硝酸

Cell activity were examined by trypan blue staining,morphological changes were examined by fluorescence microscope,and cell cycle were measured by flow cytometry.

研究了硝酸镧对鸡MD肿瘤细胞株MDCC-MSB1细胞形态及细胞周期的影响，进而探讨硝酸镧对MDCC-MSB1细胞的影响机制。

Low-molecular-weight EC was attained with ethylcellulose being degraded by 34% nitric acid; Fourier transform infrared spectroscopy, 13C-NMR,element analysis confirmed that the basic structure and major properties of low-molecular-weight EC maintained agreement with those of undegraded EC except that the polymerization degree of EC decreased.

乙基纤维素被 34%硝酸降解可以得到低分子量的乙基纤维素；FTIR，1 3C- NMR，元素分析，X-射线衍射分析证实在硝酸降解过程中，除了聚合度和结晶度降低之外，乙基纤维素的基本特性和基本结构没有变化；EC分子量的大小影响纳米微球的粒径大小、粒径分布和对药物的包覆效率。

The results showed that:(1) low N stress significantly decreased the leaf SPAD value, leaf nitrogen content, nitrate reductase activity and reduced distance between leaf-umbrella, leaf area. And these impact aggrandized as the stress intensity increased.(2) Responses to low-N stress were in different degrees between different varieties of rubber tree seedlings. On the whole, GT1 was most sensitive to stress, PR107 next, and RRIM600 was the least sensitive.(3) The SPAD value, DBL, LA were significantly positive correlated with LNC, NRA in the seedling leaves.

结果表明：（1）缺N胁迫明显降低了叶片SPAD值、叶片N含量和硝酸还原酶活性，缩小了叶蓬距、叶面积，且影响幅度随胁迫强度的加大而增大；（2）不同品种橡胶树实生苗对缺N胁迫的响应程度不同，总体上GT1较为敏感，PR107次之，RRIM600较不敏感；（3）橡胶树实生苗叶片SPAD值、叶蓬距、叶面积与叶片N含量、硝酸还原酶活性之间均呈显著或极显著正相关。

Basic copper carbonate with high purity was prepared from copper scraps via lixiviating with dilute nitric acid,reacting with sodium bicarbonate and poaching.

以废杂铜为原料，用稀硝酸浸出硝酸铜溶液，与碳酸氢钠反应得到碱式碳酸铜粗品，漂洗后得到高纯度碱式碳酸铜。

Yield of nitrated porphyrins vibrated fiercely with different concentrations of nitric acid. It was found that nitration with 80% nitric acid (w/w, d = 1.45) could afford over 90% yield of mono nitrated TPP.

不同浓度的硝酸对硝化产物收率有较大的影响，论文首次以80%的硝酸为硝化试剂，适当条件下获得了收率超过90%的单硝化产物。

In this paper, the latest progress of the nitration of deactivated aromatic compounds is reviewed in the point of view of nitrating agents, including nitrate-sulfuric acid, nitrate ester, nitric acid and nitrogen oxides.

本文从硝化试剂角度综述了近年来钝化芳环的硝化反应的进展，包括硝酸盐/硫酸、硝酸酯、硝酸、氮氧化物等硝化方法。

The results showed:Under the same fertilizer consumption,covered with straw and covered with film can increase the chlorophyll content and total leer area duration of the maize,can improve leaf nitrate reeducates activity,Photosynthesis and roots vigor,and the nitrate reeducates activity,the chlorophyll content and the roots vigor present positive correlation with yield. Meanwhile,average dry matter accumulation of straw-covered increased 7.1% than this of no-ploughed,yield increased 15.3%.The average dry matter accumulation of film-covered increased 20.1% than which of no-ploughed and 12.1% than which of plough and covered with straws.And yield increased 26.8% and 10.1%,notable differences.

结果表明：在相同的肥料用量条件下，秸秆覆盖和薄膜覆膜对玉米生长发育具有良好的促进作用，能显著增加玉米叶片叶绿素含量和光合势，增强叶片硝酸还原酶活性和根系活力，同时玉米叶片硝酸还原酶活性、叶绿素含量、根系活力等与最终籽粒产量呈正相关；秸秆覆盖比免耕全生育期平均单株干物质积累量增加7.1%，籽粒产量增加15.3%，薄膜覆膜分别比免耕和翻耕残茬覆盖全生育期平均单株干物质积累量增加20.1%和12.1%，最终籽粒产量增加26.8%和10.1%，差异显著。

Therefore, it is very important to make some research on the issue of management communication in order to improve the operational efficiency of large-scale construction projects. Adopting the method of case study, this article takes the LiaoYang Petrochemical Fiber Company's 116,600 ton/year dilute nitric acid 40,000 ton/year high density aqua fortis project as an example,...

文章采用案例描述的方法，对中国石油集团公司旗下的辽阳石油化纤公司11.6万吨/年稀硝酸4万吨/年浓硝酸项目中的P042.5水泥质量问题事件、氧化炉设备拖期事件和吸收塔吊装事件中存在的管理沟通问题进行了详细的描述，并分析了其中由于项目主体分工不明而导致的沟通不畅、利益分配不均等问题。

A harmonic of Nd:YAG laser(532 nm) pumped barium nitrate crystal in external resonator and excited stimulated Raman laser.Experimental setup adopted the Raman shifter consisted of external cavity and two prisms spectrometer.The external cavity was composed of diachronic mirrors with optimal reflectivity for Stokes components.

采用单端泵浦的外置拉曼振荡腔与双棱镜分光装置进行了硝酸钡晶体拉曼激光实验，泵浦源为倍频Nd： YAG的532 nm激光，硝酸钡晶体通过水溶液降温法生长，尺寸为10 mm×10 mm×48 mm，采用特殊镀膜的腔镜对各阶斯托克斯光进行优化选择。

A harmonic of Nd:YAG laser (532nm) pumped barium nitrate crystal in external resonator and excited stimulated Raman laser. Experimental setup adopted the Raman shifter consisted of external cavity and two prisms spectrometer. The external cavity was composed of diachronic mirrors with optimal reflectivity for Stokes components. Barium nitrate crystal was grown by the aqua-solution cooling method with the size of 48mm×10mm×10mm.

采用单端泵浦的外置拉曼振荡腔与双棱镜分光装置进行了硝酸钡晶体拉曼激光实验，泵浦源为倍频Nd：YAG的532nm激光，硝酸钡晶体通过水溶液降温法生长，尺寸为10mm×10mm×48mm，采用特殊镀膜的腔镜对各阶斯托克斯光进行优化选择。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。