查询词典 nitrogen-free

In two series experiments by-pass nitrogen, amino acid passage to the abomasum, rureen metabolic parameters and nitrogen utilization were studied respectively.

利用四头装有瘤胃和皱胃瘘管的阉公羊以及四头未装瘘管的阉公羊进行两系列实验，测定通过瘤胃蛋白、皱胃氨基酸通过量以及瘤胃消化代谢和氮的利用。

The materiel balance of Nitrogen and Phosphorus in the static examination shows: In eliminating of the nitrogen, Ipomea aquatica absorbing and the artificial medium nitrify contributing up to 31.8% and 38.7%; in eliminating the phosphorus, the contribution that Ipomea aquatica absorbing is 26.7%.

静态运行条件下的氮磷物料衡算显示：在总氮的去除中，空心菜吸收及人工介质反硝化的贡献分别达到了31.8%、38.7%；在总磷的去除中，空心菜吸收的贡献为26.7%。

The strain could denitrify sodium nitrate in aerobic environment and nitrify in the culture media with sodium acetate as carbon source and ammonium sulfate as nitrogen source , as well as acetamide as the sole carbon and nitrogen sources .

该菌株以硝酸钠为氮源时能进行好氧反硝化作用；以乙酸钠和硫酸铵分别为碳源和氮源能进行异养硝化作用，能以乙酰胺为唯一碳源和氮源进行生长。

Although there is 34,500 tons of gaseous nitrogen in the air column above each acre of the earth's surface, this cannot be used by plants until it has been fixed by nitrogen-fixing bacteria and algae.

虽然在地球表面每英亩空气柱中有34，500吨气态氮，但是如果这些气态氮不被固氮菌和藻类固定，是不能被植物利用的。

The final refinement converged to R=0.0686 and 0.0688. In the two complexes, the metal atom is coordinated with one nitrogen atom of alkylamine and three sp^2 nitrogen atoms from NTB and one oxygen atom from H~2O to form a distorted trigonal-bipyramid configuration.

配合物中的金属原子与配体NTB分子中的一个烷胺氮原子、三个sp^2氮原子和一个水分子中的氧形成五配位的扭曲三角双锥构型。

It increased the content of chlorophyll, soluble protein, ammoniac nitrogen and soluble sugar in functional leaves, but declined the content of starch and nitrate nitrogen in functional leaves during the whole growth period of cotton.

研究表明，增加硝化抑制剂有利于棉花在生长发育的各个时期，功能叶片叶绿素、可溶蛋白、氨基态氮、可溶糖含量的积累，但抑制淀粉和硝态氮含量的积累。

The result indicates that with organic fertilizer and inorganic nitrogen fertilizer can obviously increase the leaf dimension coefficient, enhance the content of chlorophyll and soluble protein, improve the SOD activity of flag leaf, depress the content of MDA, postpone the speed of decrepitude of flag leaf,; The status with high content of chlorophyll and leaf dimension coefficient lasts longer with organic fertilizer than with inorganic nitrogen fertilizer and the flag leaf have longer functioning time; the combination of inorganic nitrogen fertilizer and organic fertilizer can substantially postpone the speed of decrepitude of winter wheat.

在国内持续时间最长的肥料长期定位（28年）试验条件下，研究了肥料持续施用下冬小麦花后叶面积系数等生理指标的变化，结果表明施用有机肥、氮肥，可明显增大小麦的叶面积系数，增加叶绿素含量和可溶性蛋白含量，提高旗叶的SOD活性，降低丙二醛的含量，延缓旗叶的衰老；施用有机肥较施用氮肥，叶绿素含量及叶面积系数持续高值时间长，旗叶有更长的功能期；长期氮肥与有机肥配施能显著延缓小麦衰老。

The results indicated: the nitrogen of root,stem and leaf was mainly from soil and fertilizer nitrogen at growth stage,and the nitrogen from root nodule azotification started and increased at later growth...

结果表明，在大豆生育前期土壤氮和肥料氮是根、茎、叶片氮素的主要来源，在生育后期根瘤固氮开始增加；随生长大豆荚果氮素中土壤氮所占比例逐渐减小，根瘤固氮所占比例逐渐增加，并在收获期(R8)达到总量的70.6%，肥料氮所占比例一直很低。

The results indicated: the nitrogen of root,stem and leaf was mainly from soil and fertilizer nitrogen at growth stage,and the nitrogen from root nodule azotification started and increased at later growth stage.

结果表明，在大豆生育前期土壤氮和肥料氮是根、茎、叶片氮素的主要来源，在生育后期根瘤固氮开始增加；随生长大豆荚果氮素中土壤氮所占比例逐渐减小，根瘤固氮所占比例逐渐增加，并在收获期(R8)达到总量的70.6%，肥料氮所占比例一直很低。

Nitrogen gas (N2) makes up 78 percent of our atmosphere, but most organisms cannot utilize this source of nitrogen to grow, because the nitrogen atoms are held together by a tight triple bond so strong that it requires extreme temperatures and pressures to break.

氮气构成了大气的78%，但是大部分的有机物不同利用这一资源来生长，因为氮原子十分坚固的固定在了一起，他们需要特别的高温高压才会被分裂进而被生物利用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。