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    Extraction and purification of phosphatidylcholine and its potential in nanoliposomal delivery of Eucalyptus citriodora oil

    , Article Canadian Journal of Chemical Engineering ; Volume 100, Issue 10 , 2022 , Pages 2807-2814 ; 00084034 (ISSN) Bahari, M ; Vaziri, A. S ; Alemzadeh, I ; Sharif University of Technology
    John Wiley and Sons Inc  2022
    Abstract
    Phosphatidylcholine (PC) possesses amphiphilic characteristics to form vesicles or liposome nanoparticles and can be utilized to deliver essential nutrients such as proteins, peptide antigens, and essential fatty acids. In this study, an attempt has been made to obtain purified PC and evaluate its potential in nanoliposome synthesis and its corresponding drug release profile. In this regard, four physical separation techniques comprising extraction, precipitation, static, and dynamic adsorption were assessed and applied to purify PC from soybean lecithin. Different solvents and the ratio of lecithin to solvent were used to achieve the highest PC percentage. The results of an HPLC test showed... 

    Effects of sucrose, skim milk and yeast powder on survival of lactobacillus rhamnosus gg encapsulated with alginate during one-week storage at room conditions

    , Article Applied Food Biotechnology ; Volume 9, Issue 3 , 2022 , Pages 251-259 ; 23455357 (ISSN) Khodadadi, P ; Tabandeh, F ; Alemzadeh, I ; Soltani, M ; Sharif University of Technology
    National Nutrition and Food Technology Research Institute  2022
    Abstract
    Background and Objective: During the manufacture and storage of probiotic products, there are always possibilities that probiotics be exposed to harmful stresses such as high temperature, low pH, various osmotic pressures and high oxygen levels, which can decrease the number of living cells. Encapsulation is one of the methods used to protect living cells such as probiotic bacteria from environmental challenges. Up-to-date, various compounds with abilities to protect bacteria during freeze-drying and to increase viability during storage have been identified. In this study, alginate with calcium chloride was used to encapsulate probiotic bacteria using extrusion method. Then, effects of... 

    Design and development of a self-assembling protein nanoparticle displaying PfHAP2 antigenic determinants recognized by natural acquired antibodies

    , Article PLoS ONE ; Volume 17, Issue 9 September , 2022 ; 19326203 (ISSN) Zahedi, F ; Mehrizi, A. A ; Sardari, S ; Alemzadeh, I ; Sharif University of Technology
    Public Library of Science  2022
    Abstract
    Backgrounds In order to move towards the elimination and eradication of malaria in the world, the development of vaccines is inevitable. Many modern vaccines are based on recombinant technology; however, they may not provide a fully protective, long-lasting immune response. One of the strategies to improve recombinant vaccines is designing the nanovaccines such as self-assembling protein nanoparticles (SAPNs). Hence, the presentation of epitopes in a repeat array and correct conformation should be considered. P. falciparum generative cell-specific 1 (PfGCS1) is a main transmission-blocking vaccine candidate with two highly conserved fragments, HAP2-GCS1 and cd loop, inducing partial malaria... 

    Curcumin sustained release with a hybrid chitosan-silk fibroin nanofiber containing silver nanoparticles as a novel highly efficient antibacterial wound dressing

    , Article Nanomaterials ; Volume 12, Issue 19 , 2022 ; 20794991 (ISSN) Heydari Foroushani, P ; Rahmani, E ; Alemzadeh, I ; Vossoughi, M ; Pourmadadi, M ; Rahdar, A ; Díez Pascual, A. M ; Sharif University of Technology
    MDPI  2022
    Abstract
    Drug loading in electrospun nanofibers has gained a lot of attention as a novel method for direct drug release in an injury site to accelerate wound healing. The present study deals with the fabrication of silk fibroin (SF)-chitosan (CS)-silver (Ag)-curcumin (CUR) nanofibers using the electrospinning method, which facilitates the pH-responsive release of CUR, accelerates wound healing, and improves mechanical properties. Response surface methodology (RSM) was used to investigate the effect of the solution parameters on the nanofiber diameter and morphology. The nanofibers were characterized via Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electron... 

