Meslek Yüksek Okulları / Vocational Schools
Permanent URI for this communityhttps://hdl.handle.net/11727/1410
Browse
6 results
Search Results
Item Optimization Of Spray-Drying Process Parameters For Microencapsulation Of Three Probiotic Lactic Acid Bacteria Selected By Their High Viability Rate In Sucrose And Fructose Levels And High Temperatures(Başketn Üniversitesi Kazan Meslek Yüksekokulu, 2024-05-05) Bagdat, Elif Seyma; Akman, Perihan Kubra; Kutlu, Gozde; Tornuk, FatihMicroencapsulation is an efficient way to increase the survival rate of probiotics against harsh conditions. In this study, three probiotic strains (Lactiplantibacillus plantarum subsp. plantarum strain W2 (LP4), Lactiplantibacillus pentosus strain XL640 (LPE1), and Limosilactobacillus fermentum strain W8 (LF2)), isolated from shalgam and gilaburu, were microencapsulated with spray drying and process conditions [maltodextrin concentration (MC, 10-30%) and inlet air temperature (IAT, 110-130 degrees C)] were optimized by central composite rotatable design of response surface methodology. The results indicated that the predicted IAT and MC values for the maximum powder yield and viability were 123.21 degrees C and 22.76%, 130.37 degrees C and 19.49%, and 127.94 degrees C and 10.00% for LF2, LP4 and LPE1, respectively. At these conditions, bacterial viability ranged from 10.27 to 10.33 log colony-forming units per gram (cfu/g), while the powder yield values for the encapsulation of the bacteria were between 43.38% and 50.97%. Furthermore, MC was the most significant factor for the powder yield of LF2, LPE1, and viability of LPE1. Encapsulation efficiency values higher than 92.77% demonstrated the efficiency of spray drying for the protection of selected strains. The microcapsules produced at the optimum points had moisture content between 5.30 and 5.96%. SEM images showed that the microcapsules were in spherical shape. In conclusion, the results confirmed that the selected probiotics were successfully microencapsulated with spray drying with high powder yield, viability, and encapsulation efficiency levels and these features could reveal the potential of the encapsulated probiotic strains to be used in high-sugar foods.Item Esra (Elevator Simulation, Research & Analysis): An Open-Source Software Tool For Elevator Traffic Simulation, Research, And Analysis(Başkent Üniversitesi Teknik Bilimler Meslek Yüksekokulu, 2024-04-05) Tartan, Emre Oner; Ciflikli, CebrailToday, although elevator companies typically have their own elevator simulation and analysis tools, these remain inaccessible to the public due to commercial concerns and rivalry in the sector. Consequently, due to the lack of modular open-source software tools, interest in the design and development of elevator systems in academia is quite limited, contrary to the vast potential of the field. This paper addresses this gap introducing an open-source software tool, the Elevator Simulator for Research and Analysis (ESRA), developed using the MATLAB programming language and an object-oriented approach. ESRA features built-in control methods, and visualization options with the capability to save and reuse traffic data, facilitating in-depth comparative analysis. Moreover, its modular architecture allows a design and development basis for further research in the field. The proposed software aims to enable developers to design, implement, analyse, and compare their control algorithms with other methods.Item The Frequency Dependent of Main Electrical Parameters, Conductivity and Surface States in the Al/ (%0.5 Bi:ZnO)/p-Si/Au (MIS) Structures(Başkent Üniversitesi Teknik Bilimler Meslek Yüksek Okulu, 2024-03-09) Cetinkaya, H. G.; Bengi, S.; Durmus, P.; Demirezen, S.; Altindal, S.The capacitance/conductance-voltage-frequency (C/G-V-f) features of the Au/p-Si structures with (%0.5 Bi-doped ZnO) interlayer grown by spin-coating technique was investigated between 100 kHz and 1 MHz. The C-2-V curves that depend on frequency were used to determine the electrical-parameters like diffusion-potential (V-D), Fermi-energy level (E-F), barrier-height (Phi(B)), and depletion-layer (W-D) thickness. The value of Phi(B) was found to increase with increasing frequency due to the decrease in surface-states (N-ss) effects on the C-V characteristics. Voltage dependent series-resistance (R-s) was obtained by using Nicollian-Brews method for each frequency and it decreased with increasing frequency. Both the low-high frequency capacitance (C-LF-C-HF) and Hill-Coleman techniques were used to determine the voltage-dependent profile of N-ss. While N-ss decreases with increasing frequency, voltage-dependent on them give two distinctive peaks due to a special distribution of them at interlayer/semiconductor interface in the bandgap depending on their relaxation time. All these experimental results indicate that the existence of R-s, N-ss, and interlayers considerably influence the impedance measurements.Item Comparison Of Efficacy And Reliability Of Six Commercial Covid-19 Diagnostic PCR Kits(Başkent Üniversitesi Kazan Meslek Yüksek Okulu, 2024-03-26) Sharafi, Parisa; Gokdemir, F. Seyma; Akyol, Mesut; Ardicoglu-Akisin, Yasemin; Gocmen, J. Sedef; Taylan-Ozkan, AysegulObjectives. All