Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(64)
- Merdan, Mehmet(47)
- Baltaci, Cemalettin(35)
- Kulakaç, Nurşen(28)
- Duran, Celal(27)
- Ozdes, Duygu(24)
- Turan, Ibrahim(24)
- Demir, Selim(23)
- Türkkan, Tuğba(22)
- Bayrakdaroglu, Serdar(21)
- Topal, Fevzi(21)
- Öztürk, Serkan(21)
- Ürkek, Bayram(21)
- Gücer, Mehmet Ali(20)
- Akar, Zeynep(19)
- Kaygusuz, Abdullah(19)
- Topal, Meryem(19)
- Anaç, Halil(18)
- Aydin, Aydanur(18)
- Batan, Nevzat(18)
- Erata, Hüseyin(18)
- Tuncer, Metin(18)
- Akyürek, Suat(17)
- Baltacı, Cemalettin(17)
- Karimullah, Suud Sarim(17)
- Acet, Tuba(16)
- Akar, Bülent(16)
- Ashyralyyev, Charyyar(16)
- Düzgün, Azer Özad(16)
- Hintistan, Sevilay(16)
- Yılmaz, Coşkun(16)
- Aliyazicioglu, Yuksel(15)
- Kaya, Hacer(15)
- Kurnaz, Muammer(15)
- Kurt, Kemal(15)
- Ozden, Talat(15)
- Yilmaz, Coskun(15)
- Yuksel, Ferhat(15)
- Yücel, Cem(15)
- Öz, Mehmet(15)
Yayınlar
- MakaleAçık Erişim2022Scopus SJRQ3Women Entrepreneurs' Education Level, Political Skill, and Firm Performance: Political Influence and Human Capital Theories
Demirbaǧ, Orkun; Demirbaǧ, Kübra Simşek; Batl, Gülgönül Bozoǧlu
Purpose: Because of the growing interest in the literature in education and political skill as facilitators of firm performance, this article aims to reveal whether there is a moderating role of women entrepreneurs' political skill on the relationship between their education level and firm performance when firm- and entrepreneur-level characteristics remain under control. Methodology: The study was conducted in Istanbul, Kocaeli, and Bursa, cities with the lowest gender gap in Turkey. The participants of the questionnaires were 291 entrepreneurs who are members of the Women Entrepreneurs Association of Turkey (KAGIDER), the Women Entrepreneur Members of Endeavor Turkey, and the TOBB Women Entrepreneurs. Hierarchical regression analysis was performed to analyze the dataset. Findings: When firm- and the entrepreneur-level characteristics remain under control, women entrepreneurs' political skill shows a moderator role in the relationship between women entrepreneurs' education level and firm performance. Practical Implications: A bachelor's degree or higher, along with political skill, allow women entrepreneurs to increase their firm performance. Furthermore, the higher the political skill, the higher the effect of education level on firm performance. Originality/Value: This is the first study to investigate the moderating role of political skill of women entrepreneurs in the relationship between education level and firm performance. Moreover, political influence and human capital theories are jointly applied to the theoretical model.
AtıfScopus4WoS2OpenAlex5
İncele - MakaleAçık Erişim2022Scopus SJRQ2The relationships between institutionalization and dual commitment: A study on hotel kitchen employees
Evren, Emine Şimşek; Celil Çakıcı, A.
Long-termed continuance of employees in hotel enterprises, especially in kitchen department where standard production is of utmost importance, is critical for organizational success. At this point, how institutionalization, a phenomenon that is usually associated with standardization, effects the organizational commitment (OC) is an important question. Another important question is how commitment to an impressive supervisor such as the chef mediates the relationship between institutionalization and OC in institutionalized hotels where standards become important instead of personal approaches. In this context, the relationship between institutionalization, OC, and commitment to the supervisor (CS), which has not been studied before, has been examined within the framework of hotel businesses. The data were collected with an online survey. The sample consisted of the kitchen staff of a national hotel chain in Turkey. The findings demonstrated that the effects of institutionalization on OC and CS were significant. CS partially mediates the relationship between institutionalization and OC. When considered within the scope of the dimensions, the CS has a partial mediating effect on the relationship between cultural power and all three dimensions of OC (affective, continuance, normative). The effect of formalization and professionalization on affective and normative commitment is partially mediated by CS.