    Unraveling cancer metastatic cascade using microfluidics-based technologies

    , Article Biophysical Reviews ; Volume 14, Issue 2 , 2022 , Pages 517-543 ; 18672450 (ISSN) Hakim, M ; Kermanshah, L ; Abouali, H ; Hashemi, H. M ; Yari, A ; Khorasheh, F ; Alemzadeh, I ; Vossoughi, M ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2022
    Abstract
    Cancer has long been a leading cause of death. The primary tumor, however, is not the main cause of death in more than 90% of cases. It is the complex process of metastasis that makes cancer deadly. The invasion metastasis cascade is the multi-step biological process of cancer cell dissemination to distant organ sites and adaptation to the new microenvironment site. Unraveling the metastasis process can provide great insight into cancer death prevention or even treatment. Microfluidics is a promising platform, that provides a wide range of applications in metastasis-related investigations. Cell culture microfluidic technologies for in vitro modeling of cancer tissues with fluid flow and the... 

    A new insight to deformability correlation of circulating tumor cells with metastatic behavior by application of a new deformability-based microfluidic chip

    , Article Analytica Chimica Acta ; Volume 1186 , 2021 ; 00032670 (ISSN) Hakim, M ; Khorasheh, F ; Alemzadeh, I ; Vossoughi, M ; Sharif University of Technology
    Elsevier B.V  2021
    Abstract
    Isolation and characterization of circulating tumor cells (CTCs) found in blood samples of cancer patients have been considered as a reliable source for cancer prognosis and diagnosis. A new continuous microfluidic platform has been designed in this investigation for simultaneous capture and characterization of CTCs based on their deformability. The deformability-based chip (D-Chip) consists of two sections of separation and characterization where slanted weirs with a gap of 7 μm were considered. Although sometimes CTCs and leukocytes have the same size, the deformability differs in such a way that can be exploited for enrichment purposes. MCF7 and MDA-MB-231 cell lines were used for the... 

    Clinical uses and survival study of free and encapsulated probiotic bacteria in fruit juices: A review

    , Article Applied Food Biotechnology ; Volume 8, Issue 3 , 2021 , Pages 161-179 ; 23455357 (ISSN) Alemzadeh, I ; Afarin, M ; Dehghan, A ; Sani, M. A ; Teimouri, M ; Seilani, F ; Abbasi, P ; Vaziri, A. S ; Sharif University of Technology
    National Nutrition and Food Technology Research Institute  2021
    Abstract
    Background and Objective: Probiotics are dietary supplements with potential health benefits for humans when consumed regularly at appropriate quantities. The latest evidence shows possible beneficial effects of probiotics in COVID-19 treatment. Interests in probiotic consumption have led to provide products such as probiotic juices with vitamins, minerals, prebiotics and appropriate levels of probiotics to the market in free and encapsulated forms, which are not fully addressed in scientific literatures. The objective of this review was to investigate effects of probiotics for the management of human health. Other objectives included study on effects of free and encapsulated forms of... 

    Extraction and purification of phosphatidylcholine and its potential in nanoliposomal delivery of eucalyptus citriodora oil

    , Article Canadian Journal of Chemical Engineering ; 2021 ; 00084034 (ISSN) Bahari, M ; Vaziri, A. S ; Alemzadeh, I ; Sharif University of Technology
    John Wiley and Sons Inc  2021
    Abstract
    Phosphatidylcholine (PC) possesses amphiphilic characteristics to form vesicles or liposome nanoparticles and can be utilized to deliver essential nutrients such as proteins, peptide antigens, and essential fatty acids. In this study, an attempt has been made to obtain purified PC and evaluate its potential in nanoliposome synthesis and its corresponding drug release profile. In this regard, four physical separation techniques comprising extraction, precipitation, static, and dynamic adsorption were assessed and applied to purify PC from soybean lecithin. Different solvents and the ratio of lecithin to solvent were used to achieve the highest PC percentage. The results of an HPLC test showed... 

