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Koleksiyondaki öğeler
- MakaleAçık Erişim2022Scopus SJRQ1Preliminary assessment of health risks associated with consumption of grapevines contaminated with mining effluents in Turkey: Persistent trace elements and critical raw materials
Topal, Murat; Arslan Topal, E.Işıl; Öbek, Erdal
In this study, some persistent trace elements and critical raw materials were investigated in grapevines contaminated with Pb–Zn mining effluents. The persistent trace elements under certain conditions remain without any change in form in the environment over long periods. The critical raw materials are the ones that have economic importance and have the risks associated with their supply. The health risks of persistent trace elements and critical raw materials in the leaves of grapevine that are consumed by humans were determined. The highest persistent trace elements concentrations followed the order of root > stem > leaf for Mn, Cu, Cd, Ni, and Cr while root > leaf > stem for Zn and leaf > root > stem for Pb. The maximum critical raw material concentrations for Co and V followed the order of root > stem > leaf. For Sb and La, these were leaf > root > stem and root > stem > leaf, respectively. The maximum critical raw materials concentrations for W was leaf > stem = root. The total maximum carcinogenic value was 0.146 for Cd while the total minimum carcinogenic value was 0.0054 for Pb. In this study, potential carcinogenic risk values in terms of ingestion of contaminated soil (Cr, Cd, and Ni) and dietary take of grapevine leaves (Ni, Cr, Cd, and Pb) are higher than acceptable levels (1 × 10−4 – 1 × 10−6). Maximum cancer risk on human health was determined as dietary intake of grapevine leaves. When hazard quotient for dietary (HQdie), hazard quotient for ingestion (HQing), and hazard quotient for inhalation (HQinh) values of critical raw materials were examined, the maximum values were observed for children. Also, the highest hazard quotient for dermal (HQder) value was determined for men. The hazard index and total hazard index values were >1 for critical raw materials. As a result, values >1 indicated potential non-carcinogenic human health risk associated with the consumption of grapevines contaminated with mining effluents. Actual region-specific exposure estimates for consumption of grapevines, however, were not evaluated. Integr Environ Assess Manag 2022;18:517–527.
AtıfScopus2WoS2OpenAlex3
İncele - MakaleAçık Erişim2021Scopus SJRQ1Teachers' views related the middle school curriculum for distance education during the COVID-19 pandemic
Aslan, Seda Akti; Turgut, Yigit Emrah; Aslan, Alper
This qualitative study aims to examine teachers’ opinions concerning the middle school curricula that have been in use for years, in order to determine its suitability for distance education during the COVID-19 pandemic. The participants consisted of eighteen middle school teachers from different subject areas in Turkey. A maximum variation sampling method was employed for participant selection. The data was collected through semi-structured interviews. Due to the pandemic, the interviews were conducted using video conferencing applications. The data was analyzed through content analysis. According to the findings, the teachers report that while they are effective in achieving cognitive objectives, they have difficulties in achieving affective and psychomotor objectives. In addition, the teachers do not prefer to design their own materials, rather they mainly benefit from ready-to-use materials during emergency distance education. The teachers also reveal that direct instruction and questioning were the teaching methods and techniques they preferred in online courses and that they were unable to adapt other methods and techniques to distance education, which resulted in students experiencing teacher-centered activities. Moreover, the teachers complain about students not attending the online courses on time or even at all, their disinterest, a lack of instant feedback, limited communication with students, and insufficient course lengths. Another critical finding was that the teachers only use homework, end-of-unit quizzes, and participation to online courses as measurement and evaluation tools and agree that they are unable to administer reliable and valid evaluation tools. The limitations of the study and implications for future research are later discussed.