AtıfScopus1OpenAlex2İncele - MakaleAçık Erişim2022Scopus SJRQ3Three remarkable Bryophyte species new to Turkey and South–west Asia
Erata, Hüseyin
Turkey, which is surrounded by seas on three sides and consists of three phytogeographic regions, has a very large biological diversity. As a result of extensive bryophyte surveys across the different parts of the Dereli district in Giresun province from Turkey, Dicranum transsylvanicum, Nardia geoscyphus, and Andreaea crassinervia are reported as a new record for Turkey and Southwest Asia. Also, Dicranum transsylvanicum is new to Asia. Descriptions, illustrations, geographic distribution, ecological characteristics, and comparisons with morphologically similar taxa are provided.
AtıfScopus2WoS2OpenAlex10İncele - MakaleAçık Erişim2022Scopus SJRQ3Comparison of deep learning and regression-based MPPT algorithms in PV systems
Karabi̇Naoğlu, Murat Salim; Çakir, Bekir; Başoğlu, Mustafa Engin; Kazdaloğlu, Abdülvehhab; Güneroğlu, Aziz
Solar energy systems (SES) and photovoltaic (PV) modules should be operated at the maximum power point (MPP) to achieve the highest efficiency in the energy generation processes. Maximum power point tracking (MPPT) applications using conventional methods may not be able to follow the global MPP (GMPP) of the PV system under changing atmospheric conditions and they could oscillate around the local MPP. In this study, a machine learning and deep learning (DL) based long short-term memory (LSTM) model is proposed as an innovative solution for MPPT. Contrary to the traditional MPPT applications using current and voltage sensors, the output resistance of the PV module estimation was made by using environmental parameters (such as temperature and radiation) and artificial intelligence algorithms in this study.The LSTM model was compared with artificial neural networks (ANN) and regression methods regarding mean square error (MSE), root mean square error(RMSE) and mean absolute error (MAE) parameters. It has been determined that the LSTM model has a better performance and could more successfully follow MPP compared to the other methods. Finally, after the comparison with the ANN method, it is proved that LSTM gives 37%, 21%, and 31% more successful MSE, RMSE, and MAE results, respectively.
AtıfScopus27WoS18OpenAlex23
İncele - MakaleAçık Erişim2022Scopus SJRQ3Adaptation of the pain management self-efficacy questionnaire into Turkish; [Ağrı yönetimi öz yeterlilik ölçeğinin türkçeye uyarlanması]
Aydin Sayilan, Aylin; Eşki̇N Bacaksiz, Feride; Seyhan Ak, Ezgi; Kulakaç, Nurşen; Macindo, John Rey B.
Objectives: The aim of this study is to examine the Turkish validity and reliability of the Pain Management Self-Efficacy Questionnaire (PMSEQ). Methods: The study was carried out descriptively and methodologically between September and December 2018 with 214 nurses and 248 nursing students. The data were collected using the descriptive characteristics form and the PMSEQ. Results: Cronbach’s alpha internal consistency coefficient was 0.90 in the total scale. In repeated measurements to test time reliability, there was no statistically significant difference between the two measurements (t=0.320, p=0.751), and there were a high power and positively highly significant relationship (r=0.997, p<0.001). Conclusion: Turkish version of the PMSEQ can be used as a valid and reliable scale in assessing the self-efficacy of clinical nurses and nursing students in pain management.
AtıfScopus9WoS12OpenAlex8TR Dizin3
İncele - MakaleAçık Erişim2022Scopus SJRQ4CONSUMERS PERCEPTION AND BEHAVIOUR TOWARDS GEOGRAPHICAL INDICATION PRODUCTS: THE CASE OF TRADITIONAL PESTIL FROM GUMUSHANE, TURKEY
Nilgün-Doğan, Üyesi; Adanacıoğlu, Hakan
The main objective of this study was to assess the relationship between the level of consumers perception of products with geographical indication (GI) and their consumption of products with GI labels. Geographically indicated products were examined within the scope of Gumushane fruit pulp (mulberry pestil), which was registered as a Protected Geographical Indication (PGI) in 2004. This research conducted an online survey of 166 consumers living in Gumushane province in Turkey. Data was obtained from the online surveys that were conducted between June and September 2020. Binary logistic regression analysis method was used to identify the factors affecting the probability of consuming products with GI labels. The model results show that middle-aged, married, and middle-income and consumers who correctly perceive the concept of geographical indication products are more likely to consume products with GI labels. According to the logistic regression results, the increase in consumers level of correct perception of the product notion with GI label increases the probability of consuming products with GI label 2.5 times. The results of this study also tell us that the market share of these products can be increased by improving the consumer perception towards geographically indicated products. Policymakers can also take advantage of these insights to improve lucid understanding of how labels are actually interpreted by consumers.