    Clinical uses and survival study of free and encapsulated probiotic bacteria in fruit juices: A review

    , Article Applied Food Biotechnology ; Volume 8, Issue 3 , 2021 , Pages 161-179 ; 23455357 (ISSN) Alemzadeh, I ; Afarin, M ; Dehghan, A ; Sani, M. A ; Teimouri, M ; Seilani, F ; Abbasi, P ; Vaziri, A. S ; Sharif University of Technology
    National Nutrition and Food Technology Research Institute  2021
    Abstract
    Background and Objective: Probiotics are dietary supplements with potential health benefits for humans when consumed regularly at appropriate quantities. The latest evidence shows possible beneficial effects of probiotics in COVID-19 treatment. Interests in probiotic consumption have led to provide products such as probiotic juices with vitamins, minerals, prebiotics and appropriate levels of probiotics to the market in free and encapsulated forms, which are not fully addressed in scientific literatures. The objective of this review was to investigate effects of probiotics for the management of human health. Other objectives included study on effects of free and encapsulated forms of... 

    Encapsulation of food components and bioactive ingredients and targeted release

    , Article International Journal of Engineering, Transactions A: Basics ; Volume 33, Issue 1 , 2020 , Pages 1-11 Alemzadeh, I ; Hajiabbas, M ; Pakzad, H ; Sajadi Dehkordi, S ; Vossoughi, A ; Sharif University of Technology
    Materials and Energy Research Center  2020
    Abstract
    The potential utilization of encapsulation techniques in food, pharmaceutical and agricultural products preparation, presents a new alternative for complementary technologies such as targeting delivery vehicles and carriers for active food ingredients. Encapsulation could be accomplished by different techniques like: simple or complex coacervation, emulsification technique, phase separation, spray drying, spray chilling or spray cooling, extrusion coating, freeze drying, fluidized-bed coating, liposomal entrapment, centrifugal suspension separation, co-crystallization and molecular inclusion complexation. Encapsulation is a method by which one bioactive material or mixture of materials is... 

    Examination of chondroitinase ABC I immobilization onto dextran-coated Fe3O4 nanoparticles and its in-vitro release

    , Article Journal of Biotechnology ; Volume 309 , 2020 , Pages 131-141 Askaripour, H ; Vossoughi, M ; Khajeh, K ; Alemzadeh, I ; Sharif University of Technology
    Elsevier B.V  2020
    Abstract
    Chondroitinase ABC I (cABC I) has received notable attention in treatment of spinal cord injuries and its application as therapeutics has been limited due to low thermal stability at physiological temperature. In this study, cABC I enzyme was immobilized on the dextran-coated Fe3O4 nanoparticles through physical adsorption to improve the thermal stability. The nanoparticles were characterized using XRD, SEM, VSM, and FTIR analyses. Response surface methodology and central composite design were employed to assess factors affecting the activity of immobilized cABC I. Experimental results showed that pH 6.3, temperature 24 °C, enzyme/support mass ratio 1.27, and incubation time 5.7 h were the... 

    Ag-doped magnetic metal organic framework as a novel nanostructured material for highly efficient antibacterial activity

    , Article Environmental Research ; Volume 188 , 2020 Rahmati, Z ; Abdi, J ; Vossoughi, M ; Alemzadeh, I ; Sharif University of Technology
    Academic Press Inc  2020
    Abstract
    In the last decades, numerous attempts have been made to prevent microbial pollution spreading, using antibacterial agents. Zeolitic imidazolate framework-8 (ZIF-8) belongs to a subgroup of metal organic frameworks (MOFs) merits of attention due to the zinc ion clusters and its effective antibacterial activity. In this work, Ag-doped magnetic microporous γ-Fe2O3@SiO2@ZIF-8-Ag (FSZ-Ag) was successfully synthesized by a facile methodology in room temperature and used as an antibacterial agent against the growth of the Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacteria. Several characterization methods were applied to analyze the properties of the materials, and the... 

