Kazan Meslek Yüksekokulu / Kazan Vocational School

Permanent URI for this collectionhttps://hdl.handle.net/11727/2077

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    Physicochemical And Sensorial Properties Of Tomato Leathers At Different Drying Conditions
    (Başkent Üniversitesi Kazan Meslek Yüksekokulu, 2024-04-12) Basdemir, Eren; Ince, Alev Emine; Kizgin, Sakine; Ozel, Baris; Ozarda, Ozlem; Sumnu, Servet Gulum; Oztop, Mecit Halil
    Tomato leather as a healthy alternative to traditional fruit leathers was formulated. A tray dryer with changing temperature (50, 60, and 70 degrees C) and relative humidity (5%, 10%, and 20%) was used to achieve the best product in terms of color, water distribution, lycopene content, mechanical, and sensorial properties. Color change was the highest at 70 degrees C due to the Maillard reaction. Lycopene content was also the highest at 70 degrees C. Time domain-NMR relaxometry showed that water distribution of all samples was homogeneous and similar to each other. Processing conditions affected mechanical properties significantly. The highest tensile strength was observed at 70 degrees C, possibly due to the denatured proteins. Sensory analysis indicated better flavor development at 70 degrees C, whereas overall acceptability of samples was higher at 50 degrees C. The results of this study showed the main processing parameters of tomato leather with a minimal amount of ingredients, with acceptable mechanical and sensorial properties.Practical ApplicationTomato leather was produced by using minimal amount of ingredients. Taste of the leather was found acceptable, as a salty snack food. Therefore, this product can be produced economically and it has a high potential to be consumed as an alternative to conventional fruit leathers.
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    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, Fatih
    Microencapsulation 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.
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    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, Aysegul
    Objectives. 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.
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    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, Fatih
    Cephalaria 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.
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    A Novel Synbiotic Edible Film Based On Aquafaba, Psyllium Husk Powder, Peg 400, And Lactiplantibacillus Plantarum 299v And Applicability On Kashar Cheese
    (JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION, 2024-12) Ilikkan, Ozge Kahraman; Bagdat, Elif Seyma; Yilmaz, Ilkay; Beyter, Nurten; Yuzay, Isinay Ebru
    In this study, it was aimed to compare a novel synbiotic edible film based on aquafaba, psyllium husk powder, and PEG 400 with or without Lactiplantibacillus plantarum 299v. Therefore, primarily, optimization of the edible film was carried out by Box-Behnken design in response surface methodology (rsm). The characterization of edible films with or without probiotic bacteria was performed by FTIR, viscosity, pH, total solid content, water and oxygen solubility, film thickness, color L*, a*, b*, transparency, and film tensile strength. It was determined that there was no statistically significant difference in viscosity, pH, lightness L*, water vapor, and oxygen permeability values with the addition of probiotic lactic acid bacteria to the optimized coating film samples. In addition, it was observed that the probiotic bacteria count did not decrease below 108 cfu/g for 60 days of storage. The resulting edible film formulation with (PL) and without (PS) probiotics was used to coat Kashar cheese, while control cheeses (C) were not coated. As a result, it was observed that the microbiological quality of the coated cheeses was as good as control or better than control especially at the end of storage in terms of mold/ yeast and coliforms. Sensory evolution revealed coating films with or without probiotics did not change the texture, flavor, odor, or appearance of cheeses. Physicochemical properties such as pH, % titratable acidity, % dry matter, % fat, and % salt were detected.
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    The Effects of Using Artificial Intelligence and Robotics in Logistics Service Production: An Application in 3pls and 4pls
    (2023) Caglar, Macide Berna; Taskin, Bihter Karagoz
    Background: The purpose of this study is to investigate how artificial intelligence (AI) and robotic awareness, perceived organizational support, and competitive psychological climate approaches relate to turnover intention. In the literature, studies on robotic awareness and turnover intention have been undertaken in a variety of industries. In this respect, this study aims to address the absence in the literature of research on logistics services providers. This study aims to help businesses understand how to retain employees and foster a more inclusive and supportive workplace.Methods: The study utilizes survey information from 100 senior managers in the operations function of logistics service providers. The outcomes are obtained by modeling structural equations with SmartPLS. Data from the survey were gathered using the snowball sampling technique.Results: The results of the research reveal the effect of artificial intelligence and robotic awareness on competitive psychological and turnover intention.Conclusions: The study aims to explore the role of a competitive psychological climate and organizational support in mediating the relationship between AI and robotics awareness and turnover intention. We identify that awareness of AI and robotics has a considerable, favorable effect on the psychological climate of competition and turnover intention. We also find that the competitive psychological atmosphere has a substantial, favorable effect on turnover intention. In addition, organizational support has been demonstrated to have a substantial, favorable effect on turnover intention. However, it was not possible to identify the mediating role of organizational support and the psychological environment of competition in moderating the association between awareness of AI and robotics and turnover intention. On the basis of the research's findings, suggestions were made.
