Hossein Abbastabar Ahangar

Islamic Azad University, Najafabad Branch | IAUN · Department of Chemistry

Background & Aim: Mung bean knwn as a traditional food which has been used both as nutritional food and herbal medicine over 2000 years. Mung bean sprouts are one of the most commonly used bean sprouts and considered an as appropriate source for the extraction of highly valuable proteins. Experimental: In this study, the effect of different solid t...

This study aimed to investigate the effects of electrohydrodynamic (EHD) pretreatment on the functional properties of sprouted mung bean protein isolate (SMPI). Here, the effects of EHD voltage and time on the extraction yield (EY), protein solubility (PS), water‐holding capacity (WHC), oil absorption capacity (OAC), foaming capacity, and foaming s...

In this paper, we aimed to investigate the linear and nonlinear optical properties of GO-ZnO and RGO-ZnO nanocomposites in comparison with pure GO and reduced graphene oxide (RGO). For this purpose, GO, RGO, GO-ZnO, and RGO-ZnO were synthesized and characterized by Fourier transform infrared (FT-IR), Ultraviolet–Visible (UV–Vis) absorption, X-ray d...

In this research, the extraction of protein from sprouted mung bean was conducted by the combination of ultrasound pretreatment, alkaline extraction and acid precipitation processes and the effects of sonication power (0, 50, 100, 150, 200, 250 and 300 W) and sonication time (10, 20, 30 and 40 min) on the structural and functional properties of the...

Recent studies have shown the potential of hydroxychloroquine (HCQ) as a pharmaceutical agent to the treatment of a variety of cancers such as lung, melanoma, breast, pancreatic, and colon cancers. HCQ has been proposed to cure viral diseases such as Covid-19 disease. In this study, Fe 3 O 4 @PVA/GT nanocomposite has been synthesized for controllin...

Effect of adding foxtail millet flour (FMF) (10, 20, and 30% w/w) to refined wheat flour (RWF) on physicochemical and rheological properties of dough was studied. Qualitative properties of Brotchen bread including moisture, ash, crude fibre, specific volume, and colour of the breads were evaluated. Adding FMF to the flour increased crude fibre, fat...

Mucilage/ polymer hybrids are promising materials for biomedical applications and tissue engineering. Plantago psyllium mucilage/ chitosan composite scaffold was prepared by the freeze-drying method. The different ratio (v/v) of mucilage (2.5%, 5%) and chitosan (5%) was used to obtain the perfect scaffold with optimum properties. The scanning elect...

In this research, a new g-C3N4/NaBiO3 nano photocatalyst was successfully synthesized for the simultaneous degradation of cefixime and cefuroxime drugs. First, graphitic carbon nitride (g-C3N4) was prepared from melamine by a thermal method and then loaded on NaBiO3. The structure and optical properties of the prepared photocatalyst were determined...

A low-calorie biscuit formulation containing quinoa flour (cultivars TTKK), isomalt, and maltodextrin was optimized using response surface methodology. Optimized samples were evaluated in terms of total phenolic compounds (TPC), sensory properties, and nutritional value while samples containing only wheat flour (Pishgam var.) and sucrose were used...

The use of different vanadium sources in the synthesis of multi-metal MoVTeNb oxide catalysts has been investigated for their effect on the physicochemical properties of catalysts. Metal oxides were synthesized by slurry method assisted with a microwave irradiation. Vanadium pentoxide (V2O5), vanadyl sulphate (VOSO4) and ammonium metavanadate (NH4V...

Periodontal tissue engineering has made a tremendous change in the treatment of periodontal disease. In this study, electrophoresed poly‐hydroxy‐butyrate (PHB) scaffold, beta‐three calcium phosphate (β‐TCP) nano powder in 3, 5 and 7% wt, ciprofloxacin antibiotics, and vitamin D3 as the major materials along with electrospinning method are selected...

In this research, ZnAl2O4/Al2O3 nanocomposites with different ZnAl2O4 (30, 50, and 70 wt.%) were successfully prepared in one step by sol–gel method and utilized for the removal of methylene blue (MB). The structural properties of nanocomposites were investigated by X-ray diffraction (XRD), differential thermal analysis (DTA), FTIR analysis, Zeta p...

Polymer concrete contains aggregates and a polymeric binder such as epoxy, polyester, vinyl ester, or normal epoxy mixture. Since polymer binders in polymer concrete are made of organic materials, they have a very low heat and fire resistance compared to minerals. This paper investigates the effect of basalt fibers (BF) and alginate on the compress...

CuAl2O4–Al2O3–SiO2 nanocomposites with different amounts of CuAl2O4 (40, 50, 60 and 70 wt. %) were synthesized by the sol–gel method and characterized by XRD, FTIR, FESEM, EDS and TEM analyses. The nanocomposites were applied for removal of methylene blue (MB) as a cationic dye from aqueous solution. The relation between removal percentages with va...

