The need for novel, high performance actuators felt in several fields of robotics, such as assistive or rehabilitative robotics, is not fully satisfied by current actuation means. This fosters an intense research on novel energy transduction methods. In particular, propellant-based chemical actuators, able to directly convert chemical energy into mechanical energy, appear very promising, althou...

A purified and electrophoretically homogeneous blue laccase from the litter-decaying basidiomycete Stropharia rugosoannulata with a molecular mass of approximately 66 kDa oxidized Mn to Mn , as assessed in the presence of the Mn chelators oxalate, malonate, and pyrophosphate. At rate-saturating concentrations (100 mM) of these chelators and at pH 5.0, Mn complexes were produced at 0.15, 0.05, a...

We present a new method for the decomposition of an experimental absorbance matrix into concentration and molar absorption coefficient matrices. The decomposition in general is not unambiguous; therefore, the method may yield only ranges for these matrices. The experimental matrix is not changed, so deviations from the original data can be monitored element by element. Consequently, all chemica...

Liquid flow in microchannels is completely laminar and uniaxial, with a very low Reynolds number regime and long mixing lengths. To increase fluid mixing and solubility of reactants, as well as to reduce reaction time, complex three-dimensional networks inducing chaotic advection have to be designed. Alternatively, turbulence in the liquid can be generated by active mixing methods (magnetic, ac...

Hydrogen peroxide (H2O2) is an important chemical as it environmentally friendly oxidant for organic synthesis and environmental remediation well a promising candidate the liquid fuel. Photocatalytic generation of H2O2 sustainable, many efforts have been put into development new catalysts to gain high yields. In this investigation, Au/ZnO, Ag/ZnO Au-Ag/ZnO were prepared by simultaneous impregna...

background: polychlorinated biphenyls (pcbs) are occupational and environmental pollutants and hazardous organic compounds that have created major environmental and occupational challenges. pcb compounds have different health effects in humans depending on sex, age, route of entry, intensity, and frequency of exposure. this study was conducted to determine the effect of microwave rays, hydrogen...

Maghemite/magnetite nanocomposite (γ-Fe2O3/Fe3O4) was prepared via an electrochemical method using pulse alternating current and applied for electrocatalytic reduction sensing of hydrogen peroxide. The structural compositional analysis the γ-Fe2O3/Fe3O4 characterized by XRD, SEM, TEM XPS. Its thermal decomposition behavior studied TG/DSC. mechanism formation proposed. Furthermore, H2O2 performa...

Photocatalytic H2O2 evolution has received extensive attention as an environmentally friendly method, which is a dynamic process of formation and decomposition. At present, researches mainly focus on the formation, while decomposition rarely studied. In addition, platinum cocatalyst plays important role in enhancing photocatalytic activity, but effects valence state especially towards decomposi...

pure and zno-doped ni0.1co0.9fe2o4 catalyst were prepared by co-precipitation method and thermal decomposition in air calcinated at 400-700°c and that treated with different amounts of zinc nitrate (0.46-2.25 w% zno). x-ray powder diffractometry, scanning electron microscopy (sem) and bet analysis of nitrogen adsorption isotherms investigated the crystalline bulk structure and the surface area ...