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The dormant bud of apple variety Gala was smeared with potassium nitrate at 1%, 3%, 5%, 7% and 9%, and the dormant bud of grape variety Jufeng was smeared with calcium cyanamide diluted at 2,5 and 8 times (weight ratio of calcium cyanamide to water was 1:2). The effects of potassium nitrate and calcium cyanamide with different concn. on breaking natural dormancy of fruit tree were studied.

方法用浓度为1%、3%、5%、7%和9%的硝酸钾涂抹苹果品种嘎拉的休眠芽,用浓度为2倍液(石灰氮与水的重量比为1:2,下同)5、倍液和8倍液的石灰氮涂抹葡萄品种巨峰的休眠芽,研究不同浓度的硝酸钾、石灰氮打破果树自然休眠的效果。

The changes in phase structure and Curie temperature of the Sm2Fe17 compound after nitrogen absorption were studied by using X-ray diffraction, differential thermal/thermo-gravimetric analyzer and magnetic measurement. The results of X-ray diffraction showed that the diffraction peaks of the Sm2Fe17 compound shifted toward lower angle after nitrogen absorption, and the characteristic peaks of α-Fe were observed. This showed that the unit cell of Sm2Fe17 expanded, the compound was decomposed to a certain extent and the characteristic peaks of α-Fe appeared.

通过X-射线衍射、差热-热重联用仪以及磁测量等手段,研究了Sm2Fe17化合物吸氮后的相结构及居里温度的变化行为。X-射线衍射表明,吸氮后Sm2Fe17化合物的衍射峰向小角度方向偏移,并且出现了α-Fe的衍射峰,这说明吸氮后化合物的晶胞有所膨胀,并且化合物有一定的分解,产生了α-Fe。

The work done previously is experiential. To this day, the researches on silicon nitride thin film prepared by PECVD stay initial stages, so it is necessary to further develop PECVD. On the other hand, it is essential to prepare high quality silicon nitride thin film for gate insulator layer of TFT in order to get excellent TFT.

前人做的工作大多也都是经验性的,至今人们对PECVD 氮化硅薄膜的研究还很不成熟,尚处于研究探索的阶段,从而在理论上有必要对PECVD 法氮化硅薄膜做进一步的研究;与此同时,制备高质量的栅绝缘层用氮化硅薄膜也是制备高性能薄膜晶体管这一课题的需要。

For distinctly understanding the mutual influence between the structural units, a series of compounds from five and six-membered C-N heterocycle substituting the tetrazine ring are designed. These several types of compounds are studied by means of the quantum chemistry calcualtions and discussed the influence of the structural units upon the main performance (heat of formation, density, velocity and pressure of detonation) and found out the best combination of performance.

为了更清楚的了解结构单元之间的相互影响,设计了六元氮杂环和五元氮杂环取代1,2,4,5-四嗪得到了一系列化合物,采用量子化学计算方法对它们进行了详细的理论研究,讨论了各种氮杂环的改变对四嗪类化合物性能(包括生成热、密度以及爆速和爆压等)的影响,并找出爆轰性能较好的结构单元组合。

It is a stimulation method of oil field, using appropriative membrane separation device to separate nitrogen from the air.

它是利用专用的膜分离制氮注氮装置把空气中的氮气分离出来,针对稠油、稀油、气田等不同的油气藏特点,不同的开采方式采用不同的注氮工艺技术来达到油田增产的目的。

In this paper,many achievements of studying on the synthesis,thermal decomposition properties and characteristics of the energetic complexes based on high-energetic compounds containing many nitrogen atoms such as carbohydrazide and 5-nitro-2,4-dihydro-3H-1,2,4-triazol-3-one as well as tetrazole,etc.

概述了以高能多氮直链化合物如碳酰肼,富氮杂环化合物如三唑、四唑类为配体的配合物的合成、热行为以及性能的研究情况,同时简要地从分子或原子结构描述了一些其他多氮含能配体如肼、肼基甲酸甲酯等所形成的配合物的晶体结构以及热分解行为,并对含能配合物的发展方向进行了展望。

The use of benzazepin-N-acetic acid derivatives which contain an oxo group in the a position to the nitrogen atom and are substituted in the 3 position by a 1--cyclopentyl-carbonyl-amino radical, and of their salts and biolabile esters, for the prophylaxis and/or treatment of heart damage caused by cardiotoxic doses of medicaments or chemicals, in larger mammals and in particular humans.

本发明涉及苯并氮杂∴-N-乙酸衍生物及其盐和生物不稳定的酯的应用,其中苯并氮杂∴-N-乙酸衍生物在氮原子的α位置含有氧代基,且在3-位置上被1--环戊基-羰基-氨基残基取代,用于预防和/或治疗大的哺乳动物和特别是人体的心脏损伤,其中心脏损伤是由心脏中毒剂量的药物或化学品引起的。

The effect of N forms and Ratios on iron nutrition in hydroponically grown lettuce were investigated. It was found that suitable ratioNO3--N:NH4+-N:CO(NH22 =6:6:0 in nutrient solution can significantly promote plant growth, raise chlorophyll content, improve plant iron utilization efficiency, and reduces nitrate content accumulation in leaves, and the cost of nutrient solution was thus reduced.

硝态氮、氨态氮与酰胺态氮及其不同配比对水培油菜铁素营养的影响试验,结果表明,不同形态氮素显著影响植物的铁素营养状况,NO_3~--N:NH_4~--N:CO(NH_2)_2为6:6:0的处理比单一NO_3~--N使用处理,能促进水培油菜生长,提高叶绿素含量,增加植物体内铁的活性,降低叶片中硝酸盐含量的积累,降低营养液成本。

To obtain high cell density and high yield of MTG by Streptomyces hygroscopicus, the effects of exponential feeding of glucose and the addition of nitrogen source on MTG production were investigated.

在吸水链霉菌分批发酵研究的基础上,通过在菌体生长阶段指数流加葡萄糖,进行高细胞密度培养,获得了较高的菌体量;待菌体生长进入产酶期后,通过补加氮源,为产酶提供充足的氮源,其中通过流加蛋白质氮源,可以减少蛋白酶对成熟MTG的分解,促进产酶。

The Haber process provided a new supply of "fixed" nitrogen to make fertilizers that are now responsible for sustaining one-third of the world's population.

哈勃过程开始于氮元素的一种非固定状态(氮气,这种状态下的氮元素是不容易被利用的),或者其他形式的包含氮元素的气体如氮氧化物。

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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。

Chapter Three: Type classification of DE structure in Sino-Tibetan languages.

第三章汉藏语&的&字结构的类型划分。