氮的

The results showed that the best carbon and nitrogen sources for xylanase production were lactose combined with beef extract.

结果表明，里氏木霉产两种酶的最佳碳源和氮源各异，其中木霉产木聚糖酶的最佳碳源为乳糖，氮源为牛肉膏；而产β-葡聚糖酶的最佳碳源为麸皮，氮源为硫酸铵。

The nitrides with high specific surface area from oxide precursor can be prepared through temperature-programmed reduction via topotactic reaction in ammonia or nitrogen under strict reduction conditions.

在基本不破坏氧化物前驱体晶体结构和严格的氮化条件下，氧化物前驱体通过程序升温氮化经由&局部规整反应&可以制备出高表面积的过渡金属氮化物。

As there was no nitrogen in the solution before experiment, the nitrogen in amino acids should have resulted from deposition of 〓 from outside.

由于反应溶液中本不含氮，故氨基酸中的氮应是外来氮离子沉积于溶液中的结果。

The cotton lint yield was correlative with nitrogen concentration in fruit-branch leaf, which would cause the lint yield reduction when it was lower or higher than critical nitrogen value in fruit-branch leaf.

在大田栽培条件下，于江苏南京和河南安阳设置了棉花施氮水平试验，依据Justes的临界氮浓度稀释模型确定方法，研究棉花花后果枝叶临界氮浓度稀释模型及其与棉花产量的关系。

The expression of one-dimensional mathematical model of vertical migration of ammonia in the CRI system is:The parameters in the CRI model are determined as following: the retardarce coefficient is determined by static isothermal absorption experiment, the velocity of sewage travel through the soil column is determined by permeability test, the vertical dispersion coefficient is determined by test the electric conductivity of tracer in the dispersion experiment, the rate of nitrification and denitrification is determined by test of Baps technology.

依据单一氨氮、硝氮配水条件下的试验结果，引入多孔介质的溶质运移理论及对流-弥散方程，考虑NH4+-N在CRI系统中的运移受到对流和水动力弥散作用的影响，并吸附-解吸、硝化与反硝化3个过程，首次将配水流经CRI土柱的孔隙水流速方程与CRI土柱内发生的、以氧为约束条件的硝化、反硝化过程联系起来，建立了CRI系统一维垂向氨氮运移转化数学模型，表达式为：研究分别通过静态等温吸附实验率定了模型方程中的阻滞系数、通过渗滤试验测定了土柱中的孔隙水流速、通过测定弥散试验中示踪剂的电导率确定了纵向弥散系数、通过气压过程分离技术测定了土柱中的总硝化与反硝化反应速率常数，最后通过测定土柱沿程氧化-还原电位的方法分析氨氮在CRI系统中的运移转化机理。

A two-year field experiment was conducted to investigate ammonia volatilization from Gleyed paddy soil in the Taihu Lake region. The experiment was designed to have four N levels 0, 180, 255, 330 kg hm^(-2 and four P205 levels 0, 30, 90, 180 kg hm^(-2, forming six NP combinations (CK-N0P0, LN-N180P90, OPT-N255P90, LP-N255P30, HP-N255P180 and HN-N330P90). Ammonia volatilization was measured with the enclosure method.

在太湖地区乌栅土上，采用田间小区试验连续两年研究了施氮量为0、180、255、330 kg hm^(-2)，施磷(P2O5)量为0、30、90、180 kg hm^(-2)的6个组合（对照N0P0低氮N180P90、优化N255P90、低磷从N255P90、高磷N255P90、高氮N330P90）以及三个施肥时期对稻田氨挥发损失的影响，氨挥发采用密闭室间歇通气法测定。

Under the field condition,maize yield,total uptake,net uptake,physiological rate and agronomic use efficiency of nitrogen were the same as CK or increased.The apparent utilization rate of nitrogen was enhanced by 14.8%～15.2% treated with urea reduced by 5%～15%(7.8～23.7kg/hm~2) and added with compound nitrogen fertilizer synergists.

在大田条件下，尿素氮减少5%~15%(即减少施氮7.8~23.7kg/hm2)配施复合氮肥增效剂不影响玉米的单季产量，玉米植株吸氮总量、氮素净吸收量、氮肥生理效率和农学效率与不施增效剂的处理相当或增加，氮素表观利用率提高

The results indicated that the activation extent of nitrogen depends on the number of feedback orbitals.

计算结果表明，氮氮键的活化程度由Ru2对氮起反馈作用的轨道数目决定。

Water quality indices such as TN, NH+4-N, NO-3-N, TP, DIP, DOP, PP were examined in both the head races and the offtakes during the two irrigation events.

分析了2次灌溉期的各引水渠和排水渠中总氮、氨氮（NH+4-N）、硝氮NO-3-N）、总磷、溶解性无机磷、溶解性有机磷、颗粒磷的变化情况。

At intraspecific level,leaf N decreased with increase of altitude,while leaf P showed no clear pattern along altitude.Leaf N was significantly positively related to mean annual air temperature(r=0.616**),but negatively related to soil water content(r=-0.640**).

叶片氮含量与年均气温呈显著正相关关系(r=0.616**)，与土壤水分呈显著负相关关系(r=-0.640**)，与土壤有机质、全氮均呈显著负相关关系(r=-0.591**，r=-0.564**)；叶片磷含量与年均温、土壤水分之间的关系不显著；叶片氮、磷之间的比率为10.2。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。