The phase behavior of model athermal silica ~radius R550 nm!–polystyrene–toluene suspensions has been determined over nearly two orders of magnitude in polymer or colloid size asymmetry. Fluid–gel, fluid–crystal, and fluid–fluid transitions are observed as Rg , the polymer radius of gyration, increases. Based on the polymer concentration relative to the dilute–semidilute crossover density, cp /...

background: the compositions of ferrous sulphate, agarose and xylenol orange dye (fax) and ferrous sulphate, gelatin and xylenol orange dye (fgx) in solution of distilled water and sulphuric acid are two tissue-equivalent gel dosimeters. ionizing radiation causes oxidation of fe2+ ion to fe3+ ions which diffuse through the gel matrix and blur the image of absorbed dose over a period of hours af...

In a nematic gel we observe a low-energy buckling deformation arising from soft and semisoft elastic modes. We prepare the self-assembled gel by dissolving a coil-side-group liquid-crystalline polymer-coil copolymer in a nematic liquid crystal. The gel has long network strands and a precisely tailored structure, making it ideal for studying nematic rubber elasticity. Under polarized optical mic...

We have performed small angle neutron scattering measurements (SANS) on dilute aqueous dispersions of polymer microgel particles as a function of temperature, T . The microgel particles are spherical crosslinked assemblies of a loose gel network of a poly-N-isopropylacrylamide (NIPAM) polymer. When the temperature is raised beyond a critical temperature, T(lc) approximately 32 degrees C , the p...

Introduction: Radiotherapy involves all methods that can provide a special amount of ionizing radiation to malignant tissue with the assumption that minimal damage to healthy tissues is achieved. We are looking for a valuable and reliable method to measure the absorption dose and also the ability to measure the absorption dose distribution in three dimensions, which today is th...