Applied Mechanics and Materials Vol. 454

Abstract: The crystals of 3-indolepropionic acid have been obtained by evaporation from ethanol solution. The crystal structure of the 3-indolepropionic acid was determined by X-ray single crystal diffraction analysis. The crystal data for 3-indolepropionic acid: monoclinic, space group P2(1)/c, a = 14.3592(8) Å, b = 5.2446(2) Å, c = 12.3518(6) Å, V = 926.96(8) ų, Z = 4, Mr = 189.21, De = 1.356 g/cm³, T = 298(2) K, F (000) = 400, R = 0.0435 and wR = 0.1010. The compound forms one-dimensional chained structure through hydrogen bonds and π-π interaction.

Abstract: The crystals of one-dimensional chained polymer constructed by 3-indolepropionic acid and 2,2-bipyridinium have been synthesized by evaporation from ethanol solution. The crystal structure of one-dimensional chained polymer was determined by X-ray single crystal diffraction analysis. The results shows that the polymer belongs to monoclinic, space group P2(1)/c, a = 5.2557(11) Å, b = 12.249(2) Å, c = 21.467(4) Å, V = 1380.1(5) ų, Z = 2, Mr = 531.58, De = 1.279 g/cm³, T = 293(2) K, F (000) = 558, R = 0.1136 and wR = 0.3376. The compound forms one-dimensional chained polymer through hydrogen bonds. 3D network structure was constructed by the interaction of the one-dimensional chained polymer.

Abstract: A Thermocoupletemperature measurement test of grinding for steel 45 was done to analyse thereason of errors between experimental temperature curve and theoreticaltemperature curve derived by triangular distribution heat source model.It wasshown that,errors of influencing factors,such as grinding heat flow,thermalconductivity,density,specific heat capacity,limited grinding energy andeffective abrasive contact radius,have certain effect on temperature measuredby thermocouple.It was found that the influence of grinding heat flow into aworkpiece is the biggest and the effective radius of abrasive contact thesmallest.It is concluded that as long as the error of each influencing factoris controlled in a certain range,thermocouple measuring temperature curve willmatch with theoretical temperature curve closely.

Abstract: A novel porous ferromagnetic glass-ceramic has been synthesized with glassceramic and hydroxyapatite for hyperthermia application. The glassceramic was obtained from a melt derived glass, and the hydroxyapatite was prepared via precipitation method with biological template (YEAST). Both components of such a mixture were sintered at 1000 °C for 1 hour in graphite. The sample was characterized by x-ray diffraction, scanning electron microscopy and magnetic measurements. This material exhibited magnetic behavior and porosity. The results show that porous ferromagnetic glass-ceramic, which saturation magnetization (Ms) of about 25 A·m²/kg and diameter of porous 30-50μm, was obtained.