countries have been deeply affected by the coronavirus disease 2019 pandemic, both economically and in situations that strain health systems, such as workforce and workload. Therefore, various measures should be taken to control the disease and prevent its spread. Since the disease onset, real-time PCR tests have been used as the gold standard for disease diagnosis. Owing to the rapid progress of the pandemic and the spread of the disease, validation, consistency, and optimization tests of some commercial kits have been conducted directly in the field. Therefore, it is important to compare the results of these kits and improve the existing ones. Methods. We compared five kits (Bioexen, Polgen, Coronex, Diagen, and Anatolia) donated to the TOBB Economics and Technology University Hospital PCR laboratory with the KrosGen kit to detect severe acute respiratory syndrome coronavirus 2. A total of 244 samples were selected and analyzed using five different severe acute respiratory syndrome coronavirus 2 PCR detection kits. Results. Positive and negative results from the six kits were compared using the working protocols of the kits, primers, and cycle threshold (Ct) values. Five of the six kits have reliable compatibility for Ct<30 but decreases for Ct >= 30. Therefore, it is important to evaluate the performance of these kits for reduced viral loads. Conclusions. Using a suitable kit with high compatibility for Ct >= 30 is important for detecting patients with a low viral load and helping prevent disease spread.Item Evaluating The Multifaceted Impact Of Cephalaria Extract On Dough Quality: Antioxidant, Antimicrobial, And Cytotoxic Properties(INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, 2024-12) Bagdat, Elif Seyma; Bozkurt, Fatih; Ilikkan, Ozge Kahraman; Sagdic, Osman; Tornuk, FatihCephalaria syriaca, known as cephalaria, is an annual, pilose plant with pink-purple flowers growing wild in wheat fields. Viscoelastic properties of gluten-free doughs can be improved by adding cephalaria. However, this addition results in some undesirable properties in bread such as bitter taste and dark internal colour. This study aimed to reduce these effects by obtaining cephalaria obtained from distilled water and ethanol extracts and to increase the potential use of extracts in bread production. Different proportions of water and ethanol extracts obtained from oil-free cephalaria were added to bread by creating a model with Mixture Design, and the optimum concentration was determined by farinograph trials. The antioxidative, antimicrobial, and cytotoxic effects of extract and the effect of cephalaria on yeast activity were examined. Cephalaria extracts had no measurable antimicrobial effect and no antifungal effect on Rhizopus stolonifer, while an antifungal effect was found against A. niger and P. expansum. The IC50 value was found to be 4.15 mg mL(-1 )for ethanol extract while the water extract had no effect on cells. The addition of extract had no negative effect on the number of yeasts in sourdough fermentation. The study has improved the usage of cephalaria by using water and ethanol extracts in dough.Item The Effect Of Organizational Culture İn Health Services On Employee Flourishing(WORK-A JOURNAL OF PREVENTION ASSESSMENT & REHABILITATION, 2024-11-15) Cagatay, Huseyin Tolga; Demirel, Yuksel; Ertugrul, Bekir; Tekinyildiz, EsraBACKGROUND: Culture has an important role in maximizing the value of human capital, which is regarded as the main source of organizational effectiveness. OBJECTIVE: The research was conducted to determine the effect of organizational culture perceptions of healthcare professionals working in a university hospital on employee flourishing. METHODS: It is a descriptive study conducted with 299 healthcare professionals working in a university hospital. "Structured Personal Information Form", "Denison Organizational Culture Survey" and "New Flourishing Index" to collect the data. In the analysis descriptive statistical methods such as percentage, frequency, arithmetic mean and standard deviation as well as Pearson correlation, linear regression and multiple linear regression analyses were performed to determine the relationship between variables. RESULTS: According to the results of linear regression analysis, it was determined that organizational culture and flourishing were related (F: 88.229; p < 0.05). The organizational culture alone explained 22.6% of flourishing. As a result of multiple regression analysis, it was determined that the relationship between organizational culture sub-dimensions and flourishing was significant (F = 25.975; p < 0.05). The sub-dimensions of organizational culture explained 25.1% of the flourishing. CONCLUSIONS: As a result of the study, it is observed that the perception of organizational culture of healthcare professionals has an impact on flourishing, and therefore the favorable development of organizational culture will contribute positively to employee flourishing. In present conditions, it has become a necessity for health organizations to provide the circumstances that will make all investments that will contribute positively to the flourishing of their employees a part of the organizational culture.