氮的

This paper presents the results from field experiment concerning the effects of nitrogen,phosphate and potash fertilizers on the quality of summer millet grain in flovo-aguic soil, cinnamon soil and brown earth.

通过田问试验研究潮土、褐土和棕壤等不同土类的土壤施用氮磷钾化肥对夏谷米粒品质的影响。结果表明，氮肥、氮磷配合、氮磷钾配合施用均可明显提高夏谷米粒中氨基酸的总量及人体必需氨基酸的总量，差异极显著。

To improve the nonlinear optical property and stability of azo-dye chromophore, the nonlinear optical polyimide attached with azo chromophore side-chain is synthesized by diazo coupling reaction of 4-nitrohenzediazonium tetrafloroborate.

为了提高材料的非线性光学性能和偶氮染料发色团的稳定性能，通过对－稍基苯基重氮氟硼酸盐的重氮偶合反应，合成了侧链含偶氮非线性光学活性基团的聚酰亚胺材料，幷用红外光谱对其进行了结构表徵。

Cinnamomea, antrocamphin A was purified from previous ethanol extraction using bioactivity-guided fractionation. As results, the antrocamphin A could significantly inhibit NO and PGE2 autacoids production in LPS-induced RAW 264.7 macrophage cells. Meanwhile, the mRNA and protein expression levels of iNOS and COX-2 were inhibited by antrocamphin A in a dose-dependent manner. Antrocamphin A also reduced the translocation of NF-κB induced by LPS, which was associated with the prevention of the degradation of I-κB, and subsequently decreased p65/p50 proteins level in the nucleus. This is the first report demostrating the A.

接著并以活性为导向的分离策略，从樟芝子实体乙醇抽出物中分离出具抗发炎活性成分antrocamphin A，续利用LPS诱导小鼠巨噬细胞（RAW 264.7）产生发炎的模式，解析antrocamphin A之抗发炎机制，结果证实antrocamphin A确可有效抑制一氧化氮自由基和前列腺素的生成，透过蛋白质表现分析得知，antrocamphin A之抗发炎活性是经由抑制一氧化氮生成酵素和第二型环氧酵素的mRNA表现，进而抑制了一氧化氮生成酵素、第二型环氧酵素和核转录因子-κB等酵素之表现。

Aryl azides are by far the most frequently used photoaffinity probes because they can be easily synthesized, as well as being chemically stable in the dark and highly reactive upon photoirradiation.

与普通的芳基叠氮基团相比，全氟取代的芳基叠氮基团具有更高的光标记效率；而香豆素的叠氮衍生物则同时具有荧光标记能力和光亲合标记能力，具有更广泛的应用潜力。

Under these conditions several aryl iodides bearing awide range of functional groups were converted into the corresponding aryl azides in good yields.

在重新优化后的条件下，大部分不活泼芳基溴化物可以与叠氮化钠发生交叉偶联反应得到良好收率的芳基叠氮化储蓄型投资银条合物，但是有拉电子基团取代的芳基溴化物与叠氮化钠的偶联反应则难以进行。

The results showed that, NO-3-N contents and nitrate reductase activity had obvious diversity in different spinach varieties and different organs of the same plant. The NO-3-N contents in stem were the highest, followed by petioles, then mesophylls, and were the lowest in roots. When the ratio of root to shoot was higher, the NO-3-N contents in plants were lower. NR activity was higher in root especially in lateral root. The NO-3-N contents in mesophyll and petiole were negative correlated with the in vitro -NR activity and in vivo -NR activity in roots.

硝态氮含量以短缩茎中最高，叶和叶柄中次之，根中最低，且根/冠比越大的品种，其整体植株中的硝态氮含量越低；根尤其是侧根NR活性较高；叶肉和叶柄中硝态氮含量均与根中以内、外源硝酸盐为底物的NR活性呈一定的负相关。

X-ray diffraction. The microstructure and cross section microhardness of nitrided layers were observed and analyzed by optical microscope and microhardness tester.

在一定的工件表面温度下，粒子表面物理吸附的氮原子发生脱附，脱附下来的活性氮原子渗入基体的内部，形成渗氮层。

Based on the Minqin oasis Daejeon cotton irrigation district, systems research and analysis of cotton under different irrigation water and nitrogen coupling effect, the main conclusions of the pilot study are as follows:(1) The coupling effect of water and nitrogen under different furrow irrigation patterns shows that water and nitrogen application rate increased in the three furrow irrigation patterns will help improve cotton yield, but FFI limit the effects of water and nitrogen play, AFI and CFI not significant differences in the effects of cotton yield.

试验研究取得主要结论如下：(1)不同沟灌方式棉花的水氮耦合效应研究表明，棉花产量效应表明，三种沟灌方式增加施氮量和灌水量均有利于棉花产量的提高，但FFI限制了水氮效应的发挥，AFI与CFI的棉花产量效应差异不显著。

Relay-planted with the same spring-sown maize, the quantity of nitrogen absorption of late maturity summer-sown maize was highest, but their nitrogen use efficiency was lowest, which because most the nitrogen absorbed were left in organs except grain.

与同一春玉米品种套作时，夏玉米为晚熟品种的吸氮量均较高，但其氮利用效率却较低，所吸收的氮更多的滞留在籽粒以外的植株器官中，向籽粒中转移的较少。

The methods of improving t he high-temperature-properties and fracture toughness of silicon nitride ceram ics,as well as its research and development prospect are also discussed in this paper.

本文着重介绍了氮化硅陶瓷的制备工艺、提高氮化硅陶瓷高温性能的方法以及改善其断裂韧性的途径，并展望了氮化硅陶瓷的研究前景。

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。