AtıfScopus18WoS16OpenAlex40İncele - MakaleYalnız künye2022Scopus SJRQ2Eco-Friendly, Thermal Resistant Cotton Fabric Enhanced with Nano Zinc Borate Powder
İpek, Yeliz
The easy burning of cotton fabrics, which have the widest usage area among natural fibers, is a serious problem. Thus, treatment with an environmental friend flame retardant material is essential for cotton fabrics. Zinc borates are multifunctional fire retardants. They can act as smoke suppressor, flame retardant and spark suppressor. Since they are non-toxic and environmental friend materials, they are ideal flame retardants for fabric treatment. In this study, nano-sized zinc borate (ZnO·3B2O3·7H2O) was synthesized and cotton fabric was treated with zinc borate powder with a novel method. Zinc borates are slightly soluble in water. They were dissolved with aid of ammonia as zinc ammonia borate complexes and were recrystalised on the cotton fabric fibers through the evaporation of ammonia. The burning resistance of treated cotton fabric was investigated. The hardness, hydrophobicity, smoke suppression and burning resistance of untreated and treated cotton fabrics were compared. Since zinc borates have smoke suppression feature, a more slight smoke was observed and a higher rate of carbonization occurred during combustion test of treated cotton fabric compared to the untreated cotton fabric. In addition, the burning rate was reduced from 2.26 cm/s to 1.26 cm/s.
AtıfScopus4WoS3OpenAlex4İncele - MakaleYalnız künye2021Scopus SJRQ1Performance of marble powder on cementitious composites including waste steel chips as an additive
Gülmez, Nihan
The reuse of industrial waste materials in cement-based composites contributed to preventing increasing environmental problems and reducing production costs. This article examined the effectiveness of using recycled steel chips (Ast) from metal industry waste and waste marble powder (BMP) instead of cement and the possibility of obtaining eco-efficient specimen. While steel chips included in mortars as additives decreased workability, marble powder increased it. An increment in the level of substitution of steel chips resulted in a subsequent increase in water absorption percentages and apparent porosities of mortars. Maximum flexural strength was obtained in 2% steel chips-10% marble powder in waste system.
AtıfScopus16WoS15OpenAlex21İncele - MakaleYalnız künye2023Scopus SJRQ3Uncovering the gap between intention and behaviour towards knowledge sharing: Evidence from a hybrid healthcare institution
Uyan, Umut; Şanal, Musa
This study set out to test an integrative model towards knowledge sharing (KS) practices in health institutions, which have recently been referred to as knowledge-intensive organisations. The model assesses the relative contributions of various organisational and relational factors in explaining knowledge sharing intention (KSI), as well as the moderating effects of both socio-cognitive factors and the nature of knowledge to be shared on the relationship between KSI and knowledge sharing behaviour (KSB). The data utilised in the research were obtained from a health institution designed as a public-private partnership through the survey questionnaires. Findings suggest that highly formalised and hierarchical organisational structures negatively affect KSI, whereas constructive communication climate and organisational integration enhance it. The relationship between facilitating tools and technologies, which is the last of the organisational factors examined, and KSI was non-significant. Two out of the three relational factors, trust and affiliation, positively predicted KSI, but no statistically significant relationship was found between normative beliefs and KSI. Finally, the results suggest that the perceived reciprocity eases the translation of the intention towards KS into actual sharing behaviour, whereas the perceived power loss weakens the mentioned relationship.
AtıfScopus5WoS5OpenAlex4İncele - MakaleAçık Erişim2022Scopus SJRQ2Effect of Cu, Sn and Sb addition on the structural, thermal and magnetic properties of body-centered cubic structured CoNiMnGaSi high entropy alloy
Şimşek, Telem; Özkul, İskender; Canbay, Canan Aksu; Avar, Barış; Şimşek, Tuncay; Güler, Seval Hale; Özcan, Sadan; Güler, Ömer; Chattopadhyay, Arun K.
In this study structural, morphological, thermal and magnetic properties of equiatomic CoNiMnGaSi (base), CoNiMnGaSiCu, CoNiMnGaSiSn and CoNiMnGaSiSb alloys are discussed. The formation of solid-solution nanocrystalline bcc structure of the alloys was determined by XRD and DTA techniques. SEM–EDS analyses also revealed the homogeneous distribution of the elements. The room temperature magnetic hysteresis loops showed that as-casted alloys reached saturation easily with coercivity less than or equal to 35 Oe. As the Cu and Sn were added to the alloy, the saturation magnetization was decreased from 112 emu/g to 50 emu/g, which was mainly due to the substitution of non-magnetic atoms to the magnetic Co in the base CoNiMnGaSi alloy, whereas the addition of Sb to the base alloy did not have a significant effect on the Ms. The CoNiMnGaSiSb was found to have the highest Curie Temperature of 670 K, which makes the alloy a promising candidate for power industry-related applications.
