mohsen ghorbani

In this study, polyaniline nanocomposite with aluminum oxide (PANI/Al2O3) was synthesized in situ polymerization method and the anti-corrosion ability of nanocomposite was investigated. Products were identified by chemical analysis of Fourier Transform InfraRed (FT-IR) spectroscopy, X-ray crystallography (XRD), and thermal weighing calorimetric analysis (TGA). Also, anti-corrosion properties were analyzed by Open Circuit Potential (OCP)analysis, Electrochemical Impedance Spectroscopy (EIS), and potentiodynamic polarization curves. To investigate anti-corrosion performance, different percentages of nanocomposites (3, 6, 9, and 12 %) were added to industrial paint and applied to steel sheets as a coating. The results of corrosion performance illustrated that the steel sheets coated with PANI/Al2O3 nanocomposites along with the paint, have less corrosion compared to the samples of pure steel sheets and the cases coated with PANI/Al2O3 nanocomposites. Also, the 6 % coating containing PANI/Al2O3 nanocomposite along with paint on steel sheets showed the best anti-corrosion properties. The open-circuit potential analysis results make it clear that the coatings containing PANI/Al2O3 nanocomposite with paint have a higher performance compared to pure paint coatings in 3 wt% NaCl solution. EIS analysis revealed resistance of the coating containing 6 % PANI/Al2O3 along with the paint is more than other samples in 3 % NaCl solution.

Aging is a biological phenomenon, natural and one of the stages of life, and one of the indisputable facts of aging is the approach of death. The purpose of this research was to examine the mediating role of attachment to God in the relationship between religious coping strategies and death anxiety in older individuals. This research is part of descriptive-correlative research and cross-sectional research method and structural equation modeling (SEM). The statistical sample for this research includes all elderly people living in Tehran from May to July 2023. The sampling method in this study was a multistage cluster method. The researcher chose a sample size of 350 people and finally the data of 298 people were analyzed. Research instruments included Pargament's Religious Coping Styles Questionnaire (R-Cope), Templar's Attachment to God Inventory (AGI), and Templer's Death Anxiety Survey (DAS). SPSS-27 software was used to analyze descriptive statistics and SmartPLS 4 software was used to analyze data trends and standard coefficients. Similarly, the Sobel test was used to test the significance of the mediator variables.The direct effect of positive religious coping on attachment to God was significant (β=0.728, P<0.001). The effect of negative religious coping on death anxiety was positive and significant (β=0.131, P=0.036). The results of this study suggest examining the mediating role of attachment to God in the relationship between religious coping strategies and death anxiety in older individuals.

 Today, health psychologists seek to improve the performance of patients with type 1 diabetes and increase their well-being through increasing their adherence to self-care behavior. The purpose of this study was to determine the effectiveness of psychological well-being on optimism and self-care behaviors in patients with type 1 diabetes.

 The current study was a quasi-experimental study with a pretest-posttest design and a control group. The statistical population included all adolescents with type 1 diabetes who were members of the Bandar Abbas Diabetes Association in 2022. Through purposeful sampling, ‎30 adolescents with type 1 diabetes were selected and randomly (odd and even numbers) divided into intervention (15 participants) and control groups (15 participants). Psychological well-being education was presented to the experimental group in 10 weekly 90-minute group sessions. In contrast, the control group did not receive any interventions. The research tools include the Revised Life Orientation Test (LOT-R) (Shier & Carver, 1985) and Revised Diabetes Self-Management Questionnaire ‎‎(DSMQ-R)‎ (Tolbert et al., 2000). Multivariate analysis of covariance (MANCOVA) was used in the current study (P < 0.05). All statistical analyses were performed in SPSS software.

 The findings of this study showed that psychological well-being training significantly increased optimism (F = 25.43; P < 0.001) and self-care behaviors (F = 29.76; P < 0.001).

 It can be concluded that psychological well-being intervention was beneficial for patients with type 1 diabetes and it showed promising effects on clinically relevant outcomes.

It is important to recognize and use the strengths of children with oppositional defiant disorder (ODD). This study assessed whether strength-based intervention is effective on subjective well-being and psychological capital in children with ODD. 

