Trans-scale study on the thermal response and initiation of ternary fluoropolymer-matrix reactive materials under shock loading

To investigate the thermal response and initiation behavior of ternary fluoropolymer-matrix PTFE/Al/W reactive materials,a research combining shock loading tests and trans-scale modelling is conducted.On the basis of a good agreement of the numerically simulated and tested shock wave propagation,the significant impact of component ratios and particle sizes on the evolution of mesoscopic temperature,hot-spots and initiation is well characterized and analyzed.Results demonstrate that as the content of W increases,the range of mesoscopic high-temperature area increases and tends to distribute more uniform,while material with smaller W particles causes more intense particle deformation and larger temperature rise.The time to reach the critical temperature shows positive correlation to the content of W,while the critical temperature of hot-spots shows negative correlation to the particle size of W.For PTFE/Al/W of high density,with the increase of W particle size,the reaction rate decrease,however the time to reach the peak reaction rate shortens.

Hydrogen production via steam reforming of bio-oil model compounds over supported nickel catalysts

The steam reforming of four bio-oil model compounds（acetic acid,ethanol,acetone and phenol） was investigated over Ni-based catalysts supported on Al2O3 modified by Mg,Ce or Co in this paper.The activation process can improve the catalytic activity with the change of high-valence Ni（Ni2O3,NiO） to low-valence Ni（Ni,NiO）.Among these catalysts after activation,the Ce-Ni/Co catalyst showed the best catalytic activity for the steam reforming of all the four model compounds.After long-term experiment at 700°C and the S/C ratio of 9,the Ce-Ni/Co catalyst still maintained excellent stability for the steam reforming of the simulated bio-oil（mixed by the four compounds with the equal masses）.With CaO calcinated from calcium acetate as CO2 sorbent,the catalytic steam reforming experiment combined with continuous in situ CO2 adsorption was performed.With the comparison of the case without the adding of CO2 sorbent,the hydrogen concentration was dramatically improved from 74.8% to 92.3%,with the CO2 concentration obviously decreased from 19.90% to 1.88%.

Duplication and expression analysis of multicopy miRNA gene family members in Arabidopsis and rice

理解扩大多拷贝 microRNA (miRNA ) 在植物的家庭，我们局部性从到他们的染色体的 Arabidopsis 和米饭的报导 miRNA 基因，分别地并且从 Arabidopsis 观察了 117 miRNA 基因中的那 37% 个，从米饭的 173 miRNA 基因中的 35% 个是在染色体的部分复制。为了描绘表示多样化是否多发生在植物之中，拷贝 miRNA 家庭成员，我们设计了在 Arabidopsis 和米饭从 10 个家庭指向 48 位预言的 miRNA 先锋的 PCR 教材。从 RT-PCR 数据的结果建议在一样的 miRNA 家庭以内的成员的抄录先锋在不同表示层次是在场的。另外，尽管 miR160 和 miR162 序列在 Arabidopsis 和米饭被保存，我们发现这些基因的表示模式在二种之间不同。这些数据建议那表达式多样化发生了在多拷贝 miRNA 家庭，在植物增加我们 miRNAs 的表达式规定的理解。