AtıfScopus3OpenAlex4İncele - MakaleAçık Erişim2021Scopus SJRQ2An ethnoveterinary study on plants used for the treatment of livestock diseases in the province of Giresun (Turkey)
Güler, Osman; Polat, Rıdvan; Karaköse, Mustafa; Çakılcıoğlu, Uğur; Akbulut, Sefa
The lack of ethnoveterinary surveys in Turkey, results in losses in the veterinary phytopharmacology field. This is the first ethnoveterinary research in which statistical calculations about plants are done by informant consensus factor (ICF) method in the Blacksea Region of Turkey. To catalog, analyze, and disseminate the knowledge of plant use in ethnoveterinary practices in the province of Giresun (Turkey). Information was gathered through open and semi-structured interviews with local people, mainly elderly shepherds and farmers, in the Giresun province. The collected data was analyzed quantitatively using two indices, informant consensus factor (ICF). A total of 65 ethnoveterinary plants belonging to 38 families are used for the treatment of animal diseases. According to the local farmers, the most often mentioned species that used in the resarch area have high ethno-veterinary potential. Most of these plants are also used for some human conditions in the study area. There are large numbers of ethno-veterinary practices EVPs in southern Turkey with undocumented cumulative knowledge of the indigenous people. Unfortunately, some evidence of their slow disappearance has been found. The traditional knowledge in the treatment of livestock diseases of the Giresun districts needs further scientific evaluations by phytochemical and antimicrobial experimentation.
AtıfScopus65WoS54OpenAlex57İncele - MakaleAçık Erişim2022Scopus SJRQ3A New Rail Surface Defects Detection Approach Using 3D Laser Cameras Based on ResNet50
Santur, Yunus; Yilmazer, Merve; Karakose, Mehmet; Akin, Erhan
Rail transportation systems, which are used as one of the most common means of transportation worldwide, should be regularly inspected to prevent accidents that may occur. The rail condition monitoring can be performed in high accuracy and real time using computer vision, deep learning algorithms today. In this study, a new deep learning based approach using 3D laser cameras for rail inspection is presented. In the proposed approach, two 3D laser cameras placed on a real train, seeing the rail line from the left and right surfaces were used. These data consisting of sensitive distance value constitute the input data of the ResNet50 transfer learning model. The training was carried out on Nvidia Cuda supported graphics processing units using ResNet50 Convolutional Neural Network. During the test phase, the operation speed and accuracy rate of the method was measured by repeating the process on real-time rail profiles. The accuracy rate was calculated as 94%. As a result a new approach is presented based on deep learning using 3D laser cameras for rail inspection is presented.
AtıfScopus12WoS8OpenAlex9İncele - MakaleAçık Erişim2022Scopus SJRQ2Temperature-Dependent Density and Magnetohydrodynamic Effects on Mixed Convective Heat Transfer along Magnetized Heated Plate in Thermally Stratified Medium Using Keller Box Simulation
Ullah, Zia; Akkurt, Nevzat; Alrihieli, Haifaa F.; Eldin, Sayed M.; Alqahtani, Aisha M.; Hussanan, Abid; Ashraf, Muhammad; Jabeen, Mah
The heat transmission properties along the non-magnetized geometries have been numerically obtainedby various researchers. These mechanisms are less interesting in engineering and industrial processes because of excessive heating. According to current studies, the surface is magnetized and the fluid is electrically conductive, which helps to lessen excessive surface heating. The main objective of the current analysis is to numerically compute the temperature-dependent density effect on magnetohydrodynamic convective heat-transfer phenomena of electrical-conductive fluid flow along the vertical magnetized and heated plate placed in a thermally stratified medium. For the purpose of numerical analysis, the theoretical process governing heat and magnetic intensity along a vertical magnetic plate is examined. By using suitable and well-known similarity transformations for integration, the non-linear coupled PDEs for the aforementioned electrical-conductive fluid flow mechanism are changed and subsequently converted into non-similar formulation. The Keller Box method is used to numerically integrate the final non-similar equations. The MATLAB software program plots the transformed algebraic equations graphically and quantitatively. The behavior of the physical quantities such asvelocity graph, magnetic field graph, and temperature plot along with their slopes that arerate of skin friction, the rate of heat transfer, and the rate of magnetic intensity for different parameters included in the flow model. The novelty of the current work is to compute the magneto-thermo analysis of electrically conducting flow along the vertical symmetric heated plate. First, we secure the numerical solution for steady part and then these results are used to find skin friction, heat transfer, and magnetic intensity. In the current work, the fluid becomes electrically conducing due to a magnetized surface which insulates heat during the mechanism and reduces the excessive heating. The results are excellent and accurate because they are satisfied by its given boundary conditions. Additionally, the current problems have a big impact on the production of polymer materials, glass fiber, petroleum, plastic films, polymer sheets, heat exchangers, catalytic reactors, and electronic devices.