This research was a quasi-experimental study with a pre-test and post-test design with a control group. The statistical population included 30 students with ODD in discreet six, which were selected through multi-stage clustering in Tehran during the academic year 2022. Then, the individuals were randomly assigned to the experimental and control groups (each group: n=15). The subjective well-being and Luthans’ psychological capital (PCQ) questionnaires were administered. For the experimental group, a strength-based intervention was administered in eight sessions of 75 minutes per week, while the control group received no treatment. The data were analyzed using MANOVA and SPSS software, version 26. 

The strength-based intervention had positive effects on subjective well-being (F1, 28=23.42, P<0.001) and psychological capital (F1, 28=28.12, P<0.001) in children with ODD. 

This type of approach builds on clients’ strengths, seeing them as resourceful and resilient when they are in adverse conditions. This study encourages new evidence for the efficacy of a strength-based intervention.

To evaluate the spiral chest computed tomography (CT) scan findings in patients with multipletrauma during the COVID-19 pandemic. This retrospective study was performed on multiple trauma patients admitted to a tertiary hospital inthe north of Iran in 2020. All patients with multiple trauma who had undergone a chest spiral CT were includedin this study. Furthermore, the data analysis was performed through descriptive and analytical statistics usingSPSS software. A total of 600 patients were included over the study period. The mean age of patients was 48.2±20.3years. Of the total, 496 (65.3%) patients had blunt chest injuries, and 104 (34.7%) had penetrating chest injuries.Falling was the most common mechanical cause of chest trauma in 270 patients (45%). Surgical interventionswere performed in 110 (18.3%) patients. A total of 276 (46%) patients had chest injuries identified by CTscans. Many patients (15.6%) had ground-glass lung opacity in the CT scan reports. Lung consolidation,pneumothorax, lung contusion, hemothorax, and rib fractures were the most common. Due to the high frequency of typical findings in spiral CT scan examinations, obtaining a reliablehistory of trauma severity, injury mechanism, and a detailed physical examination is recommended beforeprescribing a CT scan for patients.

In this study a new type of fault current limiter is introduced. It has been named multi-functional capacitive fault current limiter (MCFCL). as a variable capacitor, its function is to control active power flow in normal conditions as well as improving the capability of low voltage rid-through (LVRT) in fault operating conditions. The new structure has been proposed based on the capacitive bridge-type fault current limiter (BFCL) and the RL-type fault current limiter (FCL), which is modified to enhance low-voltage ride-through capability. To assess the efficacy of proposed fault current limiter, the time domain simulations were executed in PSCAD/EMTDC software and its function is compared with the RL-type SSFCLs in normal and symmetrical or asymmetrical fault conditions. Also its efficacy has been evaluated in a fixed speed based wind farm. The result of simulations showed that the MCFCL is not only able to control the power flow in normal operating condition, but also improves the LVRT performance in fault operating condition in the wind farms.

In this study a new type of fault current limiter is introduced. It has been named multi-functional capacitive fault current limiter (MCFCL). as a variable capacitor, its function is to control active power flow in normal conditions as well as improving the capability of low voltage rid-through (LVRT) in fault operating conditions. The new structure has been proposed based on the capacitive bridge-type fault current limiter (BFCL) and the RL-type fault current limiter (FCL), which is modified to enhance low-voltage ride-through capability. To assess the efficacy of proposed fault current limiter, the time domain simulations were executed in PSCAD/EMTDC software and its function is compared with the RL-type SSFCLs in normal and symmetrical or asymmetrical fault conditions. Also its efficacy has been evaluated in a fixed speed based wind farm. The result of simulations showed that the MCFCL is not only able to control the power flow in normal operating condition, but also improves the LVRT performance in fault operating condition in the wind farms.

