查询词典 nitrogen

In this paper, in order to discuss the effect of high voltage electrostatic field on storage preservation of eggs, eggs were treated under high voltage electrostatic field at 30, 60 and 90 kV/m, respectively, and the pretreatment time was 30 and 60min, respectively. Then the eggs were stored at 13℃. Different preservation performance indexes like egg white Haugh unit, yolk index, total volatile basic nitrogen and sensory changes were determined regularly.

为探讨高压静电场对鸡蛋贮藏保鲜的影响，该试验利用30、60、90 kV/m不同高压静电场分别对鸡蛋进行30和60 min的预处理，然后置于13℃左右的室温条件下贮藏，定期测定鸡蛋的哈夫单位、蛋黄指数、挥发性盐基氮和感官性状的变化等指标，研究高压静电场对其贮藏保鲜效果的影响。

With American head lettuce as tested material, the rectangular hydroponic mode with gas-charged static nutrient solution was adopted, 6 different formula treatments including NO3(superscript -):NH4(superscript +)=80:20, 70:30, 60:40, 50:50; NO3(superscript -) replaced by CO (NH2) 2 as well as CK were set up and each formula was prepared by using groundwater directly to study the effects of different substitution amounts of nitrate nitrogen on growth status, root activity and chlorophyll content of lettuce.

方法］以美国结球生菜为试材，采用充气式静止营养液矩形水培方式，设定NO3：NH4=80：20，70：30，60：40，50：50；CO(NH2)2代替NO3以及对照共计6种不同的配方处理，各配方直接利用地下水进行配制，研究硝态氮不同替代量对生菜生长状况、根系活力和叶绿素含量的影响。

In this paper, based on the research home and abroad, the benefits of ecology, economy, society and their integration of contour hedgerow system of nitrogen-fixing plants in Ningnan County of Sichuan have been analyzed and assessed systematically with analytical hierarchy process.

本文在国内外已有研究基础上，采用层次分析法对四川省宁南县马桑坪的等高固氮植物篱种植模式的生态效益、经济效益、社会效益及综合效益进行了较为系统的分析和评价。

Nitrogen manuring is essential to get a good yield of cut herbage.

为了获得刈割牧草良好的产量，使用氮肥是极为重要的。

This is a new development after the discovery of the protonolysis of the C-Pd bond in the presence of halide ions and β-heteroatom elimination in presence of nitrogen-containing ligands in our group.

这是我们小组继发现卤离子效应下质子解淬灭C-Pd键，以及含氮配体下β-杂原子消除再生两价钯的研究后，又一新的进展。

Where necessary, nitrogen heteroatom substitution in a six-membered ring was modelled by alteration of the heat of formation by the same amount as benzene to pyridine conversion.

硫磺桥梁在phenanthro[4，5-bcd]thiophene 由转换塑造了从氧气桥梁在4H-cyclopentaphenanthrene 成硫磺桥梁使用区别在丁烷和dimethylthioether 之间。

With the electronegativity of heteroatom (such as sulfur, oxygen and nitrogen attaching directly to phosphorus) increasing, 31P NMR chemical shift moves to low field.

与磷相邻基团的电负性增加时，31P NMR化学位移向低场位移，如：杂原子硫、氧、氮，与磷直接相连将使磷谱向低场位移。

In this report, a series of nitrogen heterocycle porphyrin compounds were obtained by introducing a pyrazole heterocyclic ring with high fluorescent quantum yield to the parent porphyrin.

本文通过将具有较高荧光量子产率的吡唑杂环化合物连到卟啉环的中位而得到一类新型的含氮杂环卟啉。

The results show that this fiber contains multi\|functional groups, such as nitrogen, oxygen, heterocycle compounds and metal complexes, and has a better antibacterial activity, with good characteristics of broad spectrum, long lastingness and high efficiency.

结果表明：该纤维不仅含有多种含氮、含氧、杂环等官能团，且形成金属络合物，对不同菌类具备优异的杀菌活性，并具有抗菌谱广，作用时间持久和效率高等特点。

The effect of heterocycle in the molecules was similar to that of group -NH2, but the hydrogen on the nitrogen atoms could form the hydrogen bond between molecules which could effectively improve the thermal stability.

对于二维电荷转移体系，我们研究了氧桥Λ型分子，它含有两个D-π-A轴，属于典型的二维电荷转移体系，且它们的β_／β_＜1。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。