AtıfScopus20OpenAlex18İncele - MakaleAçık Erişim2022Scopus SJRQ2A New Hybrid Fuzzy Multi-Criteria Decision Methodology for Prioritizing the Antivirus Mask over COVID-19 Pandemic
Kaya, Sema Kayapinar; Pamucar, Dragan; Aycin, Ejder
During the COVID-19 pandemic, masks have become essential items for all people to protect themselves from the virus. Because of considering multiple factors when selecting an antivirus mask, the decision-making process has become more complicated. This paper proposes an integrated approach that uses F-BWM-RAFSI methods for antivirus mask selection process with respect to the COVID-19 pandemic. Finally, sensitivity analysis was demonstrated by evaluating the effects of changing the weight coefficients of the criterion on the ranking results, simulating changes in Heronian operator parameters, and comparing the obtained solution to other MCDM approaches to ensure its robustness.
AtıfScopus21WoS15OpenAlex23İncele - MakaleAçık Erişim2021The antioxidant and antimicrobial capacities of phenolic profiles of some Salvia L. Seeds grown in Turkey
Emre, Irfan; Kursat, Murat; Kirbag, Sevda; Erecevit, Pinar; Emre, Mustafa Yunus; Yilmaz, Okkes; Civelek, Semsettin
The aim of current study is to show phenolics, antioxidant capacities and antimicrobial activities of seeds of five Salvia L. (S. frigida Boiss., S. candidissima subsp. candidissima Vahl., S. virgata Jacq., S. verticillata L. var. verticillata and S. russellii Benth.) taxa grown in Turkey. The flavonoid and phenolic acid contents were measured by using HPLC whilst the antioxidant capacities were determined by using different methods. In addition, agar well diffusion method was used to determine the antimicrobial activities of Salvia species in this study. It was found that S. frigida, S. verticillata var. verticillata and S. russellii have the highest catechin contents and S. frigida and S. verticillata var. verticillata have high rosmarinic acid while S. frigida, S. candidissima subsp. candidissima and S. verticillata var. verticillata have high vanilic acid. Also, it was determined that S. frigida and S. verticillata var. verticillata have high DPPH radical scavenging activities in 150 and 250 µL while S. frigida and S. verticillata var. verticillata have highest ABTS radical scavenging activity in all concentrations apart from 25 µL for S. frigida. Furthermore, S. frigida and S. verticillata var. verticillata have high total phenolic contents. On the other hand, Salvia species have similar lipid peroxidation inhibitions. However, the metal chelating activities of Salvia species are different. And also, it was demonstrated that Salvia taxa have antimicrobial activity.
AtıfScopus7OpenAlex7TR Dizin2
İncele - MakaleAçık Erişim2022Scopus SJRQ1A method for generation of substitution box based on random selection
Artuğer, Fırat; Özkaynak, Fatih
Two basic requirements must be met to encrypt data. These requirements are confusion and diffusion properties. In particular, block cipher algorithms are based on a cryptographic component known as substitution-box to provide the need for confusion. Therefore, attack scenarios generally focus on this cryptographic component. There are alternative design approaches for substitution-box design. It is known that each design approach has several advantages and disadvantages. In this study, an alternative method is proposed to address the problems of the substitution-box design approach based on random selection. The success of the proposed method has been tested in three different scenarios. Analysis results for these three scenarios showed that generated substitution-box provides performance increase for nonlinearity criterion from s-box design criteria. Successful results achieved; It points out that improvement cryptographic components can be used in a variety of practical applications such as block ciphers, masks to prevent side-channel attacks, random number generators, and image encryption algorithms.
