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Thermal decomposition kinetic study of Fe5C2 nanoparticles

F Najarnia, F Ahmadpoor, S Sahebian, JA Johnson, S Kamali, ...
Journal Paper , , {Pages }

Abstract

Highly efficient porous magnetic polydopamine/copper phosphate with three-dimensional hierarchical nanoflower morphology as a selective platform for recombinant proteins separation

M Mohammad, F Ahmadpoor, SA Shojaosadati, E Vasheghani-Farahani
Journal Paper , , {Pages }

Abstract

Repetitive non-destructive extraction of lipids from Chlorella vulgaris grown under stress conditions

Shabnam Mirizadeh, Alessandro Alberto Casazza, Attilio Converti, Mohsen Nosrati, Seyed Abbas Shojaosadati
Journal PaperBioresource Technology , Volume 326 , 2021 April 1, {Pages 124798 }

Abstract

The aim of this study was the investigation of non-destructive lipid extraction from Chlorella vulgaris grown under stress conditions of nutrient limitation and salinity. To select a suitable solvent for extraction, the performances of decane, dodecane and hexadecane were tested based on their effect on lipid extraction and cell viability. The results showed that dodecane was the most suitable solvent for the extraction process. The concentration of extracted lipids from stressed cells was 2762.52???11.38?mg L−1, i.e. a value 1.75 times higher than that obtained from unstressed cells. Long-term extraction was also evaluated with continuous dodecane recirculation during five-stage extraction and a recovery time of 24?h between the extracti

Pectin/lignocellulose nanofibers/chitin nanofibers bionanocomposite as an efficient biosorbent of cholesterol and bile salts

Alireza Chackoshian Khorasani, Fatemeh Kouhfar, Seyed Abbas Shojaosadati
Journal PaperCarbohydrate Polymers , 2021 March 3, {Pages 117883 }

Abstract

A new biosorbent Ca-crosslinked pectin/lignocellulose nanofibers/chitin nanofibers (PLCN) was synthesized for cholesterol and bile salts adsorption from simulated intestinal fluid during gastric-intestinal passage. The physico-chemical properties of PLCN were studied using SEM, FTIR, XRD, DSC and BET. Before gastrointestinal passage, PLCN had an amorphous single-phase, compact structure formed via hydrogen and van der Waals bonds that revealed an irregular shape with the shriveled surface but watery condition and enzymatic digestion led to create a porous structure without destruction because of the water-insoluble nanofibers, therefore increasing the adsorption capacity. The maximum adsorption capacity reached 37.9 and 5578.4 mg/g for ch

The Effect of Surface Coating of Iron Oxide Nanoparticles on Magnetic Resonance Imaging Relaxivity

Fatemeh Ahmadpoor, Atif Masoud, Neus Feliu, Wolfgang Parak, Seyed Abbas Shojaosadati
Journal PaperFrontiers in Nanotechnology , Volume 3 , 2021 January , {Pages 13 }

Abstract

Iron oxide nanoparticles (IONPs) with acceptable biocompatibility and size dependent magnetic properties can be used as efficient contrast agents in magnetic resonance imaging (MRI). Herein, we have investigated the impact of particle size and surface coating on the proton relaxivity of IONPs, as well as engineering of small IONPs' surface coating as a strategy for achieving gadolinium free contrast agents. Accordingly, polymer coating using poly(isobutylene-alt-maleic anhydride) (PMA) with overcoating of the original ligands was applied for providing colloidal stability to originally oleic acid capped IONPs in aqueous solution. In case of replacement of the original ligand shell the polymer had been modified with dopamine. Furthermore, the

In situ production and deposition of nanosized zinc oxide on cotton fabric

Tahereh Mahmoudi Alashti, Negar Motakef Kazemi, Seyed Abbas Shojaosadati
Journal PaperIran. J. Chem. Chem. Eng. Research Article Vol , Volume 40 , Issue 1, 2021 January , {Pages }

Abstract

In this research, the cotton fabric was modified with nanosized zinc oxide (ZnO) by a simple and novel approach. The nanosized zinc oxide was prepared and deposited onto cotton fabrics by in situ method using zinc acetate dihydrate (Zn (OAc) 2. H2O) as precursors and sodium hydroxide, with and without starch as a capping agent. The size and morphology of nanosized zinc oxide on cotton fabric in the presence and absence of starch were investigated. The samples were characterized by X-Ray Diffraction (XRD), Fourier Transform InfraRed (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray spectroscopy (EDS), Atomic Absorption Spectroscopy (AAS), and contact angle. The antibacterial activity of modified cotton was eva

