Monte Carlo simulation methods for the study of electron beam interaction with solids have been mostly concerned with specimens of simple geometry. In this article, we propose a simulation algorithm for treating arbitrary complex structures in a real sample. The method is based on a finite element triangular mesh modeling of sample geometry and a space subdivision for accelerating simulation. Simulation of secondary electron image in scanning electron microscopy has been performed for gold particles on a carbon substrate. Comparison of the simulation result with an experiment image confirms that this method is effective to model complex morphology of a real sample.
Flexible hydrogen sensors based on palladium (Pd) and titanium dioxide (TiO2) nanofilm on poly(dimethylsiloxane) (PDMS) substrate have been demonstrated. We have prepared PDMS using anodic aluminum oxide template and researched the performance of Pd/TiO2 nanofilm based hydrogen sensors with different thickness of TiO2. The sensor with 6nm thickness of TiO2 has demonstrated the best performance with a response/recovery time of 1.6 s/6 s at 0.2% hydrogen concentration, respectively.
To observe the effect of Jiangzhi tablet on liver homogenate of hyperlipidemia model rats, seventy-two rats were randomly divided into 6 groups: blank control group, model group, Xuezhikang group and Jiangzhi tablet group. Except for the blank group, the rats were fed with high fat diet and the compound factors of intragastrically fat milk to establish hyperlipidemia model. The corresponding drugs were given intragastrically for 21 days in each administration group, and the eyeballs were removed 2 hours after administration on the 21st day, and the whole blood viscosity was measured. The rats were killed, the liver was taken, and the content of TC,TG in liver homogenate was measured. Hyperlipemia model rats were successful in the replication. Compared with the model group, the levels of TC and TG of the liver homogenate (P <0.01) could be significantly reduced in the high, middle and low dose lipid-lowering tablet groups. Jiangzhi tablet can significantly reduce blood lipid and regulate lipid metabolism in rats with hyperlipidemia.
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