AtıfScopus29WoS25OpenAlex35İncele - MakaleAçık Erişim2022Job Satisfaction, Intent to Stay at Work, and Burnout Levels of Nurses Working in Coronavirus Disease 2019 Clinics: A Cross-Sectional Study
Erkuş Küçükkelepçe, Gülhan; Arslan Şeker, Sevda; Karaca, Türkan
Objective: It is thought that the fact that coronavirus disease 2019 pandemic process has been continuing for a long time, and the level of job satisfaction of nurses may have an impact on their intention to experience burnout and stay at work. This study aimed to determine the relationship between job satisfaction, intention to stay, and burnout levels of nurses working in coronavirus disease 2019 clinics. Methods: This descriptive and correlational study was conducted with 325 nurses who were working in coronavirus disease 2019 clinics. Data were collected using the sociodemographic characteristics form, the Minnesota Satisfaction Questionnaire, the Maslach Burnout Inventory, and the Intent to Leave Job Scale. Descriptive statistics, correlation analysis, and regression analysis were used in the analysis of the research data. Results: Emotional exhaustion, depersonalization, personal achievement, and intent to leave explain 45% of job satisfaction (F = 67.911, p =.000); job satisfaction and intent to leave explain 40% of emotional exhaustion (F = 111.470, p =.000), 16% of depersonalization (F = 33.785, p =.000), and 20% of personal achievement (F = 43.102, p =.000); job satisfaction, emotional exhaustion, depersonalization, and personal achievement explain 24% of intent to leave (F = 27.190, p =.000). Conclusion: The prolongation of the coronavirus disease 2019 pandemic, the uncertainty of the process, and the conditions related to the working environment of the nurses have an effect on job satisfaction, burnout, and intent to leave. The continuity of the well-being of employees is an important issue that needs to be emphasized and evaluated, as it will have a multi-faceted effect to be ready for different pandemics in the near/far future.
AtıfScopus1WoS1İncele - KitapYalnız künye2023Travelling Theory and Women’s Movements in Turkey: Imagining Europe
Gulcicek, Demet
Drawing on archival research, Travelling Theory and Women’s Movements in Turkey examines the imagination of Europe in the context of women’s rights movements in a self-defined non-European setting. It brings travelling theory, poststructuralist feminist theories and orientalist studies together to provide an original theoretical framework for understanding the complex and often contradictory imaginations of Europe. Such imaginations can be an object of desire, fantasy, hate and hostility in a non-European context. This volume sheds light on the manner in which local power dynamics are reproduced, negotiated and subverted during the travel of women’s and feminist movements. With a focus on the late Ottoman Empire, the book questions how ‘Other’ positions can be inhabited by the ‘Self’ and unpacks sexual and normative dimensions of demanding women’s rights in this context. As such, it will appeal to scholars of sociology, cultural studies and gender studies with interests in feminist theory and notions of European and non-European categories.
AtıfOpenAlex1İncele - MakaleYalnız künye2023Scopus SJRQ4Development of a best-worst method based MCDM approach for solar power plant location selection: an application to Tunceli, Turkey
Aykac, Yunus Emre; Yucesan, Melih; Gul, Muhammet
Solar energy stands out with its increasing potential in the world. The decision to choose the location of a solar power plant is very important due to the investment return. In this study, a solar power plant site selection for Tunceli, Turkey is studied with a two-stage multi-criteria decision-making approach. In the first stage, the importance levels of the determined nine factors are obtained by the best-worst method (BWM). In the second stage, the most appropriate site is selected among the eight districts of Tunceli. As a result of the first stage, solar and fault line emerged as the most and least important factor, respectively. The second stage showed that Pertek district is the most suitable place. A comparative framework has been created including five different MCDM methods, which strengthens the final decision's accuracy and reveals whether each method's results are correlated.
