查询词典 nitrogen-free

The effect of levels and forms of nitrogen applied on starch content, activity of SPS and diastase in tobacco leaves were also analyzed.

烟株生长进入成熟期后，叶片开始快速积累淀粉，接近成熟时达到最高；中部叶片淀粉含量HD为 4 0 %左右、K 32 6为 2 5 %左右。

Nitrogen ; Flue\|cured tobacco ; Starch ; SPS ; Diastase

氮； 烤烟；淀粉； SPS ；淀粉酶

A series of diazonium salts of 4-(N-methyl-N-phenylamino)-3-amino-1,8-naphthalic anhydride 5a, its naphthalimide derivative 5b, and 5e were designed and synthesized,and it was the first time to discover that aromatic radical-induced intramolecular aromatic 1, 5-hydrogen transfer was also involved in the nitrogen-contianed system during Pschorr cyclization.

实验设计合成了4--3-氨基-1，8-萘酐的重氮盐5a、其衍生物N-丁基-4--3-氨基-1，8-萘酰亚胺的重氮盐5b和N--4--3-氨基-1，8-萘酰亚胺的重氮盐5c，并首次发现了通过普朔尔环化反应以氮甲基化的氮为桥原子的体系存在着芳香自由基诱导的芳香1，5-氢转移。

An extremely dicey future on a brave new world of liquid nitrogen,tar,and smogbNew Yorker

主要的目的是要逃脱传统的音乐声响，进入一个崭新的音调实践的世界。

The results showed that, both diene and alkaline nitrogen-containing compounds had negative influence on the aromatization stability of the catalyst.

用小型固定床加压反应器研究了液化石油气（C4 LPG）中的丁烯在纳米ZSM-5型催化剂DLG-1上的低温芳构化反应，重点考察了原料中二烯烃和碱性氮杂质，以及反应温度、压力和C4 LPG进料重量空速条件对催化剂芳构化反应活性及稳定性的影响。

It is assumed that non-bound amino nitrogen is correlated with higher digestibility.

据认为未被结合的氨基氮与较高的消化率有关。

But apparent digestibility of the urea nitrogen is not much different, because it is easier to be decomposed.

消化道中以蛋白质形态存在的~(15)N标记氮比例以盲肠内容物最高，在正常食粪兔高达78.5％，这主要是盲肠微生物代谢的结果。

Under nitrate-limited conditions the growth of Skeletonema costatum increased significantly due to its small cell size and lower demand for nitrogen, while the two dinoflagellate with large cell size increased slowly and resulted very low cell yields.

属于甲藻的微小原甲藻和塔玛亚历山大藻与属于硅藻的中肋骨条藻相比，具有较低的营养盐亲合力和比生长速率。

The concentration of nitrogen dioxide in Beijing's air was reduced by an average of 20 per cent.

北京空气中二氧化氮的含量平均降低了20%。

Diphenylamine method) and 2600mgkg-1NO3-. Based upon the results from nitrogen nutritional diagnosis.

确定了春小麦用两种方法进行氮素诊断的临界值分别为2.55（NO3-N色阶，二苯胺法）和2600mgkg-1（NO3-，反射仪法）。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。