Ultrasmall iron oxide nanoparticles: Synthesis, physicochemical, ..

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Synthesis of polycaprolactone: a review

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Synthesis of polycaprolactone: a revieww | 久刚 袁 - …

Green synthesis of nanoparticles is a perfect field of nanotechnology, which attracts great attention in the fields of medicine, pharmaceutical, electrical, technological and other science research areas. Mostly the nanoparticles synthesized through different chemical and physical methods, these approaches are complicated, expensive and cause potential environmental and biological hazards. Green synthesis of nanoparticles with the help of microorganisms as reducing agents is an efficient, cost effective, fast and eco-friendly in nature. In recent past, most of the scientist adopted green synthesis methods for the production of a narrow range of different types of nanoparticles like, copper, gold, iron, silicon, silver and zinc from various microorganisms. [1, 2].

Synthesis of polycaprolactone: ..

Gold nanorods have been synthesized by photochemically reducing gold ions within a micellar solution. The aspect ratio of the rods can be controlled with the addition of silver ions. This process reported here is highly promising for producing uniform nanorods, and more importantly it will be useful in resolving the growth mechanism of anisotropic metal nanoparticles due to its simplicity and the relatively slow growth rate of the nanorods.

Synthesis and properties of Polycaprolactone‐ graft …

Preparation of Porous Polycaprolactone Scaffold Entrapped with Naringin Loaded Bovine Serum Albumin Nanoparticles (PS-N-BSANP)

Different techniques of synthesizing magnetite nanoparticles have been developed such as sol gel synthesis, chemical vapor condensation, flame synthesis, laser ablation and reverse microemulsion [3]. These chemical and physical methods owe some disadvantages like, sol gel synthesis has high raw materials cost, shrinkage and cracking may occur during the drying process and need very high temperature furnace or heating device. The chemical vapor condensation method requires higher temperature usually between 300-900°C, has a slower growth rate and usage of precursors are highly toxic (Ni(CO)4), explosive (B2H6) or corrosive (SiCl4). Laser ablation method limits wavelength of the laser impinging the metallic target, the duration of the laser pulses, the laser fluence, the ablation time duration and the effective liquid medium, with or without the presence of surfactants. Reverse microemulsion method limits its high cost and difficulties in removal of surfactants in [4, 5, 6]. In this study, we suggest a rapid, non-toxic, simple and biological synthesis method to form magnetite nanoparticles in only one step.

Ferrous chloride tetra-hydrate, ferric chloride hexa hydrate, and sodium hydroxide (NaOH) were obtained from Merck Co. as analytical grade. Magnetite nanoparticles (Fe3O4) synthesized as follows: 0.45 g of FeCl2.4H2O and 0.96 g of FeCl3.6H2O were dissolved in 100 mL of sterile deionized water in a 250 mL beaker and heated at 70℃ under mild stirring. After 15 minutes, 4 mL of the aqueous solution of Magnetospirillum was added to this solution, instantly the colour of the mixture changed from yellow to reddish brown. After 15 minutes, 10 mL of sodium hydroxide aqueous solution was added to the mixture with rate 5 mL/min to precipitate magnetite nanoparticles. After addition of sodium hydroxide, the reddish-brown solution changed to black suspension. The solution was cooled to room temperature and the magnetite nanoparticles were achieved by centrifugation. The magnetite nanoparticles were washed by dispersing in distilled water and centrifugation two times. The magnetite nanoparticles after washing were dried 12 hour at 80℃ for Uv-vis spectroscopy, TEM and DLS analysis.

Synthesis of polycaprolactone-titanium oxide multilayer ..

Encapsulation of exemestane in polycaprolactone nanoparticles: optimization, ..

