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Experimental investigation on the heat transfer characteristics of nanofluids in a cylindrical heat exchanger tube using quad-structured vortex generator with semi-perforations
No full textPublic Opinion Study on School Health Education Programs: Family Needs Assessment Study †
No full textHealth education programs are important interventions aimed at the acquisition of health knowledge and behaviors that are necessary throughout the lives of individuals of all ages. Considering the importance of health education in structuring the health of the society, it is very important that health education responds to the needs of society and meets its expectations. At this point, public health is protected by providing access to families and communities through health education. In this context, a needs analysis study was conducted with families (students and parents) to establish a health education framework. The study group consisted of 289 volunteer primary and secondary school students and 60 parents who agreed to participate in the study. Semi-structured interviews were conducted with students and parents using a descriptive approach. The needs analysis form prepared by the researchers was used in the interviews and content analysis was applied to the obtained data. The qualitative data obtained from the analyses were interpreted. As a result of the study, it was found that families have expectations and needs in first aid and daily life behaviors (nutrition, hygiene, oral health and diseases) in school health education, and accordingly, school health education can be focused on these specified areas. The fact that families found health knowledge insufficient and considered health education important emphasizes the importance of the knowledge provided by health education and the results. The family health education views obtained in the study can be used in future studies to improve family health behaviors and community health. In addition, family-based school health education can be disseminated with contemporary interventions
Synthesis of water-based latexes using siloxane-derived surfactants and investigation of their use in pigment printing applications
No full textDeveloping new recipes for waterborne polymer latex binders with improved colloidal stability and application performance is crucial for sustainable, eco-friendly textile printing processes. For this purpose, 15 waterborne poly(vinyl acetate-co-butyl acrylate) latexes were synthesized by semi-continuous emulsion polymerization using nonionic (ABIL® B 8843, ABIL® B 88184) and amphoteric (ABIL® B 9950) silicone-based surfactants at five concentrations close to their critical micelle concentrations (between 0.08 and 0.24 wt.%). Other critical synthesis conditions, such as the fixed monomer ratio (85:15), initiator amount, stirring rate, total reaction time, and temperature, were kept constant to ensure reproducibility and reaction consistency in all formulations. A comprehensive characterization of the synthesized latexes was performed, colloidal stability was monitored over one year, and latexes that did not exhibit phase separation were utilized in textile pigment printing applications on both woven and knitted cotton fabrics. The AB-50-020 sample prepared using ABIL® B 9950 at 0.20 wt.% exhibited the highest colloidal stability, characterized by a zeta potential of − 75.67 mV and the smallest particle size of 323.6 nm. Despite the high relative conversion rates (94.3–99%) of the samples obtained from ABIL® B 8843 and ABIL® 88184, the number of samples showing long-term stability among the formulations in these series was low, limiting their practical applications. The rubbing, washing, and color fastness, especially in formulations containing ABIL® B 9950, highlight their suitability as sustainable alternatives for textile applications on woven and knitted cotton fabrics
An experimental study of the investigation of post-harvest fungal control potential of natamycin-loaded chitosan nanoparticles: synthesis, characterization, and antifungal activity analyses
No full text2014 - 2021 Yıllarındaki ALES Matematik Sorularının Matematik Taksonomisi ve Öğrenme Alanlarına Göre İncelenmesi
No full textVirtual Triggers, Real Reactions: Investigating the Link Between Internet Addiction and Aggression
No full textMevsimsel iş yoğunluğunun düğün fotoğrafçılığı şirketlerinin fotoğrafçı işe alım süreçlerine ve şirket-fotoğrafçı beklentilerine etkisi
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Streptomyces antarcticus sp. nov., isolated from Horseshoe Island, Antarctica
No full textThree novel actinobacterial strains, H27-S2T, H34-AA3 and H34-S5, were isolated from soil samples collected on Horseshoe Island, Antarctica, as part of an effort to discover new Streptomyces species with industrial and pharmaceutical relevance. A genome-based comparative analysis was conducted to characterize the strains. The pairwise comparisons of the 16S rRNA gene sequences confirmed their affiliation with the genus Streptomyces, with the highest sequence identity values of 99.7–99.8% with Streptomyces avidinii NBRC 13429T. However, genome-based taxonomic analyses, including digital DNA– DNA hybridization and average nucleotide identity analyses, confirmed that these strains represent a novel species within the genus Streptomyces. A comprehensive genome annotation revealed that the strains possess extensive biosynthetic capabilities, particularly for secondary metabolites, antimicrobial resistance mechanisms, heavy metal resistance genes and stress adaptation systems for survival in cold environments. Their metabolic potential includes aromatic compound degradation, indicating a promising role in bioremediation, while their secondary metabolite gene clusters suggest potential applications in pharmaceutical and clinical research. Given their ability to thrive in extreme Antarctic conditions, these strains may contribute to advancements in cryotechnology and enzyme production for industrial applications. Based on phylogenomic analyses, these strains represent a novel Streptomyces species, for which the name Streptomyces antarcticus sp. nov. is proposed. The type strain is H27-S2T (=DSM 114983T=CGMCC 4.7867T)