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In this paper several technologies, such as Fourier transform infrared spectroscopy, elemental analyzer, wide angle X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and high resolution transmission electron microscopy were used to systemically investigate the evolution of crystal structure, chemical structure, microstructure and properties of wet-spinning and dry-jet wet-spinning PAN precursor fibers during proxidation and carbonization process, analysis the structural change of carbon fibers during graphitization, and discuss the correlation between the structure and properties.

本文采用傅里叶变换红外光谱、元素分析仪、X射线衍射仪、场发射扫描电镜、透射电镜以及高分辨透射电镜等测试技术，分别系统研究了湿纺原丝和干喷湿纺原丝在预氧化和碳化过程中纤维晶体结构、化学结构、微观结构和力学性能的演变规律，分析了碳纤维在石墨化过程中的结构转变，并对碳纤维结构与性能的相关性问题作了探讨。

In our results, we found four proteins have isoforms; these proteins are peptidyl-prolyl cis-trans isomerase A, prohibitin, enolase 1, myeloperoxidase precursor.

同时，我们发现肽基辅胺酸顺反异构酶（peptidyl-prolyl cis-trans isomerase A）、抑制素、烯醇酶（enolase 1）、过氧化骨髓酶有异构体的产生。

L-arginine, an NO precursor, reduced the contractile amplitude and end-diastolic cell length in the cardiomyocyte; but reversibly increased LVDP,±dp/dtmax, and coronary flow in isolated perfused rat heart.

2NO的前体L-精氨酸(L-arginine， L-Arg)引起心肌细胞舒张期细胞长度缩短、收缩幅度降低。离体灌流心脏LVDP、冠脉流量、和±dp/dtmax增高，用K-H液复灌后可恢复正常。

Arginine, a NO precursor, reduced the contractile amplitude and end diastolic cell length in the cardiomyocyte, but reversibly increased LVDP,眃P/dtmax and coronary flow in isolated perfused rat heart.

－Arp预处理，再行Fe－HQ（5卜mol／L）灌流，与单纯的LAfg或Fe－HQ组相比，心肌细胞舒张期细胞长度、收缩幅度和速度减小；离体灌流心脏LVDP、tdP／im.x、心率和冠脉流量明显下降，冠脉流出液中LDH、CK增加。

Under the optimum concentration of 1.5% glycerol in fermentation medium and feeding of 1% glycerol as precursor after 60 h of incubation, the titer of 2,668 μg/ml was obtained in shake flask culture, an increase of 7.4 times compared with the original strain.

以XC-5-48菌株为试验菌株，当培养基中甘油初始浓度为1.5%，并且在发酵60h时补加1.0%的甘油，摇瓶发酵的效价可达2668μg/ml，较出发菌株(318μg/ml)提高了7.4倍。

The result show there weren't M6.0 earthquakes beyond 4 years and M5.0 earthquakes beyond 2 year, the earthquake calmness is distinct in medium term; the M5.0 earthquakes intensified in short term, there were foreshocks in the epicenter region, in the same time, the fixed point precursor observational datum of Xinjiang appeared obvious short anomalies; and found a few imminent earthquak...

结果认为，6.8级地震前新疆6级地震平静4年多，5级地震平静2年，中期阶段地震平静显著；短期阶段5级地震显著增强，震源区出现前震活动，同时全疆定点前兆观测资料出现较为明显的短期异常并观测到少量的临震异常。不同孕震时段的异常特征是6.8级地震中短期预测的依据，因而也是当前经验预报的基础。

Compared with the MgO prepared by direct thermal decomposition of the MgO precursor, the novel high-specific-surface-area MgO material contains more strong basic sites and less acidic sites and exhibited higher acetone yield and selectivity in isopropanol decomposition, making it a potential solid base catalyst.

与直接焙烧四水乙酸镁制得的MgO相比，这类新型高比表面积MgO具有较多的强碱位和较少的酸性位，并在异丙醇催化分解反应中表现出更高的丙酮收率和选择性，有望成为一类优良的固体碱催化剂。

We always adhere to the science and technology as a precursor to die for nitrogen spring areas, provide the best quality products and the best pre-sales, sales, after-sales service.

我们始终坚持以科技为先导，致力于模具专用氮气弹簧领域为客户提供最优质的产品和最佳的售前、售中、售后服务。

A New type of benzoxzine precursors was systhesized based on methoxy methylene diphenyl ether oligomer.The struture of product was characterized by IR and H-NMR analysis and effects of solvent polarity,temperature on the precursor composition were investigated.

以甲氧基次甲基二苯醚低聚物为基础合成了苯并口恶嗪预聚物，用H－NMR、IR表征了该预聚物的结构，讨论了反应温度、溶剂的极性等因素对合成预聚物的结构和组成的影响。

For example, neutraceuticals do not contain the direct-acting molecules that are PSGAGs, but rather may contain a precursor to the active form of the drug.

另一项可以单独使用或与诊断成像相结合的方法是在实验室收集和关节液分析，从影响肢体。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。