AtıfScopus3OpenAlex4İncele - MakaleAçık Erişim2022Scopus SJRQ1The image of nursing among nursing and other healthcare professional university students: A mixed-method study
Apaydin Cirik, Vildan; Gül, Uğur; Aksoy, Bahar
Aim: This study had three objectives: (1) determining the image of nursing in the eyes of undergraduate health sciences students; (2) identifying factors affecting that image; and (3) evaluating students’ views and experiences regarding that image. Background: If healthcare students perceive nursing positively, it may result in directing future generations to nursing, and improving nursing, and reducing the need for nurses. Design: This study adopted an explanatory sequential design with participant selection variant. The design involved data collection in two consecutive phases. Methods: A mixed-method design using quantitative data and qualitative interviews was used. In the quantitative phase, a descriptive and cross-sectional research method was used. The qualitative phase was based on phenomenological research. The quantitative portion was performed with 1556 participants in their second, third or fourth year during the 2019–2020 academic year. Students were from the nursing, emergency and disaster management, nutrition and dietetics, occupational health and safety, health management, and social work departments. The qualitative portion was performed with 29 participant volunteers. Participants were interviewed on the phone. The data were collected using an introductory information form, a nursing image scale, and semi-structured interviews. The quantitative data were analyzed using descriptive statistics and the independent-samples t-test, Mann-Whitney U test, one-way ANOVA, and stepwise linear regression. The quantitative data were analyzed using thematic analysis. Results: There were significant relationships between participants' nursing image scale total scores and their department (p < 0.001), education year (p = 0.014), age (p = 0.032) and desire to recommend the nursing profession (p < 0.001). Nursing image scale total score was significantly higher in nursing departments than in other departments. Second-year participants and 18–20-year-olds had higher total scores than fourth-year participants and 21–23-year-olds, respectively, and those who would recommend the nursing profession had higher total scores than those who would not recommend it (p < 0.05). Analysis of the qualitative data produced six main themes: perceptions of the nursing profession, perceived nursing figure, nurse knowledge, relationship with healthcare professionals, reason for preference and job gender. Conclusion: This study employed a mixed-method design involving both quantitative and qualitative stages. The results highlighted the image of nursing and its significance in the eyes of prospective healthcare professionals. Detecting nursing image early can increase professional training and improve the professional image of nursing. We should take into account the factors that negatively affect the image of nursing to plan nursing education better in the future.
AtıfScopus26WoS21OpenAlex25İncele - MakaleAçık Erişim2022Scopus SJRQ4Analysis and assessment of daily and seasonal photovoltaic heat island effect on Sekbandemirli rural region by local weather data records; [YEREL METEOROLOJIK VERI KAYITLARI ILE SEKBANDEMIRLI KIRSAL BÖLGESINDE GÜNLÜK VE MEVSIMSEL FOTOVOLTAIK ISI ADASININ INCELENMESI VE DEǦERLENDIRILMESI]
Demirezen, Emre; Ozden, Talat; Akinoglu, Bulent G.
Photovoltaic Power Plants have a considerable share among solar energy conversion technologies toward environmentally sustainable and economically feasible electricity production. However, when a rural region's land surface formed by natural soil types is covered by a Photovoltaic Power Plant (PVPP)'s dark-colored solar modules in large numbers, an artificial albedo (reflectivity) change is expected on that surface. Because of the heat exchange between these modules and the air surrounding them due to albedo alteration, the region's natural weather conditions may experience Photovoltaic Heat Island Effect (PVHIE) as a result of external and time-dependent air temperature oscillations caused by the warming-cooling cycles of solar modules. To observe and analyze a possible PVHIE trend, it has been conducting a field study project since October 2017 for a PVPP near the Sekbandemirli rural region in the Kutahya city of Turkey. The weather data, including air temperature and wind (direction and speed) at every 10-minute and hourly intervals, are collected by the three weather monitoring stations installed at the specific locations inside and outside the PVPP field. The plant's hourly average power output and module temperature data can also be monitored. After conducting statistical, correlational, and graphical analyses, the results show some temporal PVHI formations at the PVPP field center daily and on a seasonal basis. The plant center's air temperature tends to be warmer (up to the 6°C difference) during daytimes and colder (up to the (-3)°C difference) during nighttimes.
