Crack Patterns in Ceramic Plates after Quenching

The crack patterns generated in a real ceramic plate and in a plate stacked by ceramic slabs under quenching are experimentally studied. The results here reveal that there are some distinct differences between the two crack patterns. The reasons that caused the differences are the size and boundary effects of the slabs. These crack patterns are very useful to understand the failure mechanisms of ceramic materials in thermal shock.

What triggers the transition of palaeoenvironmental patterns in China；the Tibetan Plateau uplift or the Paratethys Sea retreat?

IEECAS SKLLQG

葡萄卷叶病毒RT-PCR检测技术

为调查葡萄植株携带葡萄卷叶病毒(GLRaV)的情况,以带毒和非带毒指示植物“品丽珠”为试验材料提取总RNA,并以此总RNA为模板进行RT-PCR扩增,建立了GLRaV的RT-PCR检测体系,并对GLRaV cDNA序列进行测定,结果成功地检测到了GLRaV。经多次试验证明,该检测结果准确可靠,可以用于GLRaV的检测。