Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Bayram, Sinan(9)
- Ayata, Ümit(8)
- Can, Zehra(8)
- Dertli, Enes(8)
- Esmer, Yusuf(8)
- Kaya, Yunus(8)
- Semerci, Vahide(8)
- Akyol Özcan, Kübra(6)
- Kara, Yakup(6)
- Maden, Sedat(6)
- Şahin, Engin(6)
- Bilgin, Yusuf(5)
- Dirican, Ebubekir(5)
- Ertugrul, Mehmet(5)
- Gülden, Bahadır(5)
- Gıdık, Betül(5)
- Imamoglu, Ilyas Kays(5)
- Kaplan, Kadir(5)
- Kaya, Musa(5)
- Koçak, Lokman(5)
- Kutlu, Naciye(5)
- Sönmez Sarı, Ebru(5)
- Ünalan, Ozlem(5)
- İspirli, Hümeyra(5)
- Ates, Fatih(4)
- Bulut, Mehmet(4)
- Bülbül, Ali Savaş(4)
- Ecem Bayram, Nesrin(4)
- Gökçe, H.S.(4)
- Gültekin, Ömer Faruk(4)
- Kadakal, Huriye(4)
- Kahveci, Hakan(4)
- Kamiloğlu, Aybike(4)
- Kaya, Metin(4)
- Kırbaş, Zila Özlem(4)
- Teber, Ahmet(4)
- Uzunçakmak, Sevgi Karabulut(4)
- Uğur, Uçar(4)
- Yilmaz, Sevda(4)
- Öztürk, Mesut(4)
Yayınlar
- MakaleAçık Erişim2023Scopus SJRQ2Cheaper, Wide-Band, Ultra-Thin, and Multi-Purpose Single-Layer Metasurface Polarization Converter Design for C-, X-, and Ku-Band Applications
Kaya, Yunus
This article presents the design of wide-band, ultra-thin, and multi-purpose polarization converter utilizing metasurface for C-, X-, and Ku-band applications. Having a topology on a FR-4 substrate with metasurface metallic patterns on the front and an all-metallic surface finish on the back, the unit cell of converter design has symmetry in the (Formula presented.) plane with unique features of having both linear polarization (LP) and circular polarization (CP) property. While the polarization conversion ratio (PCR) of converter in normal incidence case is more than 90% in three different frequency bands of 6.46–6.78 GHz, 10.52–11.85 GHz, and 16.49–17.37 GHz, it shows linear-to-linear polarization feature and a linear-to-circular polarization feature with left-handed circular polarization (LHCP) for the frequency range between 7.28 and 9.40 GHz and right-handed circular polarization (RHCP) for the frequency range between 13.38 and 15.19 GHz. It is also seen that the converter has a PCR value of around 90% for oblique incidence case with incidence angles up to 45 (Formula presented.). Extensive simulations have been conducted to prove the performance of suggested converter with the aid of a commercially-available simulation platform, called CST Microwave Studio. The advantages of suggested polarization converter are low-cost, wide-band, ultra-thin, and having both LP and CP conversion in C-, X-, and Ku-bands.
AtıfScopus13WoS10OpenAlex15
İncele - MakaleAçık Erişim2023Scopus SJRQ2Dynamic response of polypropylene honeycomb/polystyrene foam core sandwich composite panels: Experimental and numerical analysis
Caliskan, Umut; Demirbas, Munise Didem; Erdogan, Omer
In this study, dynamically loaded sandwich panels with two different core materials and face sheets made of aluminum alloys (6061-T6) were investigated experimentally and numerically under low-velocity impact. Polypropylene, PP (C3H6)n honeycomb and extruded polystyrene foam, XPS (C8H8)n were preferred as core material. By using the contact force and kinetic energy changes, which were the impact test results of the sandwich panels, the contact and impact resistance was examined. As a result of the tests, damaged regions and permanent central displacement were determined and energy absorption capabilities were demonstrated for two different structures. The results obtained were compared with the results obtained by the open finite element method. In this study, it was shown that the face-sheet thickness of sandwich panels was an important parameter affecting the impact behavior. The behavior of the core material when the face-sheet loses its rigidity was investigated and it was found that polystyrene foam was more effective in preventing impact damage. However, it was found that using the PP honeycomb or XPS was affected the impact behavior in different points.