AtıfScopus1İncele - MakaleAçık Erişim2022Scopus SJRQ1Highly siderophile element and Os isotope systematics of the Cenozoic volcanic rocks from the Eastern Pontides, NE Turkey: Constraints on the origin and evolution of subcontinental mantle-derived magmas
Arslan, Mehmet; Temizel, İrfan; Ackerman, Lukáš; Yücel, Cem; Yazar, Emel Abdioğlu
The Cenozoic subalkaline to alkaline volcanic rocks from the Eastern Pontides Orogenic Belt (EPOB) in NE Turkey exhibit wide range of highly siderophile element (HSE) contents and Os isotope compositions that can be related to their mantle sources and parental melt evolution. Although some Eocene rocks show signs of late-stage modification, most of the studied volcanic rocks possess primary HSE and Os systematics. The Eocene volcanic rocks have largely variable PdN/IrN (~0.25–751), PdN/PtN (~0.25–87) and (187Os/188Os)i ratios (~0.113 to 0.51). The Miocene volcanic rocks have high PdN/IrN (~2.6–441), low PdN/PtN (~0.11–1.7) and radiogenic (187Os/188Os)i ratios ranging from ~0.166 to 0.52 while the Mio-Pliocene volcanic rocks show high PdN/IrN of ~7.2–29, low PdN/PtN (~1.2–2.7), and only mildly radiogenic (187Os/188Os)i values between ~0.132 and 0.177. Finally, the Quaternary volcanic rocks have low PdN/IrN (~2.3–3.6), PdN/PtN (~0.9–1.6) and radiogenic (187Os/188Os)i values ranging from ~0.133 to 0.194. Overall, the primitive mantle-normalized HSE patterns of the studied volcanic rocks are characterized by PPGE (Pt, Pd) and Re enrichment with respect to IPGE (Os, Ir, Ru). The variations in HSE and radiogenic Os isotope compositions of the relatively differentiated volcanic rocks indicate that crustal assimilation played active role in their parental melt evolution, especially in the Eocene and Miocene period. Besides, the obtained HSE data also suggest that the parental magmas of all the studied volcanic rocks were generated mainly in the S-saturated conditions. The temporal and spatial HSE and Os isotope variations observed in the studied Cenozoic volcanic rocks reflect the heterogeneity of the mantle source beneath the EPOB, which could be attributed to variations in response of different fluid/melt metasomatism of the underlying SCLM.
AtıfScopus12WoS11OpenAlex10İncele - MakaleAçık Erişim2022Scopus SJRQ1Performance evaluation of privatized ports by entropy based TOPSIS and ARAS approach
Gök-Kısa, A. Cansu; Çeli̇k, Pelin; Peker, İskender
Purpose: Ports are the key elements of maritime transportation, which is crucial for world trade. Approximately 180 port facilities are located in Turkey. After 2007, 5 of the ports, which are formerly owned by Turkish Republic Railways Administration (TRRA), are privatized. The aim of the study is to evaluate the performance of these privatized ports by multi-criteria decision-making (MCDM) approach. Design/methodology/approach: The application process is performed by a MCDM model. This model includes both criteria (dry bulk, liquid bulk, general cargo, container, RO-RO capacity, total port area, total berth, total berths length and depth) and alternatives (Mersin, Samsun, Bandirma, Iskenderun and Derince Ports). It determines the weights of the criteria by entropy and ranks the alternatives by ARAS and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) methods. Findings: The results of entropy, ARAS and TOPSIS methods are compared. According to these results, “container” is the most important criteria while Mersin port has the best performance. Originality/value: In the literature, most of the studies about this subject were analyzed by data envelopment analysis (DEA) and there are no studies had been taken into consideration ports that are owned by TRRA, in Turkey. Moreover, few of these studies used integrated MCDM models, and this is the first study that integrates entropy, ARAS and TOPSIS methods in this field.
