create environmentally friendly, socially inclusive, economically viable, and healthier cities for current and future generations. It requires a comprehensive approach that combines infrastructure development, policy changes, behavioral shifts, and technological advancements to transform urban transportation systems. The importance of creating increasingly sustainable urban transportation is now greater than it has ever been. One of the attempts in this field is the sustainable urban transport index (SUTI) developed by the United Nations (UN). Although the SUTI has a comprehensive pool of criteria for the evaluation of mobility sustainability of cities, considering the criteria weights as equal and disregarding the uncertainties present in expert opinions is viewed as a significant drawback. To satisfy the aforementioned deficiency, a novel integrated approach including the best-worst method (BWM), multi-objective optimization by ratio analysis (MOORA) and MOORA plus full multiplicative form (MULTIMOORA) method is develloped and applied for the SUTI evaluation. In order to manage ambiguous linguistic approximations, the utilization of BWM is applied within the framework of interval type-2 fuzzy (IT2F) sets. While IT2F-BWM is used to prioritize the main and sub-indicators of SUTI, MULTIMOORA approach is applied to rank the Asian cities. The findings imply that the proposed approach not only provides a more scientific perspective but also provides the opportunity to perform sensitivity analysis on criteria weights. Therefore, the results obtained in this study are expected to help cities to create a road map for planning sustainable urban mobility (e.g. Sustainable Urban Mobility Plan).

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfScopus23OpenAlex26
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  • MakaleYalnız künye2024Scopus SJRQ1
    Optimization of Pectin Extraction from Lemon Peel Powder by Ohmic Heating Using Full Factorial Design

    Çilingir, Seda; Duran, Gülseven; Gökyildiz, Beritan; Goksu, Ali; Sabanci, Serdal; Cevik, Mutlu

    Ohmic heating-assisted extraction has emerged as an effective method preferred in recent years. This extraction method is affected by experimental factors such as temperature, process time, and voltage gradient. The present study aimed to optimize the pectin extraction process from lemon peel powder samples by the ohmic heating-assisted extraction method. In this study, the effects of 3 different voltage gradients (7, 9, and 11 V/cm), 3 different solid to liquid ratios (1:20 g/mL, 1:40 g/mL, and 1:60 g/mL), and 3 different holding times (0, 60, and 120 min) and their interactions were investigated to determine the optimum extraction condition at constant temperature (80 °C) and pH = 1 sulfuric acid solution. The factors examined in the optimization procedure were pectin yield, power consumption, and energy efficiency. The optimum conditions were found to be 11 V/cm voltage gradient, 1:60 g/mL solid to liquid ratio, and 120-min holding time with a desirability value of 0.778. The results of this study could give important information about the design of industrial scale ohmic heating units, especially from different food wastes in industrial pectin production.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 12 · Sorumlu Üretim ve Tüketim
    AtıfScopus7WoS7OpenAlex5
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  • MakaleYalnız künye2024Scopus SJRQ3
    Analyzing the Chemical Constituents and In Vitro Biological Effects of Extracts Artemisia absinthium L. Extracts Obtained Using Different Methodologies and Solvents

    Yagi, Sakina; Zengin, Gokhan; Ibrahime Sinan, Kouadio; Yavuz Paksoy, Mehmet; Cziáky, Zoltán; Jekő, József; Dall'Acqua, Stefano

    The present study aimed to investigate the chemical constituents of different extracts from aerial parts of A. absinthium and to evaluate their antioxidant and enzyme inhibition activity. Extracts were prepared by maceration, infusion or Soxhlet techniques. Results showed that the highest total phenolic and flavonoids contents was recorded respectively from the hexane extract prepared by maceration and ethyl acetate extract obtained by Soxhlet method. The characteristic compounds of Artemisia species artemetin, casticin, sesartemin and yangambin in addition to coumarins were identified in all extracts. Aqueous extract obtained by infusion exerted the highest radical scavenging and ions reducing properties while that prepared by maceration displayed the highest chelating power. Methanol extracts obtained by the two methods of extraction exerted the highest anti-Tyr activity while that obtained by maceration showed the best α-glucosidase inhibition activity. These findings indicated that A. absinthium is a rich source of bioactive molecules with possible therapeutic applications.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfScopus2OpenAlex3
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  • MakaleYalnız künye2023
    The effect of boiling and baking process on total phenolic compounds and antioxidant capacity of Osmanoğlu and Sarıaşlama chestnuts grow in Bursa