N-BSANP was synthesized by coacervation process as described earlier [6,9]. In brief, naringin (2% w/w) was added to the 2% (w/v) of BSA in deionized water followed by one hour incubation at room temperature. After incubation, ethanol was added dropwise until turbidity under constant stirring. Further, coacervates were hardened with 8% glutaraldehyde, incubated for 2 hours under constant stirring. After incubation, nanoparticles were obtained by centrifugation at 18000g, 4°C for 30 minutes. The pellet was suspended in DPBS and washed thrice and freeze-dried. The entrapment efficiency was calculated from the amount of free naringin present in the supernatant using the formula

ABSTRACT: A biodegradable three-dimensional scaffolds have gathered attention and are widely studied for bone tissue engineering applications. In the present study, porous polycaprolactone scaffold entrapped with naringin loaded bovine serum albumin nanoparticles (PS-N-BSANP) has been engineered. Further, the prepared nanoparticles and interconnected porous scaffolds were characterized by scanning electron microscopy, X-ray diffraction and fourier transform infrared spectroscopy analysis. X- ray diffraction showed amorphization of naringin in PS-N-BSANP. In addition, sustained naringin release profile was observed from PS-N-BSANP for 12 days which showed a cumulative release of 52.54 micromolar (µM). Furthermore, conditioned medium from PS-N-BSANP showed an increased calcium deposition and collagen matrix formation under osteogenic conditions with C3H10T1/2 cell line. These results suggest that PS-N-BSANP enhanced the osteogenic differentiation potential in bone tissue engineering applications due to the controlled release of naringin.

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gold nanoparticles’ Synthesis of ..

Magnetite synthesis by Magnetospirillum bacteria and Fe(III)-reducing bacteria has been widely studied. In contrast, whether magnetite can be produced by Fe(II)-oxidizing bacteria stayed still obscure. In this work, we experimentally indicate that stable magnetite nanoparticles is formed using the nitrate reducing Fe(II)-oxidizing. Also the possibility of oxide nanoparticles synthesis using bacteria has been studied. Most of the works in this matter is centralized on production of magnetite nanoparticles, by magnetotactic bacteria (in nature). In these researches, nanoparticles synthesis was very slow under anaerobic conditions. It was exciting to understand the capability of bacterium Actinobacter sp to produce magnetite and magnetite under fully aerobic conditions. In this work, we showed the synthesis of magnetite nanoparticles using Magnetospirillum.

Nanoparticles of different types ..

This study was aimed at developing a polymeric drug delivery system for a steroidal aromatase inhibitor, exemestane (exe) intended for sustained targeted delivery of drug through intravenous route. Carboxylated polycaprolactone (cPCL) was synthesized by ring opening polymerization of caprolactone. Exe-loaded cPCL nanoparticles (NPs) were prepared by interfacial deposition of preformed polymer and characterized. A 3-factor, 3-level Box–Behnken design was used to derive a second-order polynomial equation and construct contour and response plots for maximized response of percentage drug entrapment (PDE) with constraints on particle size (PS). The independent variables selected were ratio of exe/cPCL, amount of cPCL, and volume of organic phase. Polymerization of caprolactone to cPCL was confirmed by Fourier transform infrared (FTIR) and gel permeation chromatography. The prepared NPs were evaluated for differential scanning calorimetry (DSC), transmission electron microscopy (TEM), and in vitro release studies. Optimum formulation based on desirability (1.0) exhibited PDE of 83.96 % and PS of 180.5 nm. Check point analysis confirmed the role of the derived polynomial equation and contour plots in predicting the responses. Zeta potential of optimized formulation was −33.8±2.1 mV. DSC studies confirmed the absence of any interaction between drug and polymer. TEM image showed non-aggregated and spherical shaped NPs. Drug release from NPs showed sustained release and followed Korsmeyer–Peppas model, indicating Fickian drug release. Thus, preparation of exe-loaded cPCL NPs with high PDE and desired PS suitable for providing passive targeting could be statistically optimized using Box–Behnken design.

Figure 3 illustrates synthesis of nanoparticles in a ..

We propose controlled release of naringin from a three-dimensional porous scaffold could increase its therapeutic potential in bone regeneration. In this study, three-dimensional porous polycaprolactone scaffold carrying bovine serum albumin nanoparticles loaded with naringin is fabricated and evaluated for its in vitro osteogenic potential using C3H10T1/2 cell line.

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