AtıfScopus10WoS10OpenAlex12İncele - MakaleAçık Erişim2023Scopus SJRQ2Artificial intelligence literacy teaching in social studies education
Yetişensoy, Okan; Rapoport, Anatoli
The increasing role of artificial intelligence (AI) in daily life has led to the emergence of numerous skill sets associated with AI. AI literacy, which is becoming an important citizenship competence, has become a skill that has gained importance in recent years. It is thought that the aim of social studies to prepare students as active citizens of today and the future has made AI literacy a direct subject of social studies education. However, the literature on the relationship between social studies and AI literacy is still scarce. This study aims to explore the relationship between social studies and AI literacy and to discuss the potential role of social studies in teaching AI literacy. In this direction, the concept of AI is defined, and the teaching of AI literacy in education is examined; the teaching of this literacy within the scope of social studies is discussed, and an example of a hands-on activity-supported lesson plan, which can be used in social studies classes, is presented. This study is important in terms of pointing out the potential role of social studies in AI literacy teaching.
AtıfScopus41OpenAlex57İncele - MakaleYalnız künye2023Scopus SJRQ2Comparative evaluation of different drying techniques for beef meat
Kamiloğlu, Aybike; Elbir, Tuğba; Dölek, Muzaffer; Eşrefoğlu, Emine Sedanur
The study aimed to evaluate the influence of different drying techniques (Convective and microwave drying) on beef meat's drying kinetics and color parameters. While drying rates with convective drying vary between.005 and.009 g water/g dry matter, it varies between.014 and.166 g water/g dry matter for microwave drying. Among the model proposed, for the conditions applied in the microwave and convective drying methods, the Midilli model gave a better fit. The Arrhenius-type equation calculated the activation energies of beef samples. Activation energies were 64.15 and 449.86 kJ/mol for convective and microwave drying, respectively. According to measured L*, a*, and b* values and calculated ΔE, C*, and h° values, convective drying at 80°C provided the closest color characteristics to fresh meat. Practical applications: Beef is a perishable food and storage conditions are very important. It is important to have information about the drying methods to be applied in the preservation of these foods in terms of process control. In this study, microwave drying and convective drying methods were examined and it was shown that microwave drying, which is one of the drying methods, shortens the processing time. However, in the convective drying method, color properties similar to the fresh product are provided. This research can provide theoretical guidance for further processing and preservation.
AtıfScopus7WoS7OpenAlex7İncele - MakaleAçık Erişim2023Analysis of occupational health and safety risks in beekeeping with fmea method
Özdemir, Mustafa; Kökhan, Serhan
Contrary to popular belief, beekeeping, which dates back to prehistoric times and is one of the most important plant and animal production branches today, is not an innocent profession in terms of occupational health and safety. In this study, in order to determine the occupational health and safety risk factors in the beekeeping profession, Interviews with beekeepers were conducted in 10 apiaries operating in Bayburt, where especially wandering beekeeping is practiced. In light of the data obtained from the danger hunt applied by the occupational health and safety specialist, ergonomic, physical, biological, and chemical risks were revealed using the FMEA risk analysis method. The effect, probability, and detection values were found for each failure mode, and then Risk Priority Number values were calculated. As a result of the study, for the five basic stages of beekeeping, 15 processes, 39 failure modes, 72 potential effects, and 39 failure causes were determined. Failure modes with a Risk Priority Number value of 100 and above were evaluated as “situations where urgent action and axiom should be taken,” and preventive axioms were proposed for each relevant failure mode. The number of studies on the risk factors in the beekeeping profession is very limited in the literature. For this reason, it is predicted that this study will fill an important gap in the related field and make significant contributions to the literature.
