2021 Cilt 2 Sayı 1

Permanent URI for this collectionhttps://hdl.handle.net/11452/27954

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Browsing by Department "Fen Edebiyat Fakültesi"

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    Lactate dehydrogenase enzyme activity in some tissues of rats exposed to methyl parathion
    (Bursa Uludağ Üniversitesi, 2021-04-14) Dere, Egemen; Arı, Ferda; El Arfaoui, Aboush; Fen Edebiyat Fakültesi; Biyoloji Bölümü; 0000-0001-9572-1051; 0000-0002-6729-7908; 0000-0002 0057 3832
    Insecticides are of great importance in combating insects that damage agricultural products. However, the risks they pose for humans and the environment cannot be ignored. One of these frequently used insecticides is methyl parathion (MP), an organophosphate compound. In this article, the effect of methyl parathion on lactate dehydrogenase enzyme activity was investigated. Wistar rats were used in experimental studies. Small intestine, kidney, brain and liver tissues were removed 2, 4, 8, 16, 32, 64 and 72 hours after methyl parathion was injected intraperitoneally in male and female rats at a dose of 7mg/Kg. Lactate dehydrogenase enzyme activities were determined from the supernatants obtained. It is noteworthy that lactate dehydrogenase activity was significantly increased in almost all experimental periods in all tissues studied. Small increases in lactate dehydrogenase activity generally do not indicate any harm. However, significant increases can indicate many major conditions such as liver disease, circulatory failure and muscle damage. Our research results and discussion show that methyl parathion can be dangerous to human health.
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    Lineer olmayan elektro elastik (EE) denkleminin ( 𝑮′/𝑮 ) yöntemi ile tam çözümlerinin elde edilmesi
    (Bursa Uludağ Üniversitesi, 2021-06-16) Çelik, Nisa; Özcan, Mehmet Samir; Fen Edebiyat Fakültesi; Matematik Bölümü; 0000-0003-1209-991X; 0000-0002-4835-6765
    Bu çalışmada, dördüncü mertebeden lineer olmayan, Elektro-Elastik (EE) çubuktaki yalnız gezen dalgalara karşılık gelen EE kısmi diferensiyel denklemi ele alındı. Denklemin gezici dalga çözümlerini araştırmak için, ( 𝐺′/𝐺 ) açılım yöntemi kullanıldı. Yöntemin içerdiği farklı durumlar için tam çözümler oluşturuldu. Trigonometrik, hiperbolik ve rasyonel fonksiyonları içeren çözümler elde edildi. Elde edilen çözümlerden biri için kararlılık analizi yapıldı. Son olarak çözümlerin farklı parametrelerdeki bazı özel değerleri için grafikleri, Maple programı ile çizdirilerek, parametreler değiştiğinde grafiklerin değişimi karşılaştırmalı olarak incelenmeye sunulmuştur.
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    The physical properties of CZTS absorber layer for solar cell application
    (Bursa Uludağ Üniversitesi, 2021-01-26) Sarsıcı, Serhat; Kaplan, Hüseyin Kaan; Olkun, Ali; Mohammadigharehbagh, Reza; Akay, Sertan Kemal; Fen Edebiyat Fakültesi; Fizik Bölümü; 0000-0003-1288-0431; 0000-0002-4144-5837; 0000-0003-0061-0573; 0000-0002-0333-487X; 0000-0002-7597-1528
    In this research, the Kesterite structure CZTS absorber layer was deposited on the glass substrate using a vacuum thermal evaporation technique. The morphological, electrical, structural, and optical properties of the produced films were examined utilizing Atomic Force Microscopy, Hall Effect Measurement system, Raman spectroscopy, and UV-Vis spectrophotometer measurements. The Raman analysis confirms the domination of Kesterite phase CZTS on the glass substrate, while secondary and ternary phases are also detected. According to the optical results, the optical bandgap value was calculated as 1.46 eV. The film's electric resistivity was measured as about 67 and 331 Ω.cm at 1 and 100 nA currents, respectively. The carrier concentration values were similarly calculated at 10¹⁵ cm-³for 1 and 100 nA, respectively. Regarding the surface analysis, the RMS roughness value of the film is measured as approximately 5 nm. The RMS roughness and optical bandgap values illustrate the excellent morphological distribution and optical properties and proved that the used deposition technique is one of the best methods.