AtıfScopus27WoS25İncele - MakaleAçık Erişim2022The effect of tourism and legalization policies on summer pasture in Turkey
Döner, Fatih
In Turkey, according to Pasture Law, land allocated for farmers to spend the summer with their animals, graze their animals and benefit from grass is defined as “summer pasture (yaylak in Turkish).” Summer pasture is of national importance for its biodiversity, landscape, cultural heritage and transhumance. However, especially after 1990s, the summer pasture areas have been extensively used in tourism activities in Turkey. By changing land use, the increasing tourism activities combined with legal uncertainties and the legalization policies have caused summer pasture areas transferred into built-up areas. The effect of the tourism and legalization policies on the land use changes in summer pasture areas was evaluated in this study. It was determined that Turkey's tourism and legalization policies have adverse effect on sustainable use of summer pasture areas. These policies aimed at economic development and solving property problems of rural areas caused new legal problems and expansion of built-up areas. A better land use policy and an effective control mechanism are necessary for the sustainable use of summer pasture areas.
AtıfScopus3WoS3OpenAlex5TR Dizin1İncele - MakaleAçık Erişim2022Scopus SJRQ4The multiple mediating roles of self-esteem and happiness in the relationship between loneliness and depression in Facebook and Instagram users
Türkmen, Osman Oǧulcan; Kavakli, Mehmet; Ak, Mehmet
Objective: Social media usage is increasing gradually and the websites that enable social interaction may influence people's loneliness and depression levels. The aim of the present research was to examine the multiple mediating roles of self-esteem and happiness in the relationship between loneliness and depression. Method: The study sample was composed of 409 Facebook and Instagram users. Data were collected by using personal information form, Beck Depression Inventory, Oxford Happiness Scale-Short Form, Rosenberg Self-Esteem Scale and UCLA Loneliness Scale. Correlation analysis was carried out to determine the relationship between variables. Multiple mediation analysis was conducted to determine the mediating roles of self-esteem and happiness in the relationship between loneliness and depression. Results: The results suggest that self-esteem and happiness, indeed, have mediating roles in the relationship between loneliness and depression, and multiple mediation models were found to be statistically significant. The frequency of accessing Instagram was positively associated with depression and loneliness. Facebook users had higher self-esteem levels compared to Instagram users. Discussion: In conclusion, the relationship between loneliness and depression was found to be significantly mediated by self-esteem and happiness. Increased frequency of access to Instagram every day was found to increases the level of depression and loneliness. Additionally, Instagram users were found to have lower self-esteem compared to Facebook users.
AtıfScopus3WoS3OpenAlex5TR Dizin1İncele - MakaleAçık Erişim2022Scopus SJRQ4Evaluation of Lower Extremity Muscles Shortness, Flexibility, and Hypermobility in Adults with Asymptomatic Sacroiliac Joint Dysfunction
Narin, Ayşe Neriman; Yazgan Dağli, Beyza; Vural Cömert, Aysun; Bahar, Betül; Özturan, Kutay Engin
Objective: (a) To investigate the presence of sacroiliac joint dysfunction in asymptomatic individuals and (b) to compare lower limb muscle shortness, flexibility of hamstring and erector spinae muscles, and hypermobility between subjects with and without asymptomatic sacroiliac joint dysfunction. Material and Methods: A total of 54 healthy young adults subjects were included in the study. The subjects were assessed with the sacroiliac joint diagnostic procedure. The seated flexion test, the standing flexion test, the Gillet test, and bilateral bony landmark examination were performed by an expert investigator. According to the positivity of at least 3 of these tests, the subjects were divided into 2 groups, the asymptomatic sacroiliac joint dysfunction group and the control group. The shortness of tensor fasciae latae and iliopsoas muscles was evaluated with the modified Ober test and the modified Thomas test. The straight leg raise test and fingertip-to-floor test were carried out for hamstring and erector spinae muscles flexibility, while hypermobility was assessed according to the Beighton criteria. Results: The asymptomatic sacroiliac joint dysfunction was diagnosed in 38% of healthy adults. There was no statistical difference in the shortness of tensor fasciae latae and iliopsoas muscles between the asymptomatic sacroiliac joint dysfunction group and the control group (P > 0.05). Similarly, there was no difference between the groups in terms of the hamstring and erector spinae muscles flexibility, and the Beighton scores (P > 0.05). Conclusion: This study emphasized that asymptomatic sacroiliac joint dysfunction might be seen in healthy young adults without the difference in shortness and flexibility in the lower extremity and hypermobility.
