Doğa tarihi müzesinde bir günlük fen etkinliklerinin değerlendirilmesi

This study investigated the effectiveness of science activities held over one day at the natural history museum in a rural part of Turkey. Students’ expectations were determined before science activities were held in the museum and students' learning experiences and teachers' views on the process were examined after the science activities. Primary (5th graders, n=53) and middle school (6th, 7th, and 8th graders, n=72) students and their teachers (n=8) participated in the activities. According to the results, the activities had a positive impact on the primary and middle school students, in that they learned about the components of nature and acquisition of deepen experiences and more positive emotions. While prior to the science activities, the students expected to focused activities of observations and examinations, they emphasized the activities in which they conducted to collect and analyse fossils more strongly after the completion of activities. Students’ teachers stated that science activities in the museum increased the active participation and interest of the students compared to the classroom environment and enabled them to gain sensitivity towards the environment and science. The instructional activities in this study can easily be replicated through similar programs in any natural history museum in Turkey or anywhere else in the world.Bu çalışmada öğretmen adaylarının istatistik yapma konusundaki anlayışlarının ders imecesi/araştırması bağlamında incelenmesi amaçlanmıştır. Öğretmen adaylarının istatistik yapma sürecindeki anlayışlarının (alan bilgisi) grafiklerle ilişkili ders planlarken ve uygularken nasıl değiştiği ve nasıl öğretim pratiklerine dönüştüğüne (öğrenci ve öğretim bilgisi) odaklanılmıştır. Çalışmaya üç son sınıf öğretmen adayı katılmış, iki aşamadan oluşan (üniversite ve gerçek okul) ders imecesi/araştırması uygulaması gerçekleştirmişlerdir. Öğretmen adayları tarafından grup halinde hazırlanan ders planları, gözlemler, alan notları, yarı yapılandırılmış görüşmeler ve grup toplantılarının video ve ses kayıtları ve öğretim uygulamaları aracılığıyla veriler toplanmıştır. Öğretmen adayları başlangıçta istatistik yapma sürecinin birbiriyle ilişkili birçok bileşenden oluştuğunu düşünmemişlerdir. Ders planları tasarladıkça, kavramlar hakkında tartıştıkça anlayışları gelişmiş; bu gelişim ders planları ve öğretimsel uygulamalarına büyük ölçüde yansımıştır. İstatistiksel soruları istatistik yapmanın merkezine koymaya başlamaları, diğer temalarla ilgili fikirlerini (örneğin, veri toplama, grafikleri yorumlama) etkileyen önemli bir dönüm noktası haline gelmiştir. Ayrıca istatistik yapmakla ilgili anlayışlarının öğretim uygulamalarını doğrudan etkilediği de gözlemlenmiştir

Some properties of royal jelly a functional beekeeping product and its health effects

İşçi bal arılarının hipofaringeal ve mandibular bezlerinden salgılanan arı sütü beyazımsı renkte, kendine özgü kokuda, ekşimsi tatlı bir tatta ve viskoz yapıda olan doğal bir arıcılık ürünüdür. Yapısında çeşitli karbonhidratlar, proteinler, esansiyel aminoasitler, lipitler, yağ asitleri, B grubu vitaminleri ile A, C, D ve E vitaminleri, potasyum, kalsiyum, sodyum, magnezyum gibi mineraller ve fenolik bileşikler bulunması nedeniyle arı sütünün besin değeri yüksektir. Arı sütünün sahip olduğu bu zengin biyoaktif bileşik içeriği sayesinde antimikrobiyal, antioksidan, antiinflamatuar, antidiyabetik, antikanser ve antihipertansif etkiler ile bağışıklık, sinir ve sindirim sistemleri üzerine birçok olumlu etkileri bulunmaktadır. Bu nedenle toplumun farklı kesimleri tarafından doğrudan arı sütü şeklinde veya bal, polen veya propolis karışımları halinde takviye gıda olarak tüketimi tercih edilmektedir. Bu çalışma arı sütünün bazı fiziksel, duyusal ve kimyasal özellikleri, sağlık üzerine etkileri ve gıda olarak tüketimi ile ilgili bilgilerin derlenmesi amacıyla gerçekleştirilmiştir.Royal jelly, secreted from the hypopharyngeal and mandibular glands of worker honeybees, is a natural beekeeping product with a whitish colour, distinctive odour, sour-sweet taste, and viscous structure. It has a high nutritional value because it contains various carbohydrates, proteins, essential amino acids, lipids, fatty acids, B group vitamins, vitamins A, C, D, and E, and minerals such as potassium, calcium, sodium, magnesium, and phenolic compounds. It has antimicrobial, antioxidant, antiinflammatory, antidiabetic, anticancer, and antihypertensive effects and many positive effects on the immune, nervous, and digestive systems because of its rich bioactive contents. For this reason, its consumption is preferred by society as a supplementary food and can be consumed directly in the form of royal jelly or honey, pollen, or propolis mixtures. This study was carried out to review information about some physical, sensorial, and chemical properties of royal jelly, its effects on health, and its consumption as a food

Reduced graphene oxide supported tin oxide-boron oxide flexible paper anodes for Li-ion batteries