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    Genome composition analysis of multipartite BNYVV reveals the occurrence of genetic re-assortment in the isolates of Asia Minor and Thrace
    (2020) Ozmen, Canan Yuksel; Khabbazi, Saber Delpasand; Khabbazi, Afsaneh Delpasand; Gurel, Songul; Kaya, Riza; Oguz, Muhammet Cagri; Turan, Ferzat; Rezaei, Fereshteh; Kibar, Umut; Gurel, Ekrem; Ergul, Ali; 32139777
    Beet necrotic yellow vein virus (BNYVV) is the cause of rhizomania, an important disease of sugar beet around the world. The multipartite genome of the BNYVV contains four or five single-stranded RNA that has been used to characterize the virus. Understanding genome composition of the virus not only determines the degree of pathogenicity but also is required to development of resistant varieties of sugar beet. Resistance to rhizomania has been conferred to sugar beet varieties by conventional breeding methods or modern genome engineering tools. However, over time, viruses undergo genetic alterations and develop new variants to break crop resistance. Here, we report the occurrence of genetic reassortment and emergence of new variants of BNYVV among the isolates of Thrace and Asia Minor (modern-day Turkey). Our findings indicate that the isolates harbor European A-type RNA-2 and RNA-3, nevertheless, RNA-5 is closely related to East Asian J-type. Furthermore, RNA-1 and RNA-4 are either derived from A, B, and P-types or a mixture of them. The RNA-5 factor which enhance the pathogenicity, is rarely found in the isolates studied (20%). The creation of new variants of the virus emphasizes the necessity to develop new generation of resistant crops. We anticipate that these findings will be useful for future genetic characterization and evolutionary studies of BNYVV, as well as for developing sustainable strategies for the control of this destructive disease.
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    The Effects of Audience's Attitudes on Actor, Character, Movie and Product Placement on the Brand Attitude
    (2020) Ulker-Demirel, Elif; Yildiz, Erkan
    In recent years, there has been a shift in consumers' media consumption preferences from traditional to digital platforms. Adblocker applications used by consumers who do not want to be exposed to advertising and the digital platforms that offer ad-free content make it increasingly difficult for brands to reach audiences in a highly saturated advertising environment. In this environment, product placement remains essential in reaching the target audiences due to the advantages it offers to brands compared to traditional advertisements. The aim of this study, being distinctly different from previous research, is to test the effects of attitude toward actor and character on attitude toward movies, product placement, and brand. Furthermore, it is aimed to investigate the serial mediating effect between these attitudinal constructs. The data obtained from 300 participants were analyzed with SmartPLS 3.2.8 using partial least squares path analysis (PLS-SEM). As a result, the attitude toward the actor, character, and movie has direct and indirect effects on product placement and attitude toward the brand. Furthermore, the effect of the attitude toward movies and product placement has a serial mediating effect on the relationship between the attitude toward the actor, the character and the brand.
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    Covering the More Visible Region by Electrochemical Copolymerization of Carbazole and Benzothiadiazole Based Donor-Acceptor Type Monomers
    (2019) Cansu-Ergun, Emine Gul; 0000-0002-3941-4345; I-7385-2017
    An electrochromic copolymer film of 2-(3,3-dihexyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepin-6-yl)-7-(3,3-dihexyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepin-8-yl)-9H-carbazole (M1) and 4,7-bis(thiophen-2-yl)benzo[c][1,2,5]thiadiazole (M2) was prepared via electrochemical technique. The copolymerization was performed with one to one monomer feed ratio. Electrochemical and optical properties of the resulting copolymer film (P3) and the homopolymer films of M1 and M2 (P1 and P2) were investigated by using cyclic voltammetry and UV-Vis spectrometry techniques, and the corresponding results were compared. Incorporation of M1 and M2 into copolymer matrix was clearly observed on the resulting cyclic voltammograms and UV-Vis spectra. P3 covered the visible regions coming from both P1 and P2, and exhibited a neutral state darker color than those of homopolymers. P3 film was found to have a multichromic behavior, appearing as brown in its neutral state while changing its color upon oxidation to dark-gray (at about 0.3 V), to blue (at about 0.6 V) and finally to grayish cyan (beyond 0.9 V), with a corresponding optical band gap of 1.65 eV.
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    Pulse frequency fluctuations of magnetars
    (2019) Cerri-Serim, D.; Serim, M. M.; Sahiner, S.; Inam, S.C.; Baykal, A.; 0000-0003-0820-9186
    Using RXTE, Chandra, XMM-Newton and Swift observations, we construct the power spectra and torque noise strengths of magnetars for the first time. For some of the sources, on time-scales of months to years, we measure strong red noise that might be a consequence of their outbursts. We compare the noise strengths of magnetars with those of radio pulsars by investigating the possible correlations of noise strength with spin-down rate, magnetic field and age. Using these correlations, we find that the noise strengths of magnetars obey similar trends as radio pulsars. However, we do not find any correlation between noise strength and X-ray luminosity, a correlation that has been seen in accretion-powered pulsars. Our findings suggest that the noise behaviour of magnetars resembles that of radio pulsars, but magnetars possess higher noise levels likely because of their stronger magnetic fields.