- MakaleAçık Erişim2022Scopus SJRQ2Investigation of biodegradability of doped composite oxide coated AZ91 alloy in blood plasma; [Katkili oksit kaplamasi büyütülen AZ91 alaşiminin kan plazmasi içerisindeki biyoçözünürlüǧünün incelenmesi]
Şüküroǧlu, Ebru Emine; Çelik, Ayşenur
Magnesium alloys; It is widely used in metallic biomaterials with its low toxic effect and biodegradability. Although these alloys help the formation of new tissues in the body, they provide great advantages over other metallic biomaterials due to their ability to dissolve from the body after the area of use has healed. However, due to their low corrosion resistance, they cause it to dissolve in the body before the treatment process is completed. This is the major disadvantage that limits the use of magnesium alloys. Various surface modification methods are applied to magnesium alloys in order to eliminate this disadvantage. Micro Arc Oxidation (MAO) method, which can provide a coating resistant to wear and corrosion, is one of the surface modification methods applied to improve the surface properties of magnesium alloys. In this study; Composite oxide coatings with Ag nanoparticle and Hydroxyapatite were grown by MAO method. Morphological properties of the coatings were determined by Scanning electron microscope and X-Ray Diffraction instruments. The antibacterial properties of Ag nanoparticle and HA doped composite oxide layer which were grown by MAO method and the biodegradability of the coated/uncoated materials in the blood plasma were investigated. As a result of the experiments, the development of bacterial activity in the sample coated by MAO was prevented by adding Ag nanoparticle and Hydroxyapatite to the electrolite solution. In addition, the biodegradation rate has been reduced by surface treatment on AZ91 Mg Alloy. As a result of the soaking test in blood plasma, it was determined that AZ91 Mg alloy protects itself against dissolution with a rate of approximately 89%.
AtıfScopus2WoS2OpenAlex2TR Dizin2İncele - MakaleAçık Erişim2022Scopus SJRQ2Consumers’ willingness to pay for traditional products with geographical indication: a case study on pestil from Gümüşhane, Turkey
Dogan, Nilgun; Adanacioglu, Hakan
The main purpose of this study is to analyze the willingness to pay (WTP) geographical indications (GI)-labelled pestil as a traditional product. Considering the data obtained from a survey conducted with 166 households in Gümüşhane, Turkey were used. Contingent valuation method was taken to determine WTP for GI-labelled pestil (dried fruit pulp). In order to find WTP price amounts Tobit model was used. Tobit model showed that individuals who were in the upper age group, have a high frequency of purchasing pestil, have a high level of knowledge about GI-labelled products, and consume GI-labelled products want to consume more. The average amount that consumers will be willing to pay for 1 kg of price bids ranging from 60-100 TRY has been determined as 68.74 TRY. While establishing a target market, those who are in the upper age group, have a high frequency of purchasing pestil, have a high level of knowledge and consume GI-labelled products should be taken into consideration. Since individuals with a high level of knowledge regarding GI-labelled products are willing to pay a higher amount of extra payment, it is recommended that marketers carry out promotional activities that will increase communute awareness for GI-labelled products.
AtıfScopus7WoS6OpenAlex9İncele - MakaleAçık Erişim2022Scopus SJRQ4Different spacer-arm attached magnetic nanoparticles for covalent immobilization of Jack bean urease
Gulesci, Nuri; Yucebilgic, Guzide; Yildirim, Deniz
Objectives: This study aims the covalent immobilization of Jack bean urease on Fe3O4 magnetic nanoparticles via glutaraldehyde (urease@MNPs-Si-Glu) and epichlorohydrin (urease@MNPs-ECH) spacer arms. Methods: The optimum pH and temperature, thermal, storage and reuse stability of free and immobilized urease preparations were investigated. Thermodynamics characterizations of free and immobilized urease preparations were also studied. Results: The free urease and both immobilized urease preparations showed maximal catalytic activity at pH 7.5. The free urease had a maximal catalytic activity at 50 °C, while the both immobilized urease preparations exhibited their maximal catalytic activities at 70 °C. The urease@MNPs-Si-Glu and urease@MNP-ECH showed 2.7- and 1.9-fold higher thermal stability than the free urease at 60 °C, respectively. The free urease remained 30% of their initial activity at 4 °C, while urease@MNPs-Si-Glu and urease@MNPs-ECH retained 72 and 60% of their initial activities at the same conditions. The urease@MNPs-Si-Glu and urease@MNPs-ECH preserved 53 and 52% of their initial activities, respectively for urea hydrolysis after 20 reuses. Conclusions: The urease@MNPs-Si-Glu and urease@MNPsECH may find a potential application area in urea hydrolysis.
