查询词典 nitrogen-free

The results indicated as pH values in the range from 4.50 to 7.50, the volume and dry weight of root increased as pH values increased, as well as AAAR,TAAR. The relationship of nicotine and total nitrogen accumulation with pH values was parabola,the functions were Y=-61.429X2+391.17X-162.8 (F=l 8.45), Y=-24.3X2+154.88X+52.7 (F=14.40**) respectively. When pH value got rise to 7.50, the accumulation of nicotine and total nitrogen attained the highest .

主要研究结果如下： 1 不同pH值(4.50、5.50、6.50、7.50、8.50)对烤烟根系发育、根系吸收面积以及对烟叶烟碱、总氮、蛋白质和多酚物质积累影响的研究结果表明pH值在4.50～7.50范围内，根系体积和干重都随着pH值上升而增加，AAAR、TAAR也随着升高，烟叶中烟碱、总氮累积量随着pH值上升而增加，烟碱和总氮累积量与pH之间呈抛物线关系，关系式分别为Y=-61.429X~2+391.17X-162.8，F=18.45~；Y=-24.3X~2+154.88X+52.7，F=14.40~，pH值对烟碱和总氮累积量的影响存在极显著差异，当pH值升至7.50时，烟碱和总氮累积量达到最高值。

In this paper, the mechanism of nitrogen cycle was explored in the Yangtze River estuary. The results show that δ15N of SPM was in a wide range of 0.6‰ and 8.2‰, varying with seasons and geographic regions. The temporal and spatial variation reflected different influences of terrigenous inputs and nitrogen biogeochemical processing.

研究发现：该海域悬浮颗粒有机物的稳定氮同位素组成(δ15Np)分布范围较宽，在0.6‰～8.2‰之间，具有明显的时空分布特点，反映了不同程度的陆源输入和氮的生物地球化学过程的影响。

In ultraviolet and spark discharging, dichloromethane, trichloromethane, tetrachloromethane and 1, 2-dichloroethane can react with nitrogen dioxide and nitrogen oxide respectively rapidly.

由此得到氯代烷与NO〓在火花放电、紫外光照射条件下，将发生快速化学反应。这对了解臭氧层中卤代烷烃和氮氧化物之间的化学反应有一定的参考意义。

The affection to growth of the strain was investigated with different carbon sources (yeast extract, smelting starch, sucrose and glucose) and nitrogen sources (NH42SO4, Ca(NO3)2, peptone and tryptone, and the result showed that the yeast extract was the best carbon source, whereas the peptone was the best nitrogen source.

通过比较酵母膏、可溶性淀粉、蔗糖和葡萄糖等不同碳源以及(NH4)2SO4，Ca(NO3)2，蛋白胨和胰蛋白胨等不同氮源对该菌株生长的影响情况，结果表明：酵母膏为其最佳碳源，蛋白胨为其最佳氮源。

Nitrogen forms in compound fertilizer affected biomass accumulation of maize too,and the highest dry weight of shoot and root was found in the plants supplied with compound fertilizer containing 100% urea nitrogen in Udic Isohumisols,and mixed nitrate and ammonium in Udic Cambosols.

生长45 d玉米苗的地上和地下部的生物量，在黑土上均以全酰胺态氮的配方最高，地上部干重较其他配方增加10%左右；而在潮土上则以铵态氮与硝态氮配方的效果最好，铵态氮和酰胺态氮混合的配方在2种土壤上均较差。

To study the effects of placement of water and nitrogen on transport and utilization of water and nitrogen in maize root zone. Experimental treatment have fertilizing in the irrigated furrow and unirrigated furrow.

为研究灌水和施氮位置对玉米根区水氮迁移和利用的影响，通过春玉米水氮同区、异区隔沟灌溉试验，研究了不同水氮处理根区土壤水氮迁移和水氮利用规律。

Suggestion is firstly put forward that both of the microprecipitates condensed by N-N pairs and the N-O complex might act as the heterogeneous nuclei for the nitrogen and oxygen involved precipitation with high heat stability. Nitrogen is fixed into them, which determines the unreversible annihilation of NRD.

在此基础上，本文进一步探讨了NRD的热稳定性及其消除规律，首次提出N-N对自凝聚而成的微沉淀态以及N-O复合物皆可能成为具有较高热稳定性的微氮氧沉淀的异质成核中心，氮被固化其中，NRD得以不可逆消除。

In order to prevention, control and extinguishing underground fires effectively, through the application of nitrogen injection for coal mine fire prevention, this paper discussed a very valuable and practical technology that nitrogen injection for fire control and prevention in coal mine well, it can be used for the prevention of coal spontaneous combustion, fire control and stifle the fire zone, controllable sealing and unsealing fire area.

为了有效预防、控制和扑灭井下火灾，通过煤矿对注氮防灭火的实践应用，认为以注氮为主的防灭火是井下预防火灾和减少火灾损失的一种非常有价值和实用的技术，它可用于煤矿自燃发火的预防、火势控制、窒息火区、可控制的缩封和启封火区。

Protein nitrogen accumulation in leaf-stems of Yuchi 231 was significantly lower than those of 4434 and Dianrui 302, while that was significantly higher in grains, suggesting higher nitrogen accumulation in grains was a key characteristics of the rice genotype with high NHI.

余赤231灌浆期叶片和籽粒谷氨酰胺合成酶和谷氨酸合成酶活性显著高于4434和滇瑞302，有利于叶片游离氨基酸合成及外运，使得穗颈节伤流强度和游离氨基酸含量升高，为籽粒氮素积累提供了物质基础；同时，较高的籽粒Gs和GOGAT活性促进了籽粒蛋白质合成，提高了NHI。

But after about a month to restore the root system, the leaves of nitrogen, phosphorus and potassium contents in treatment 5, 6, 7, 8, 2 gradually higher than the control. This is because the absorption of fertilizer during this period shown to promote on the elements, and with the passage of time the processing elements continue to be reduced to a leaf until the latter part of the growing season is also higher than the control.3.The pH value in rhizosphere soil of treatments poplar plantation were lower than that in non-rhizosphere soil, but the content of organic,available nitrogen, phosphorus, potassium, utility cuprum and utility zincum were all higher than those in non-rhizosphere soil.

但是经过大约一个月的根系恢复，处理5、处理6、处理7、处理8、处理2叶片中的N、P、K逐渐高于对照，这是因为施肥对元素的吸收在这一期间开始表现出了促进作用，并且随着时间的推移各处理中元素含量持续降低至落叶，直至后期的生长季节也高于对照。3、各处理的杨树林地根际土壤pH值均低于非根际土壤，而有机质、碱解氮、速效磷、速效钾、有效铜和有效锌的含量均高于非根际土壤，与其它处理相比，80cm两侧断根施肥处理的根际土和非根际土壤速效养分含量最高，差异达显著水平。

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。