查询词典 nitrogen-free

It is concluded that the soil easily mineralizable nitrogen and microbial biomass nitrogen can be taken as the biological ...

在盆栽试验条件下，土壤易矿化有机态氮和种植前土壤微生物态氮能够较好地反映土壤氮素的矿化和供应能力，可以作为土壤氮素的生物有效性指标。

Soil easily mineralizable nitrogen ; microbial biomass nitrogen ; biological available index

易矿化有机态氮；微生物态氮；生物有效性

The results show that the2 0～ 40 cm and40～ 60 cm layers for the red loessial soil and2 0～ 40 cm layer for the red loessial soil had a large amount of easily mineralizable nitrogen besides the0～ 2 0 cm layer, but the easily mineralizable nitrogen was little...

总体上看，红油土中氮素的矿化和硝化作用强于红垆土。铵态氮肥在粘粒含量少、有机质含量高土层中的迅速减少主要归咎于硝化，而在粘粒含量多、有机质含量少的土层，主要取决于矿物固定

When initial NO3--N was leached, the correlation coefficients between soil initial NO3--N and mineral N extracted by CaCl2 before aerobic incubation with raygrass nitrogen uptake were decreased to 0.613 and 0.607, respectively, and both reached 5% significantly level. However, the correlation coefficients between mineralizable N extracted by aerobic incubation, soil initial mineral N and mineralizable N extracted by aerobic incubation, N0 and soil initial mineral N and N0 with raygrass nitrogen uptake were raised obviously, and all reached 5% and 1% significant level.

以不包括土壤起始NO3--N盆栽试验植物吸氮量为参比，通气培养前CaCl2淋洗起始NO3--N和起始矿质氮与五期黑麦草地上部氮素累积量间的相关性尽管有所降低，但相关性仍达5%显著水平，相关系数分别为0.613和0.607；而通气培养30周矿化氮素、土壤起始矿质氮+通气培养30周矿化氮素、N0及N0+起始矿质氮与五期黑麦草地上部吸氮量的相关系数却明显提高，相关系数分别为0.718，0.782，0.688 和0.640，均达5%或1%显著水平。

Among the open-chain crown ethers and cryptands with a same structure, the compounds disubstituted at the amide nitrogen atoms show the larger extractability for Am and Eu than the monosubstituted ones. The compounds disubstituted at the amide nitrogen atoms by two phenyl groups show the larger extractability for Am and Eu than those by two alkyl groups.

3在结构相同的开链冠醚和开链穴醚中，酰胺氮原子上二取代化合物对Am和Eu的萃取能力大于一取代化合物；酰胺氮原子上两个取代基都是苯基的化合物对Am和Eu的萃取能力大于两个取代基都是烷基的化合物。

The bonds of nitrogen-nitro mainly affect the sensitive of blast and the stability of Nitrogen heterocyclic nitramine.

另外对DNDC和NPI这两个同属于六元环的氮杂硝胺类的炸药分子进行计算研究。

The research results showed that the growth of Nitrobacter always depended on the conversion of ammonia-nitrogen to nitrite-nitrogen by Nitrosomonas under both no aeration and aeration.

研究结果表明，在无曝气条件下和曝气条件下，填料上硝酸盐细菌的生长均依赖于亚硝酸盐细菌转化氨氮为亚硝酸盐氮的过程。

Long running performance showed that due to the membrane interception,the nitrobacter is enriched in reactor in the interest of improving the nitrification rate;the maximum ammonia nitrogen loading can be 0.19 kg/(m3·d) with effluent ammonia nitrogen＜1 mg/L (removal rate 99%).

采用浸没式膜生物反应器处理焦化废水的试验结果表明：膜的截留作用可使硝化菌在反应器内富集而有利于提高系统的硝化能力，其去除氨氮的最高负荷为0.19kg/(m3·d)，出水氨氮＜1mg/L(去除率为99%)；泥龄长可能使微生物的代谢产物或其他大分子物质积累，从而

Long running performance showed that due to the membrane interception,the nitrobacter is enriched in reactor in the interest of improving the nitrification rate;the maximum ammonia nitrogen loading can be 0.19 kg/(m3·d) with effluent ammonia nitrogen＜1 mg/L (removal rate 99%).

焦化废水含氮量高且含有大量有毒和难降解物质，若采用传统生物处理工艺不但流程较长，处理效果也较难达到要求，而膜生物反应器通过膜分离强化了生物处理效果，克服了传统工艺的弊端［1］。

Nitrogen species in FCC diesel oil include basic species (such as aniline, quinoline, and their derivatives) and nonbasic species (such as indole, carbazole, and their derivatives), and only 0.1% of the nitrogen compounds are quinoline and about 64% of them are carbazole and their derivatives.

氮化物主要为碱性氮化物和非碱性氮化物两大类型，其中碱性氮化物主要是苯胺及其衍生物，喹啉含量很低，约占总氮质量分数的0.1%，非碱性氮化物主要包括吲哚及其衍生物和咔唑及其衍生物，而咔唑类氮化物一般约占总氮质量分数的64%。

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。