    Benzer, Fulya; Karakavuk, Emrah; Eroğlu, Zeynep; Eymir, Aslı

    Chestnut is a fruit with high carbohydrate content, low-oil ratio and protein content, including minerals, vitamins, amino acids and phenolic compounds which can have antioxidant properties. It has been determined that the amount and composition of phenolic components could change in according to environmental and growing conditions, and the variety of chestnuts having impact on protein content. This study was conducted to investigate the possible effects of boiling and baking on some physical and chemical properties, antioxidant activity and total phenolic content of Osmanoğlu and Sarıaşlama chestnut varieties grown in Bursa. According to the results of the present study, some physical and biochemical properties of raw chestnut were determined as humidity 48.78–56.57 %, ash 1.11–1.27 g 100 kg⁻¹, water activity 0.705–0.844, pH 7.03–7.29, color L* 60.52±2,64; a* 0.13±0,18; b* 12.39±1.57. The total phenolic compounds content was 129.17±6.23 mg GAE (gallic acid equailent) kg⁻¹ in raw chestnuts, 180.97±18.25 mg GAE kg⁻¹ in boiled chestnuts, and 149.86±7.95 mg GAE kg⁻¹ in baked chestnuts. Also, the antioxidant capacity found like 0.42±0.01 μmol AAE (ascorbic acid equivalent) kg⁻¹ for raw chestnuts, 0.31±0.03 μmol AAE kg⁻¹ for boiled chestnuts, and 0.40±0.01 μmol AAE g⁻¹ of baked chestnuts. It was determined that while the application of the boiling process caused a significant decrease in the antioxidant activity of chestnuts, the application of the baking process did not cause any meaningful change on the antioxidant capacity of the chestnuts. It was determined that there was a significant increase in the total phenolic compounds content with the boiling and baking process compared to raw chestnuts.

    TR Dizinİncele
  • MakaleYalnız künye2023
    Emergency remote teaching: EFL instructors’ satisfaction with teaching online

    Alagozlu, Nuray; Tayşı, Eda

    The purpose of this study was to investigate English language instructors’ satisfaction with teaching online in an emergency remote teaching context. A mixed-method approach was used for data collection in which both quantitative and qualitative methods were used. While the quantitative data of this study were collected through the Online Faculty Satisfaction Survey (OFSS) with the participation of 205 instructors, semi-structured interviews were conducted with 16 instructors to collect qualitative data. The quantitative data were analysed through descriptive statistics. The qualitative data from semi-structured interviews were analysed through content analysis. The findings indicated that the instructors were not satisfied with teaching online. Although the convenience and flexibility of online education created a sense of satisfaction among the instructors, students’ low levels of motivation, participation and attendance in online classes, the lack of face-to face contact and interaction with the students, and students’ lack of technological equipment and internet connection problems were the most significant causes of the instructors' dissatisfaction with online teaching.

    • SDG 4 · Nitelikli Eğitim
    TR Dizinİncele
  • MakaleYalnız künye2023
    Türkiye’ de Müslüman-dostu otellerde konaklayan yerli misafirlerin profilini belirlemeye yönelik bir araştırma