    Enzymatic and soil burial degradation of corn starch/glycerol/sodium montmorillonite nanocomposites

    , Article Polymers from Renewable Resources ; Volume 11, Issue 1-2 , 2020 , Pages 15-29 Ostadi, H ; Gilak Hakimabadi, S ; Nabavi, F ; Vossoughi, M ; Alemzadeh, I ; Sharif University of Technology
    SAGE Publications Ltd  2020
    Abstract
    In this study, effects of glycerol (10, 20, and 30 wt%) and Sodium Montmorillonite (Na-MMT) (0%, 2.5%, and 5%) contents on the degradation of corn starch polymers were investigated. Films were prepared by casting corn starch solution using a modified method to enhance the nanoclay distribution. Biodegradability studies were performed by enzymatic and burial tests using pristine and enriched soils. The biodegradability of samples in pristine soil was faster, and all samples were fully degraded in 6 months. The effect of nanoparticles on the mass reduction in degradation was more pronounced than that of glycerol. In all glycerol concentrations, Na-MMT addition increased tensile strength. FTIR... 

    Design and fabrication of a novel microfluidic system for enrichment of circulating tumor cells with the assistance of computer simulations

    , Article Avicenna Journal of Medical Biotechnology ; Volume 11, Issue 4 , 2019 , Pages 277-284 ; 20082835 (ISSN) Dorrigiv, D ; Vossoughi, M ; Alemzadeh, I ; Sharif University of Technology
    Avicenna Research Institute  2019
    Abstract
    Background: Cancer is the first cause of death in developed countries. The heterogeneous nature of cancer requires patient-specified treatment plans. One reliable approach is collecting Circulating Tumour Cells (CTCs) and using them for prognosis and drug response assessment purposes. CTCs are rare and their separation from normal cell requires high-accuracy methods. Methods: A microfluidic cell capture device to separate CTCs from peripheral blood is presented in this study. The CTC separation device applies hydrodynamic forces to categorize cells according to their sizes. The proposed device is designed and evaluated by numerical simulations and validated experimentally. The simulation... 

    Magnetite nanoparticle as a support for stabilization of chondroitinase ABCI

    , Article Artificial Cells, Nanomedicine and Biotechnology ; Volume 47, Issue 1 , 2019 , Pages 2721-2728 ; 21691401 (ISSN) Askaripour, H ; Vossoughi, M ; Khajeh, K ; Alemzadeh, I ; Sharif University of Technology
    Taylor and Francis Ltd  2019
    Abstract
    Chondroitinase ABCI (cABCI) is a drug enzyme that can be used to treat spinal cord injuries. Due to low thermal stability of cABCI, this enzyme was immobilized on Fe3O4 nanoparticle to increase its thermal stability. The size and morphology, structure and magnetic property of the Fe3O4 nanoparticles were characterized by the analyses of SEM, XRD and VSM, respectively, and FTIR spectroscopy was employed to confirm the immobilization of cABCI on the surface of Fe3O4 nanoparticles. The results indicated that the optimum conditions for pH, temperature, cABCI-to-Fe3O4 mass ratio and incubation time in immobilization process were 6.5, 15 °C, 0.75 and 4.5 h, respectively, and about 0.037 mg cABCI... 

    Synthesis of porous TiO2/ZrO2 photocatalyst derived from zirconium metal organic framework for degradation of organic pollutants under visible light irradiation

    , Article Journal of Environmental Chemical Engineering ; Volume 7, Issue 3 , 2019 ; 22133437 (ISSN) Abdi, J ; Yahyanezhad, M ; Sakhaie, S ; Vossoughi, M ; Alemzadeh, I ; Sharif University of Technology
    Elsevier Ltd  2019
    Abstract
    Zirconium based metal-organic frameworks (Zr-MOFs) are promising candidates for photocatalytic wastewater treatment due to their excellent properties such as high chemical and thermal stability and high photodegradation ability. Herein, we report a novel porous TiO2/ZrO2 photocatalyst derived from UiO-66 and Titania hybrids. UiO-66 nanoparticles was synthesized through solvothermal method and utilized as catalyst support to grow TiO2 particles on its surface. The prepared Titania/MOF nanocomposite was calcined to obtain porous TiO2/ZrO2 photocatalyst for degradation of organic pollutants from colored wastewater under LED visible light. The prepared materials were fully characterized with... 

