硝酸

The quantity of nitrous acid is proportional to the power of light and concentration of uranyl nitrate and decreases with the increase of concentration of nitric acid at higher acidity.

亚硝酸的生成量与光照功率和U的浓度成正比，当酸度大于0.1mol/l时，其量随酸度增加而减少。

A method of preparation of low molecular weight heparin from crude hog mucosal heparin by depolymerization with nitrous acid was studied.

介绍以猪肠粘膜肝素粗品为原料，采用亚硝酸控制解聚法制备分子量在4000～8000D的低分子量肝素。

In this paper, in situ measurement of nitrous acid and retrieval of aerosol parameters in a fixed wavelength range (307 nm—380 nm) were performed with DOAS system developed by our laboratory.

利用差分光学吸收光谱仪进行亚硝酸气体的测量并同时在固定的波长范围内(307—380nm)反演气溶胶参数包括气溶胶的平均直径、总个数和总比表面积等。

In addition, Prescription for flourishing stomach could relieve the inflammatory reaction induced by NO, and prevent the gastric mucosa from damaging by oxidative nitrous acid, benefiting for preventing canceration.

欣胃方有降低NO的作用，可减少NO诱发的炎症反应，阻断过氧化亚硝酸对粘膜的进一步损害，对预防癌变有积极的作用。

Emits the nitrogen with the nitrous acid function.

与亚硝酸作用放出氮气。

The results were as follows: The mutation rate could be increased effectively by the three treatments; the cooperation effect was better when TMV was treated by nitrous acid and heating.

采用高温、亚硝酸及两者的复合处理对烟草花叶病毒强毒株进行诱变，均可有效提高突变频率，而且复合处理还有较好的协同效应。

METHODS: Heparin with an aldehyde group as reducing end was prepared by nitrous acid degradation method.

将肝素钠用亚硝酸降解法降解，得到还原末端为醛基的肝素，分别溶解于二甲亚砜、含0.05 mL，0.5 mL冰醋酸的二甲亚砜溶液，再与对巯基苯胺发生还原胺化反应，用氰基硼氢化钠作还原剂，得到带巯基的肝素衍生物。

The Molar conductivity indicates that all the complexes are nonelectrolyte. IR spectra show the ligand is bonded with RE ion through its oxygen atom in hydroxyl group of phenol; NO3 is coordinated as a symmetrical chelating bidentate group; the coordinated atoms of DMF and DMSO are the oxygen atoms in carbonyl and sulfoxyl groups. Fluorescence spectrum suggests that the Tb3+complexes have characteristic luminescence and its fluorescence intensity is enhanced after doping with La3+, Gd3+, Y3+, influence of doping ions and neutral ligands have also been discussed.

摩尔电导率表明，所有配合物均为非电解质；红外光谱及核磁共振氢谱表明，对叔丁基杯[8]芳烃通过酚羟基的氧原子与稀土离子配位；硝酸根为双齿螯合配位；DMF和DMSO则分别通过羰基氧和亚砜基氧与稀土离子配位；配合物的荧光光谱表明，所有Tb的配合物具有较强的特征荧光，掺杂La~(3+)、Gd~(3+)、Y~(3+)离子对Tb~(3+)的荧光有较强的增强作用。

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。

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。