Browsing by Author "Kara, Y."

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Determination of Bioactivity and Antimicrobial Activity of Bumblebee (Bombus Terrestris L.) Brood Cover Wax Material
(Hellenic veterinary Medical Soc, 2022) Erkan, C.; Kara, Y.; Keskin, M.; Ertrk, O.; Goesterit, A.; Kolayli, S.
Bumblebee (Bombus terrestris L.) is a bee species that take part in pollination. Although Bumblebee (Bombus terrestris L.) is thought to be used only in pollination but, it is not only take part in pollination. It could be used to produce different products. Brood cover wax material is a kind of bumblebee product that produced by Bumblebee (Bombus terrestris L.) in order to cover their nest. Although it is considered to be waste for human health, brood cover wax material is an important hive product with its antioxidant and antimicrobial activities. In this study, Bumblebee brood cover wax material was produced under laboratory conditions in a controlled manner. Biochemical characterization of brood cover wax material obtained from five different colonies was performed and antimicrobial ac-tivities were determined. Accordingly, it was determined that the total phenolic content of the samples ranged between 3.778 +/- 0.165 and 9.504 +/- 0.353 mg GAE/g. In addition, it was observed that the samples were rich in p-coumaric acid, luteolin, quercetin, t-sinnamic acid, chrysin and pinocembrin components. Obtained results showed that brood cover wax material, which also possessed antimicrobial activity, had nearly equivalent activity to Apis mellifera L. beehive products such as honey, pollen and bee bread. The data obtained could be concluded that brood cover wax material could be used an alternative product for human health applications.
Stem Education Effect on Inquiry Perception and Engineering Knowledge
(Ozgen Korkmaz, 2022) Kutlu, E.; Bakirci, H.; Kara, Y.
Despite the adoption of modern educational approaches such as activity-based, laboratory-based, technology enhanced science education, it is known that in most cases, students have difficulties in achieving desired learning goals such as developing inquiry skills and engineering knowledge. The efforts of science educators to ensure that students reach the desired learning goals have led to the development of new educational approaches. It is then necessary to put the emerging educational approaches into practice, to determine their effects in practice, and to determine the level of achieved learning goals. Therefore, the study intends to examine the effect of Science, Technology, Engineering and Mathematics (STEM) supported science teaching on the perception of inquiry learning skills and engineering knowledge level of 8th graders regarding Basic Machines unit. Quasi experimental research design was adopted. The study was conducted with 8th grade students. The participant students were recruited through easily accessible sampling method. This study was implemented during five weeks. The Inquiry Learning Level Perception Scale (ILSPS) and the Engineering Knowledge Level Scale (EKLS) were data collection tools. The data obtained revealed that STEM supported science teaching was effective on 8th graders inquiry learning skill perception and engineering knowledge levels. It is recommended to carry out comprehensive studies to reveal the effect of STEM-supported science teaching on students’ design skills in the 21st century. © 2022, Ozgen Korkmaz. All rights reserved.