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Magnetic nanoparticles

Tìm thấy 18+ kết quả cho từ khóa "Magnetic nanoparticles"

Synthesis and properties of novel magnetic nanoparticles grafted with nitropyridine-substituted calix[4]arene derivative as Cr6+ extractant

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Synthesis and properties of novel magnetic nanoparticles grafted with nitropyridine-substituted calix[4]arene derivative as Cr 6+ extractant. Then the calix[4]arene 3 was grafted onto [3-(2,3-epoxypropoxy)propyl]trimethoxysilane-modified Fe 3 O 4 – nanoparticles (EPPTMS-MN) to produce new calixarene-adorned magnetic nanoparticles (MN-DiNoPy-Calix (4. The structure of the calixarene-adorned magnetic nanoparticles 4 was determined by a combination of FTIR, TEM, and elemental analysis.

The promoted synthesis of minoxidil by magnetic nanoparticles of cobalt ferrite (CoFe2O4) as a heterogeneous reusable catalyst

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Recently, magnetic nanoparticles of ferrites have been widely used as green and efficient heterogeneous catalysts in the synthesis of organic compounds.

Magnetic solid-phase extraction based on Coriolus versicolor-immobilized γ-Fe2O3 nanoparticles for preconcentration and determination of Al(III) in water and food samples

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After biosorption of Al(III), no significant differences (except shifting on peaks and a peak at 3263 cm − 1 ) were observed for C. versicolor-immobilized γ -Fe 2 O 3 magnetic nanoparticles (Figure 3b). versicolor-immobilized γ -Fe 2 O 3 magnetic nanoparticles and the peak at 3263 cm − 1 disappeared.. versicolor -immobilized γ -Fe 2 O 3 magnetic nanoparticles and b) Al(III) on C. versicolor-immobilized γ -Fe 2 O 3 magnetic nanoparticles..

Synthesis of tetrakis(carboxyphenyl)porphyrin coated paramagnetic iron oxide nanoparticles via amino acid for photodegradation of methylene blue

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The presence of these peaks proves the LTCPP coated magnetic nanoparticles.. The FT-IR spectra of the prepared cadmium ferrite nanoparticles (a) before calcinations and (b) after calcinations at 550 ◦ C for 2 h.. The FT-IR spectra of (a) LTCPP coated CdFe 2 O 4 nanoparticles, (b) pure CdFe 2 O 4 , and (c) pure TCPP.. Figure 3 displays the XRD pattern of prepared magnetic nanoparticles calcined at 550 ◦ C for 2 h.

Home-made in vitro magnetic nanoparticle-based gene delivery system

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Home-made in vitro magnetic nanoparticle-based gene delivery system. Introduction: Biotechnology applications of Magnetic Nanoparticles (MNPs) have been rapidly investigated and are becoming the leading trend in the field. Although making an appearance al- most 20 years ago, gene delivery using magnetic nanoparticles has not achieved much significant success. This study aims to establish promising and simple MNP-based protocol for gene delivery initially.

Synthesis and characterization of magnetic amidoximated chitosan-g poly(polyacrylonitrile)/laponite RD nanocomposites with enhanced adsorption capacity for Cu2+

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Therefore, magnetic nanoparticles were firstly immobilized on laponite RD nanoclay, and graft copolymerization of acrylonitrile on chitosan was performed in the presence of magnetic laponite RD nanoparticles. 24 The magnetic chitosan-g-polyacrylonitrile/laponite RD (mChitoPAN/Lap) nanocomposites were then hydrolyzed by hydroxylamine to obtain magnetic chitosan-g-polyamidoxime/laponite RD (mChitoPAmd/Lap) nanocomposites. The amidoximated nanocomposites were used for removal of Cu 2+.

Study on potential applications and toxicity analysis of green synthesized nanoparticles

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Silver nanoparticles have been used for improving the redox potential of zeolites for better use in oxidation reactions with improved yield [96]. Recently, magnetic nanoparticles have been used in wastewater treatment due to their many advantages in the disinfection and purification of wastewater. Iron oxide nanoparticles have been used to remove Eu 3. Leaf Anacardium occidentale Au 10– 60 nm Spherical Antimicrobial and anticancer [58].

Effects of the conditions of the microemulsion preparation on the properties of Fe3O4 nanoparticles

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This space can be used as a carrier to load hydrophobic drug and with an assistance of an external magnetic field, the double layer coated NPs can be applied for magnetic drug delivery [10].. By adjusting concentration of reactant, water/surfactant ratio, reaction atmosphere in microemulsion method, we can produce magnetic nanoparticles with particle size of less than 10 nm.

A magnetic affinity approach to identify plant GABA-binding proteins

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Synthesis and characterization of GABA-coupled magnetic nanoparticles. GABA was combined with quantum dots (QDs) through the formation of amide linkages between the carboxylate group of QDs and the amino group of GABA. The characterization of the probe R , probe C , and CGP64213. Detection of the GABA binding sites on the rat brain sections, tobacco mesophyll protoplasts, and pollen protoplasts. (A2) CLSM image of the same tissue section as in A1.

One-pot synthesis of substituted 4H -chromenes by nickel ferrite nanoparticles as an efficient and magnetically reusable catalyst

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Moreover, these reactions have gained remarkable interest for chemists as an appropriate, atom- economical, and time-saving procedure for the synthesis of various compounds with interesting properties. 1 − 3 In recent years, many trends have emerged for the application of types of nanoparticles due to their potential features in various fields of modern organic synthesis and especially in MCRs. 4,5 These types of reactions in the presence of magnetic nanoparticles (MNPs) have many advantages such

Đánh giá độc tính và khả năng tăng tín hiệu tương phản ảnh MRI của vật liệu nano từ Fe3 O4 @PLA-PEG trên mô hình in vitro

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Alexiou (2006), “Drug loaded magnetic nanoparticles for cancer thera- py”, Condensed Matter., 18, pp.2893-2902.. Andreas Jordan (2008), “Clinical applica- tions of magnetic nanoparticles for hyperthermia”, International Journal of Hyperthermia, 24(6), pp.467-474.. Schaffer (2012), “Magnetic nanoparticles for safe medical im- aging”, X-Space MPI, 24, pp.3870-3877..