A novel self-assembled micelles based on stearic acid modified schizophyllan for efficient delivery of paclitaxel

Zahra Negahban, Seyed Abbas Shojaosadati, Sepideh Hamedi
Journal PaperColloids and Surfaces B: Biointerfaces , Volume 199 , 2021 March 1, {Pages 111524 }

Abstract

This study was aimed to design a novel amphiphilic carrier based on schizophyllan (SPG) exopolysacharide for drug delivery. Stearic acid (SA) was used for the esterification of SPG with two degrees of substitutions (SA-SPG0.5 and SA-SPG1). The H NMR and FTIR spectroscopies verified the succesfull esterification of SPG. The polymeric micelles easily self-assembled into nanomicelles by ultrasound method. Fluorescence spectroscopy showed that the critical micelle concentrations (CMCs) of SA-SPG0.5 and SA-SPG1 micelles were 0.068 mg/mL and 0.027 mg/mL, respectively. DLS analyses showed that nanomicelles were ranged from 156 to 175 nm. SEM and TEM images showed that nanomicelles were mostly spherical. Paclitaxel (PTX) as a drug model was s

Synthesis and characterization of Schiff base containing bovine serum albumin-gum arabic aldehyde hybrid nanogels via inverse miniemulsion for delivery of anticancer drug

Ghazal Bashiri, Seyed Abbas Shojaosadati, Mahdi Abdollahi
Journal PaperInternational Journal of Biological Macromolecules , Volume 170 , 2021 February 15, {Pages 222-231 }

Abstract

The periodate modified gum arabic was used as a natural-based, non-toxic cross-linker to synthesize hybrid bovine serum albumin-gum arabic aldehyde (BSA-GAA) nanogels by Schiff base reaction through the inverse miniemulsion method for the first time. The synthesis process was performed in the absence of toxic organic solvents using fractionated coconut oil as the continuous phase. The particle size of the nanogels was managed by tweaking the concentration of the surfactants (Span 80/Tween 80) and the total volume of the aqueous phase. Based on the bicinchoninic acid method, the cross-linking efficiency of BSA and GAA was estimated at 98%. 5-fluorouracil (5-FU) was selected as the sample drug. The 5-FU-loaded hybrid nanogels showed a spheric

Removal of toluene in a biotrickling filter in the presence of methanol vapors: Experimental study, mathematical modeling, and kinetic parameters optimization

Mohammad Kalantar, Seyed Morteza Zamir, Milad Ferdowsi, Seyed Abbas Shojaosadati
Journal PaperJournal of Environmental Chemical Engineering , Volume 9 , Issue 1, 2021 February 1, {Pages 104617 }

Abstract

The performance of biotrickling filters (BTFs) has been significantly affected during the co-treatment of volatile organic compounds (VOCs) with different hydrophilicities. Removal of toluene vapor as a hydrophobic compound in the absence and presence of methanol as a hydrophilic pollutant was studied in a BTF. The inlet loading ranges were 18−36 g.m−3.h−1 for toluene and 0−225 g.m−3.h−1 for methanol at constant empty bed residence time (EBRT) of 60 s. The removal efficiency of toluene (RET) varied from 30 to 80 %, while RE of methanol (REM) remained almost constant at > 90 % within different phases of experiments due to the unlimited solubility in water. A comprehensive dynamic mathematical model consisting of mass transfer thr

The Effect of Surface Coating of Iron Oxide Nanoparticles on Magnetic Resonance Imaging Relaxivity

Fatemeh Ahmadpoor, Atif Masoud, Neus Feliu, Wolfgang Parak, Seyed Abbas Shojaosadati
Journal PaperFrontiers in Nanotechnology , Volume 3 , 2021 January , {Pages 13 }

Abstract

Iron oxide nanoparticles (IONPs) with acceptable biocompatibility and size dependent magnetic properties can be used as efficient contrast agents in magnetic resonance imaging (MRI). Herein, we have investigated the impact of particle size and surface coating on the proton relaxivity of IONPs, as well as engineering of small IONPs' surface coating as a strategy for achieving gadolinium free contrast agents. Accordingly, polymer coating using poly(isobutylene-alt-maleic anhydride) (PMA) with overcoating of the original ligands was applied for providing colloidal stability to originally oleic acid capped IONPs in aqueous solution. In case of replacement of the original ligand shell the polymer had been modified with dopamine. Furthermore, the

Enhancement of schizophyllan production in Schizophyllum commune using microparticles in medium

