Azarbaijan Shahid Madani University

About: Azarbaijan Shahid Madani University is a education organization based out in Tabriz, Iran. It is known for research contribution in the topics: Graphene & Nanocomposite. The organization has 1477 authors who have published 3186 publications receiving 30278 citations. The organization is also known as: Azarbaijan University.

3D Numerical Investigation of Thermal Characteristics of Nanofluid Flow through Helical Tubes Using Two-Phase Mixture Model

Abstract: This article presents numerical investigation of the heat transfer behavior of Al2O3/water nanofluid flow through helical tubes. Temperature-dependent thermal conductivity and the Brownian motion of nanoparticles in the nanofluid have also been taken into account. The results obtained indicate that the addition of nanoparticles into the base fluid will enhance the overall heat transfer coefficient in helical tubes. It was also concluded that the amount of increase in overall heat transfer coefficient with the addition of nanoparticles to the base fluid in a helical tube with smaller pitch circle diameter is more than a helical tube with higher pitch circle diameter.

Even and odd $\lambda$-deformed binomial states: minimum uncertainty states

Abstract: Following the lines of the recent papers (Ann. Phys. 362, 659670 (2015) and Mod. Phys. Lett. A 37, 1550198 (2015)), we introduce even and odd $\lambda$ -deformed binomial states ( $\lambda$ -deformed BSs) $ \vert M,\eta,\lambda\rangle_{\pm}$ , in which for $\lambda =0$ , they lead to ordinary even and odd binomial states (BSs). We show that these states reduce to the $\lambda$ -deformed cat-states in the special limits. We establish the resolution of identity property for them through a positive definite measure on the unit disc. The effect of the deformation parameter $\lambda$ on the nonclassical properties of introduced states is investigated numerically. In particular, through the study of squeezing, we show that in contrast with the odd BSs, the odd $\lambda$ -deformed BSs have squeezing. Also, we show that the even and odd $\lambda$ -deformed BSs minimize the uncertainty relation for large values of $\lambda$ .

Dual-responsive semi-IPN copolymer nanogels based on poly (itaconic acid) and hydroxypropyl cellulose as a carrier for controlled drug release

Abstract: Dual-responsive nanogels were prepared by polymerization of itaconic acid (IA) and copolymerization with methacrylic acid (MA) in aqueous solution of hydroxypropyl cellulose (HPC) and cross-linking with N, N′-methylenebisacrylamide (MBAm) through an easy and green process. FTIR spectroscopy, TEM, AFM, DLS and zeta potential studies confirmed the semi-interpenetrating (semi-IPN) polymer network structure of nanogels. The LCST of HPC was increased to a higher temperature than HPC’s intrinsic LCST, while the presence of the MA comonomer improved the hydrophobicity of the copolymer and reduced LCST to about body temperature and suppressed the excessive nanogel aggregation. It was found that the concentration of reactants impacted the process of nanogel formation. Additionally, an increasing of cross-linker concentration led to a reduced size of HPC nanogels. Besides, the diameter of nanogels was changed with the temperature and pH. TEM and AFM photographs of copolymer nanogels illustrated that the nanoparticles with small diameters (<100 nm) were prepared. With loading the doxorubicin into the copolymer nanogels, the particle size became larger (about 150 nm) and due to the electrostatic interaction of the cationic drug with anionic particles, the zeta potential was increased. Drug release processes were followed at pH = 5.0 and 7.4 and with 37- and 41-°C temperatures, respectively. The maximum in-vitro release studies of drug-loaded nanogels, which is 91% for the pH 5.0 buffer solution at 41 °C, demonstrated the temperature- and pH-sensitivity of prepared copolymer nanogels.

Effects of freeze and cold stress on certain physiological and biochemical traits in sensitive and tolerant barley (Hordeum vulgare) genotypes

Abstract: An experiment was performed as a split-plot design based on a randomized complete block (RCB) with three replicates. The aim was to explore physiological traits, catalase (CAT) and peroxida...