AtıfScopus3OpenAlex3
İncele - MakaleAçık Erişim2023Scopus SJRQ4Theoretical Investigation of (E)-1-(2,4-Dichlorophenyl)-3-[4-(morpholin-4-yl)phenyl]prop-2-en-1-one Molecule As a Possible Potential COVID-19 Drug Candidate: Molecular Docking and DFT Calculations
Ekíncíoğlu, Yavuz
Abstract: In this study, a potential new drug to fight against the COVID-19 virus, (E)-1-(2,4-dichlorophen-yl)-3-[4-(morpholin-4-yl)phenyl]prop-2-en-1-one molecule has been investigated via computational assessment and molecular docking approach. From the conformer analysis and optimization, the most stable structure is determined. For this structure, geometrical parameters, Frontier molecular orbitals analysis, chemical reactivity descriptors, nonlinear optical properties, natural bond orbital, mulliken population analysis, molecular electrostatic potential map and thermodynamic properties of molecule were calculated with standard functional at the B3LYP/6-311++G(d,p) method. The geometric parameters (bond lengths and bond angles) are in good agreement with the experimental values available in the literature. The stability, structural and electronic properties obtained for the molecule can be a significant contribution to the future experimental and theoretical studies. The molecular docking mechanisms between the molecule and 7ALI protein points out that the protein-ligand systems are hydrogen bonding, π-stacking, and hydrophobic interactions.
AtıfScopus4WoS4OpenAlex5İncele - MakaleAçık Erişim2023Scopus SJRQ2The Toughness of Polypropylene Fiber-Reinforced Foam Concrete under Various Uni- and Tri-Axial Compression Loads
Gökçe, H.S.; Öksüzer, N.; Kamiloğlu, H.A.; Eyüboğlu, M.; Yılmaz, F.
Foam concrete has recently become a key construction material in terms of meeting the special needs of modern engineering applications such as thermal insulation, absorption of static and dynamic loads. In this study, the effect of polypropylene fiber content and various uni- and tri-axial compression loads on the toughness response of polypropylene fiber-reinforced foam concrete was investigated. Up to a certain strain level (0.1 mm/mm), the ultimate compression stress of specimens under uni- and tri-axial loading increased from about 1 MPa to 16 MPa with the increased target densities of foam concrete. There was a strain-hardening capability of low-density foam concrete while the specimens failed by strain-softening in the high-density series. The optimum fiber amounts were found to be 3.9%, 4.6%, and 6.4% for low, medium, and high target densities of foam concrete, respectively. At low-density series, the bubbles were observed to be relatively bigger and mostly merged with each other. A reduction in foam content (vice versa, increasing target density of mixture) and the presence of fiber resulted in smaller pore size and a more homogenous distribution of them in the matrix. In conclusion, the desired pore structure and efficient bridging of fibers in the matrix allowed the production of favorable foam concrete with higher toughness.
AtıfScopus14WoS10OpenAlex14İncele - MakaleYalnız künye2023Exergetic Analyses of Hypersonic Flows
Topal, Esra Nur; Karaali, Rabi
Hypersonic devices and vehicles and hypersonic flows are very important and competitive advanced technology in science and in the World. Hypersonic technology is rapidly spreading and turning into competition in developed countries, especially in space studies and defense industry. This technology is vital for developed countries. Because of shock waves emerging in hypersonic devices during hypersonic flow, the energy and exergy destructions they cause are the most important difficulties, obstacles and problems which arise in this vital technology. To overcome these problems and difficulties, to prevent or reduce or minimize energy and exergy destruction, aerodynamic analysis and energy and exergy analysis methods are applied. The data and the results that can be guiding and useful for the calculations and the design have been obtained. In this study optimal design and optimum calculations ways of the energy and exergy destructions of hypersonic devices and instruments are discussed. It is obtained and shown that how much exergy destruction and entropy production occurs at which altitude and hypersonic velocities and also at which oblique shock angles.
AtıfScopus2İncele - MakaleAçık Erişim2023Scopus SJRQ2The Effect of Different Drying Methods on Bioactive and Nutrition Contents of Bee Bread and Mathematical Modeling of Drying Characteristics
Kutlu, Naciye; Gercek, Yusuf Can; Bayram, Nesrin Ecem
In this study, the aim was to determine the effect of different drying methods (with microwave and hot air) on the color, nutrient and bioactive contents of fresh bee bread. Drying characteristics were also investigated. Microwave and hot air drying were applied at different microwave powers and temperatures, respectively. Lower moisture ratios and highest effective diffusion coefficients were obtained with microwave drying in a shorter time. The Midilli model was found to be the most suitable thin-layer drying model for both methods. Regardless of the drying conditions, moisture, ash, protein, carbohydrate, and lipid proportions were observed to vary in the ranges of 4.9–8.2 %, 1.61–2.67 %, 17.47–32.54 %, 39.92–60.84 %, and 7.10–8.89 %, respectively. The lowest color difference was obtained for the sample dried at 210 W. As a result, it was determined that microwave drying is more suitable for preserving the nutritional and bioactive content of bee bread during drying.
