查询词典 nitric

The oxidation of mono-methylhydrazinewith nitrous acid in nitric acid medium was researched.

采用分光光度法研究硝酸介质中单甲基肼与亚硝酸(HNO_2)的反应。

At the same time, the enthalpy change of 212 kJ/mol for Tempo trapping methyl radical, namely O-〓 bond dissociation energy has been also obtained. This value is close to that of nitrous acid ester and far less than that of nitric acid ester. It is probably due to the relatively strong electron withdrawing capability of nitryl group.

同时我们还测得了甲基自由基与Tempo的反应的焓变，即O—〓键离解能为212 kJ／mol，它接近于亚硝酸甲酯中C—O键的离解能，而小于硝酸甲酯中的键离解能，这可能和硝酸根的吸电子能力较大有关。

After treatment of CCl4 through oral route for four weeks, we have observed an interesting phenomenon in the animal model. That is the significantly decreased condition of nitric oxide synthase. The locations are sympathetic T7-T10 dorsal root ganglion, T7-T10 intermediolateral cell column, celiac ganglion, parasympathetic nodose ganglion, solitary tract nucleus, and dorsal motor vagal nucleus.

结果显示：在餵食四氯化碳四周起，其交感神经回路上的T7-T10背根神经节、T7-T10脊髓侧角中间外侧细胞柱之交感节前神经元以及位於腹腔神经节的交感节后神经元所含之一氧化氮合成下降；而副交感神经回路上的小结神经节、孤立径核以及迷走神经背侧运动核所含之一氧化氮合成亦下降。

ABSTRACT Objective: To study the expression of inducible nitric oxide synthase in placenta and umbilical cord of normotensive and pre-eclamptic pregnancy.

摘 要 目的：研究诱生型一氧化氮合酶（inducible nitric oxide synthase， iNOS在正常足月妊娠和妊娠高血压综合征孕妇胎盘、脐带中的表达。

In 1953 the first tactical missile using a storable propellant (nitric acid and carbon-hydrogen fuel), the R-11, was created with a range of 270 km. The R-11's launch mass was 5.5 tons and the nose cone mass was 0.67 tons.

1953年，第一种使用可贮存推进剂的战术导弹R-11被研制出来，射程270千米。R-11的发射质量是5.5吨，可携带质量为0.67吨的弹头。

Nanoporous gold with different pore sizes was prepared by controlling the etching time of Au/Ag alloy with concentrated nitric acid and annealing. Scanning electron microscopy and a nitrogen adsorption technique were used to characterize the NPG.

以Au/Ag合金为原料，通过控制浓硝酸的腐蚀时间再辅以退火处理得到了不同孔径的纳米多孔金，利用扫描电镜和N2气体吸附仪对孔性质进行了表征。

For the inactivated immobilized laccase, its carrier NPG could be recycled by simply immersing it into concentrated nitric acid.

此外， 失活的固定化酶经浓硝酸处理后， NPG载体可重复利用。

Objective To study distribution and aged-related change of neuropeptide Y and nitric oxide synthase-positive neurons in occipital cortex of rats.

目的研究大鼠皮质枕叶神经肽Y和一氧化氮合酶(NOS1)阳性神经元的分布及其衰老变化。

Treatment of niobic acid with nitric acid and phosphoric acid affected the catalytic activity in synthesis of methyl oleate from oleic acid and the methyl alcohol.

研究了处理的铌酸对制备油酸甲酯催化反应活性的影响，并对此酯化反应合成条件进行了考察。

The acetylcholine,γ-aminobutyric acid and nitric oxide are major neurotransmitters for olfaction synaptic transmission in MB.

乙酰胆碱、γ-氨基丁酸和一氧化氮等是蘑菇体嗅觉突触传递的主要神经递质。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。