The sustainability of reinforced concrete structures is of high importance for practitioners and researchers, particularly in harsh environments and under extreme operating conditions. Buildings and tunnels are of the places that most of the fire cases take place. The use of fiber in concrete composite acts as crack arrestors to resist the developm...

Oil spill containments are daily life problems due to inherent risks in transporting oil and diluted bitumen products via both tankers and pipelines. For oil–water separation, using a solidifier is one of the most efficient methods which triggers chemical interactions between the solidifier and the spilled oil to change the liquid phase of oil to a...

Polysaccharides as natural hydrogels provide a promising strategy to prepare stimuli responsive drug carriers in pharmaceutical industries. In this work, Fe3O4 magnetic nanoparticles (MNPs) functionalized with (3-amino propyl) triethoxy silane (APTES) and coated by Chitosan (CS) and Tragacanth Gum (TG) to encapsulate curcumin. The synthesized nanoc...

Spinel ferrite-based nanoparticles are being widely applied in bone tissue regeneration because of their outstanding properties such as their capability to be applied in hyperthermia-based bone cancer therapy. In the present study, Cu0.3Zn0.2Mg0.5Fe2O4 nanoparticles are synthesized through thermal-treatment method followed by calcination at 650 °C....

Ni- and Fe-doped CeO2 nanoparticles were prepared by a chemical co-precipitation method and then heat treated at 300 °C. The structural, morphological, and compositional properties of the prepared nanoparticles were studied by powder X-ray diffraction (XRD), Energy Dispersive Spectroscopy (EDS), Scanning Electron Microscopy (SEM) and Fourier-Transf...

CuxZn0.5-xMg0.5Fe2O4 (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) ferrite nanoparticles are synthesized via thermal treatment technique using polyvinyl alcohol (PVA) as a capping agent. The effect of Cu²⁺ ions substitution on the magnetic and structural properties of ZnMg ferrite nanoparticles is assessed. X-ray diffraction (XRD) results prove the formation of...

A BaCO3/BaSnO3/SnO2 nanocomposite has been prepared using a co-precipitation method without adding any additives. The prepared sample was characterized by using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), Fourier-transform infrared (FT-IR) spectroscopy, energy dispersive X-r...

NiO dendrites and tree-like nanostructures were successfully synthesized by hydrothermal reaction of Ni(NO3)2, ethylenediamine, and thiourea. It was found that achievement of such structures depended on the duration time of the hydrothermal method, the temperature, and the capping agents used. The obtained powder was characterized by X-ray diffract...

ZnO/ZnFe2O4 nanocomposite was prepared by a simple and low cost chemical precipitation method. The prepared composite was characterized by X-ray diffraction (XRD), energy-dispersive X-ray (EDX), Raman and Fourier Transform infrared spectroscopy (FTIR). The morphology of the prepared sample was studied by scanning electron microscopy (SEM). Photolum...

Mixed spinel ferrite nanoparticles are being applied in biomedical applications due to their biocompatibility, antibacterial activity, particular magnetic and electronic properties with chemical and thermal stabilities. The Cu0.3Zn0.5Mg0.2Fe2O4 nanoparticles are synthesized through the thermal treatment method. Polyvinyl alcohol (PVA) is used as th...

In this paper a template-free precipitation method was used as an easy and low cost way to synthesize Ag2S semiconductor nanoparticles. The Kramers-Kronig method (K-K) and classical dispersion theory was applied to calculate the optical constants of the prepared samples, such as the reflective index n(ω) and dielectric constant ε(ω) in Far-infrared...

There is an error in affiliation 3 for author Hossein Abbastabar Ahangar. The correct affiliation should be: Department of Chemistry, Faculty of Science, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, Iran.

A template-free precipitation method was used as a simple and low cost method for preparation of CeO2 nanoparticles. The structure and morphology of the prepared nanoparticle samples were studied in detail using X-ray diffraction, Raman spectroscopy and Scanning Electron Microscopy (SEM) measurements. The whole powder pattern modelling (WPPM) metho...

Manganese (Mn)-doped titanium dioxide (TiO2) nanostructures were synthesised by hydrothermal reaction of TiO2 and Mn acetate with ethylenediamine and thiourea. The prepared samples were characterised by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, field emission scanning electron microscopy and energ...

Undoped and rare earth doped Er, Er/Yb and Er/Yb/La ZnO nanoplates were synthesized in order to study the effect of La co-doping on near infrared (NIR) emission properties of the Er ions hosted in the semiconductor. Samples were characterized by X-ray diffraction, scanning electron microscope, energy-dispersive X-ray spectroscopy. Emission spectra...