AtıfScopus5WoS3OpenAlex6
İncele - MakaleAçık Erişim2023Scopus SJRQ3Investigation of Use of Linden (Tilia tomentosa Moench.) Wood with UV System Varnish Application IN INDOOR Parquet Flooring
Ayata, Ümit; Esteves, Bruno; Domingos, Idalina; Ferreira, José; Tuncay Efe, Fatih; Türk, Mutlu; Çakicier, Nevzat; Gürleyen, Levent; Peker, Hüseyin
Linden wood is used in the making of musical instruments, agricultural hand tools, and in the furniture sector. In this study, the changes in glossiness (parallel (//) and perpendicular (⊥) to the fibers at 20°, 60°, and 85°, the pull-off adhesion test, color parameters (CIEL) and pendulum hardness (König method) of two different UV curable varnishes applied to linden (Tilia tomentosa Moench.) according to industrial application techniques and exposed to artificial weathering were investigated. According to the research results, while L*, ΔH*, and h° decreased with increasing weathering time in both varnish layers, ΔC*, b*, ΔE*, a*, and C* rose. The pendulum hardness grew for Method B but dwindled for Method A. A decrease was found in the adhesion tests for both varnish methods after artificial weathering. The glossiness was generally reduced due to artificial weathering for all the angles and for both directions, with the exception of 85º in Method A. The variance analysis and homogeneity groups showed that the changes in the adhesion, pendulum hardness, L*, a*, h°, C*, perpendicular and parallel to the fibers for 60° and 85° were found to be significantly different with artificial weathering for both methods.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2023Scopus SJRQ1Attitudes pregnant women in Türkiye towards holistic complementary and alternative medicine and influencing factors: a web-based cross-sectional study
Küçükkaya, Burcu; Işık, Hafsa Kübra
Background: Pregnant women turn to holistic complementary and alternative medicine to cope with problems associated with the changes they experience during pregnancy. This study aimed to determine the attitudes of pregnant women in Türkiye toward holistic complementary and alternative medicine and influencing factors. Methods: This cross-sectional exploratory study was carried out between June and November 2022 with a web-based questionnaire distributed via social media and communication platforms. Two hundred and twenty-one pregnant women participated in the study. A "Participant Identification Form" and the "Attitudes towards Holistic Complementary and Alternative Medicine Questionnaire" were used to collect the data. Logistic regression analysis was used to determine correlations between variables and scale scores. Results: It was determined that 84.2% of the participants had knowledge about traditional and complementary therapies, and 77.8% used traditional and complementary therapies. The participants reported that they preferred faith (77.4%), energy healing (76.9%), massage (75.6%), diet (74.2%), meditation/yoga (62.0%), and herbal (59.7%) traditional and complementary therapies the most, and most of them used these methods to reduce nausea, vomiting, edema, and fatigue during pregnancy. The mean Attitudes towards Holistic Complementary and Alternative Medicine Questionnaire score of the participants was 35.0 (5.04). It was seen that having high school or higher education (p < 0.05), having an income more than expenses (p < 0.001), having received advice from nurses when having a complaint (p < 0.001), having knowledge about traditional and complementary therapies (p < 0.001), and being a practitioner who received services of traditional and complementary therapies (p < 0.001) were positively associated with the utilization of traditional and complementary therapies. Conclusion: In this study, it was determined that the attitudes of pregnant women towards holistic complementary and alternative medicine were high. Their personal characteristics, as well as their knowledge and practice of holistic complementary and alternative medicine affected their attitudes towards holistic complementary and alternative medicine. Obstetrics nurses/midwives should actively participate in training programs on traditional and complementary therapies focused on pregnant women.
AtıfScopus10WoS5OpenAlex9İncele - MakaleYalnız künye2023Scopus SJRQ3Comparison of the critical power estimated by the best fit method and the maximal lactate steady state; [Comparaison entre la puissance critique estimée par la méthode bien-être et l’état d’équilibre maximal du lactate]
As, H.; Cabuk, R.; Norouzi, M.; Balci, G.A.; Ozkaya, O.
