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Adsorption of hexavalent chromium by metal organic frameworks from aqueous solution
Afshin Maleki,주상우,Bagher Hayati,Maryam Naghizadeh 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.28 No.-
A metal–organic frameworks (MOFs) based on copper-benzenetricarboxylates is applied to theadsorption of hexavalent chromium from aqueous solution. Characterization of Cu-BTC was achieved byXRD, SEM micrographs, nitrogen adsorption–desorption analysis and FT-IR spectra. The kineticcharacteristics and thermodynamic parameters are also analyzed. The experimental isotherm data areanalyzed using Langmuir and Freundlich isotherm equations. Thermodynamic parameters arecalculated by the Gibbs free energy function, confirming that the adsorption process was spontaneousand accompanied by exothermic. The maximum removal has been achieved at pH = 7.0. Possiblemechanism and adsorption behavior of hexavalent chromium onto Cu-BTC are investigated.
Larijani, Mona Sadat,Bahiraei, Narges,Nikbin, Mehri,Mohajel, Nasir,Rad, Leila Naghizadeh,Baghbani, Fahimeh,Mapar, Maryam,Sadat, Seyed Mehdi Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.8
Infection with the hepatitis C virus is a major public health concern which can lead to carcinoma and liver failure. It has been shown that single nucleotide polymorphisms can affect the level of gene activity of tumor necrosis factor (TNF) which has an important role, especially in viral infections which can lead to apaptosis of infected hepatocellular cells. We investigated the impact of three possible genotypes for rs1800629 or A/G single nucleotide polymorphism located downstream of $TNF{\alpha}$ gene promoter in groups of control (n=76) and chronic hepatitis C patients (n=89) focusing on the response to treatment among sensitive and resistant groups. Genomic DNA was extracted from $500{\mu}l$ prepheral whole blood and PCR and RFLP were used to amplify the region of interest and genotyping. With statistical analyzes a p-value <0.05 was considered meaningful. There was no significant difference in distribution of possible three genotypes among healthy individuals and patients (P=0.906, OR=1.194, CI=0.063-22.790). However, the frequency of G allele was higher in patients whereas A allele was more common among healthy individuals (p<0.0001). Further studies with more samples seem to be necessary.