Background: Polymer composites when reinforced with heavy metals in the form of micro/nano particles are efficient gamma- and X-ray shielding materials providing such advantageous features as cost-effectiveness, light-weight factor, flexibility, non-toxicity, conformability over conventional shields. Materials and Methods: In this paper the influence of weight percentages and particle sizes of ...

background: thalassemia/haemoglobinopathy is a hereditary disease with increased erythropoiesis and expansion of the bone marrow cavity. consequently, there is a reduction in trabecular bone tissue resulting in osteopenia/osteoporosis. the present study was performed to determine bone mineral density (bmd) in children and adolescents with major thalassemia and its correlation with serum ferriti...

Pumpkin leaves grown under high light (500-700 micromol of photons m-2.s-1) were illuminated under photon flux densities ranging from 6.5 to 1500 micromol.m-2.s-1 in the presence of lincomycin, an inhibitor of chloroplast protein synthesis. The illumination at all light intensities caused photoinhibition, measured as a decrease in the ratio of variable to maximum fluorescence. Loss of photosyst...

In the present study, temporal behavior of entanglement between photonic binomial distributions and a two-level atom in a leaky cavity, in equilibrium with the environment at a temperature T, is studied. In this regard, the master equation is solved in the secular approximation for the density matrix, when the initial photonic distribution is binomial, while the atomic states obey the Boltzmann...

Beam emission spectroscopy measures electron density from the Doppler-shifted light emission of a heating beam excited by beam-plasma particle collisions [1]. From the measured light intensity one can calculate the electron density after proper calibration. If sufficient light is available, this technique enables us the study of electron density fluctuations and their spatial distribution via t...

Photon counts were measured every 15 ms for 75 s from microtubule-enriched preparations (and nuclei) from mouse melanoma cells during baseline and after 2 min exposures to 1 μT magnetic fields. The magnetic fields were generated from a circular array of solenoids and presented with accelerating or decelerating rotation velocities. The range of photon radiant flux density was in the order of 10−...

We present in this paper analyses of the ROSAT PSPC and ASCA SIS and GIS observations of the Crab-like supernova remnant (SNR) G54.1+0.3. Its spectrum obtained by ROSAT PSPC favors a power law model with a photon index of -0.8 −2.0, absorbed energy flux in 0.1-2.4 keV of 1.0×10 erg cm s, and absorption column density of 12.3 −3.2 × 10 21 cm. ASCA SIS observation shows that its spectrum can also...

simulation of gamma and hadron showers in the energy range 100gev- 25tev has been carried out. for a big ideal cherenkov light array, characteristics of lateral distribution of cherenkov photon density have been studied. results from this ideal detector are compared with those simulated for a real tunka- like array to investigate experimental potential of using existence of a hump in lateral di...