In this study, pectin/γ-Fe2O3/gl nanocomposite was synthesized using a single-step chemical precipitation method and used as an eco-friendly adsorbent to remove Cd2+ and Pb2+ from aqueous solution. The nanocomposite was characterized by FE-SEM, EDX, FTIR, XRD, VSM, and TEM analyses. The effect of various parameters such as solution pH (2 to 5), contact time (0 to 60 min), initial ion concentration (10 to 200 mg. L-1), and adsorbent dosage (0.1 to 0.4 g.L-1) on the removal efficiency was investigated. The maximum adsorption capacity of Cd (II) in the conditions (pH: 5, dose of adsorbent: 0.2 g.L-1, and contact time:40 min, initial concentration: 50 mg.L-1 ) and Pb (II) in the conditions (pH: 4.5, dose of adsorbent: 0.1g.L-1, and contact time:30min, initial concentration: 50 mg.L-1 ) was 470 and 325 mg. g-1, respectively. The adsorption kinetics was studied using several kinetic models including Langmuir isotherm, Freundlich isotherm, Sips isotherm, and Temkin isotherm. Results indicated that the adsorption mechanism could be well represented by the pseudo-second-order model. The equilibrium data of Cd (II) and Pb (II) adsorption were reasonably described by the Sips and Langmuir isothermal models. The positive value of delta H and negative values of delta G exhibit the endothermic and spontaneous nature of the adsorption process.

Permian stratigraphic sequences are widely distributed throughout Iranian, making this one of the best locations in the world to study15 this geological time interval. Nevertheless, some units lack detailed biostratigraphic characterization which is essential for16 palaeogeographic reconstructions. This preliminary study comprises a palynological assessment of a Permian stratigraphic section17 cropping out in the Ajabshir area (SW Azerbaijan, NW Iran). The continuous and relatively well-exposed Ajabshir section comprises18 Unit 3 of the Dorud Formation and the Nesen and Ruteh formation In this area, the Dorud Formation starts with the Unit 319 unconformably overlying the Mila Formation, with its lower units missing. Unit 3 (48 m thick) is characterized by sandstones with20 siltstones and shale intercalations and an upward increase of limestones. The overlying Ruteh Formation (192 m thick) consists21 mainly of carbonates with scattered coarse sandstone intercalations and dolomitic limestones

Research subject: 

Selectivity and permeability are the major parameters of polymeric membranes in gas separation process. Hence, nowadays in order to improve aforementioned parameters, modification and enhancement issues for such membrane have been highly noticed.

Research approach: 

In this study, in order to improve the performance of polymeric membranes, the two-component blend membranes containing Pebax®1657 and PVA were synthesized for CO2 separation. The effect of different PVA concentrations within the Pebax matrix on structure, morphology and gas separation properties of resultant membranes was investigated. The chemical bonds, crystallinity and cross-sectional morphology studied through, Fourier transform infrared (FTIR), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM), and were utilized.

The results of the thermal analysis indicated an increase in crystallinity and also glass transition temperature in presence of 5 – 15 wt.% PVA, while the membrane crystallinity decreased by increasing the PVA content up to 20 wt.%. FESEM images demonstrated a uniform cross-section without any cracks and defects for neat Pebax membrane but by adding PVA to Pebax matrix, appeared cracks and cave structures on the cross- section of blend membranes. The CO2/CH4 separation performance of membranes was measured using a constant volume set up at 30°C and feed pressure of 2, 6 and 10 bar. The obtained results revealed that the CO2 permeability in blend membranes improved as the PVA content increased within the membrane. The best obtained CO2 permeability was 204.64 Barrer which gained by Pebax/PVA (20wt.%) at feed pressure of 10 bar. Moreover, the highest selectivity of CO2/N2 for blend membrane with 15 wt.% of PVA was about 100.21 at 10 bar and 30°C.

In this study, carbon nanotubes coated with iron oxide nanoparticles were synthesized by a co-deposited simultaneous method with initial salt ratios of 2 to 1 and 4 to 1. In order to study the structural, surface and magnetic properties, electron microscopy, magnetic residue, infrared Fourier transform, Raman, x-ray diffraction, nitrogen adsorption-desorption, and zero-point calculations were studied. The results obtained from the structural analysis indicate that iron oxide nanoparticles with 12.2 nm and 13.5 nm are in the range of 2 to 1 and 4 to 1 on carbon nanotubes, respectively. Also, for these proportions, the behavior of superparamagnetic with saturated magnetization was 11.48 mg/g and 27.97 emu/g, respectively. The results showed that, by choosing the right method and optimizing the effective parameters in the method of synthesis of magnetic carbon nanotubes, it is possible to directly change their surface properties and, as a result, nanostructures with specific surface properties in the “Wide” range of laboratory conditions.

