Effect of Holmium Ion Doping on Structural and Photo-Physical Properties of Iron Oxide Nanoparticles

2019 ◽  
Vol 14 (8) ◽  
pp. 1183-1188 ◽  
Author(s):  
Ruqiya Bhat ◽  
G. N. Dar
Keyword(s):  
Iron Oxide ◽  
Physical Properties ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Ion Doping ◽  
Holmium Ion

Photo-fluorescent and magnetic properties of iron oxide nanoparticles for biomedical applications

Nanoscale ◽  
2015 ◽  
Vol 7 (18) ◽  
pp. 8209-8232 ◽  
Author(s):  
Donglu Shi ◽  
M. E. Sadat ◽  
Andrew W. Dunn ◽  
David B. Mast
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Physical Properties ◽  
Iron Oxide Nanoparticles ◽  
Basic Science ◽  
Biomedical Applications ◽  
Oxide Nanoparticles ◽  
Nanometer Range

Iron oxide exhibits fascinating physical properties especially in the nanometer range, not only from the standpoint of basic science, but also for a variety of engineering, particularly biomedical applications.

scholarly journals Effect of Iron Oxide Nanoparticles on the Physical Properties of Medium Density Fiberboard

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2911 ◽  
Author(s):  
Waheed Gul ◽  
Hussein Alrobei ◽  
Syed Riaz Akbar Shah ◽  
Afzal Khan
Keyword(s):  
Iron Oxide ◽  
Physical Properties ◽  
Iron Oxide Nanoparticles ◽  
Urea Formaldehyde ◽  
Medium Density Fiberboard ◽  
Oxide Nanoparticles ◽  
Medium Density ◽  
Fe2o3 Nanoparticles ◽  
Thickness Swelling ◽  
Composite Samples

This paper investigates the influence of iron oxide (Fe2O3) nanoparticles on the physical properties of medium density fiberboard (MDF). In this study, three different nano iron oxide loadings, i.e., 0.5, 1.5 and 2.5 wt %, and untreated poplar fibers were used. The iron oxide (Fe2O3) nanoparticles were initially dispersed into urea formaldehyde resin using a high-vacuum mechanical stirrer before being incorporated into natural fibers. The untreated poplar fibers were wound onto metal frames to produce dry mat layers. Twenty different composite samples were made. All composite samples were tested for physical properties, i.e., thickness swelling, water absorption, moisture content and density in accordance with standards EN-317, ASTM D570, EN-322 and EN-323 respectively. Based on the results, it was found that the incorporation of homogeneously dispersed iron oxide nanoparticles significantly improved thickness swelling (Ts). Moreover, water absorption (WA) improved by up to 49.18 and 34.54%, respectively, at the highest loading of 2.5 wt %. Microstructure was investigated and characterized with scanning electron microscopy (SEM), x-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) and we examined whether iron oxide nanoparticles exhibit good interactions with urea formaldehyde and poplar wood fibers. Heat and mass transfer investigation in the form of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) was carried out due to the impact of Fe2O3 nanoparticles. The curing temperature and thermal stability of the resin were enhanced due to the addition of Fe2O3 nanoparticles. A one-way ANOVA statistical analysis was established to effectively control the use of Fe2O3 nanoparticles. Therefore, the presence of iron oxide nanoparticles in an epoxy polymer contributes to a stiffer matrix that, effectively, enhances the capability of improving the physical properties of nano MDF.

TARGETING CYCLIN B1 WITH ANTISENSE OLIGONUCLETOTIDES- COATED SUPERPARAMAGNETIC IRON OXIDE NANOPARTICLES

2018 ◽  
Vol 6 (10) ◽  
Author(s):  
Hosam Zaghloul ◽  
Doaa A. Shahin ◽  
Ibrahim El- Dosoky ◽  
Mahmoud E. El-awady ◽  
Fardous F. El-Senduny ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Cellular Uptake ◽  
Superparamagnetic Iron Oxide ◽  
Cyclin B1 ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Mcf7 Cells ◽  
M Phase ◽  
The Impact

Antisense oligonucleotides (ASO) represent an attractive trend as specific targeting molecules but sustain poor cellular uptake meanwhile superparamagnetic iron oxide nanoparticles (SPIONs) offer stability of ASO and improved cellular uptake. In the present work we aimed to functionalize SPIONs with ASO targeting the mRNA of Cyclin B1 which represents a potential cancer target and to explore its anticancer activity. For that purpose, four different SPIONs-ASO conjugates, S-M (1–4), were designated depending on the sequence of ASO and constructed by crosslinking carboxylated SPIONs to amino labeled ASO. The impact of S-M (1–4) on the level of Cyclin B1, cell cycle, ROS and viability of the cells were assessed by flowcytometry. The results showed that S-M3 and S-M4 reduced the level of Cyclin B1 by 35 and 36%, respectively. As a consequence to downregulation of Cyclin B1, MCF7 cells were shown to be arrested at G2/M phase (60.7%). S-M (1–4) led to the induction of ROS formation in comparison to the untreated control cells. Furthermore, S-M (1–4) resulted in an increase in dead cells compared to the untreated cells and SPIONs-treated cells. In conclusion, targeting Cyclin B1 with ASO-coated SPIONs may represent a specific biocompatible anticancer strategy.

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