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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Nanoanalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Fluoride MgO,FCN,NPs Response Surface Methodology Isotherm Kinetic
- چکیده:
- چکیده انگلیسی: Deleterious effect of high concentration fluoride in water resources on the health
of human. The MgO supported Fe-Co-Mn nanoparticles were produced via coprecipitation
method and characterized by SEM and FTIR techniques. In the work,
the adsorption process optimization was performed by response surface modeling
with the help of Minitab 16 software. The effect of independent parameters such
as pH ( 3-11), the initial dose (0.02-0.1 g/L), the initial concentration of the fluoride
(10-50 mg/L) and reaction time (30-180 min) were optimized to obtain the best
response of fluoride removal using the statistical Box-Behnken in response
surface modeling procedure. Conditions for the pH(5), the initial concentration
of nanoparticle (0.05 g/L), the initial concentration of fluoride (50 mg/L) and the
process time(90 min) were obtained as Min respectively. Under these conditions,
the removal efficiency of the fluoride by MgO capped Fe-Co-Mn nanoparticles
equal to 84.64% were achieved. ANONA high correlation coefficients for the
proposed model was also obtained (adjusted –R2=0.9993 and R2=0.9984). The
equilibrium data were analyzed using Langmuir, Freundlich, Temkin and Dubinin-
Radushkevich isotherm models. The Langmuir model was found to be describing
the data. Kinetic studies showed that the adsorption followed a pseudo-second
order reaction.- انتشار مقاله: 11-08-1399
- نویسندگان: Somayeh Rahdar,Leili Mohammadi,Abbas Rahdar,Shahin Ahmadi,Saeideh Sistani,Md. Abu Bin Hasan Susan
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Nanoanalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: toxicity,activity,ceria nanoparticles,method of synthesis,enzyme mimicking,Biological application
- چکیده:
- چکیده انگلیسی: Metal oxide nanoparticles due to their antioxidant properties have attracted
significant attention and exhibited good potential for use in cancer theranostics.
Owing to the poor absorption in the physiological environment, they are an
ideal candidate to act as nanocarriers in targeted drug delivery and bioimaging.
This feature can be successfully implemented in live monitoring and imaging
applications, which offer the possibilities and scope for optical, magnetic
resonance, and nuclear imaging. The environment of malignant cells like
the rapid proliferation of cells, specific antigen expressions, and leaky tumor
vasculature can be used by the modifications in their morphology and surface
functionalization. Ceria (CeO2) nanoparticles have been fascinating in this regard.
Different properties such as size, agglomeration behavior, and surface charge
density facilitate the interaction of nanoparticles with cancer cells. Compared to
other nanoparticles, CeO2 nanoparticles have a potential for pharmaceutical use
since they can act as a therapeutic agent in different disorders such as cancer,
inflammation, and neurodegeneration, due to the ability to exhibit variable
oxidation state at the nanoparticle surface. Recent literature reports the ecofriendly
or ‘green’ synthesis of CeO2 nanoparticles in which the biological agent
acts as stabilizers for a cost-effective and feasible mode of preparation. In this
review, we focus on recent literature on CeO2 nanoparticles with an emphasis on
the methods of fabrication and biomedical applications.- انتشار مقاله: 09-08-1399
- نویسندگان: Zahra Yaghoobi,Abbas Rahdar,Vishnu Sankar,Nooshin Amini
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Nanoanalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Spectroscopy,Dye,Microemulsions,Acridine orange
- چکیده:
- چکیده انگلیسی: Cationic dye Acridine orange (AO) has wide applications especially in biological
fields such as analysis of lysosomal and mitochondria content by flow cytometry
and so on. In the current work, spectroscopy of acridine orange (AO) dye at both
low concentrations (mdye/mwater=6.25×10-5, 3.12×10-5) and high concentrations
(mdye/mwater=0.002, 0.001) was studied in confined water nanodroplets within
water/AOT/n-hexane microemulsions (MEs) at a constant water content (W=
[Water]/[AOT]=10) and as a function of mass fraction of droplet (MFD) using
absorption and fluorescence spectroscopic techniques. The absorption spectra
of the dye at high concentrations of Acridine orange (AO) dye molecules showed
that the absorption spectra of the samples deviated from Beer’s law, and are
broadened at larger MFD due to the interactions of AO dye molecules. The
fluorescence spectrum investigated at two higher concentrations (0.002, 0.001)