Vahid Alizadeh, Seyed Abbas Shojaosadati, Seyed Morteza Zamir
Journal PaperBioprocess and Biosystems Engineering , Volume 44 , Issue 2, 2021 February , {Pages 317-328 }

Abstract

Schizophyllum commune is a wood-rotting filamentous fungus that secrets a homopolysaccharide called as schizophyllan. Schizophyllan has several applications such as enhanced oil recovery, pharmaceutical materials and an anti-cancer drug carrier. Biomass growth and schizophyllan production increase the viscosity of the cultivation medium, thus resulting in mass transfer limitation for the substrate. In this study, adding talc and aluminium oxide microparticles into the cultivation medium was studied to improve the fungal growth and morphology. The response surface methodology and one factor at a time were applied to find the effects of microparticles with different sizes and concentrations on the schizophyllan production. The optimum concent

Pectin/lignocellulose nanofibers/chitin nanofibers bionanocomposite as an efficient biosorbent of cholesterol and bile salts

Alireza Chackoshian Khorasani, Fatemeh Kouhfar, Seyed Abbas Shojaosadati
Journal PaperCarbohydrate Polymers , 2021 March 3, {Pages 117883 }

Abstract

A new biosorbent Ca-crosslinked pectin/lignocellulose nanofibers/chitin nanofibers (PLCN) was synthesized for cholesterol and bile salts adsorption from simulated intestinal fluid during gastric-intestinal passage. The physico-chemical properties of PLCN were studied using SEM, FTIR, XRD, DSC and BET. Before gastrointestinal passage, PLCN had an amorphous single-phase, compact structure formed via hydrogen and van der Waals bonds that revealed an irregular shape with the shriveled surface but watery condition and enzymatic digestion led to create a porous structure without destruction because of the water-insoluble nanofibers, therefore increasing the adsorption capacity. The maximum adsorption capacity reached 37.9 and 5578.4 mg/g for ch

Repetitive non-destructive extraction of lipids from Chlorella vulgaris grown under stress conditions

Shabnam Mirizadeh, Alessandro Alberto Casazza, Attilio Converti, Mohsen Nosrati, Seyed Abbas Shojaosadati
Journal PaperBioresource Technology , Volume 326 , 2021 April 1, {Pages 124798 }

Abstract

The aim of this study was the investigation of non-destructive lipid extraction from Chlorella vulgaris grown under stress conditions of nutrient limitation and salinity. To select a suitable solvent for extraction, the performances of decane, dodecane and hexadecane were tested based on their effect on lipid extraction and cell viability. The results showed that dodecane was the most suitable solvent for the extraction process. The concentration of extracted lipids from stressed cells was 2762.52???11.38?mg L−1, i.e. a value 1.75 times higher than that obtained from unstressed cells. Long-term extraction was also evaluated with continuous dodecane recirculation during five-stage extraction and a recovery time of 24?h between the extracti

Surface Modification of Electrospun Wound Dressing Material by Fe2O3 Nanoparticles Incorporating Lactobacillus Strains for Enhanced Antimicrobial and Antibiofilm Activity

FN Harandi, AC Khorasani, SA Shojaosadati, S Hashemi-Najafabadi
Journal Paper , , {Pages }

Abstract

Enhanced elimination of gaseous toluene and methanol emissions in a two-liquid phase trickling bioreactor: Performance evaluation, dynamic modeling, and microbial community shift

M Kalantar, SM Zamir, M Ferdowsi, SA Shojaosadati
Journal Paper , , {Pages }

Abstract

Living Lactobacillus–ZnO nanoparticles hybrids as antimicrobial and antibiofilm coatings for wound dressing application

FN Harandi, AC Khorasani, SA Shojaosadati, S Hashemi-Najafabadi
Journal Paper , , {Pages }

Abstract

Preparation of antibacterial ZnO NP-containing schizophyllan/bacterial cellulose nanocomposite for wound dressing

S Hamedi, SA Shojaosadati
Journal Paper , , {Pages }

Abstract

Synergisms of machine learning and constraint-based modeling of metabolism for analysis and optimization of fermentation parameters

MK Khaleghi, ISP Savizi, N Lewis, SA Shojaosadati
Journal Paper , , {Pages }

Abstract

The effect of 5-fluorouracil loaded albumin magnetic nanoparticles on viability and cell cycle of human breast cancer MCF-7 cell line

Z Rajabi, F Bagheri, SA Shojaosadati
Journal Paper , , {Pages }

Abstract

High cell density culture of recombinant E. coli in the miniaturized bubble columns

S Khanchezar, S Hashemi-Najafabadi, SA Shojaosadati, V Babaeipour
Journal Paper , , {Pages }

Abstract

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