Fen Edebiyat Fakültesi / Faculty of Letters and Science

Permanent URI for this collectionhttps://hdl.handle.net/11727/1396

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    Comprehensive Analysis Of The Crispr-Cas Systems In Streptococcus Thermophilus Strains Isolated From Traditional Yogurts
    (ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY, 2024-12) Ozcan, Ali; Yibar, Artun; Kiraz, Deniz; Ilikkan, Ozge Kahraman
    Phage resistance is crucial for lactic acid bacteria in the dairy industry. However, identifying all phages affecting these bacteria is challenging. CRISPR-Cas systems offer a resistance mechanism developed by bacteria and archaea against phages and plasmids. In this study, 11 S. thermophilus strains from traditional yogurts underwent analysis using next-generation sequencing (NGS) and bioinformatics tools. Initial characterization involved molecular ribotyping. Bioinformatics analysis of the NGS raw data revealed that all 11 strains possessed at least one CRISPR type. A total of 21 CRISPR loci were identified, belonging to CRISPR types II-A, II-C, and III-A, including 13 Type II-A, 1 Type III-C, and 7 Type III-A CRISPR types. By analyzing spacer sequences in S. thermophilus bacterial genomes and matching them with phage/plasmid genomes, notable strains emerged. SY9 showed prominence with 132 phage matches and 30 plasmid matches, followed by SY12 with 35 phage matches and 25 plasmid matches, and SY18 with 49 phage matches and 13 plasmid matches. These findings indicate the potential of S. thermophilus strains in phage/plasmid resistance for selecting starter cultures, ultimately improving the quality and quantity of dairy products. Nevertheless, further research is required to validate these results and explore the practical applications of this approach.
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    Strategies for Becoming A More Desirable Mate: Evidence From 14 Countries
    (PERSONAL RELATIONSHIPS, 2024) Tekes, Burcu
    The current research aimed to study the strategies that people employ in order to become more desirable as mates in different cultural settings. More specifically, using a closed-ended questionnaire on a sample of 7181 participants from 14 different countries, we identified 10 different strategies that people employ to become more appealing as mates. Participants indicated that they had more frequently used the "Enhance looks," followed by the "Show off abilities and talents," and the "Demonstrate similarity" strategies. On the other hand, they had less frequently used the "Keep undesirable things hidden," the "Show off and exaggerate wealth and abilities," and the "Drastic appearance changes" strategies. Female participants indicated that they had more extensive used the "Enhance looks" strategy than male participants, while male participants indicated that they had more extensive used the "Increase income and social status" and the "Show off and exaggerate wealth and abilities" strategies than female participants. The sex effects, as well as the extent of use, were generally consistent across the different cultures. The identified strategies were classified further into two main strategies, namely the "Develop and demonstrate desirable traits" and the "Deceive about undesirable traits," which was generally consistent across the different countries.