Synthesis and characterization of magnetic nanocomposite for in vitro evaluation of irinotecan using human cell lines

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Due to high agglomeration of the magnetic nanoparticles, it showed polydispersity as can be seen in Figures 4d and 4e. Accordingly, the particle sizes increased after the loading CPT-11 on MOCC in Figure 4e. The magnetization value of the CPT-11 loaded MOCC was measured by the change of the magnetic field versus magnetization at ambient conditions. In Figure 5a, the magnetization value of the CPT-11 loaded MOCC was determined as 56.0 emu/g.

Tai lieu tham khảo

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Zaitsev, V.S., et al., Physical and chemical properties of magnetite and magnetite-polymer nanoparticles and their colloidal dispersions. journal of Colloid and Interface Science, 1999. Gallo, Optimized formulation of magnetic chitosan microspheres containing the anticancer agent, oxantrazole. Journal of Chromatography A, 1995. Pankhurst, Q.A, et al., Applications of magnetic nanoparticles in biomedicine. Journal of physics D: Applied physics, 2003.

Summary of Doctoral Thesis Solid State of Physics: Fabrication and investigation of magnetic properties of the rare earth-free nano composites Mn-(Bi, Ga)/Fe-Co

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The optimal composition for the magnetic properties of the alloy is Mn 50 Bi 50 . Hard magnetic nanoparticles of Mn-Ga-Al possess H c ~ 12 kOe smaller than that of the Mn-Bi system but the squareness of hysteresis loops is better and they show hard magnetic single phase properties.. The exchange-spring interaction effect between the hard and soft magnetic phases and the maximum energy product (BH) max of the. Fabrication of the samples.

Magnetite nanoparticles−based hydroxyl radical scavenging activity assay of antioxidants using N, N-dimethyl-p-phenylenediamine probe

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Determination of hydrogen peroxide with the aid of peroxidase-like Fe 3 O 4 magnetic nanoparticles as the catalyst. doi: 10.1007/s z. doi: 10.1016/j.matlet . doi: 10.1021/acs.analchem.5b01775 33. Ageing in the inorganic nanoworld: example of magnetite nanoparticles in aqueous medium. doi: 10.1006/jcis.1997.5239. doi: 10.1016/s

Tổng hợp các hạt nano từ tính có đính kháng thể ứng dụng trong chẩn đoán bệnh

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. [17] Wotschadlo, J., et al., Biocompatible multishell architecture for iron oxide nanoparticles. [18] Ranjbakhsh, E., et al., Enhancement of stability and catalytic activity of immobilized lipase on silica-coated modified magnetite nanoparticles. [19] Gao, S., et al., Synthesis and Characterization of Fe(10)BO3/Fe3O4/SiO2 and GdFeO3/Fe3O4/SiO2: Nanocomposites of Biofunctional Materials. [20] Sun, H., et al., Synthesis of size-controlled Fe3O4@SiO2 magnetic nanoparticles for nucleic acid analysis

Advances in polymer based Friedlander quinoline synthesis

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Sulfamic acid supported on Fe 3 O 4 @SiO 2 superpara magnetic nanoparticles as a recyclable heterogeneous catalyst for the synthesis of quinolines. Preparation of trifluoroacetic acid-immobilized Fe 3 O 4 @SiO 2 -APTES nanocatalyst for synthesis of quinolines. Fe 3 O 4 @SiO 2 -imid-PMA n magnetic porous nanosphere as reusable catalyst for synthesis of polysubstituted quinolines under solvent-free conditions.

Activation of peroxymonosulfate by cobaltimpregnated biochar (Co-SCG) for efficient degradation of tetracycline in water

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Radical induced degradation of acetaminophen with Fe 3 O 4 magnetic nanoparticles as heterogeneous activator of peroxymonosulfate. Activation of persulfate (PS) and peroxymonosulfate (PMS) and application for the degradation of emerging contaminants. https://doi.org/10.1016/j.cej

Gold-assembled silica-coated cobalt nanoparticles as efficient magnetic separation units and surface-enhanced Raman scattering substrate

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Magnetic behavior of gold nanoparticle-attached silica-coated cobalt nanoparticles. Magnetic properties of the Co@SiO 2 /AuNPs nanoparticles were characterized by using a vibrating sample magnetometer (VSM) at 300 K. Magnetic properties of the final structure were investigated with an ADE. FE-SEM images of Co@SiO 2 /AuNPs nanoparticles prepared at various AuNPs-Co@SiO 2 volume ratios (v/v): (a) 0.1, (b) 0.5, (c) 1, (d) 2 (e) 3, and (f) 4..

Poly (I:C)- and doxorubicin-loaded magnetic dendrimeric nanoparticles affect the apoptosis-related gene expressions in MCF-7 cells

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Poly (I:C)-bound DOX-loaded magnetic dendrimeric nanoparticles (PIC-G 4 -DOX) were improved to obtain an efficient drug delivery system as explained in our previous studies (Khodadust et al., 2014). Poly (I:C) was then bound covalently onto the surface of G 4 -DOX nanoparticles through the 1-ethyl-3-(3- dimethylaminopropyl) carbodiimide hydrochloride (EDC) activation method (Sheehan et al., 1961).