    Adaptive fuzzy nonlinear sliding-mode controller for a car-like robot

    , Article 5th IEEE Conference on Knowledge Based Engineering and Innovation, KBEI 2019, 28 February 2019 through 1 March 2019 ; 2019 , Pages 686-691 ; 9781728108728 (ISBN) Shirzadeh, M ; Shojaeefard, M. H ; Amirkhani, A ; Behroozi, H ; Intelligent Systems Scientific Society of Japan; Iran Computer and Video Games Foundation; Islamic World Science Citation Center (ISC) ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2019
    Abstract
    In this paper, a nonlinear controller, which can be updated online by means of fuzzy logic, has been proposed for tracking the trajectory of a car-like robot. The advantage of this control scheme is that it eliminates the effects of model disturbances and uncertainties, which cannot be avoided; and especially when we consider the difficult task of determining the exact kinematic and dynamic models of car-like robots. The proposed approach comprises a robust nonlinear section that uses the sliding mode control and a fuzzy section that can update, online, parameters of the nonlinear controller. The stability and the error convergence of the closed-loop system are verified through the Lyapunov... 

    Synthesis of magnetic metal-organic framework nanocomposite (ZIF-8@SiO2@MnFe2O4) as a novel adsorbent for selective dye removal from multicomponent systems

    , Article Microporous and Mesoporous Materials ; Volume 273 , 2019 , Pages 177-188 ; 13871811 (ISSN) Abdi, J ; Mahmoodi, N. M ; Vossoughi, M ; Alemzadeh, I ; Sharif University of Technology
    Elsevier B.V  2019
    Abstract
    Herein, magnetic metal-organic framework nanocomposite (ZIF-8@SiO2@MnFe2O4) was synthesized. The ultrasound-assisted simultaneous adsorption of Malachite Green (MG) and Methyl Orange (MO) as cationic and anionic dyes onto ZIF-8@SiO2@MnFe2O4 magnetic microporous nanocomposite (MMNC) as a novel adsorbent was investigated. The FTIR, FESEM, TEM, XRD, BET and VSM were used to characterize the prepared adsorbent. The analysis of dyes concentration in a binary mixture was investigated using zero-order and first order derivative spectrophotometry. The individual effects and possible interactions between the various parameters were investigated by response surface methodology (RSM). The optimized... 

    A biomimetic heparinized composite silk-based vascular scaffold with sustained antithrombogenicity

    , Article Scientific Reports ; Volume 7, Issue 1 , 2017 ; 20452322 (ISSN) Zamani, M ; Khafaji, M ; Naji, M ; Vossoughi, M ; Alemzadeh, I ; Haghighipour, N ; Sharif University of Technology
    2017
    Abstract
    Autologous grafts, as the gold standard for vascular bypass procedures, associated with several problems that limit their usability, so tissue engineered vessels have been the subject of an increasing number of works. Nevertheless, gathering all of the desired characteristics of vascular scaffolds in the same construct has been a big challenge for scientists. Herein, a composite silk-based vascular scaffold (CSVS) was proposed to consider all the mechanical, structural and biological requirements of a small-diameter vascular scaffold. The scaffold's lumen composed of braided silk fiber-reinforced silk fibroin (SF) sponge covalently heparinized (H-CSVS) using Hydroxy-Iron Complexes (HICs) as... 

    Synthesis of metal-organic framework hybrid nanocomposites based on GO and CNT with high adsorption capacity for dye removal

    , Article Chemical Engineering Journal ; Volume 326 , 2017 , Pages 1145-1158 ; 13858947 (ISSN) Abdi, J ; Vossoughi, M ; Mahmoodi, N. M ; Alemzadeh, I ; Sharif University of Technology
    2017
    Abstract
    In this study, zeolitic imidazolate framework (ZIF-8) as a metal-organic framework (MOF) and its hybrid nanocomposites based on graphene oxide (GO) and carbon nanotubes (CNTs) were synthesized by facile method at an ambient temperature. The sufficiency of GO and CNT substrates as the main components of the composites to grow nanoscale MOFs and increase dispersive forces were investigated. The characteristics of the MOF and hybrid nanocomposites were studied using FTIR, SEM, XRD, BET and TGA techniques. The prepared nanomaterials applied as adsorbents to remove malachite green (MG) as a cationic dye from colored wastewater. The removal rates of the hybrid nanocomposites were greater than that...