ZnO/ZnS/Ag2S ternary nanostructure was prepared by a simple and low-cost chemical precipitation method. The sample was characterised by X-ray diffraction, energy-dispersive X-ray, UV-Vis-NIR, and Raman and Fourier transform infrared spectroscopy. Morphology of the sample was studied by scanning electron microscopy and it was observed that ZnO nanop...

ZnO nanoplates/ZnS nanoparticles as a hetero-nanocomposite structure was prepared by a single pot precipitation method without using any capping ligands or other additives. The morphology of the prepared nanocomposite was studied by scanning electron microscopy (SEM). Optical properties of the prepared samples were studied by UV-visible reflectance...

A laser ablation technique is applied for synthesis of silver nanoparticles in different concentrations of polyvinyl alcohol (PVA) aqueous solution. The ablation of high pure silver plate in the solution is carried out by a nanosecond Q-switched Nd:YAG pulsed laser. X-ray diffraction and transmission electron microscopy are implemented to explore t...

Goethite (alpha-FeOOH) nanorods were synthesized via the hydrothermal method with the assistance of coordinating ligands, i.e. ethylenediamine and thiourea. The homogeneity of the nanorod size distribution increased and the propensity to agglomerate decreased when ethylenediamine and thiourea were used in conjunction; contrary to goethite synthesis...

Rare-earth (Er, La and Yb) doped ZnO nanostructures have been synthesized by precipitation. The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). Their optical properties were studied by Raman spectroscopy at room temperature and UV-Visible diffuse ref...

Laser ablation synthesis in solution is an emerging new technology for the production of stabile nanoparticles. It is a reliable and “green” alternative to more conventional physical and especially chemical reduction methods, since it does not rely on the use of potentially toxic chemicals. This is particularly important when producing nanoparticle...

Silver nanoparticles were prepared in monoolein, a glycerol derivative of oleic acid, via pulsed laser ablation of a silver plate with a Q-Switched Nd:YAG laser (1064 nm). The average size of the nanoparticles was 8.8±0.5 nm, with a narrow size distribution of 4.6 nm FWHM. No significant agglomeration or flocculation was observed after one-month st...

In this paper, we report fabrication and characterization of ZnO/Ag and ZnO/Au core/shell nanocomposites by 2-hour laser irradiation of the two solutions first containing mixture of ZnO and Ag nanoparticles and second containing ZnO and Au nanoparticles. The process of fabrication was carried out by Nd:YAG second harmonic pulsed laser and the prepa...

Tetragonal copper ferrite nanoparticles were fabricated by a thermal-treatment method by using a solution that contained poly(vinyl alcohol) (PVA) as a capping agent and Cu and Fe nitrates as alternative sources of metal. Heat treatment was conducted at temperatures between 673 and 823 K, and final products had different crystallite sizes ranging f...

Laser ablation-based nanoparticle synthesis in solution is rapidly becoming popular, particularly for potential biomedical and life science applications. This method promises one pot synthesis and concomitant bio-functionalization, is devoid of toxic chemicals, does not require complicated apparatus, can be combined with natural stabilizers, is dir...

MoVTeNb mixed oxide catalysts were successfully prepared by reflux with different drying methods. X-ray diffraction (XRD) confirmed the presence of orthorhombic (M1), hexagonal (M2) and (Mo0.93V0.07) 5O14 phases after spray drying the slurry, while the catalysts obtained from the precipitate and mother liquid contained only hexagonal M2 and (Mo0.93...

In this paper we have done a comparative study on efficiency of natural polymers for stabilizing silver nanoparticles (Ag-NPs) prepared by laser ablation technique. The selected polymers are starch (St), gelatin (Gt) and chitosan (Ct). The fabrication process was carried out through ablation of a pure Ag plate by nanosecond Q-switched Nd–Yg pulsed...

The pulsed laser thermal lens technique was used to study the thermal diffusivity of fluids containing copper nanoparticles (Cu-NPs)prepared by g-irradiation method. The samples were prepared for the different concentrations of Cu precursor at 20.KGy dose. A Q-switched Nd-YAG pulsed laser of wavelength 532.nm was used as an excitation source and He...

Ni-, Co-, and Ft- promoted MoVNbOx mixed metal oxide catalysts were prepared by impregnation method. The physicochemical properties of the catalysts showed that the BET surface area of the promoted catalysts was lower when compared to the unpromoted catalysts due to the filling of open pores by the promoters. X-ray diffraction (XRD) analysis indica...

Zinc oxide is a semiconductor with exceptional thermal, luminescent and electrical properties, even compared with other semiconducting nanoparticles. Its potential for advanced applications in lasers and light emitting diodes, as bio-imaging agent, in biosensors and as drug delivery vehicles, in ointments, coatings and pigments has pulled zinc oxid...

