فهرست مطالب sara sobhani

This study aims to investigate the psychometric properties of the Persian version of the Adaptive Coping with Disease (AKU) questionnaire for Iranian patients with chronic diseases.

In this psychometrics study, participants were 477 patients with chronic diseases aged 16-79 years referred to medical centers in Tehran, Iran, who were selected using a convenience sampling method in 2022. They completed the Persian versions of the AKU, Lazarus’ Ways of Coping questionnaire (WCQ), and the 36-item short form health survey (SF-36). Confirmatory Factor Analysis (CFA) used for assessing the construct validity, while Pearson correlation test was used for determining the convergent validity. Reliability was determined using Cronbach’s alpha. Data analysis was conducted in SPSS software, version 27 and R package Laavan 4.3.2.

The CFA confirmed the six-factor structure of the AKU including Trust to Divine Help, Trust to Medical Help, Search Information and Alternative Help, Conscious Ways of Living, Positive Attitude, and Reappraisal, after excluding items 6 and 19. The fit indices showed the good fit of the CFA model (χ2/df= 2.32, RMSEA= 0.053, and CFI=0.949). The questionnaire had acceptable internal consistency, with Cronbach’s alpha of 0.82 for the overall scale and 0.59-0.81 for the six factors. The average variance extracted (AVE) was 0.53 and the composite reliability coefficient was 0.94, indicating the fit of the model for convergent validity. A significant correlation was found between the Persian AKU score and the scores of WCQ and SF-36, indicating a good convergent validity.

The Persian AKU questionnaire is a valid and reliable tool that can be used in research and clinics on Iranian patients with chronic diseases.

Metal-organic frameworks (MOFS), which are known as porous coordination polymers, have attracted the attention of countless researchers in recent years. These structures are a new class of porous materials, which are formed by connecting metal ions or clusters with polydentate organic ligands by covalent bonds. Compared to other porous compounds such as zeolites, silica, and activated carbon, coordination polymers are considered multifunctional materials with different properties due to the ability to adjust the surface of the cavity, size, shape, and functional groups of the surface of their cavities. For this reason, these compounds are used in different fields, including gas storage and absorption, manufacturing of various sensors, material separation, medical, biological, environmental and catalysis applications.

  A new heterogeneous sulfonated magnetic nanocatalyst decorated with hydrophobic tag denoted as hydrophobic-NBS-γ-Fe2O3, is successfully synthesized and characterized by different methods such as FT-IR, SEM, TEM, TGA and elemental analysis. The catalyst worked well for the efficient synthesis of hexahydroquinolines (HHQs) via the Hantzsch one-pot four-component reactions under solvent-free conditions. The enhanced catalytic activity of hydrophobic-NBS-γ-Fe2O3 could be attributed to the synergistic effects of the anchored sulfonic acid groups and hydrophobic tags on the catalyst surface. The presence of hydrophobic tags well circumvents the problem of water-poisoning of acidic sites in the synthesis of HHQs as a water generating reaction and also facilitates the mass transfer of hydrophobic starting materials to the active acidic sites of the catalyst. Using the solvent-free conditions, good to high yields of the products, use of reusable catalyst, short reaction times and simple work-up procedure make this method favorable from the environmental and economic viewpoints for the synthesis of HHQs. This study represents the first example of using a hydrophobic sulfonated magnetic nanocatalyst towards the one-pot four-component synthesis of HHQs.

In this paper, the applicability of immobilized lanthanum (III) triflate on amine grafted graphene oxide [La(OTf)2-amine grafted-GO] as the first multifunctional catalyst is described for the efficient synthesis of α-aminophosphonates by one-pot three-component reaction of carbonyl compounds, substituted anilines and trialkyl phosphites. Various α-aminophosphonates were synthesized in good to high yields under solvent-free conditions at room temperature. The catalyst was reused five times without significant loss of its activity.

A new immobilized palladium-pyridine complex on γ-Fe2O3 magnetic nanoparticles was synthesized and characterized by SEM, TEM, TGA, ICP, XPS, XRD, FT-IR and CHN analysis. The catalytic activity of synthesized catalyst has been investigated in Heck, Suzuki and Sonogashira coupling reactions using a series of aryl halides. The catalyst was easily isolated from the reaction mixture by an external magnetic field and reused several times with no significant loss of catalytic activity.

The presence of Arsenic in drinking water is the greatest threat to health effects especially in water. The purpose of this study is application of green palladium nanoparticles for removal of trivalent Arsenic from aqueous solutions and also the impact of some factors such as retention time, pH, concentration of palladium nanoparticles and Arsenic concentrations was studied. The values for Arsenic removal from aqueous solutions were measured by furnace atomic adsorption spectrometry (Conter AA700). In the study, Langmuir and Freundlich isotherm models and pseudo-second order kinetic model were studied. The results of  optimization is shown that 0.5 g of nanoparticles can removed %99.8 of Arsenic with initial concentration of  0.5 g/l, in 5 minutes at pH=4. Langmuir model, Freundlich model (R2=0.94) and pseudo-second order kinetic model (R2=0.99) shown high correlation for removing of Arsenic from aqueous solutions. It was found, palladium nanoparticles can be used as an efficient method to remove Arsenic from aqueous solutions in a short time.