断裂

The analysis of Vp and Vs sectional data of earthquake distribution suggests that the earthquakes are often centralized in the intersectant zones of faults with velocity change zone and faultswith faults.

地震分布的Vp和Vs剖面资料的研究暗示，断裂与速度变化带、断裂与断裂的相交区域是地震易发生区域。

But, the characteristics of its adhered-elastic fracture in high temperature and brittle fracture in low temperature were discovered during impact load test The impact fracture mechanism of the high-energy nitroamine propellant had been put forward by studying the fracture appearances of impact fracture surface, the expansion of secondary crack and the weakness or failing of mechanical structure combined with the analysis of impact fracture properties and dynamic adhered-elastic properties and structures.

通过研究冲击断裂表界面的断口形貌、二次裂纹的发展、材料的力学结构缺陷或弱点，并结合冲击断裂性能、动态粘弹性能及结构分析，提出了硝胺发射药的冲击断裂破坏机理。

Since Watson and Crick have brought forward the model of DNA helix structure and explain about it's reproduce mechanism in molecule level, research work concerning DNA has been continuously lucubrated. However, whether translating inheritance information and rebuilding DNA molecule via menstruating DNA sequence, or to date the most compelling gene project, chromosome protract et. al, there all need a sort of molecule scissors cleaving DNA, DNA cleavage reagent. At present, tool enzyme of cleaving DNA is mostly DNA restriction enzymes founded in 70 years, which only cleave DNA at specific 4-8 base pair sequences that are usually palindromic, so this restricts the at very fast speed developing of gene technology at certain extent.

自从Watson和Crick提出DNA的双螺旋结构并对其复制机制在分子水平上进行解释后，使得对DNA的研究不断深入，但无论是通过测定DNA的序列来破译遗传信息、改造DNA分子，还是目前最令人关注的基因工程、染色体绘制等，都需要一种断裂DNA分子的&剪刀&——DNA断裂试剂，目前断裂DNA的工具酶主要是上个世纪70年代发现的DNA限制性内切酶，但所知的Ⅱ型限制性内切酶的DNA序列识别长度较短（约为4～8个碱基对），而且一般要求回文结构，这就给飞速发展的基因工程技术带来一定的限制。

Because of periodically faulting hydrocarbon pumping migration along fault zone is periodic, intermittent and pulsant, and hydrocarbon migration and accumulation often locates the newest strata.

断裂周期性破裂活动的特征决定了油气沿断裂的垂向泵吸运移呈周期性、间歇性和脉动的特点，同时也决定了油气易于在断裂错开的最新层位聚集成藏。

According to the above method and approach, research work is made on the following aspects:① recurrence behavior of continental strong earthquakes;② interaction of faults and coseismic Coulomb stress changes;③ the influence of coseismic Coulomb stress changes on seismic potential of active faults;④ triggering and delaying of earthquakes due to fault interaction of the Xianshuihe-Xiaojiang seismotectonic belt.

根据上述研究思路，本文主要开展了以下几方面的工作：①大陆板内地震复发行为研究；②断裂间相互作用与同震库仑应力改变研究；③同震库仑应力改变对活动断裂地震危险性的影响；④鲜水河-小江断裂带断裂间相互作用对地震的触发。通过研究，本论文得到了以下主要认识和结论

It is shown that the stress triaxiliaty T has great effect on the damage evolution. When T goes up, the ductile damage tends to be intensified. When the core is harder than the sleeve, the larger the semicone angle the core fracture is more likely to occur.

断裂预测结果表明，对于芯层金属较硬的双金属的挤压成形，锥形模半模角α越大，芯层金属越容易发生断裂，较大的摩擦因子有助于阻止芯层金属的断裂，这两点结论与Avitzur由上限法所得的结论完全一致。

The results show that after heat treatment, the tensile strength of the alloy increases by 49 MPa, the hardness increases from 21.6 HRC to 25 HRC, and the impact fracture toughness decreases; fracture characteristic is intercrystalline fracture in as-cast, it is intercrystalline and transcrystalline mixed fracture after heat treatment.

结果表明：热处理后合金的抗拉强度σ提高了49MPa，硬度由铸态时的21.6HRC提高到了25 HRC，但合金的冲击韧度出现了较明显的下降；铸态时合金的断裂主要呈沿晶断裂特征，热处理后合金断口里沿晶＋穿晶的混合型断裂特征。

The protection of AF－1 was observed with the measurement of transudatory rate of LDH ,the breaking rate of DNA and contents of LPO and SOD,Results:The intotoxincation of glutamate was decreased by AF－1 which reduced the transudatory rate of LDH,the breaking rate of DNA and the content of LPO,and increased the content of SOD in culture significantly.

通过测定乳酸脱氢酶漏出率、DNA断裂率、超氧化物歧化酶和脂质过氧化物，观察AF－1药物的保护作用。结果：高浓度的谷氨酸可增加培养神经细胞的LDH释放率和DNA断裂率，并诱导自由基产生。AF－1明显降低谷氨酸的神经细胞毒性，使LDH释放率及DNA断裂率明显降低，LPO含量明显下降，SOD含量明显升高。

Molybdophopsphoric Acid Catalysis in the Oxidative Cleavage of Olefins by the Hydrogen Peroxide Oxidative cleavage of the double bond could be catalyzed by H_3PMo_(12)O_(40) using H_2O_2 as oxidant, various trisubstituted olefins were oxidized to aldehydes or ketones in high yields. The system was not satisfied for electron-deficient olefins such as trans-(2-nitrovinyl) benzol or chalcone. The reaction of aliphatic olefins did not occur under the same conditions.

二、磷钼酸催化过氧化氢对烯烃的氧化断裂反应用过氧化氢(30％)作为氧化剂，磷钼酸可以催化氧化碳碳双键的断裂反应，三取代的烯烃被氧化生成醛或酮，产率较高；此体系对于缺电子烯烃如查尔酮，不饱和硝基化合物的断裂反应效果较差，脂肪族烯烃在此体系下的氧化并不发生。

The long axis of the high intensity isoseism of this earthquake is NE-trending, consistent with the Haiziyan Fault, which is therefore assumed to be the seismogenic fault of this earthquake.

五原6.0级地震高烈度区等震线长轴呈NE向，与海子堰断裂一致，是五原地震的发震构造。1996年包头西6.4级地震发生在由陡崖和沟槽地貌显示的NEE向乌拉山北缘断裂与NW向新生砂石厂断裂交会的部位。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。