    Öztürk, Yüksel; Ercan, Berna

    Son yıllarda Müslüman tüketicilerin turizm faaliyetlerine katılmaları, tatil sürecinde dinin emirlerini yerine getirmek istemeleri Müslüman-dostu turizm kavramını ortaya çıkarmıştır. Çalışmanın amacı Türkiye’de Müslüman-dostu otellerde konaklayan yerli misafirlerin seyahat profilini (seyahat etme nedeni, otelleri tercih etme nedeni vb.) belirlemektedir. Çalışmanın evreni Türkiye’ de Müslüman-dostu otellerde konaklamayı tercih yerli misafirlerden oluşmaktadır. Araştırma örneklemi olasılığa dayalı olmayan örnekleme yöntemlerinden kolayda örnekleme yöntemi ile seçilen 431 misafirden oluşmaktadır. Verilerin elde edilmesinde anket tekniği kullanılmıştır. Veriler SPSS programı kullanılarak tanımlayıcı istatistikler aracılığı ile analiz edilmiştir. Araştırma sonuçlarına göre misafirler seyahat etme nedenleri olarak dinlenmek ve eğlenmek, aile ile birlikte olmak, stres ve gerilimden kurtulmak istedikleri ortaya çıkmıştır. Müslüman-dostu otelleri tercih etme nedenleri otellerin alkolsüz bir ortam olması, helal yiyecek içecek ve mahremiyet olduğu ortaya çıkmıştır. Müslüman-dostu otellerde misafirlerin havuz/plajda vakit geçirmek, dinlenerek-eğlenerek ve aile ile vakit geçirdikleri yapılan araştırmada ortaya çıkmıştır. Müslüman-dostu otel seçiminde arkadaşların tavsiyesi, önceki seyahatler ve sosyal medya aracılığı ile tercih ettikleri görülmüştür.

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  • MakaleYalnız künye2023
    Innovation in New Public Administration in the Context of Adding Value to the Public: Digital Governance

    Boyali, Handan

    Today, social needs are generally met by the state or individuals or institutions under state control. For this reason, efficiency, quality and performance are important in the goods and services offered by the public administration. With the rapid spread of globalization, public administration has not been insensitive to these changes, and has led to the formation of the new public administration approach. While such innovative approaches are mostly seen in the private sector, it has been seen that they are less common in the public sector. Innovation movements, which emerged in the private sector in the 20th century, only started to be seen in the public administration at the beginning of the 21st century. In this context, digital governance in public administration is important in terms of adding value to the public. With this study, it has been tried to contribute to the field by trying to make it visible with the theories of management sciences as an application area and that innovation brings innovations in the public sphere as well as in many areas, although it is not regular. In the study, governance and new public administration were compared, and it was aimed to reveal the changes within the framework of innovation by examining the basic techniques that these two models applied in the public field. A theoretical perspective is presented by limiting the structure of these two models. Literature review method was used by using literature, digital resources and library materials.

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  • MakaleYalnız künye2023
    Bizans İmparatoru II. Nikephoros Phokas ve Doğu Seferleri (Kilikya, Antakya, Halep)

    Korunur, Harun

    Bizans İmparatorluğu için Doğu’da hâkimiyet sağlamak her zaman önemli oldu. Bizans imparatorları Kilikya, Antakya ve Suriye bölgelerinin Bizans hâkimiyetinde olmasını, bölge kontrolü açısından zaruri gördüler ve doğu politikalarını bu çerçevede planladılar. Bizans, yaşadığı coğrafya bakı-mından Hıristiyan ve Müslüman dünyasında önemli bir yer teşkil etti. Bizans İmparatorluğu kuruluşundan itibaren Anadolu’da hâkimiyet sağlamak için mücadelelerde bulundu. II. Nikephoros Phokas da bu amaç ile mücadelelerine devam etti. Soylu bir aileye mensup, başarılı bir asker olan II. Nikephoros Phokas, faaliyetleri ile Bizans’ı daha güçlü hale getirmek istedi. Bölge tarihi bakımından önemli bir yer tutan Bizans’ın, II. Nikephoros Phokas devri, araştırmamızın konusunu oluşturmaktadır. II. Nikephoros Phokas’ın imparatorluğu dönemi doğuda sınır güvenliğini sağlama amacı ile yaptığı mücadeleleri detayları ile aktarmak, yorumlamak ve bölge tarihine ışık tutmak amaçlanmıştır. Çalışmada ana kaynaklar ve araştırma eserlerden istifade edilmiştir. II. Nikephoros Phokas’ın tahta çıkışı, Kilikya bölgesinde hâkimiyet sağlaması, Antakya’nın ele geçirilişi ve son olarak Halep’in vassallık haline getirilişi işlenmiştir. II. Nikephoros Phokas’ın ölümü ile araştırma sonlandırılmıştır.

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