2021 Cilt 2 Sayı 1

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

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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; Bursa Uludağ Üniversitesi/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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    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; Bursa Uludağ Üniversitesi/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.