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Ozturk, Ismet,Sagdic, Osman,Yetim, Hasan Korean Society for Food Science of Animal Resource 2021 한국축산식품학회지 Vol.41 No.2
The objective of this study was to determine the effects of yeast cultures (Candida zeylanoides and Debaryomyces hansenii) isolated from traditionally dry fermented Turkish sucuks, on some physicochemical and microbiological properties of the product. Eight different batches of the sucuks were produced by the inoculation of yeast and lactic acid bacteria (LAB) cultures (Lactobacillus curvatus, Lactobacillus plantarum and Lactobacillus sakei) in different combinations. The sucuks were ripened for 12 days and analyzed at 1st, 6th, and 12th days of ripening. Percent moisture content, pH, water activity (aw) and residual nitrite values of the sucuk inoculated with the yeast cultures were higher at the end of the ripening. The use of yeast cultures decreased hardness, gumminess, and chewiness values of the sucuk while increased adhesiveness values. Major volatile groups were aldehydes, terpenes, and sulphur compounds in the sucuk samples. The most noticeable results were for sensory properties of the sucuk that were positively improved by the yeast cultures.
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Elvan Hasanog˘lu O¨ zkan,Nurdan Kurnaz Yetim,Dilek Nartop,Nurs¸ en Sarı 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.25 No.-
New nanospheres have been prepared with Pt2+ and Pt4+ for compare enzymatic properties of glucose oxidase enzyme (GOx). In this study nanoparticles, (aminomethyl)polystyrene (APS), 2-hydroxy-5- methylbenzaldehyde and Pt2+/Pt4+ have been synthesized by means of template and investigated the enzymatic properties of glucose oxidase enzyme (GOx) immobilized on there. The characteristics of the immobilized glucose oxidase (APS–Pt2+–GOx and APS–Pt4+–GOx) enzyme showed one optimum pH value. The influence of temperature, reusability and storage capacity on the free and immobilized glucose oxidase enzyme have been investigated. It is found that nanosphere including platinium atom exhibits excellent performance as the immobilized supporter of GOx, the immobilized enzyme demonstrates perfected storage and recycling stability. APS–Pt2+–GOx retains more than 30% of the initial activity after 32 successive cycles, which is a remarkable result.
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Application of high-resolution melting analysis for differentiation of spoilage yeasts
Mine Erdem,Zülal Kesmen,Esra Özbekar,Bülent Çetin,Hasan Yetim 한국미생물학회 2016 The journal of microbiology Vol.54 No.9
A new method based on high resolution melting (HRM) analysis was developed for the differentiation and classification of the yeast species that cause food spoilage. A total 134 strains belonging to 21 different yeast species were examined to evaluate the discriminative power of HRM analysis. Two different highly variable DNA regions on the 26 rRNA gene were targeted to produce the HRM profiles of each strain. HRMbased grouping was compared and confirmed by (GTG)5 rep- PCR fingerprinting analysis. All of the yeast species belonging to the genera Pichia, Candida, Kazachstania, Kluyveromyces, Debaryomyces, Dekkera, Saccharomyces, Torulaspora, Ustilago, and Yarrowia, which were produced as species-specific HRM profiles, allowed discrimination at species and/or strain level. The HRM analysis of both target regions provided successful discrimination that correlated with rep-PCR fingerprinting analysis. Consequently, the HRM analysis has the potential for use in the rapid and accurate classification and typing of yeast species isolated from different foods to determine their sources and routes as well as to prevent contamination.
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Mehtap Honca,Tarık Purtuloglu,Emin Ozgur Akgul,Muzaffer Oztosun,Tevfik Honca,Ali Sizlan,Mehmet Agilli,İbrahim Aydin,Memduh Yetim,Fevzi Nuri Aydin,Halil Yaman 대한마취통증의학회 2014 Korean Journal of Anesthesiology Vol.66 No.5
Background: The aim of this study was to investigate the effects of anesthetic techniques used during general anesthesia (GA) and spinal anesthesia (SA) on endothelial adhesion molecules in the fetal circulation of healthy parturients undergoing elective cesarean section. Methods: Patients were randomly assigned to either the general anesthesia (n = 20) or spinal anesthesia (n = 20) group. Maternal and cord blood neopterin, sE-selectin, and sL-selectin levels were measured in both groups. Results: Cord blood neopterin concentrations in the SA group were not different from those in the GA group, but maternal neopterin levels in the SA group were different from those in the GA group. Maternal blood levels of sE-selectin and sL-selectin were not different between the two groups. Similarly, the cord blood levels of sE-selectin and sL-selectin were not different between the two groups. We found an increased inflammatory process in the fetal circulation depending on the anesthetic method used. Conclusions: These results indicate the effects of general and spinal anesthetic techniques on serum sL-selectin, sE-selectin, and neopterin levels in neonates and parturients undergoing elective cesarean section. sE-selectin and neopterin concentrations and leukocyte counts were higher in the fetal circulation than in the maternal circulation during both GA and SA.
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