A Study on the Characteristics of Cu–Mn–Dy Alloy Resistive Thin Films

Cu–Mn–Dy resistive thin films were prepared on glass and Al2O3 substrates, which wasachieved by co-sputtering the Cu–Mn alloy and dysprosium targets. The effects of the addition ofdysprosium on the electrical properties and microstructures of annealed Cu–Mn alloy films wereinvestigated. The composition, microstructural and phase evolution of Cu–Mn–Dy films werecharacterized using field emission scanning electron microscopy, transmission electronmicroscopy and X-ray diffraction. All Cu–Mn–Dy films showed an amorphous structure when theannealing temperature was set at 300 °C. After the annealing temperature was increased to 350 °C,the MnO and Cu phases had a significant presence in the Cu–Mn films. However, no MnO phaseswere observed in Cu–Mn–Dy films at 350 °C. Even Cu–Mn–Dy films annealed at 450 °C showedno MnO phases. This is because Dy addition can suppress MnO formation. Cu–Mn alloy filmswith 40% dysprosium addition that were annealed at 300 °C exhibited a higher resistivity of ∼2100 μΩ·cm with a temperature coefficient of resistance of –85 ppm/°C.

Copper nanoparticles prepared by pulsed exploding wire

In this work copper nanopowder was created at different liquidmedias like DDDW, ethylene glycol and Polyvinylpyrrolidone(PVP). Copper nanopowder prepared using explosion wire processand investigated the effects of the exploding energy, wire diameter,the type of liquid on the particle size, and the particles sizedistribution. The nanoparticles are characterized by x-ray diffraction,UV-visible absorption spectroscopy and transmission electronmicroscopy (TEM). The x-ray diffraction results reveal that thenanoparticles continue to routine lattice periodicity at reducedparticle size. The UV-Visible absorption spectrum of liquid solutionfor copper nanoparticles shows sharp and single surface Plasmonresonance (SPR) peak centered at a wavelength of 590 nm inethylene glycol media, but don’t have peak in PVP fluid. This peakindicated the production of pure and spherical copper nanoparticle.

Biophysical and Characterizations of Silver Nanoparticles used as Salmonella typhi Detector

The present study mainly focuses of combined action of Nepali hog plum as well as citrate synthesized silver nanoparticles (AgNPs) and Amikacin, as an antibiotic. The synergistic actions of citrate stabilized silver nanoparticles (AgNPs with chem) were compared with that of Nepali hog plum Choerospondia saxillaris (Lapsi) synthesized silver nanoparticles (AgNPs with plant), together with action of antibiotic onselected bacterial strains of Salmonella typhi. The synthesized AgNPs were characterized through UV-Vis spectroscopy, Transmission electronmicroscopy and X-ray diffraction technique. The size of the synthesized silver nanoparticles was measured by Transmission Electron Microscope (TEM) and X-ray diffraction (XRD).DOI: http://dx.doi.org/10.3126/ijasbt.v2i4.11127 Int J Appl Sci Biotechnol, Vol. 2(4): 510-515

Synthesis, characterization and controlled toxicity of a novel hybrid material based on cisplatin and docetaxel

This paper is focused on the synthesis and characterization of a novel hybrid material based on cisplatin and docetaxel-loaded functionalized simultanously carbon nanotubes able to be used in cancer therapy as drug delivery system with controlled toxicity. This material was physico-chemically investigated by determining the structure, as evidenced by Fourier transform infrared (FTIR) spectroscopy, transmission electronmicroscopy (TEM) and its stability was studied with the aid of thermogravimetric analysis (TGA). The amount of platinum ions released into the solution of simulated body fluid (SBF) was highlighted by coupled plasma mass spectrometry (ICP-MS). Toxicology experiments were performed with MDA-MB 231 breast cancer epithelial cells. The performance of the new drug delivery hybrid material was compared with functionalised carbon nanotubes with therapeutic agents functionalized with a single therapeutic agent.