Aims: Maximal lactate steady state (MLSS) is accepted as the gold standard method to determine the upper boundary of heavy exercise domain, while critical power (CP) is one of the most practical ways to estimate the lower boundary of severe exercise domain. However, it has been recently discussed that the upper boundary of heavy-intensity exercise domain does not equal to lower boundary of severe-intensity exercise domain. Conversely, the best individual fit method (CPfit) has recently been suggested as an accurate estimation of CP. However, there has not been a comparative evaluation of CPfit versus MLSS. The aim of this study was, therefore, to focus on the comparison of CPfit with MLSS. Methods: Eleven well-trained male cyclists participated in this study. Following the determination of maximal oxygen uptake, MLSS was determined through the performance of standard 30-minute constant work rate exercises performed on separate days. Cyclists performed four constant-load exercises lasting 2–15 minutes on different days. The data were then fitted to mathematical models to obtain CPfit. Bland-Altman plot with 95% limits of agreement (LoA) was used to measure agreement between CPfit and MLSS. Results: According to the findings, CPfit overestimated the work rate corresponding to MLSS (300 ± 38 W vs. 265 ± 39 W; P = 0.001; effect size = 3.28). Bland-Altman results showed high LoA (14 to 55.9 W) and very high bias (bias = 35 ± 10.7 W; P = 0.001; r: 0.96) between CPfit and MLSS. Conclusion: CPfit was not identical for MLSS.
AtıfScopus1WoS2OpenAlex3İncele - MakaleYalnız künye2023Scopus SJRQ1Comparison of bioactive constituents by HPLC–DAD–ESI-MS and UFLC and in vitro antioxidant activities of blossom honey, bee pollen, and propolis
Saroğlu, Öznur; Ecem Bayram, Nesrin; Özçelik, Beraat
The aim of this study was to analyze the total phenolic content, phenolic profile, and antioxidant activity of honey, bee pollen, and propolis samples from Turkey's Black Sea Region. The total phenolic content of these bee products was found using Folin–Ciocalteu's method, and their antioxidant capacity was found using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and cupric ion reducing antioxidant capacity (CUPRAC) assays. Phenolic compounds of honey samples were characterized by high-performance liquid chromatography coupled to a photodiode array detector and mass spectrometer (HPLC–DAD–ESI-MS), while phenolic compounds of bee pollen and propolis samples were quantified ultra-fast liquid chromatography (UFLC). The total phenolic values for honey, bee pollen and propolis were 6.32–18.21 mg GAE/100 g, 547.64–769.4 mg GAE/100 gr, and 6096.1–11,564 mg GAE/100 gr, respectively. DPPH and CUPRAC values of honey, pollen and propolis were 11.05–21.38% and 0.38–1.48 µmol Trolox/g; 24.67–38.63% and 0.03–0.05 mmol Trolox/g; 11.81–34.12% and 0.47–0.89 mmol Trolox/g, respectively. About 30 different phenolic compounds were identified as quantitative. Our findings have shown that all bee products examined in the study are found to contain gallic acid, naringenin, and caffeic acid. In terms of total phenolic content and antioxidant activity, the bee product extracts were ranked as follows: propolis > bee pollen > honey. The high concentration of phenolic compounds in propolis explains its remarkable antioxidant effect.
AtıfScopus10WoS10OpenAlex10İncele - Kitap BölümüYalnız künye2023Metasurfaces
Kaya, Yunus
The purpose of this book chapter is to ensure an extensive and appropriate definition of MSs, to determine their outstanding features, and also to emphasize some of the advantages that may be gained by using them. A superior property of MSs is their low loss behavior in contrast to MMs. Therefore, MSs permit us to use the extraordinary properties of MMs such as refraction and reflection without incurring production complications and the losses related to MMs.