Increasing environmental pollution caused by the discharge of wastewater caused serious problems because of the effect on health, especially the brain and liver and biological accumulation of it. The aim of this study was to assess the efficacy of magnetic graphene oxide as a sorbent for the removal of copper from aqueous solutions in the laboratory.
Physical characteristics and morphology of synthesized adsorbent wereanalyzed using FT-IR, SEM, XRD, EDX, VSM, BET and TEM techniques. In this study, the effects of impact, including the effect of time (30-180), temperature (20-60), concentration (60-500) and pH (1-5) for the removal of copper with design of experiments have been optimized. For this purpose, 30 experiment and response surface method using a central composite design software Design Expert 7.0.0 Trial was developed on five levels.
The Langmuir and Freundlich isotherm were absorbed. The results showed that Langmuir and Freundlich isotherm data was fitted with both models. By utilizing the model Langmuir maximum adsorption capacity was 99 mg g-1. Pseudo-first-order and pseudo-second order kinetic data were used to describe the pseudo-second order model was the result of fitted. Thermodynamic parameters indicated that the adsorption process of Cu2 ions was spontaneous, feasible, endothermic and physical in nature.
The present study concludes that the magnetic graphene oxide could be employed as low-cost adsorbent for the removal of Cu2 ions from aqueous solutions due to fast kinetics, high adsorption capacity.

Nano-size maghemite (γ-Fe2O3) particles were prepared in one step using ultrasound radiation. The obtained nanoparticles were characterized by SEM, TEM , XRD, FTIR, and VSM. The results revealed that the synthesized nanoparticles were spherical, mono-dispersed and uniform. Furthermore, the crystalline structure of nanoparticles endorsed by X-ray diffraction study. The FTIR spectra have provided information on the structure of the surface of nanoparticles. TEM analysis showed that the average particle size of the γ -Fe2O3 are about 15 nm. The formed nanoparticles exhibited unique magnetic behavior with magnetic saturation values of~68 emu/g. By utilizing properties of synthetic γ -Fe2O3 nanoparticles, a three-dimensional incompressible nanofluid flow in a confined sinusoidal converging jet in turbulent flow regime was numerically investigated. Results were obtained for the flow structure at different Reynolds numbers for steady asymmetric jet development at various values of the duct-to-jet width ratio (aspect ratio),different amplitudes and different volume fractions of nanoparticles. The results showed that by increasing the Reynolds number, aspect ratio, amplitude and volume fraction of γ -Fe2O3 nanoparticles, the averaged Nusselt number will increase.

The aim of this study was to compare radionuclide scintigraphy and ultrasonography in the diagnosis of gastroesophageal reflux in 2-13-year-old children who referred to a pediatric clinic in Isfahan city, Iran, during 2014-2015.
In across-sectional study, 150 children aged 2 to13 years with symptoms of gastroesophageal reflux were assessed using ultrasound and radioisotope scan. All of them were treated using the drug omeprazole for 6 weeks; and finally, the diagnostic values were compared between the two methods.
Findings: Sensitivity, specificity, and negative and positive predictive values were 96.1%, 68.2%, 94.6%, and 75.0%, and 85.2%, 45.5%, 90.1%, and 34.5%, in radioisotope scan and ultrasonography, respectively.
Radioisotope scan and ultrasonography do not have enough accuracy in diagnosis of gastroesophageal reflux in children. Using empirical therapy in diagnosis is depended on the duration of disease, too. Using combination of ultrasound and radioisotope scans is recommended in long-duration disease or when the case is suspicious to other diseases such as tumors and malignancy.

To study the implications of various elegies for Imam Hussein in the poetry of Arabs and non-Arabs is of great importance to many researchers of comparative literature. In this context, the main feature of the elegies is addressing the sufferings of Imam Hussein, and crying upon his pains. Sharif Razi, a poets of Arabic literature in the fourth century AH, and Mohtasham Kashani, a poets of Persian literature in the tenth century, are among Shiite poets who share characteristics regarding elegies on Imam Hussein. This study tries to compare and contrast the elegies of these poets through a descriptive-analytical method.the results are represented in charts.

