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Iravani, Shahrokh,Kashfi, Seyed Mohammad Hossein,Azimzadeh, Pedram,Lashkari, Mohammad Hossein Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.22
Background: Colorectal cancer is the third most common type of cancer in males and the second in females in Iran. Males are more likely to develop CRC than women and age is considered as a main risk factor for colorectal cancer. Prevalence of colorectal cancer has been increasing in Asian countries. Aim: The object of this study was to determine the clinical and pathology characteristics of colorectal polyps in Iranian patients and to investigate the variation between our populations with other populations. Materials and Methods: A total of 167 patients with colorectal polyps were included in our study. All underwent colonoscopy during 2009-2013 and specimens were taken through polypectomy and transferred to pathology. All data in patient files including pathology reports were collected and analyzed by SPSS 16 software. A two-tailed test was used and a P-value of < 0.05 was considered significant. Results: Mean age of participants was $57{\pm}15$. Some 84 were females (50.3%) and 83 males (49.7%). Total of 225 polyps were detected which 119 (52.9%) were in males and 106 (47.1%) were in females. Solitary polyps were observed in 124 patients (74%), 26 (15.6%) had two polyps and 17 (10.1%) with more than two polyps (three to five). Rectosigmoid was the site of most of the polyps (63.1%), followed by 19.6% in the descending colon, 7.6% in the transverse, 5.8% in the ascending, and 3.1% in the cecum, data being missing in two cases. Conclusions: Recto sigmoid was site of most of the polyps. The most prevalent type of lesion was adenomatous polyps detected in 78 (34.7%). Mixed hyperplastic adenomatous type observed in 70 (31.1%). This high prevalence of adenomatous polyps in Iranian patients implies the urgent need for screening plans to prevent further healthcare problems with colorectal cancer in the Iranian population.
Iravani, Effat,Nami, Navabeh,Nabizadeh, Fatemeh,Bayani, Elham,Neumuller, Bernhard Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.11
The reaction of $LnCl_3{\cdot}7H_2O$ [Ln = La (1), Ce (2)] with salicylic acid (HL) and 1,10-phenanthroline (Phen) at $20^{\circ}C$ in $H_2O$/ethanol gave after work-up and recrystallization two novel lanthanide complexes with general formula $[Ln(Phen)_2(L)_3(HL)]{\cdot}H_2O$. Compounds 1 and 2 were characterized by IR and UV-Vis spectroscopy, TGA, CHN as well as by X-ray analysis. According to these results, compounds 1 and 2 are isostructural and contain $Ln^{3+}$ ions with coordination number nine. Complexes 1 and 2 consist of two Phen, one neutral HL and three L anions (two L anions act as monodentate ligands and the third one is chelating to $Ln^{3+}$). Thermal decomposition led to primary loss of the Phen molecules. Then HL molecules and finally L moieties left the material to give $Ln_2O_3$.
Shade reproduction and the ability of lithium disilicate ceramics to mask dark substrates
Iravani, Maryam,Shamszadeh, Sayna,Panahandeh, Narges,Sheikh-Al-Eslamian, Seyedeh Mahsa,Torabzadeh, Hassan The Korean Academy of Conservative Dentistry 2020 Restorative Dentistry & Endodontics Vol.45 No.3
Objectives: This study aimed to evaluate the ability of lithium disilicate ceramics to reproduce the A2 shade and to mask A4 substrates. Materials and Methods: Twenty-four discs (8 mm in diameter, shade A2) of high translucency (groups 1-3) and low translucency (groups 4-6) of IPS e.max ceramic with different thicknesses (0.5, 0.75, and 1 mm) were fabricated as monolithic structures. In addition, discs of medium opacity (group 7-8) with different core/veneer combinations (0.3 mm/0.7 mm and 0.5 mm/0.5 mm) were fabricated as bilayer structures. Specimens were superimposed on an A4 substrate (complex). The color changes of the complex were measured using a spectrophotometer on a black background, and the ΔE values of the complex were compared with either the A4 substrate or the A2 shade tab. One-way analysis of variance, the Tukey honest significant difference test, and the Fisher test were used to analyze the data (p < 0.05). Results: Significant between-group differences were found for comparisons to both the A4 substrate and the A2 shade (p < 0.05). When compared with the A4 substrate, the ΔE values in all groups were in the non-acceptable range. When compared with the A2 shade, the ΔE values in all groups, except groups 2 and 3, were in the clinically acceptable range. Conclusions: All translucencies and thicknesses masked the underlying dark substrate. However, the low-translucency IPS e.max Press better reproduced the A2 shade.
