查询词典 nitrate

Through modifying proportions of potassium nitrate, sulfur, phenolophthalein and potassium hydrate, formula of charcoal-free black powder is optimized by replacing charcoal with reactant of phenolphthalein and potassium hydrate.

以酚酞和氢氧化钾的反应物替代木炭，通过调整硝酸钾、硫磺、酚酞及氢氧化钾的混合比例对无木炭黑火药配方进行优化设计，对比研究了普通黑火药与无木炭黑火药在机械感度、静电火花感度、热分解过程及输出特性等方面的差异。

The invention relates to a preparation method of epsilon-MnO2 layered structure nano-sphere comprising the following steps: adding potassium persulphate, manganese sulphate, ferric nitrate and concentrated sulfuric acid into hydrothermal reactor, charging deionized water and fully stirring, natural cooling the mixture to room temperature after hydrothermal reaction for 1-24 hours at 110-200 DEG C, washing and drying the product to obtain hexagonal crystal epsilon-MnO2 layered structure nano-sphere with a stable structure and uniform grain size.

一种ε-MnO 2 层状结构纳米球的制备方法，将过硫酸钾，硫酸锰，硝酸铁，浓硫酸加入水热反应釜中，加入去离子水充分搅拌后，在110-200℃水热反应1～24h后自然冷却至室温。得到的产物经洗涤干燥即得到结构稳定，粒径均匀的六方晶型的ε-MnO 2 层状结构纳米球。

Nitrate reductase activity in leaf blades was 27 and 9 times higher than that in petioles and roots, respectively.

结果表明，适当增铵使叶片、叶柄和根系硝酸盐含量分别降低了22％、15％和22％，而硝态氮吸收量则降低了7.5％。

Northern blotting analysis indicated that 5 genes, nitrate transporter gene, nitrite reductase gene, ammonium transporter gene, ATP-binding cassette transporter gene, and purine permease gene, were significantly up-regulated under nitrogen starvation.

Northern blotting验证其中5个基因，包括硝酸盐转运蛋白基因、铁氧化还原蛋白亚硝酸还原酶基因、铵盐转运蛋白基因、结合ATP盒的转运蛋白基因和嘌呤透过酶基因，在缺氮诱导条件下转录水平有明显上调。

Ceric ammonuim nitrate and sodium bromate series oxidation system was used selectively to oxidize oximes into the corresponding aldehydes and ketones in water.

在水溶液中，用硝酸铈铵溴酸钠串联氧化体系对肟进行选择性氧化生成相应的醛

Metallic-compound oxidizers, such as potassium nitrate or potassium perchlorate, generate condensed-phase products of particularly high molecular weight, which is rather undesirable.

金属复合氧化剂，如硝酸钾或高氯酸钾，产生凝聚相的产品，尤其是高相对分子质量，这是相当不可取的。

Oxidizers based on ammonium nitrate arechiefly characterized by its low signature.

汉语名词或副词转译成动词例5 硝酸铵基氧化剂的主要特点是它的信号特征低。

Anodic oxidations may be carried out with alkaline solutions of nitrate s, perchlorates, fluoroborates, or fluorosilicates.

在硝酸盐、高氯酸盐、氟代硼酸盐或氟代硅酸盐的碱性溶液中通过阳极氧化作用可制备PbO2。

It is instantly oxidated into nitrite and nitrate that are stable end products in vivo, and also destroyed by superoxide anion.

NO在体内很快被氧化成硝酸盐〓和亚硝酸盐〓，同时亦被超氧阴离子破坏〓，〓和〓是体内NO最终的稳定产物。

Table 2 Effects of nitrate/ammonium ratio in solution culture on the accumulation of oxalates of different forms in leaves

表2 硝态氮/铵态氮比例对叶片、叶柄和地上部不同形态草酸累积量的影响 mg/ plant， FW

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。