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Silicon carbide (SiC) nanotubes as potential sensors for organophosphate molecules
Keyumars Hassanzadeh,Keivan Akhtari,Bahareh Fakhraei,Ghazal Akhtari,Halaleh Hassanzadeh 한국물리학회 2017 Current Applied Physics Vol.17 No.5
The detection and clean-up of the organophosphate (OP) compounds have special importance for those who work in the field of health and governments due to the bad effects of these compounds on human health. In this paper, we have employed the PBE level of theory and ultrasoft pseudopotentials to investigate the ability of silicon carbide nanotubes (SiCNTs) as sensors for organophosphate detection. We found that the binding energy and charge transfer for adsorption of OP on (6,0) SiCNT represents the formation of a strong bond. However, the DE Gap demonstrates the significant changes (12%) in the electronic properties of (10,0) SiC nanotubes which could induce considerable alteration in the SiCNT electrical conductivity. According to the results, the OP can be adsorbed on SiCNT and these types of nanotubes can be promising candidates for detecting organophosphate compounds. The non-equilibrium Green function (NEGF) method shows good performance for the sensor sensitivity.
Lack of Association Between Helicobacter pylori Infection and Oral Lichen Planus
Pourshahidi, Sara,Fakhri, Farnaz,Ebrahimi, Hooman,Fakhraei, Bahareh,Alipour, Abbas,Ghapanchi, Janan,Farjadian, Shirin Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.5
Oral lichen planus is a premalignant chronic inflammatory mucosal disorder with unknown etiology. It is a multifactorial disease and in addition to genetic background, infections, stress, drug reactions are suggested as risk factors. Helicobacter pylori which is involved in development of many gastrointestinal lesions may also be implicated in oral lichen planus induction. This is of clear importance for cancer prevention and the present study was performed to determine any association between H. pylori infection and oral lichen planus in southwestern Iran. Anti H. pylori IgG levels were determined in 41 patients and 82 sex-age matched controls. The results showed no association between H. pylori infection and oral lichen planus (51% in patients vs. 66% in control). or any of its clinical presentations.