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Enhancing Children’s Self-Regulation Skills in STEM Learning Environments
No full textEarly STEM learning environments can impact children’s self-regulation (SR) skills. Problem-solving and analytical thinking processes strengthen working memory, while the need to adapt to different strategies increases attention flexibility. In addition, being patient to reach the right solution supports children’s inhibitory control skills. The study aims to examine the effects of STEM learning environments on the SR skills of 6–7-year-old students (first grade primary school students) studying in the first grade of primary school. The participants in this study, which employed a quasi-experimental design with a control group, consisted of 54 students, divided equally between the intervention group (n = 27) and the control group (n = 27). Data were collected using an SR skills scale in the study. The obtained data were analyzed with a t-test for related and unrelated samples. The findings reveal a statistically significant difference between the pre- and posttest measurements of the SR skill scores for the intervention group students. When the changes in posttest scores between the intervention and control groups were examined, the students in the intervention group had a significantly higher score on the SR than those in the control group. The findings indicate the effectiveness of STEM learning environments on SR skills
Determination and Evaluation of Alternatives for Post-Earthquake Temporary Sheltering Area
No full textAfter natural disasters like earthquakes, identifying the locations of disaster victims and establishing temporary shelter areas are essential for their mental and physical well-being. Evaluating and determining such areas has been a key focus for researchers to provide decision-makers with data to create suitable solutions. Türkiye, located in a disaster-prone region, experienced two major earthquakes centered in Kahramanmaraş in February 2023. This study focuses on determining the temporary shelter areas in Hatay, a severely affected province. The research consists of two main parts: (i) The suitability of neighborhoods and districts for post-disaster settlement is evaluated based on logistics, transportation, and infrastructure. Additionally, seismicity and liquefaction safety coefficients were used to calculate the suitability values. Findings show that the neighborhoods in the Reyhanlı district align well with the determined criteria. (ii) Temporary shelter areas are selected using the p-median model, which is applied to solve the location selection problems. Results indicate that if five shelter sites are to be established, one should be located in Kumlu, while the remaining four should be in the Erzin district. These findings aim to provide a systematic approach for planning post-disaster temporary shelters in earthquake-affected regions.</p
MOF-5 ve MWCNT İçeren İletken Mürekkep ile Modifiye Edilmiş Esnek Elektrotların Hazırlanması ve Süperkapasitör Uygulamaları
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Exopolysaccharide Production from Six Different S. boulardii Strains and Determination of Monosaccharide Composition, Rheological and Antioxidant Properties
No full textYeast derived EPSs have gained much popularity due to their techno-functional properties in recent years. In this context, six different S. boulardii strains, proven for their probiotic properties, were used to obtain EPS. HPLC results showed that the Sb EPSs had the heteropolysaccharide structure, and were mainly composed of mannose and glucose units. Besides this, fructose (only detected in S3 and S6), rhamnose (S4, S6, S7, S8, and S9) and galactose (S3, S6, S7, S8, and S9) were detected. However, xylose was not detected in any Sb EPS samples. FT-IR results confirmed the polysaccharide structure of Sb EPSs. The Sb EPSs exhibited more than 100% water holding capacity, and high-water solubility index. Within this context, the WHC and WSI values for the Sb EPSs ranged from 104.02±1.40 % to 102.38±0.89 % and 89.41±0.71 % to 82.14±6.60 %, respectively. The Sb EPSs exhibited shear thinning flow behaviour, and their viscosities were lower than those of guar gum. The Sb EPSs had excellent antioxidant activity for all tested three antioxidant methods of ABTS, DPPH, and FRAP. Accordingly, the antioxidant activities for the Sb EPSs, determined by the DPPH, ABTS, and FRAP assays, were found to be in the ranges of 53.59±0.29% (S6) to 49.25±0.44% (S9); 84.71±0.64% (S3) to 69.08±1.99% (S7); and is 121.33±2.20 (S6) to 97.16±3.33 (S9) mg TE/100 g, respectively. Especially the S6 EPS sample displayed high antioxidant activity in all three methods (P≤0.05). These results showed that Sb EPSs may be a good alternative in food applications
A Comparative Study of the Ability to Separate Isomers and Surface Properties of Leaves and Stems of Leonurus cardiaca L. Biomass
No full textInverse gas chromatography was used to investigate the isomer separation capability and surface properties of Leonurus cardiaca L. leaves and stems. The retention diagrams of the selected solvents were plotted between 303.2 and 328.2 K using the inverse gas chromatography technique. The selectivity coefficients (α) of the structural isomers were determined for L. cardiaca L. biomass under conditions of infinite dilution using the retention diagram. Besides, the surface properties of L. cardiaca L. biomass were investigated using inverse gas chromatography at infinite dilution. The dispersive surface energy of the adsorbent was determined using the Schultz, Dorris–Gray, Donnet–Park, and Hamieh methods. Adsorption enthalpy and Gibbs free energy were calculated using this technique. It was determined that the surface of both L. cardiaca L. leaves ((Formula presented.)) and stems ((Formula presented.)) exhibit acidic characteristics
