introduction: heavy ions are nucleus of elements of iron, argon, carbon and neon that all carry positive electrical charges. for these particles to be useful in radiotherapy they need to accelerated to high energy by more than thousand mega volts. also the cosmic environment is considered to be a complicated mixture of highly energetic photons and heavy ions such as iron. therefore, the health ...

Introduction: Heavy ions are nucleus of elements of iron, argon, carbon and neon that all carry positive electrical charges. For these particles to be useful in radiotherapy they need to accelerated to high energy by more than thousand mega volts. Also the cosmic environment is considered to be a complicated mixture of highly energetic photons and heavy ions such as iron. Therefore, the health ...

Ca depletion/Interphase death/Rat thymocytes Role of Ca ion in development of radiation damage of rat thymocytes was examined. Free DNA release, an expression of chromatin degradation, and the percentage of erythrosin B stained (dead) cells were increased after incubation of 1000 R X-irradiated thymocytes with normal Ca-containing medium. Incubation of the irradiated cells with Ca ion-depleted ...

The effects of ionizing radiation on the immune system relate primarily to the radiosensitivity of the small lymphocyte. Within the past several years, as our concepts of cell-cell interactions have evolved with emphasis on functional subsets of lymphocytes, it has become clear that subpopulations differ in their radiosensitivity (1). Further, the lymphocyte is unique, in that radiation-induced...

effective elastic properties for carbon nanotube reinforced composites are obtained through a variety of micromechanics techniques. an embedded carbon nanotube  in  a  polymer  matrix  and  its surrounding  interphase  is  replaced with an equivalent fiber for  predicting  the  mechanical  properties of  the  carbon  nanotube/polymer composite. the effects of an interphase layer between the nan...

in the current paper, finite element method is employed for numerical simulations and the study of influential parameters on elastic modulus of polymer-matrix nano-composites. effects of different key parameters including particle elastic modulus, interphase elastic modulus, matrix elastic modulus, interphase thickness and particle volume fraction on total elastic modulus of nano-composite mate...

A three-dimensional micromechanics-based analytical model is developed to study thermo-mechanical properties of polymer composites reinforced with randomly distributed silica nanoparticles. Two important factors in nanocomposites modeling using micromechanical models are nanoparticle arrangement in matrix and interphase effects. In order to study these cases, representative volume element (RVE)...