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Investigation of photocatalytic degradation of clindamycin antibiotic by using nano-ZnO catalysts
Mahdi Farzadkia,Kourosh Rahmani,Mitra Gholami,Ali Esrafili,Ayat Rahmani,Hassan Rahmani 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.11
The photocatalytic degradation of clindamycin (CLM) was studied by a batch reactor using UV irradiationand ZnO catalyst. The effects of several parameters such as pH, catalyst loading, light intensity and irradiation timewere evaluated in the removal process. The results showed that the degradation of CLM was effective in alkaline con-ditions. The optimum catalyst loading in an aqueous solution containing 25 mM of CLM and UV lamp of 50W wasobserved at 3.0 g/L of catalyst loading. The process followed pseudo-first order kinetics, and the apparent rate constant(k) decreased with increasing the initial concentration of CLM. The photocatalytic process had higher removal efficiencyin synthetic than actual wastewater in optimum conditions.
( Fatemeh Rahrovani ),( Mohammad Hassan Javanbakht ),( Ehsan Ghaedi ),( Hamed Mohammadi ),( Amir-Hooshang Ehsani ),( Ali Esrafili ),( Mahmoud Djalali ) 한국임상영양학회 2018 Clinical Nutrition Research Vol.7 No.1
Studies have reported different changes in the fatty acid composition of red blood cell (RBC) total lipids in patients with various types of cancer. It has been indicated that n-3/n-6 ratio plays a key role in the general consequence of skin photocarcinogenesis. However, to our knowledge there was no study examining the unsaturated fatty acid profile in basal cell carcinoma (BCC) patients. So, we explore the fatty acid composition of RBCs in newly diagnosed BCC patients in a hospital-based case-control study. This study has been conducted on new case BCC patients in Razi Hospital, Tehran, Iran. Fatty acid concentration in erythrocyte membranes defined as relative values after extraction, purification and preparation, by gas chromatography.Analysis revealed that heptadecenoic acid (p = 0.010) and oleic acid (p < 0.001) was significantly higher in BCC patients in comparison with control group. Among polyunsaturated fatty acids (PUFAs), linoleic acid (LA), and arachidonic acid (AA) were significantly higher in BCC patients (p < 0.001). It has been indicated that n-3 was significantly lower (p = 0.040) and n-6 was significantly higher (p = 0.002) in BCC patients. In addition, total PUFA (p < 0.001) and n-6 PUFAs/n-3 PUFAs (p = 0.002) were significantly higher in BCC patients compared to the control group. Here we indicated that new case BCC patient had significantly higher n-6 PUFA and lower n-3 along with other differences in unsaturated fatty acid in comparison with healthy subjects. Our study provides evidence that lipids are important in BCC development.