We report fabrication of silver nanoparticles (Ag NPs) by laser ablation technique in different concentrations of aqueous chitosan solution. The ablation process of silver plate was carried out by using a nanosecond Q-switched Nd:YAG pulsed laser and the characterization of Ag NPs was done by Transmission electron microscopy, UV-Vis spectroscopy, a...

A conductance study of the interaction between titanium (III) cation and tris(2-pyridyl) methylamine (tpm), in water-acetonitrile mixtures was carried out at various temperatures. The formation constants of the resulting 1:1 complexes were determined from the molar conductance-mole ratio data. The stability constants of 1:1 (M:L) complexes of tpm w...

Nickel ferrite nanocrystals were prepared from an aqueous solution containing metal nitrates and poly (vinyl pyrrolidone) (PVP) as a capping agent. To stabilize the particles, they were thermally treated at various temperatures from 623 to 823K at which calcination occurred, thereby stabilizing the particles, controlling the growth of the nanoparti...

This work reports the applicability of reflux to the synthesis of Mo–V–Te–Nb–O metal oxide catalysts for the first time. The well-formed and defined orthorhombic M1 phase, i.e. Te 2 M 20 O 57 (M = Mo, V, Nb), was found to be better developed when a longer time was used to reflux the mixed metal clusters. The catalysts efficient for propane selectiv...

Silver nanoparticles were fabricated by ablation of a pure silver plate immersed in castor oil. A Nd:YAG-pulsed Q-switch laser with 1064-nm wavelength and 10-Hz frequency was used to ablate the plate for 10 minutes. The sample was characterized by ultraviolet-visible, atomic absorption, Fourier transform-infrared spectroscopies, and transmission el...

Immobilized Candida antarctica lipase B-catalyzed esterification of xylitol and two fatty acids (capric and caproic acid) were studied in a solvent-free system. The Taguchi orthogonal array method based on three-level-four-variables with nine experiments was applied for the analysis and optimization of the reaction parameters including time, substr...

Laser ablation of a silver plate immersed in virgin coconut oil was carried out for fabrication of silver nanoparticles. A Nd:YAG laser at wavelengths of 1064 nm was used for ablation of the plate at different times. The virgin coconut oil allowed formation of nanoparticles with well-dispersed, uniform particle diameters that were stable for a reas...

In this study we used a laser ablation technique for preparation of silver nanoparticles. The fabrication process was carried out by ablation of a silver plate immersed in palm oil. A pulsed Nd:YAG laser at a wavelength of 1064 nm was used for ablation of the plate at different times. The palm coconut oil allowed formation of nanoparticles with ver...

1,2-Dihydro-1-arylnaphtho[1,2-e][1,3]oxazine-3-one derivatives were synthesized in high yields using a facile and one-pot condensation of 2-naphthol, aromatic aldehydes and urea catalyzed by perchloric acid supported on silica under thermal solvent-free conditions.

The NiCoFerrite nanoparticle has been prepared using thermal method. Polyvinyl pyrrolidon (PVP) was used as a reducing agent due to its reducing effect on agglomeration of particles. The characterization studies such as X-ray diffraction (XRD) and transmission electron microscopy (TEM) have been done for explore the particles size. By Scherer's equ...

Crystalline, magnetic, cobalt ferrite nanoparticles were synthesized from an aqueous solution containing metal nitrates and polyvinyl pyrrolidone (PVP) as a capping agent by a thermal treatment followed by calcination at various temperatures from 673 to 923 K. The structural characteristics of the calcined samples were determined by X-ray diffracti...

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Under microwave irradiation, the corresponding hydroxycyclopentenones were prepared in high yields by the cross-aldol reactions of benzil with various ketones. When the reactions were performed in various solvents under classical heating for a long time, they produced the products in relatively low yields.

A new chemically modified carbon paste electrode for Cd(II) ions based on 3,5-dinitro-N-(tri-2-pyridyl methyl) benzamide (DNTPMBA) as an ionophore was prepared. The electrode exhibits a Nernstian response for Cd(II) ions over a wide concentration range (2.16 × 10−7–1.00 × 10−1 mol L−1) with a slope of 30 ± 1 mV per decade. It has a response time of...

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Reduction of varieties of carbonyl compounds such as ketones and α,β-unsaturated cyclic ketones were carried out quickly and efficiently by NaBH4/MgSO4-7H2O under microwave irradiation. The corresponding products were obtained in high to excellent yields.

The title compound, C23H16N6O5, was synthesized by reaction of tri-2-pyridylmethylamine and 3,5-dinitrobenzoyl chloride. There is an intramolecular N—H...N hydrogen bond [N...N = 2.5740 (12) Å] between the amide group and one of the three pyridine rings. The crystal packing is stabilized by weak intermolecular C—H...O hydrogen bonds.