硝酸

The result showed that the nitrate content could be decreased when adaptive fertilizer was applied with a feasible rate and well-timed.

人们从食用的蔬菜中摄入硝酸盐后，在体内还原酶的作用下可形成亚硝酸盐，然后与胺生成亚硝酸

The macro-kinetics characteristics of decomposition of witherite with nitric acid in a batch reactor are studied.

研究了在间歇反应器中，用硝酸分解毒重石宏观动力学特性。

Methods The concentrations of LOOH in the sera of 33 healthy subjects and 33 patients with CHD were determined by ferrous oxidation in xylenol orange assay, while those of NO by enzymatic one-step assay with nitrate reductase.

方法分别应用FOX法和硝酸还原酶一步法测定了33名正常人和33名冠心病患者的血清LOOH和NO含量。

Methods Ascorbic acid was determined by inhibition kinetic spectrophotometric method, which was based on the inhibition effect of ascorbic acid on the nitrite catalyzed oxidation of xylenol orange by potassium bromate in dilute sulfuric acid medium.

在稀硫酸介质中，利用抗坏血酸对亚硝酸根催化溴酸钾氧化二甲酚橙的阻抑作用，用阻抑动力学光度法测定抗坏血酸。

Zirconium 3-nitrophthalate Zr(3-NO2-PHT2·2H20 was synthesized using 3-nitrophthalic acid, sodium hydroxide, and zirconyl nitrate as raw materials.

用3一硝基邻苯二甲酸、氢氧化钠和硝酸氧锆为原料，制备了3。

The surface zirconyl species as centers of negative charge compensated by sodium ions presents a property of ion exchange. mesoporous silica ; ZrMCM-41; synthesis ; molecular sieves

在本文中，作者使用中性条件和硝酸氧锆作锆源，在水热体系中把Zr原子引入其固架，合成出了ZrMCM - 41 ，发现该样品与文献 [4]，[5]报道的不同，存在明显的B酸中心。1 实验部分1 。1 试剂硅源：Na2 Si3O7溶

Highly ordered mesoporous Zr-Ce-SBA-15 silica with hexagonal-platelet morphology was synthesized through a hydrothermal route by using pluronic P123 as a template, tetraethyl orthosilicate as a silica source, zirconyl chloride and cerous nitrate as a precursor. The main strategy of this method was to utilize the acidity self-generated from the hydrolysis of inorganic salts in the aqueous solutions, where no addition of mineral acids was necessary.

以P123为模板剂，正硅酸乙酯为硅源，氯化氧锆和硝酸亚铈为无机前驱盐，在不外加无机酸的条件下，利用无机前驱盐自身水解产生的弱酸性环境，通过水热合成路线一步合成了具有大的径轴比、短孔道、六方板状形貌的Zr-Ce-SBA-15介孔材料。

Normal human erythrocytes swelled, congregated and the acanthoid structures appeared on erythrocyte membrane when La〓 existed.

结果表明当红细胞与硝酸镧作用后其体积发生膨胀，表面出现棘状凸起，细胞间发生聚集。

Using Ce(superscript 4+) as initiator, St-AM was prepared by grafting acryl amide onto starch.

以硝酸铈铵为引发剂，通过接枝共聚反应，在淀粉骨架上引入丙烯酰胺，制得St-AM接枝物。

The best grafting conditions of bamboo fiber which grafted by acroleic acid and acryl amide in HNO_3 dilute solution system by planing.

用正交法探讨了竹纤维在HNO3稀溶液体系中以丙烯酸和丙烯酰胺单体接枝共聚反应的最佳条件，结果表明，当引发剂硝酸铈铵浓度为20mmol。

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。