and low concentrations (6.25×10-5, 3.12×10-5). At high concentration of the dye,
quenching of fluorescence intensity observed due to the accumulation of the dye
molecules, coupled with a red shift with increasing MFD. However, in the lower
concentration regime, enhancement of fluorescence intensity was observed with
increasing MFD. The Stokes’ shift of the dye for both high and low concentrations
increased with MFD, but largely at high concentrations compared to that at low
concentrations.- انتشار مقاله: 03-06-1399
- نویسندگان: Mousa Aliahmad,Abbas Rahdar,Havva Esmailzaee Ghale Kohne,Bijan K. Paul
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Nanostructures
- نوع مقاله: Journal Article
- کلمات کلیدی: AOT,D-(+)-Glucose,Dynamic light scattering Interaction,Nano-droplets
- چکیده:
- چکیده انگلیسی: In the present research, the D-(+)-Glucose–confined water nanodroplets with mean size in the range of 6-11 nm were synthesized at D-(+)-Glucose different concentrations by AOT reverse micelles (RMs) method as a function of mass fraction of droplet (MFD) at the constant water-to-surfactant molar ratio ( W=40). The dynamic light scattering of the nano-sized water droplets containing the D-(+)-Glucose monosaccharide showed that interaction between the nanometer-sized AOT droplets changed from attractive to repulsive as the hydrophilic D-(+)-Glucose concentration increased as a function of MFD. The hydrodynamic diameter of water droplets increased as concentration of D-(+)-Glucose monosaccharide decreased in the water-in-oil AOT microemulsion.
- انتشار مقاله: 22-10-1396
- نویسندگان: Abbas Rahdar,Mohammad Almasi-Kashi
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Nanochemistry
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: In the current work, nickel oxide (NiO) and copper-doped nickel oxide (Cu-NiO) nanoparticles were prepared by co-precipitation method. The effect of Cu doping on the structural and optical features of NiO nanoparticles and the effect of solvent and temperature on the optical and structural properties of nickel oxide and Cu-doped nickel oxide nanoparticles were studided by X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy, fourier transform-infrared (FT-IR) spectroscopy and vibrating-sample magnetometer (VSM) technique. The XRD analysis condirmed that the Cu-doped nickel oxide have a cubical structure and showed that the crystalline size increased with the increase of temperature. The optical absorption spectra of the structures illusterated a blue-shift with decreasing in crystal size so that the energy gap of nickel oxide decreased with increasing temperature. Subsequently, in the presence of propranol and without ethylene glycol, the Cu-doped NiO band gap was the lowest and with the applying of ethanol and ethylene glycol was the highest amount. Magnetization property study of the nanoparticles performed at room temperature confirmed the weak ferromagnetic behavior of Cu-doped NiO nanoparticles before calcinations. The magnetization in the magnetic hysteresis loop indicated that nanoparticles have super paramagnetic property after calcination.
- انتشار مقاله: 04-08-1397
- نویسندگان: Khalilollah Sayyadi,Mahsa Gharani,Abbas Rahdar
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Nanochemistry
- نوع مقاله: Journal Article
- کلمات کلیدی: cancer,Gold,Metallic nanoparticles,Nanocarriers
- چکیده:
- چکیده انگلیسی: Gold metallic nanoparticles have received a great and well-deserved attention due to their wide application in different fields of scientific and technology, especially biological and therapeutic applications such as cancer diagnosis and treatment according to their advantages including biocompatibility, low toxicity, controlling size and shape, easy synthesis, selective accumulation in cancer cells, high activity, and optical properties. The targeted nanocarriers have given new hope in order to the treatment of this disease all over the world. Understanding the medical effects of gold nanoparticles is a key issue for their rational and efficient design. Regarding this issue, the reported studies indicate that the quality of therapy and identification process of diseases has improved according to gold nanoparticles. It is expected that in the near future, these nanomaterials will provide the most fruitful therapeutic results. With this in mind, this mini-review tries to address new targets for cancer cells, new ways to target based on gold nanoparticles as well as stabilizing nanoparticles locally on cancer cells and the resulting degradation of side effects.
- انتشار مقاله: 15-08-1397
- نویسندگان: Khalilollah Sayyadi,Abbas Rahdar,Neda Esmaili,Jalil Sayyadi
- مشاهده