Omid Iravani,Ern Wei Tay,Boon Huat Bay,Yee Kong Ng 대한해부학회 2014 Anatomy & Cell Biology Vol.47 No.4
Ureteric stones are a common cause of obstruction of the urinary tract, usually presenting with characteristic signs and symptoms, such as acute ureteric colic and hematuria. Occasionally, stones may present with non-specific symptoms such as low back pain and remain unidentified, leading to stone growth, chronic ureteric obstruction and complications such as hydronephrosis and renal damage. Here, we report a large ureteric stone in a cadaver with complete obstruction at the left ureterovesical junction, resulting in severe dilatation of the left ureter and renal pelvis.
Effat Iravani,Navabeh Nami,Fatemeh Nabizadeh,Elham Bayani,Bernhard Neumüller 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.11
The reaction of LnCl3·7H2O [Ln = La (1), Ce (2)] with salicylic acid (HL) and 1,10-phenanthroline (Phen) at 20 oC in H2O/ethanol gave after work-up and recrystallization two novel lanthanide complexes with general formula [Ln(Phen)2(L)3(HL)]·H2O. Compounds 1 and 2 were characterized by IR and UV-Vis spectroscopy, TGA, CHN as well as by X-ray analysis. According to these results, compounds 1 and 2 are isostructural and contain Ln3+ ions with coordination number nine. Complexes 1 and 2 consist of two Phen, one neutral HL and three L anions (two L anions act as monodentate ligands and the third one is chelating to Ln3+). Thermal decomposition led to primary loss of the Phen molecules. Then HL molecules and finally L moieties left the material to give Ln2O3.
Mohamad Reza Iravani,Nasrin Ghalanni 한국유통과학회 2014 Asian Journal of Business Environment (AJBE) Vol.4 No.3
Purpose ‒ This study aims to analyze changes in attitudes towards women s political leadership and the social factors related to such changes. The study reviews the field of women s political leadership, specifically the political and economic participation of women in the world, and the impact of variables such as the changes in attitude on such participation. Research design, data, and methodology ‒ The population for this study comprises 99 countries that are members of the United Nations and have participated in the third and fifth waves of the World Values Surveys. The sample consists of 31 such countries selected for sampling. Results ‒ This study is a secondary analysis to examine the hypotheses regression and the LISREL model are used. The findings of the study indicate that the correlation between two variables, namely women s political participation and leadership of women, is statistically significant. Conclusions ‒ The changing rate of women s economic participation is also significant. The significance of these coefficients indicates that the results, with a 95% confidence level, can be extended to all member states.
Mohamad Reza Iravani,Nasrin Ghalanni 한국유통과학회 2014 Asian Journal of Business Environment (AJBE) Vol.4 No.4
Purpose ‒ This study aims to analyze changes in attitudes towards women's political leadership and the social factors related to such changes. The study reviews the field of women's political leadership, specifically the political and economic participation of women in the world, and the impact of variables such as the changes in attitude on such participation. Research design, data, and methodology ‒ The population for this study comprises 99 countries that are members of the United Nations and have participated in the third and fifth waves of the World Values S urveys. The sample consists of 31 such countries selected for sampling. Results ‒ This study is a secondary analysis to examine the hypotheses regression and the LISREL model are used. The findings of the study indicate that the correlation between two variables, namely women's political participation and leadership of women, is statistically significant. Conclusions ‒ The changing rate of women's economic participation is also significant. The significance of these coefficients indicates that the results, with a 95% confidence level, can be extended to all member states.
Hamid Javaherian Naghash,Rouhollah Akhtarian,Mohammad Iravani 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.7
Functional polyurethane surfactants (tri-block) were synthesized by addition polymerization of hexamethylenediisocyanate (HMDI), isophorone diisocyanate (IPDI) and 2, 4-toluene diisocyanate (TDI) with poly (propyleneoxide) (PPO) and monoallyl-end-capped poly (ethylene oxide) (PEO). The chemical structure of the polyurethane surfactants(PUS) was confirmed by Fourier transform infrared, 1H NMR and 13C NMR spectroscopy. Then, a series of polyvinylacetate (PVAc) latexes were successfully synthesized by the emulsion copolymerization in the presence of differentPUS. The particle size, amount of coagulum and surface tension were evaluated. These polymeric surfactants werefound to have excellent surface activity. The lowest surface tension of polyurethane surfactant aqueous solutions couldbe reduced to 41.5 dyn/cm for IPDI. All the polyurethane surfactants synthesized had low critical micelle concentrationsand could reduce the surface tension even at very low concentration levels (10−3-10−2 molL−1).