AtıfScopus5OpenAlex3İncele - MakaleAçık Erişim2022Scopus SJRQ1Academicians’ awareness, attitude, and use of open access during the COVID-19 pandemic
Turgut, Yigit Emrah; Aslan, Alper; Denizalp, Nuran Varlı
The aim of this research is to reveal academics’ awareness, attitude, and use of open access. In line with the research purpose, the survey research design is adopted. This research consists 151 academics from 12 basic research areas; eight of them being Professor Dr, 17 being Associate Professor Dr, 49 being Doctor Lecturer, and 77 being Research Assistant or Lecturer. A questionnaire consisting of 19 open access and five demographic information questions was used for the data collection tool. The research results show that 75% of the academics have open access awareness and that their awareness is generally created by information that they obtain through the Internet and their friends. In addition, most of the academics indicate that their awareness of open access has increased during the pandemic period. When considering the level of academics’ use of open access, it is found that 75% of the academics use articles in open access journals for their own research and 51% of the academics do not publish any articles in open access journals.
AtıfScopus20WoS18OpenAlex19İncele - MakaleAçık Erişim2022Scopus SJRQ4New dinuclear cyanido complexes with amine alcohol ligand: Synthesis, characterization and biotechnological application potential
Korkmaz, N.; Korkmaz, Ş.A.; Ceylan, Y.; İmamoğlu, R.; Bülbül, A.S.; Karadağ, A.
In this study, the cyanido complexes given by the formula [Ni(Abut)Ni(CN)4 ]·8H2 O (C1), [Cu(Abut)2 Ni(CN)4 ]·7H2 O (C2), [Zn(Abut)Ni(CN)4 ]·8H2 O (C3) and [Cd(Abut)Ni(CN)4 ]·7H2 O (C4) were ob-tained by microwave synthesis method. The powder forms of the complexes were characterized by elemental, FT-IR spectroscopy, and thermal analysis. And also antibacterial, antibiofilm and anticancer activities were investigated. The splitting stretching bands of cyanido groups in the FT-IR spectra of C1-C4 indicated the assets of terminal and end cyanido groups. The antibacterial activities of C1-C4 were tested with nine Gram negative and six Gram positive bacteria. The most efficient antibacterial activity of complexes was observed at 1000 µg/ml-1 concentration. Anticancer activity was tested using HeLa cell line and MTT test. The studied cyanide complexes have been shown to decrease the viability of HeLa cells with IC50 values 14.86, 6.5, 7.2 and 19.2 µg/ml for C1, C2, C3 and C4 complex, respectively.
- MakaleYalnız künye2022Scopus SJRQ2Integrated electron beam irradiation treatment with hydrogen peroxide aqueous solution to inactivate Salmonella on grape tomatoes
Omac, Basri; Moreira, Rosana G.; Castell-Perez, Elena M.
This study investigated the efficacy of integrated electron beam (e-beam) irradiation and hydrogen peroxide (H2O2) aqueous solution treatments to inactivate mixed strains of Salmonella inoculated in grape tomatoes. Whole grape tomatoes were inoculated with a mixed bacterial cocktail composed of five strains of Salmonella enterica corresponding to serotypes Rissen (SAL1449), Montevideo (SAL4599), Saintpaul (476398), and Typhimurium (ATCC 13311 and ATCC 700720), dried in a biological safety cabinet for 2 h at room temperature and then stored at 4°C for 24 h to facilitate bacterial attachment before treatment. Tomatoes in H2O2 (60 mg/L) aqueous solution were irradiated at 0.45, 0.60, 0.75, 1.0, and 1.25 kGy dose. The combined treatment of 1.0 kGy radiation dose and 60 mg/L H2O2 achieved 4-log reductions in Salmonella. The D10−average value of Salmonella in the present study was 0.25 ± 0.01 kGy. Regarding the effect of the treatment on tomato quality, the combined application of e-beam up to 1.25 kGy and H2O2 (60 mg/L) did not affect (p >.05) the color and texture of grape tomatoes compared to non-irradiated samples. Furthermore, the combined treatments of e-beam and H2O2 aqueous solution reduced the dose uniformity ratio (DUR) by 7%, a relevant finding regarding commercial applications of electron beam accelerators. Exposure of the tomatoes to e-beam and water wash with added H2O2 is a promising decontamination system for use in tomatoes and other produce processing. Further studies on the optimization of this integrated treatment are needed. Practical Applications: Electron beam irradiation of tomatoes immersed in hydrogen peroxide (H2O2) solution reduces the dose required to eliminate pathogens in the fresh produce. The integrated treatment ensures minimal changes to produce quality and increased treatment efficiency in terms of dose uniformity.
