查询词典 nitric acid

Equation of regression of its standard curve is: Y=0.02909x+0.03984, correlation coefficient is 0.9999. 4 kinds of sample detect result, in binding hoof, puke, banger, cantaloup inferior nitric acid content is respectively 0.015, 0.362, 0.011 with 12.54 G/kg.

其标准曲线回归方程为：y=0.02909x+0.03984，相关系数为0.9999.4种样品检测结果，捆蹄、呕吐物、香肠、香瓜中亚硝酸含量分别为0.015、0.362、0.011和12.54 g/kg。

When nitric acid is poured on copper,a brown vapor gives off.

将硝酸倒在铜上，会散发出一种棕色的蒸气。

Methods: 2ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2ethyl5nitro aniline. The product was then synthesized to 3methyl6nitro1Hindazole by using ringclosing reaction in the presence of NaNO2, and then ethylated to obtain 2,3diethyl6 nitro2Hindazole. The latter compound was then reduced by SnCl2/Hcl to get target compound 2,3diethyl6nitro2Hindazole.

以2乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2乙基5硝基苯胺，后用亚硝酸钠关环得3甲基6硝基1H吲唑，经硫酸二甲酯甲基化得2，3二甲基6硝基2H吲唑，最后用氯化亚锡将其还原得到目标产物，通过1H NMR确定结构与目标产物一致。

Methods: 2-ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2-ethyl-5-nitro aniline. The product was then synthesized to 3-methyl-6-nitro-lH-indazole by using ring-closing reaction in the presence of NaNO2, and then ethylated to obtain 2, 3-diethyl-6- nitro-2H-indazole. The latter compound was then reduced by SnC12/Hcl to get target compound 2, 3-diethyl-6-nitro-2H-indazole.

以2-乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2-乙基－5-硝基苯胺，后用亚硝酸钠关环得3-甲基－6-硝基－1H-吲唑，经硫酸二甲酯甲基化得2，3-二甲基－6-硝基－2H-吲唑，最后用氯化亚锡将其还原得到目标产物，通过1HNMR确定结构与目标产物一致。

The green body's bending strength was 3.916MPa after jelling and drying under special temperature and time using nitric acid as a curing agent.

以硝酸为固化剂在一定的温度及时间内胶凝固化并干燥，可以得到抗弯强度为3.916MPa的生坯。

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。

With excessive nitric acid of different concentrations as the nitrating agent, regiospecific of meso-tetraphenylporphyrin were investigated in detail.

以不同浓度的硝酸为硝化试剂，详细考察了多种因素对meso-四苯基卟啉苯环上para位硝化反应的影响。

Pseudo-boehmite was prepared with nitric acid and sodium aluminate under the same precipitation conditions but different ageing and washing conditions. The influences of ageing temperature, ageing time and ageing media were studied. It was shown that pronging the ageing time and increasing temperature lead to improve crystallinity of PB., the pore diameter of PB can be increased after NH4HCO3 is added in the ageing medium.

在相同成胶条件下利用铝酸钠溶液和硝酸制备拟薄水铝石，而在不同条件下进行老化，研究了老化温度、老化时间及老化介质的影响，结果表明延长老化时间、提高老化温度和老化pH值有助于结晶度的提高，使用NH4HCO3等具有扩孔作用的溶液作为老化介质会降低产品的堆密度和增加孔径、孔容、比表面积。

On the basis of powder contact angle measurement,the surface free energy of active carbon and acetylene black before and after oxidized by nitric acid or reduced by hydrazine was estimated by means of Wu formula.

在粉末接触角测试的基础上，用Wu方程估算了硝酸氧化或肼还原前后，活性炭和乙炔黑的表面自由能。

A salt or ester of nitric acid .

马来酸的一种盐或酯。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。