Browsing by Author "Sungur S."

Now showing 1 - 4 of 4
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    Polarographic determination of fluvoxamine maleate in tablets
    (2000) Elmali F.; Alpdoǧan G.; Sungur S.; Aycan S.
    The differential pulse polarographic (DPP) method was developed for the determination of fluvoxamine maleate (I). At pH = 3. 7, (I) give a peak at - 0. 73 V in aqueous solution. The developed method was applied to the assay of the drug substance in commercial tablet formulations. The results were statistically compared with those obtained by reference methods (HPLC and direct current polarographic method) using t- and F- tests at 95 % confidence level.
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    Differential pulse polarographic determination of Enalapril maleate
    (2003) Elmali F.; Alpdoǧan G.; Aycan Ş.; Sungur S.
    A differential pulse polarographic (DPP) method has been developed for the quantitative analysis of enalapril maleate. Enalapril maleate gives a peak at -1.4 V in methanol. A calibration curve was constructed for the 20 -100 μg ml-1 concentration range. As a reference method, a reversed phase high performance liquid chromatographic procedure has been developed. Commercially available tablets were analysed by the two methods. Statistical evaluations indicated that there was no significant difference between the mean values and precisions of the two methods at a 95% confidence level.
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    The contribution of motivational beliefs to students' metacognitive strategy use
    (2011) Kahraman N.; Sungur S.
    This study aimed at investigating how well elementary students' self-efficacy and achievement goals (mastery approach, mastery avoidance, performance approach, and performance avoidance goals) predict their metacognitive strategy use in science. For the specified purpose, Achievement Goal Questionnaire and Motivated Strategies for Learning Questionnaire were administered to 115 elementary school students. Results showed that the elementary students who feel self-efficacious in science and study for the reasons of learning and understanding (mastery approach goals) the course material tend to use metacognitive strategies at higher levels. In line with the findings, specific suggestions were made for science teachers to help development of adaptive motivational beliefs and effective strategy use.
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    The Role of Subjective Task Value and Prior Achievement in the Relationship between Personal Epistemology and Science Self-efficacy Beliefs: A Moderated Mediation Analysis
    (International Council of Associations for Science Education (ICASE), 2023) Sahin F.; Sungur S.; Ates S.
    The purpose of this study is to test the relationship between seventh-grade students’ personal epistemology for science, subjective task value, and science self-efficacy, with prior achievement serving as a moderator. The mediating role of subjective task value is proposed in the prediction of the relationship between personal epistemology for science and science self-efficacy. To achieve this aim, a model that explains the relationships among the specified variables is proposed, and then this model is tested using moderated mediation techniques, controlling for the effects of gender and parental educational background variables. The study sample comprises 312 seventh-grade students, determined through stratified random sampling. The analyses confirm the mediating effect of subjective task value and reveal the moderator effect of prior achievement on the prediction of personal epistemology for science and science self-efficacy. Finally, the results of the study are compared with existing research in the field, and recommendations are provided to researchers and practitioners in science education based on these findings. © 2023 International Council of Associations for Science Education (ICASE). All rights reserved.