- MakaleAçık Erişim2023Scopus SJRQ1Investigation of student experiences with ChatGPT-supported online learning applications in higher education
Kayalı, Bünyami; Yavuz, Mehmet; Balat, Şener; Çalışan, Mücahit
The purpose of this study was to determine university students' experiences with the use of ChatGPT in online courses. The sample consisted of 84 associate degree students from a state university in Turkey. A multi-method approach was used in the study. Although quantitative data were collected using the Chatbot Usability Scale, qualitative data were collected using a semi-structured interview form that we developed. The data were analysed using descriptive and content analysis methods. According to the findings, ChatGPT exhibits advantages such as a user-friendly interface and fast, concise, relevant responses. Moreover, emphasizing its contribution to the learning process, the information provided was sufficient and topic-oriented. The understandability of the chatbot’s functions and the clarity of their communication were emphasized. However, there are disadvantages such as performance issues, frequency of errors and the risk of providing misleading information. Concerns have also been raised about the potential difficulties chatbots may face in ambiguous conversations and providing insufficient information on privacy issues. In conclusion, ChatGPT is recognised as a potentially valuable tool in education based on positive usability impressions; however, more research is needed for its safe use. Implications for practice or policy • Based on positive usability impressions, students and instructors can use ChatGPT to support educational activities. • ChatGPT can promote and enhance students' personalised learning experiences. • ChatGPT can be used in all higher education courses. • Users should be cautious about the accuracy and reliability of the answers provided by ChatGPT. • Decision-makers should take precautions against risks such as privacy, ethics, confidentiality and security that may arise from using artificial intelligence in education.
AtıfScopus79WoS48OpenAlex76İncele - MakaleAçık Erişim2023Scopus SJRQ2Relation of ATPase6 Mutations and Telomere Length in Schizophrenia Patients
Uzuncakmak, Sevgi Karabulut; Dirican, Ebubekir; Ozcan, Halil; Takim, Ugur
Objective: Schizophrenia is a serious mental disorder. Mutations in mitochondrial genes can change energy metabolism. Telomere is a tandem sequence at the end of chromosomes. Shorter telomere length has been shown in schizophrenia. The aim of this study was to determine the relationship between ATPase6 gene mutations and telomere length in schizophrenia patients. Methods: Blood samples of 34 patients and 34 healthy controls were used. In this study conventional PCR, Sanger sequencing technic and real-time PCR were utilized. Results: Five different mutations (A8860G, A8836, G8697A, C8676T, and A8701G) in the ATPase6 gene were identified in schizophrenia patients. The most seen mutation was A8860G (94%). Telomere length analysis indicated the relation of ATPase6 gene mutations and telomere length variations (p = 0.001). Patients carrying the A8860G mutation had shorter telomere lengths than patients carrying other mutations. Comparing telomere length between schizophrenia patients and healthy controls revealed that the mean telomere length of schizophrenia patients was shorter than healthy controls (p = 0.006). The demographic analysis demonstrated a significant relationship between marital status and telomere length (p = 0.011). Besides that, the duration of the illness is another factor that impacts telomere length (p = 0.044). There is no significant relation between telomere length and other clinical and demographic characteristics including education status, age, gender, etc. Conclusion: In conclusion, telomere length and ATPase6 gene mutations have a significant relation. Studies with larger patient populations and investigation of other mitochondrial gene mutations will make the clearer link between telomere length and mitochondrial mutations.
AtıfScopus4WoS3OpenAlex4İncele - Kitap BölümüYalnız künye2023Information ethics in the context of current developments
Esmer, Yusuf; Aribaş, Ayşe Nihan
The emergence of globalization due to information technologies and the changes and/or developments brought about by globalization require organizations to have more knowledge about ethics and therefore to be more interested in this issue. The use of information and communication technologies in organizations in accordance with ethical values is considered important in terms of the integrity, functioning, and efficiency of both employees and organizations. Individuals, managers, organizations, and researchers have important duties in the field of information ethics in order to prevent the making of difficult mistakes that will adversely affect individuals and organizations during the use of information technologies. In this context, information ethics has been examined in this study in the context of recent developments all over the world, especially the developments in the global COVID-19 pandemic process.
- MakaleAçık Erişim2023Scopus SJRQ2Investigation of the effects of changes in formulation and cooking times on the quality parameters in the production of goji berry leather
Maraş, R. Talay; Erdoğan, U.
