The evolution of stress and earthquake rupture risk area along Zhongwei active fault after strong earthquake under the present tectonic stress field were obtained by viscoelastic finite-element simulation using rock rupture risk coefficient KR and fault gliding risk coefficient KF as criteria.
The result shows that the stress adjustment is mainly occurred in about 300~400 years after the strong earthquake and the earthquake rupture risk area will move to the west-middle part of fault,which will shift to east and concentrate gradually and change to the arc apex of the fault eventually.
A new turn of group strong earthquakes maybe occur possibly around 2007~2009.The danger zone of the main body is possibly the middle part of Tianshan earthquake belt and the eastern of Sichuan and Yunnan.
The status and effect of the earthquake prediction in one year scale on the emphatic danger zone in Gansu province from 1976 have been analysed. The concerned questions have been discussed. It can be concluded: (1) The corresponding percentage of 19.4 percent indicates the real states of the earthquake prediction in one year scale in Gansu.
The result show that the dynamic evolution characteristics of abnormality of middle-term background majoring in compression and middle short-term premonitory (one year scale high value region whose absolute value is more than 2 0) can be taken as the criterion of the middle and short-term strong earthquake danger area for above area.
All results were expressed in pmol/ml using radioimmunoassay and the infarcted to risk area in percent using fluorescent particles and tetrazolium chloride (TTC).
Administration of a δ-opioid receptor agonist, d-Ala2-d-Leu5-enkephalin (DADLE, 1?mg/kg), before ischemia increased the phospho-ERK levels during ischemia and reduced infarct size (as percentage of risk area, %IS/AR) from 47.7?±?2.3% to 23.2?±?2.5%.
At the end of the experiment, the infarcted myocardium was assessed using a tetrazolium stain (NBT) and related to the risk region which was determined with a fluorescent dye.
At the end of the experiments, the infarcted myocardium of four tissue slices was determined with a tetrazolium stain and related to the risk region which was delineated by a fluorescent dye.
Previously, we observed that reducing myocardial temperature in the risk region before coronary artery occlusion caused a profound reduction in infarct size.
The results indicate that the surface sink area of study area in Zhaoyuan City, has already come to 0.78km2 and it is forecasted that 0.97km2 of the exploration vacancy belongs to high danger area.