Freestanding tin oxide-boron oxide/reduced graphene oxide (SnO2-B2O3/rGO) nanocomposite anode was produced for Li-ion cells. This binder-free flexible paper anode structure was fabricated by combining SnO2-B2O3 composite and graphene oxide which were synthesized through the sol-gel method and Hummers' method, respectively. Field emission gun scanning electron microscopy, high-resolution transmission electron microscopy, energy dispersive X-ray spectrometer, Fourier transform infrared spectroscopy, Raman spectroscopy, and X-ray diffraction were utilized to characterize anode materials. The Williamson-Hall (W-H) analysis was applied using XRD data to determine crystal size and strain of the lattice. Electrochemical tests, cyclic voltammetry, and electrochemical impedance spectroscopy measurements were performed to determine electrochemical properties of the anodes. The results indicated that the anode formed with SnO2-B2O3 particles anchored on the rGO layers provided higher discharge capacity (838 mAh g(-1)) than that of SnO2/rGO (395 mAh g(-1)) after 100 cycles. The electron-deficient nature of boron supplied an effective increase in electrochemical energy storage performance

The value of dual-energy computed tomography in the evaluation of myocarditis

PURPOSEThe inflammation of the heart muscle is referred to as acute myocarditis. Cardiac magnetic resonance imaging (CMR) has become the primary method for a non-invasive assessment of myocardial inflammation. However, there are several drawbacks of CMR. During the last decade, dual energy computed tomography (DECT) has been used in cardiac imaging. The current study aims to assess the efficacy and feasibility of DECT in acute myocarditis and compare the results to CMR.METHODSThis prospective study included patients who had myocarditis but no coronary artery pathology. Two observers evaluated the patients for acute myocarditis using DECT and CMR. CMR was performed on 22 patients within 24 hours of DECT, which was administered within 12 hours following the onset of chest pain. Inter-observer agreement was tested with Cohen’s Kappa coefficient, and Spearman’s correlation was used to examine the possible correlations. A P value of <0.050 was accepted as statistically significant.RESULTSThe DECT and CMR agreement was significant for transmural diagnoses, excellent for subepicardial and intramyocardial diagnoses, and perfect for nodular and band-like patterns.CONCLUSIONThe findings of this study showed that the dark areas on the color-coded iodine map created with DECT were strongly correlated with CMR in acute cases of myocarditis. In addition, DECT is a robust imaging method that can also be used in the diagnosis of acute myocarditis. Furthermore, it provides information about coronary arteries faster and more reliably than magnetic resonance imaging without any limitations

Oral cancer awareness in Turkish dental patients

Objectives: This study aims to provide data from dental patients about their oral health attitudes, dental visits, oral cancer predisposing factors and general knowledge about early signs of oral cancer. Methods: This study was conducted on dental examination patients, involving both genders with an age range of 12–77 years. All questions were asked through a written questionnaire. Results: This study included 254 cases with a mean age of 31.8±16.4 years. One hundred and fifty three (60.2%) of the study group consisted of females and 101 (40%) were males. Smoking and alcohol consumption were frequent among the working group and males (p=0.001). Regarding general knowledge about early cancer signs, there was no significance among genders. Considering attitudes of the last dental visits of individuals according to their occupation, the working group displayed significance (p=0.005). The total rate for information about oral cancer, causes and symptoms 20 (7.9%) individuals had positive knowledge. Only 5 (0.02%) of the participants would refer to a dentist for neck swelling. Conclusion: General knowledge of signs and symptoms of oral cancer are low in Turkish dental patients, most declare that early diagnosis is important. The main predisposing factors of oral cancer (smoking and alcohol) are statistically more consumed by the working group but showed no gender predisposition

Characterization of the Embryonic and Larval Development of Wild Pike-Barb (Luciobarbus esocinus) Biological Parameters, and the Possibility of Breeding

This study was conducted to obtain preliminary data on the possibility of breeding this species through artificial insemination and to determine the incubation period at different temperatures (°C) of hatchery water [20 (A1), 22 (A2), 25 (A3) and 26 (A4); (±1)] and to determine the morphological and larval growth parameters of L. esocinus. The blastoderm formed an embryonic shield 43 h (A1 and A2) and 36 h (A3 and A4) after insemination. The eggs hatched after 113 h (A1 and A2) and 61.5 h (A3 and A4) after insemination, and new larvae were observed. Exposing the newly fertilized eggs to various temperatures during the incubation period resulted in significantly longer duration of embryo formation, egg hatching and yolk sac consumption (h) at 20°C and 22°C than at 25°C and 26°C (P 0.05). However, significant differences in day-degree of hatching were observed among all the groups (P < 0.05)

Sol-Gel Synthesis of Nanostructured SnO2 Thin Film Anodes for Li-Ion Batteries

Sol-gel technique was employed to prepare semiconductor tin dioxide (SnO2) thin films. Comparatively, it gives an advantage over other techniques by its low reaction temperature, easy process and low cost. The effect of glycerin addition on the structure and preventing crack formation has been investigated. Scanning electron microscopy, atomic force microscopy, and X-ray diffraction analysis were performed to characterize nanostructured films