Goji berry (Lycium barbarum L.) is described as a food with several health benefits. This valuable fruit has been processed into fruit leather, which is one of the important traditional products. This study allowed us to determine the effect of changing formulations (starch and flour) and cooking times (10, 15, and 20 min) on quality criteria during goji berry leather production. The goji berry leather samples exhibited the following characteristics: pH values ranging from 4.96 to 4.99, titration acidity values spanning from 2.97% to 3.23%, dry matter content within the range of 84.78% to 87.69%, ash content between 3.12%, and 4.27%, water activity (aw) values ranging from 0.37 to 0.38, protein content between 14.71%, and 15.66%, HMF content varying from 17.33 mg/kg to 34.51 mg/kg, total phenolic content ranging from 7.14 µg GAE/g to 7.89 µg GAE/g, total sugar content falling between 61.18%, and 63.89%, reducing sugar content within the range of 60.13% to 61.89%, sucrose content ranging from 0.91% to 2.25%, thickness values ranging from 0.74 mm to 0.89 mm, hardness values varying between 17.09, and 33.27, stickiness values within the range of 4.10 to 23.34, cohesiveness values from 0.85 to 1.00, elasticity values ranging from 0.88 to 0.97, chewability values spanning from 12.85 to 30.85, L* values ranging from 27.27 to 32.66, a* values between 8.62, and 10.32, b*values varying from 7.06 to 8.59, C* values within the range of 11.15 to 12.81, and H° values falling between 39.31, and 41.13. Following the sensory evaluation of leather samples, it was determined that the color score ranged from 3.80 to 4.27, the smell score fell between 3.53 and 4.00, the taste score varied from 2.93 to 4.00, the mouthfeel score ranged from 2.93 to 3.93, and the general acceptability score was found to be within the range of 3.27 to 4.20. It was determined that cooking time and additional additives affect some quality values of the goji berry leather.
AtıfScopus1WoS1İncele - MakaleAçık Erişim2023Scopus SJRQ2Evaluation of IGFBP5 expression and plasma osteopontin level in COVID-19 patients
Karabulut Uzunçakmak, Sevgi; Aksakal, Alperen; Kerget, Ferhan; Aydın, Pelin; Halıcı, Zekai
Purpose: The aim of this study is to investigate insulin-like growth factor binding protein 5 (IGFBP5) expression in coronavirus disease 2019 (COVID-19) patients and its relationships with COVID-19 laboratory findings and plasma osteopontin (OPN) levels. Materials and methods: We enrolled 60 patients with COVID-19 and 30 healthy individuals in this study. mRNA expression of IGFBP5 was measured by RT-PCR. Plasma OPN levels were measured via the ELISA method. Results: Plasma OPN levels were higher and IGFBP5 expression levels were lower in COVID-19 patients than in the healthy individuals (p = 0.0057 and p = 0.0142, respectively). Critically ill patients had higher OPN and lower IGFBP5 than non-critically ill patients. Patients with affected lungs demonstrated increased OPN and decreased IGFBP5 (p = 0.00032 and p = 0.044, respectively). Receiver operating characteristic (ROC) analysis indicated that IGFBP5 expression and OPN levels can be used discriminate non-critically from critically ill patients (p = 0.049; p = 0.0016, respectively). Conclusion: This study demonstrated that patients with a poor prognosis had increased OPN and decreased IGFBP5. High values of OPN and low values of IGFBP5 may be considered as signs of disease severity. Tissue-specific IGFBP5 expression may contribute to understanding the role of IGFBP5 in the lungs in COVID-19 cases.
AtıfScopus6WoS6OpenAlex6İncele - MakaleYalnız künye2023Scopus SJRQ1Nectar honey from Turkey: crystallization and physicochemical profile
Ecem Bayram, Nesrin
Honey is a traditional food used by humans due to many therapeutic properties. Turkey is in a good position for the production of bee products, and honey is the most popular bee product in the country. In this study, the aim was to evaluate the quality parameters of 40 honey samples based on physicochemical parameters and to gain information about speed of crystallization. For this purpose, moisture (%), fructose (%), glucose (%), fructose + glucose (F + G, %), fructose/glucose (F/G), glucose/moisture (G/M), and proline (mg/kg) contents were determined in honey samples and cluster analysis was performed. When the sugar profile of honey samples is examined, F + G was 61.63–78.03%, F/G was 0.99–1.25, moisture content was 14.9–19.1%, and proline content was 384.41–1271.56 mg/kg. These results comply with national standards. Honey samples tend to crystallize quickly when their crystallization properties are evaluated based on F/G and G/M ratios. Consequently, the quality of honey differs according to the region from which it is produced and it is natural for honey to crystallize.
AtıfScopus4WoS3OpenAlex6İncele