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Öğe Analysis of food safety and cold chain knowledge of logistics students(Journal of Human Sciences, 2018) Yıkmış, Seydi; Aksu, Harun; Demirkol, Fırat; Alpaslan, MehmetThis study was planned and conducted in order to examine the knowledge, attitudes, and behaviors of university students in the logistics department reading about the food safety and cold chain. The study was conducted on 165 university students (59 girls, 106 boys) who are logistics associate degree students. In the collection of the data, 7 information questionnaire and 20 item attitude scale questionnaires were prepared to determine students' demographic characteristics, food safety, and cold chain knowledge, attitudes and behaviors. The obtained data were evaluated with SPSS 20.0 program using frequency (f), percent (%), t-test and one-way variance analysis (ANOVA) method. It has been determined that students have not received any prior training in the marking of "Have you been trained in Food Safety, Hygiene-Sanitation, Nutrition and Health before?" 146 students (88.5%) answered no to the question " Do you find your information on food safety satisfactory " Statistically significant differences were found in the cold chain information group that the students had given the numbers 1, 6, 7 according to their gender (p <0.05). When the average scores of the infectious disease group were examined, it was determined that they participated in all statements in general. It was determined that there was a statistically significant difference between the responses of the students to the expression 1 and 20 in the cold chain of information group according to their gender (p <0.05). It has been concluded that students are not sufficient in food safety and cold chain knowledge. It has been found that most of the students want to be trained by specialists in the field of the field. Lessons in the curriculum have resulted in food safety and cold chain related compulsory courses, or elective courses that will benefit students to be equipped on a sectoral basis after graduation.Öğe Evaluation of Sous-Vide Technology in Gastronomy(Skyfox Publishing Group, 2018-03-30) Yıkmış, Seydi; Aksu, Harun; Çöl, Başak Gökçe; Demirçakmak, İbrahim LeventSous vide is cooked under control by applying a certain temperature (65-96 oC) / time after vacuuming in the package of the food which is formed alone or with other auxiliary products (sauce-spices) and stored under cold conditions (1-4 oC) by rapidly reducing the temperature after heat application This process is also known as lapping, vacuum cooking, vacuum packed cooking with vacuum pack or baking-cooling with vacuum packaged. In the products prepared by this technology, the blocking effect provided by oxidative and aerobic bacteria development through vacuum packaging combines with microbial protection effect provided by pasteurization; Thanks to the applied cold chain, a long and safe shelf life is provided and consumed. Food can be made reliable by pasteurizing at low temperatures, and even safely consumed without cracking and crunchy foods. In addition to all these advantages, sous vide technology also has some disadvantages. When the investigations are examined, it has been concluded that the research on sous vide technology's reliability in terms of health should be intensified.Öğe İstanbul’daki Bazı Yiyecek ve İçecek İşletmelerinde İç Ortam Havasının Mikrobiyolojik Kalitesi(İstanbul Aydın Üniversitesi, 2023) Çöl, Başak Gökçe; Aksu, HarunYiyecek ve içecek işletmelerinde iç ortam havasının kalitesi, gıdaların kalite özellikleri ve raf ömürlerinin korunmasında önemli bir unsurdur. İç ortam havasındaki virüs, maya-küf, bakteri gibi biyolojik kirleticiler, gıdaların bozulmalarına sebep oldukları gibi insan sağlığına da zarar verebilirler. Bu çalışma, çeşitli gıda işletmelerindeki mutfakların iç ortam mikrobiyolojik kalitelerini değerlendirmek amacıyla İstanbul’da gerçekleştirilmiştir. Üç ay boyunca 10 farklı yiyecek ve içecek işletmesinin iç ortam havasından aylık olarak hava örnekleme cihazı ile alınan örnekler mikrobiyolojik açıdan analiz edilmiştir. Analiz sonuçlarına göre mutfakların çeşitli bölümlerindeki ortalama toplam mezofilik aerob ve maya-küf sayıları sırasıyla 2,16-2,63 log kob/m3 ve 2,37- 2,61 log kob/m3 arasında hesaplanmıştır. İşletmelerin altısında toplam mezofilik aerob bakteri açısından ortalama hava kalitesinin orta, dördünde kötü iken, toplam maya-küf açısından yedi işletmenin kötü, üç işletmenin ise orta sınıfta değerlendirilmiştir. Elde edilen bulgulara göre, işletmelerin iç ortam havasının mikrobiyolojik yükünü azaltarak, havanın kalitesini artırmak için gerekli düzeltici-iyileştirici önlemleri alması gerektiği sonucuna varılmıştır.Öğe Thermosonication processing of quince (Cydonia Oblonga) juice: Effects on total phenolics, ascorbic acid, antioxidant capacity, color and sensory properties(UNIV FEDERAL LAVRAS-UFLA, CAIXA POSTAL 3037, LAVRAS, MG 37200-000, BRAZIL, 2019) Yıkmış, Seydi; Aksu, Harun; Çöl, Başak Gökçe; Alpaslan, MehmetQuince (Cydonia oblonga) is an important fruit for the juice industry because of its nutritional properties that support health. In this study, the aim was to optimize the bioactive components (total phenolic content, ascorbic acid and total antioxidant capacity) and color values (L*, a* and b*) using thermosonication treatment, which is a mild ultrasound treatment, on quince juice. Sensory evaluation was also performed with optimization parameters. For this purpose, thermosonication treatment was completed at different temperatures (30, 35, 40, 45 and 50 degrees C), different amplitudes (40%, 45%, 50%, 55% and 60%) and at different times (2, 4, 6, 8 and 10 min). At the end of the thermosonication treatment, the optimization values for quince juice were 38.7 degrees C, 5.6 minutes and 50.9 amplitude. Total phenolic content was 591.15 mg GAE/L, ascorbic acid 3.78 mg/100 mL, DPPH 0.214 mg TEAC/mL and CUPRAC 0.149 mg TEAC/mL. Total phenolic and total antioxidant levels were higher in quince juice treated with thermosonication than in fresh quince juice. Thermosonication treatment decreased the amount of ascorbic acid. Thermosonation treatments applied to quince juices were successful in general microbiological evaluation. In sensory evaluation by panelists, the thermosonicated sample was found to be the most admired. As a result, quince juice treated with thermosonication is considered promising to improve bioactive components compared to thermal pasteurization.