AtıfScopus3WoS2OpenAlex3İncele - MakaleAçık Erişim2022Scopus SJRQ1Microwave decontamination process for hummus: A computational study with experimental validation
Son, Ezgi; Coskun, Eda; Ozturk, Samet; Bulduk, Kubra; Akpinar, Merve; Mert, Behic; Erdogdu, Ferruh
There has been an increasing demand for healthy snacks, and hummus is preferred as a plant-based product its rich protein content. Its increased consumption, on the other hand, has raised food safety issues with linkages to Listeria outbreak and a recent Salmonella related recall. These were observed in ready-to-eat hummus and indicated the requirement of further processing. Conventional thermal processes might require longer times with negative impact on the quality due to the high viscosity of hummus with its solid-like rheology. For an efficient process design, microwave (MW) processing might be considered with its volumetric heating feature. Therefore, the objective of this study was to present MW application for a decontamination process for hummus. For this purpose, a computational model was developed to determine the temperature change during the process. This model was validated using the experimentally obtained temperature data from samples processed in polystyrene petri dishes (60 g – 8.5 cm in diameter and 1.2 cm in height) in a lab-scale MW system. Color changes were determined, and changes in its viscosity were used to understand the variation in the rheological attributes. Hummus samples were also inoculated with Salmonella cocktail to ≈7–8 log10 CFU/g prior to the MW process, and 70 W MW processing for 5 min (to average temperature of 95.3 °C) resulted in >4 log cycle reduction. Changes in color and rheological attributes were not significant with rather limited mass losses, and these indicated the possible MW processing for hummus decontamination with the need of designing an industrial scale processing.
AtıfScopus11WoS7OpenAlex12İncele - Derleme MakaleAçık Erişim2022Scopus SJRQ4A Dimension of Child Emergency: Psychiatric Emergency and Nursing Approach; [Çocuk Acilin Bir Boyutu: Psikiyatrik Aciller ve Hemşirelik Yaklaşımı]
Aksoy, Bahar; Kahriman, İlknur
In recent years, there has been a significant increase in applications to pediatric emergency services. Psychiatric emergencies are one of the frequent applications made to pediatric emergency services. Psychiatric emergencies are the first places that children and families will go to, as a situation that applications urgent intervention. However, in cases that do not require emergency intervention, children and families should apply to psychiatry services, while most of the applications are made to emergency services. Psychiatric emergencies constitute 3-12% of the applications made to emergency services. Therefore, in this review, psychiatric emergencies, risk factors, incidence, identification and evaluation of psychiatric emergencies, specific psychiatric emergencies and nursing approach are discussed in this review.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2022Scopus SJRQ4Transmission of Cholera Disease with Laplacian and Triangular Parameters
Merdan, Mehmet; Bekiryazici, Zafer; Kesemen, Tulay; Khaniyev, Tahir
A mathematical model has been introduced for the transmission dynamics of cholera disease by GQ Sun et al. recently. In this study, we add Laplacian and Triangular random effects to this model and analyze the variation of results for both cases. The expectations and co-efficients of variation are compared for the random models and the results are used to comment on the differences and similarities between the effects of these probability distributions. The randomness of the model itself is also investigated through comparison of the random and deterministic outcomes.
AtıfOpenAlex1İncele - MakaleAçık Erişim2022Scopus SJRQ2The Dual Expression of Parallel Equidistant Ruled Surfaces in Euclidean 3-Space
Gür Mazlum, Sümeyye; Şenyurt, Süleyman; Grilli, Luca
In this study, we examine the dual expression of Valeontis’ concept of parallel p-equidistant ruled surfaces well known in Euclidean 3-space, according to the Study mapping. Furthermore, we show that the dual part of the dual angle on the unit dual sphere corresponds to the p-distance. We call these ruled surfaces we obtained “dual parallel equidistant ruled surfaces” and we briefly denote them with “DPERS”. Furthermore, we find the Blaschke vectors, the Blaschke invariants and the striction curves of these DPERS and we give the relationships between these elements. Moreover, we show the relationships between the Darboux screws, the instantaneous screw axes, the instantaneous dual Pfaff vectors and dual Steiner rotation vectors of these surfaces. Finally, we give an example, which we reinforce this article, and we explain all of these features with the figures on the example. Furthermore, we see that the corresponding dual curves on the dual unit sphere to these DPERS are such that one of them is symmetric with respect to the imaginary symmetry axis of the other.
AtıfScopus31WoS30OpenAlex30İncele