An Automobile Exhaust Sensor Utilizing Cataluminescence on Nanosized Fe3O4/SiO2

Instrumentation was constructed for the detection of automobile exhaust utilizing cataluminescence method on nanosized Fe3O4/SiO2.The microspheres with a diameter of about 450 nm, were synthesized by the hydrolyzation of tetraethyl orthosilicate (TEOS). The scanning electronic microscopy (SEM), transmission electronmicroscopy (TEM) and energy dispersive spectroscopy (EDS) were employed to characterize the microspheres. Automobile exhaust, a harmful gas, was selected as a model to investigate the cataluminescence sensing properties of the SiO2/Fe3O4 microspheres in the current work. Results indicated that the microspheres exhibited outstanding cataluminescence properties. The performance of the SiO2/Fe3O4 microspheres based sensor instrument suggested the promising application of the SiO2/Fe3O4 nanomaterials for the detection of automobile exhaust.

The effect of compressed air massage on untraumatised rabbit skeletal muscle - a morphometric and ultrastructural study

One of the therapeutic uses of massage is to facilitate repairof damaged tissue. A potential hazard of massage is that direct pressure onmuscle is known to damage skeletal myofibres. This study examines theeffect of a new form of massage using compressed air on the morphology ofuntraumatised rabbit skeletal myofibres. Under anaesthetic, the left and right vastus lateralis muscles of 16 New Zealand, white rabbits were treated with 10 minutes of compressed air therapy at 1 Bar using a single hole (5 mm) applicator head and control biopsies were taken from the opposite limb. Biopsies were prepared for light microscopy and transmission electronmicroscopy. Morphometry, using image analysis revealed a significant increase in myofibre diameters 10 minutes (p < 0.001) and 24 hours (p<0.01) after compressed air massage. Six days after treatment diameters were significantly reduced (p < 0.01). Morphologically, myofibres in control specimens were normal. Shortly after compressed air massage, juxta-nuclear and intermyofibrillar oedema was present and electron-lucent spaces were filled with swollen mitochondria and elements of the sarcoplasmic reticulum (SR). Glycogen and other non-contractile organelles were sometimes aggregated in oedematous, sub-sarcolemmal regions. Twenty four hours after treatment, intermyofibrillar oedema was reduced, but SR swelling remained and many fibres were characterised by focal and large areas of myofibrillar disorganisation. With the exception of occasional swollen elements of the SR and a single internalised nucleus, myofibres morphology had returned to normal 6 days after treatment. Compressed air massage causes less damage to skeletal myofibres than a similar form of localised pressure treatment, deep transverse frictions. Clinicalstudies using this new modality are warranted.

Meniscus and Synovial Membrane: An Electronmicroscopic Study on Rabbits

Seven healthy mature rabbits were used to study both the surface morphology of the meniscus using both transmission electronmicroscopy (TEM) and scanning electronmicroscopy (SEM) and articular cartilage of the femoral condyle using SEM. Results showed that the membrane covering the meniscus was structurally the extension of synovial membrane of the knee joint capsule. Additionally, the presence of canal-like openings over the membranous surface to the meniscus was noted, which were absent over the articular cartilage surface. Key words: transmission and scanning electronmicroscopy, meniscus, articular cartilage, rabbits

Ab-Initio Study of the Local Bonding at Metal-Ceramic Heterophase Boundaries

ABSTRACTThe adhesion geometries of the (100) heterophase boundaries between the metals Al or Ag and spinel (MgAl2O4) were determined by density-functional calculations employing a mixed-basis pseudopotential method. The results compare well with high-resolution transmission-electronmicroscopy studies which were carried out in parallel. An analysis of the calculated electronic structures shows that the strong adhesion of Al on spinel is mediated by directional bonding. The comparatively weak interaction of spinel with Ag is dominated by polarization effects which can be classified as originating from an image-charge interaction. Additionally, the effects of changes in stoichiometry and of segregated substitutional atoms at the interface were analyzed in terms of the excess of the corresponding component at the interface. The implications for the geometric structure and the related mechanical properties at the metal-ceramic junctions are discussed.