Mercury is one of the most toxic metals present in the environment. Adsorption has been proposed among the technologies for mercury adsorbent. The kinetics of adsorption depends on the adsorbent concentration, and the physical and chemical characteristics of adsorbent. In this study we were used a novel adsorbent, magnetite-polyrhodanine core- shell nanoparticles, for removing Hg(II) from aqueous solution. The effect of pH, initial Hg(II) concentration, initial adsorbent concentration and contact time on the efficiency of Hg(II) removal were investigated systematically by batch experiments. The maximum adsorption capacity was obtained 29.14 mg g-1 at PH=6.5 and 25°C with 10 g L-1 nano adsorbent. The kinetic data of adsorption of Hg(II) ion on the synthesized adsorbent were best described by a pseudo- second- order equation, indicating their chemical adsorption. The Freundlich, Langmuir and Temkin isotherms were used to modeling of mercury adsorption on Hg(II) in aqueous medium which modeled best by the Freundlich isotherm is whole concentration rage.

Finding the perfect absorbent for the removal of a color with higher absorbent capacity and attract more colors, and determining the optimum conditions for the use of absorbent for textile factories and the environment is of particular importance. The purpose of this study was to evaluate and optimize the adsorption of Astrazon blue cationic dye from aqueous solution using sulfunated styrene-co-divinylbenzene resin. The variable amount of time, the adsorbent dosage and dye concentration were optimized by experimental design method. Numbers of 15 experiment was designed with Response Surface Methodology (RSM) and use the Box-Behnken design (Box-Behnken) with Design Expert 7.0.0 Trial software by three factors: time, adsorbent dosage and dye concentration in three levels (, 0, 1) with three- center points. Each experiment was done with a certain dose of adsorbent in 10 mL solution containing cationic dye and the dye adsorbed was measured.

This article attempts to examine the effects of scarcity and impurity of drugs on changing the consumption pattern from low-risk to high-risk. The theoretical framework of the study is based on combination of action theory, Homans’s exchange theory and the theory of Pete Schwartz. The survey method is applied in this study and in order to collect the data, a questionnaire submitted to high-risk drug users in Bojnourd prison and Samen clinic patients. This is to conclude that based on high-risk drug users statements, the scarcity of the low risk drugs like opium and their impurities lead to a changing the consumption patterns.

Polyaniline (PANI) is one of the most interesting conducting polymers due to its low cost and easy availability of raw materials، easy synthesis، good environmental stability and controllable electrical conductivity and redox properties. In recent years it has been shown that electrically conducting polymers such as polyaniline in integrated coating applications are able to protect steel from corrosion due to formation of passive oxide layer on the metal surface. In this report، a nanocomposite of polyaniline–nanoSiO2 (PSC) has been prepared by using poly (vinyl alcohol) (PVA) as surfactant and ammonium persulfate as an oxidant in the aqueous media. The prepared materials were characterized and compared by Fourier transformation infrared (FTIR) spectroscopy، transmission electron microscopy (TEM) and X-ray diffraction (XRD). In this method different concentrations (1، 3 and 5wt%) of emulsion nanocomposite were each mixed with polyvinyl acetate (PVAc) binder. SEM image showed good distribution of nanocomposite in the polyvinyl acetate matrix. The anti-corrosive properties of this blend on carbon steel in 3. 5% NaCl and HCl (1M) were evaluated by Tafel slope analysis. The corrosion inhibition performance study was carried out at room temperature in aqueous solution of 1. 0 M HCl and 3. 5 % NaCl by using Tafel method. Experiments were carried out in a conventional three electrode cell assembly using Autolab Potentiostat/Galvanostat. The results showed that addition of nanocomposite to PVAc decreased the corrosion rate and corrosion current density. According to the results، the blend of 3 wt% of this nanocomposite with polyvinyl acetate has the best corrosion protection for steel St37 in both media.