The microstructure of selected specimens in the (Y,Ce)-TZP-Al2O3 composite systems was studied. The investigation techniques used in this work included X-ray diffractometry ( XRD ) , Scanning Electroscope ( SEM ) , Transmission Electroscope (TEM), X-ray Energy Dispersion Analysis(EDAX) and High Resolution Electron Microscopy (HREM). Based on the experimental results, the relationship between microstructure and mechanical properties of the specimens was discussed. 相似文献
In this paper an analytical solution is proposed for the bending of uniformly loaded rectangular plates supported only by four intermediate columns, the edges and corners of which are all free. For several particular cases, the numerical results, which contain the column reaction and the values for the deflection and the bending moments at several points of the plate, are given.Calculations indicate that the method proposed in this paper is valid. 相似文献
Using the TAM air isothermal microcalorimeter, the thermogenic power–time (HP–time) curves of isolated mitochondrial energy metabolism were measured, and the effects of six alkaloids from Radix Aconite Lateralis Preparata (Fuzi) including mesaconitine, aconitine, hypaconitine, benzoylmesaconine, benzoylaconine, and benzoylhypaconine on mitochondrial energy metabolism were investigated. Some quantitative information, such as k, Pmax, Tmax, Q, Pav, and Tlag, was obtained from the HP–time curves. The results revealed that mesaconitine, aconitine, and hypaconitine had inhibitory effect on rat-isolated mitochondrial energy metabolism, and their IC50 value was 1.82, 2.22, and 2.48 μg mL−1, respectively, while benzoylmesaconine, benzoylaconine, and benzoylhypaconine promoted mitochondrial energy metabolism, and their EC50 value was 30.95, 14.36, and more than 30 μg mL−1, respectively. Further structure–activity relationship analysis showed that the ester bond in C(8) position, hydroxyl in C(3) position, and ethyl in N atom could significantly influence the energy metabolism. These results provide scientific basis for the treatment of mitochondrial abnormalities and energy dysfunction diseases using Fuzi, and it will be of great interest to doctors and pharmacists.
A sol-gel process for YSZ membrane prepared with less expensive chemicals, ZrOCI2·8H20 and YC13, has been developed. The sol viscosity as a function of concentration, acidity and temperature was brane formation processes were also studied. investigated. And gelation and Based on an optimized procedure memhole and crack-free YSZ membranes with the pore size less than 100 nm have obtained on coarse porous a-alumina. 相似文献