自由氮 的英文怎麼說
中文拼音 [zìyóudàn]
自由氮
英文
free nitrogen-
Initiation is caused by radicals produced from azobisisobutyronitrile, benzoyl peroxide or perester decomposition.
鏈引發是由偶氮二異丁腈，過氧化苯甲酰或過氧酯分解生成的自由基所引起。The understanding of biogeochemical cycle of hydrogen, oxygen, carbon, nitrogen, and sulfur elements in nature ecosystem have increased substantially in the past two decades owing to the improvement of gas isotope ratio mass spectrometer and the wide application of isotopic studies with these elements
摘要近20年由於氣相同位素比值質譜儀的改良和氫、氧、碳、氮和硫等穩定同位素的廣泛研究，穩定同位素的研究技術已實質增加我們對于這些元素在自然生態系中生地化循環的了解。By the crop residue input, priming effects of soil irjcrobe will take place, and decomposition and bio - fixation give rise to soil organic matter arid m in the up layer of soil. on the other hand, tillage accelerate ; ; the organic matter mineralization and leads to the quantity of organic matter decreasing in. or 10cm. layer which is about 1 / 2 of soil organic matter under no - tillage
覆蓋免耕使土壤上層的有機質和氮素穩定增加，這主要來自被激發的微生物繁殖時對碳和氮的生物固定，而傳統耕作則由於耕翻加速了有機物的礦化， 0 - 10cm土層微生物碳含量均一，其數值幾乎為免耕系統的一半。Furthermore, the growth and the study of self - organized quantum dots structures become more and more important recently, and the application of self - organization technique become wider and wider in this thesis, we address the theory of film growth and the growth technique firstly more, the ways and characteristics of surface detection are prescribed we mainly report the growth process, results and discuss of self - organized quantum dots structures in the a12o3 substrates by s - k mode using ecr - mocvd, in the espd - u device the growth art of ain epilayer which is the preliminary foundation of self - organized gan / ain quantum dots structures, including the substrate cleaning, nitridation, the growth of buffer and the growth of gan and ain epilayer, is discussed we deliberately compare the test result of rheed xrd and afm and achieved the optimalized condition of ain at last we have successfully realized the growth of ain which is much smooth and better crystal quality moreover, we grow the self - organized gan / ain quantum dots structure in s - k mode because the limits of the heater temperature, we can not grow the atom - smooth epilayer of ain until now so we could not grow better quantum dots which have small diameter and big density but the self - organized quantum dots structures with better quality will be realized successfully if the substrate temperature is increased the thesis study belong to my tutor subject of national nature science foundation ( 69976008 )
本論文主要論述了在espd - u裝置上，採用電子迴旋共振等離子體增強mocvd （ ecr - pamocvd ）方法，在藍寶石襯底上通過s - k模式自組裝生長gan aln量子點結構的生長工藝、結果及討論。而重點分析了自組裝生長量子點之前的aln外延層生長工藝，包括襯底清洗、氮化、緩沖層的生長和gan 、 aln外延層的生長；通過高能電子衍射、 x射線衍射和原子力顯微鏡測試，並且對這些測試結果進行了詳細的比較研究，得出了較優化的工藝條件，生長出了晶質較好、表面較平整的aln外延層；進而採用s - k模式自組裝生長了gan aln量子點結構。由於實驗裝置加熱爐溫度的限制，我們沒有能夠生長出原子級平滑的aln外延層表面，因而沒能夠生長出密度比較大和直徑比較小的量子點。Little is known about how to control anpsp due to lack of the related theory and practical experience. especially there is no satisfactory measure to reduce the runoff and leaching of n and p from agriculture into rivers and lakes. it ' s very significant in both theory and realism to reduce agricultural non - point source pollution and protect our ecological environment for realizing the harmonious development of resource, environment and agriculture in china
農業面源污染是困擾我國社會、經濟持續發展的一個嚴重的環境問題，主要是由於農業面源污染具有量大面廣、分散的特點，並受自然條件突發性、偶然性和隨機性的制約，現階段我們對農業面源污染情況的了解程度遠遠不如點源污染，還缺乏整治的相關理論基礎和實踐經驗，減少污染物尤其是氮、磷營養的排放具有相當大的難度，因此控制農業面源污染、保護和優化生態環境對實現我國資源、環境和農業協調發展有重要的理論和現實意義。Two liquid nitrogen cooling systems are available. the lnp94 / 2 can be automatically controlled by the temperature programmer or by selecting one of 5 manual pump speeds
可以使用兩套液氮冷卻系統。 lnp94 / 2可以自動地由溫度程序控制器控制，或選擇5種手動泵速。Ozone is formed from photochemical reaction between nitrogen oxides and volatile organic compounds, which are predominantly pollutants from motor vehicles and industries
臭氧是由主要是排放自車輛及工廠的氮氧化合物及揮發性有機化合物在光化學反應下形成的。分享友人