硝酸

After refluxed in nitric acid for 24 hours, oxidized CNTs can be obtained.

然后在浓硝酸中回流除去碳杂质，达到了有效纯化纳米碳管的目的。

Blue light could increase NRactivity,respirative rate,decreased the net photosyntheticrate,increased the contents of total nitrogen,protein,aminoacid,making the N metabolism stronger.

蓝光可以提高硝酸还原酶活性和呼吸速率，降低净光合速率，提高使叶片总氮、蛋白质、氨基酸含量提高，使氮代谢增强，C/N降低。

The invention is characterized in that absorbing agent is a multivariate compound salt which is formed by lithium nitrate, sodium thiocyanate and lithium rhodanate.

多元复合盐/氨溶液吸收制冷剂，它包括吸收剂和制冷剂，所述制冷剂为氨，其特征在于所述吸收剂为硝酸锂、硫氰酸钠和硫氰酸锂组成的多元复合盐。

Black-yonggu dahongyu reaumuria 2b pigments(ⅲ, pgment index number: p.R.48: 2, purple-red powder, insoluble in water and ethanol, in case of concentrated sulphuric acid radiofrequent purple-red, red is blue, in case of concentrated nitric acid, radiofrequent Rufous red concentrated sodium hydroxide, thermotolerance.

永固红2B颜料，颜料索引号：p.R.48：2，紫红色粉末，不溶于水和乙醇，遇浓硫酸呈紫红色，稀释后呈蓝光红色沉淀，遇浓硝酸呈棕红色，遇浓氢氧化钠呈红色，耐热性好。

Methods Samarium nitrate was administrated to mice at different doses (0,5,50,500,2000mg/L) for 90d.The contents of samarium and trace elements in testicle were observed.

110只雄性ICR分为5组，小鼠分别自由饮用0，5，50，500和2 000mg/L的硝酸钐水溶液90d，测定睾丸内钐和微量元素含量的变化。

A modified semicoke desulfurizer for FCC gasoline was prepared by hydrothermal and nitric acid activation and dipping with activate component using Zhalainuoer semicoke as raw material.

以扎赉诺尔半焦为原料，采用硝酸活化、水热活化和浸渍活性组分等改性方法，制备了改性半焦脱硫剂，并用于脱除FCC汽油中的各种硫化物。

A series of SiW_(12)/AC catalysts with different silicotungstic acid loadings supported on acti- vated carbon which was treated with 10% HNO_3 solution were prepared by an impregnation method and the catalytic performance of SiW_(12)/AC for the synthesis of trioxane were investigated.

以10%硝酸溶液处理过的活性炭为载体，采用不同质量分数的硅钨酸SiW_(12溶液为浸渍液，制备了不同负载量的SiW_(12)/AC催化剂，考察了催化剂在合成三聚甲醛中的催化性能，并用XRD、FT-IR、NH_3- TPD、BET、TG-DSC等手段对SiW_(12)/AC催化剂晶粒大小、催化剂表面的酸量及酸强度、比表面积及热稳定性等微观特性进行了表征。

The results show high selectivity when the temperature is controlled at 50 CC , and the nitrated reaction time is 90 mm, toluene is nitrated by using 95% nitric acid as nitrating reagent at the presence of acetic anhydride, 1.0g silicotungstic acid catalyst is calcinated at 300℃ for 1.5h. The o/p (ratio of ortho to paro isomer of toluene nitration) ratio is 0.89 in product distribution of toluene nitration, lower than 1.67 using sulfonitric acid as catalyst. The yield of products is 91.6%.

结果表明，在醋酐存在条件下，以CCl4为溶剂，以质量分数为95%的硝酸为硝化剂，反应温度控制在50℃，反应60 min， 1.0g经300℃焙烧1.5h后的硅钨酸催化剂，对甲苯表现出强的区城选择性，甲苯硝化产物o/p值（甲苯硝化产物邻位和对位异构体的质量比）达0.89，较硝硫混酸的1.67显著降低，产物收率达到91.6%。

The effects of different use levels of nitric acid and hydrogen peroxide were studied. The slaking time and the mutual interference of those metal ions were investigated.

考察了硝酸、过氧化氢的不同用量以及消化时间长短的影响和在同一体系中铜、锌、铁、锰的彼此干扰情况。

Relationship between NO3--N Accumulation and Nitrate Reductase Activity in Mesophyll and Petiole of Different Spinach Spinacia oleacea L.

不同品种菠菜叶肉及叶柄中硝态氮累积与硝酸还原酶活性的关系植物生理学通讯第42卷第2期，2006年4月，217-220

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。