International Journal of Nanoparticle Research

This letter is a contribution on the study of nanoparticles for in situ observation and general understanding of nanoparticle physics. The positing that “chemical” effects from alpha emitters found by researchers actually come from the particular physical effect demonstrated with firmness here is not always possible (as alpha decay also interferes) but a case where this is definitive is given.

Most of the killed, inactivated, or live-attenuated pathogen vaccines are now replaced by modern vaccines containing isolated, highly purified antigenic protein subunits which are safer than live viruses or deactivated viruses. Another strategy is the development of nanoparticles which can mimic the repetitiveness, geometry, size and shape of the host-pathogen surface and provide improved stability and long lasting immunogenicity, as well as serve as vehicles to deliver multiple copies of the antigens to the target cells. Several interesting advances have been made recently in the area of protein nanotechnology and here, we provide a concise review of one such novel nanoparticle called FluoDot which may be effectively used as a delivery system in some veterinary medicine applications.

Single crystals of thiosemicarbazide magnesium chloride (TSCMC) a semi organic nonlinear optical (NLO) material have been grown from aqueous solution by a slow evaporation technique. The grown crystals have been subjected to single crystal X-ray diffraction studies to identify of the structure. FTIR and optical transmission spectra reveal the optical properties of the grown crystals. The thermal behavior of TSCMC was investigated using the TG–DTA studies. Dielectric measurements were made over a wide range of frequencies for different temperatures. The second harmonic generation (SHG) efficiency for the grown crystals was determined using the Kurtz powder technique.

Nanobiotechnology holds a great potential in various fields of life sciences. Nanotechnology involves the use of materials with components that have dimensions less than 100nm. The demand for biosynthesized nanoparticles increased day by day due to its ecofriendly and compatibility when compare to chemical method of synthesis. Application of nano-sized materials is an emerging area of nanotechnology. Molybdenum (Mo) nanoparticle was synthesized using fast, convenient, eco-friendly biological method from the aqueous extract of plumbago zeylanica. The same was synthesized using sol-gel method also. The nanoparticles synthesized by both the methods were characterized by Fourier transform infrared spectroscopy (FTIR), ultra violet spectroscopy (UV), scanning electron microscopy (SEM) and x-ray diffraction spectroscopy (XRD) studies. Molybdenum nanoparticles were found to be inhibiting the growth of bacteria and also act as effective catalyst.

A melamine-based dendrimer was used to prepare a new class of heterogeneous Pd/Cu bimetallic nanoparticles (NPs). The physicochemical characteristics of Pd/Cu bimetallic NPS were studied with the aid of SEM, EDX, XRD, TG& DSC techniques. Leafs shape surface morphology and the presence of required palladium and copper ion were observed from SEM and EDX analysis respectively while TG& DSC showed good thermal stability, as well as XRD, revealed nano-shape FCC structure. The recycling ability of the catalyst was examined for five successive runs without any noteworthy loss of activity. The synthesized Pd/Cu bimetallic NPS exhibited high catalytic activity in the synthesis of ynone in which synthetic route was phosphine ligand-free.

A moisture-stable diazine-based dendrimer assisted heterogeneous bimetallic Pd/Co nanoparticles (NPs) was synthesized which showed a simple, profitable and environmentally sustainable operation for the Sonogashira reactions under copper and solvent-free conditions with regained easily and recycled four times without substantial activity loss. Furthermore, the dendrimer was analyzed by IR, 1H NMR, 13C NMR, and elemental analysis whereas the Pd/Co bimetallic NPs was characterized by EDX, TGA & DSC, and XRD techniques.

This paper focuses on the effect of MHD mixed convection flow of casson nanofluid past a stretching sheet in the presence of viscous dissipation, first order chemical reaction and heat source/sink. The profiles for the velocity, temperature and nanoparticle concentration depends on the parameters Casson fluid parameter β, concentration buoyancy parameter N, Hartman number M, radiation parameter R, Prandtl number Pr, the Schmidt number Sc, Brownian motion Nb, thermophoresis parameter Nt, Eckert number Ec, chemical reaction parameter γ the heat transfer Biot number γ1 and the mass transfer Biot number γ2. The constitute governing partial differential equation of flow, heat and mass transfer on considered flow are converted into nonlinear ordinary differential equations by employing suitable transformations and these transformed equations were solved by the Adam’s Moultan fourth order method with shooting technique. The various numerical tables are calculated and tabulated. Our results have been compared with the results of a previous study and found to be in an excellent agreement.

The main objective of the present work was to prepare pomegranate peel extract based nano particles by chemical complexation method. Ethanolic extracts of pomegranate peel were prepared by using Soxhlet apparatus and evaluated for phyto-chemical constituents. Qualitative analysis showed that pomegranate peel extract showed positive results for alkaloids, anthraquinones, saponins and terpenoids. The percentage moisture content and pH of the extract was found to be 72% and 3.6 respectively. A zeta potential and particle size of prepared nanoparticles was found in the range of -24.6 to– 34.5 mV and 118.6 nm to 231.7 nm, respectively. These range confirms that obtained particles were in nano range, i.e.

Background The powders of Ni-Cr Nano ferrites were synthesized with the chemical formula, NiCrXFe2−XO4 (Where X = 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0) by using citrate-gel auto combustion technique. The structural characterization was investigated by X-Ray Diffractomerter (XRD). X-ray analysis shows that the samples are cubic spinel structure (single phase) without any impurity peak and average crystallite size was in the range of 8.5-10.5nm. The dielectric measurements were carried out as a function of frequency and composition (X) at room temperature in the range of 20Hz-2MHz. The real part of dielectric constant (ε’) and dielectric loss factor (tan δ) showed a decreasing trend with increasing field frequency. The ac conductivity (σac) is calculated from the dielectric measurements and it is increased with the increase of frequency. The composition dependent dielectric parameters are reported.

Zinc Bismuth nanoparticles with chemical composition of ZnBi2O4 is prepared by chemical citrate gel auto combustion method by using citric acid as fuel. The synthesized nano particles are sintered at different temperatures like 300OC, 400OC, 500OC, & 600OC for 4 hours in air medium. The single phase cubic structure is confirmed by X-ray diffraction, the average crystallite sizes of these samples are found to be in the order of 34 nm to 60 nm. The surface morphology of the samples is studied by using Scanning Electron Microscopy. The EDS spectrum confirms the presence of Bismuth, Zinc and Oxygen without any precipitating cations. FT-IR spectroscopy confirms the formation of spinel structure, the average particle sizes of the samples are measured by using DLS technique.