AtıfScopus5WoS5OpenAlex4İncele - MakaleYalnız künye2021Scopus SJRQ2Determination of Optimum Process Conditions by Central Composite Design Method and Examination of Leaching Kinetics of Smithsonite Ore Using Nitric Acid Solution
Tanaydın, Mehmet Kayra; Bakıcı Tanaydın, Zümra; Demirkıran, Nizamettin
The leaching behavior of Tunceli smithsonite ore in nitric acid was evaluated in two study steps including optimization of leaching process and kinetics modeling. The individual and synergistic effects of effective parameters such as nitric acid concentration, solid-to-liquid ratio, stirring speed, and temperature on the dissolution rate of zinc were investigated using central composite design. Four factors including temperature (30–50 °C), nitric acid concentration (0.2–0.5 mol/L), stirring speed (350–600 rpm), and solid-to-liquid ratio (0.004–0.01 g/L) were investigated. The dissolution percent of zinc (97%) was obtained in 120 min of leaching time: acid concentration 0.5 mol/L, temperature 50 °C, stirring speed 500 rpm, and solid–liquid ratio 2/500 g/mL at the optimum conditions obtained using the central composite design. The dissolution kinetics of smithsonite was examined according to heterogenous models and it was found that the dissolution rate was controlled by ash layer diffusion process. It was found that the leaching rate increased with increasing temperature, stirring speed, and acid concentration as well as decrescent particle size and solid/liquid ratio. The trial data were analyzed by statistical and graphical methods and the activation energy of this leaching process was determined to be 28.63 kJ·mol−1. Graphical Abstract: [Figure not available: see fulltext.].
AtıfScopus9WoS9OpenAlex10İncele - MakaleYalnız künye2021Scopus SJRQ1Relationship of knowledge about and attitudes towards violence with recognition of violence against women among health staff in pre-hospital emergency medical services
Gümüşsoy, Süreyya; Dönmez, Sevgül; Ekşi, Ali; Dal, Nursel Alp
Background: Domestic violence, specifically, violence against women, is prevalent in all segments of society regardless of social class, ethnicity, culture or country. In other words, domestic violence is a global concern. Aim: The study aims to investigate the relationship between the attitude and knowledge of the health staff in pre-hospital emergency medical services about violence against women and their recognition of such form of violence. Methods: This descriptive study was conducted on 1023 paramedics and emergency medicine technicians who work in the pre-hospital emergency health setting and are members of the Paramedic and Pre-hospital Emergency Medicine Association. The Attitudes towards Violence against Women Scale (ATVAWS) and Health Staff's Recognition of Signs of Violence against Women Scale (HPRSVAWS) were used for data collection. Results: The mean scores for the ATVAWS and HPRSVAWS were 46.68 ± 6.92 and 20.31 ± 3.23, respectively. Of the participants, 48.5% had been subjected to violence, 43.93% had been subjected to violence perpetrated by their mothers, 41.53% had been exposed to physical violence and 4.2% remain exposed to domestic violence. Participants who had been exposed and those who remain exposed to domestic violence produced high scores in ATVAWS, which indicates an improvement in the traditional approach (less opposing view) to violence. High scores in the ATVAWS for (a) those who were exposed to violence in their workplaces, (b) who had never attended to actual or suspected cases of violence against women in their professional life, (c) who had attended to seven or more cases of violence against women, (d) who were less competent in physically examining actual or suspected cases of violence and (e) who had not been trained on violence against women, which indicates an increase in the traditional approach to violence. Conclusion: The study found that health staff in emergency health stations better recognised the signs of violence against women as their attitudes towards violence were less similar to the traditional approach. That is, they mostly held non-violent views. The characteristics, attitudes, perceptions and values of health professionals were considered important factors in addressing violence.
AtıfScopus7WoS4OpenAlex10İncele
