氮的

Nitrite nitrogen and ammonia nitrogen were the main components in the deteriorative aquaculture water.

亚硝酸盐氮和氨氮是养殖水体恶化的主要成分。

The reaction mechanism for the formation of ultimate carcinogens diazohydroxide, diazonium and oxoniumions by α-hydroxylation-NPYR and the alkylation process of C and guanine were investigated including solvent effects at the B3LYP/6-31G(superscript **) level.

采用密度泛函理论，在B3LYP/6-31G水平上，研究了气相和水溶剂中，α-羟基化吡咯烷亚硝胺(-αhydroxylation-NPYR， A)代谢为终致癌物重氮氢氧化物、重氮烷阳离子和氧离子，以及C与鸟嘌呤碱基相互作用的反应机理。

The stronge interaction between EMimBF4 and nitrobenzene, and its intermediates yielded in the process of electroreduction caused the selective reaction.

通过控制电位，可以选择性地合成氧化偶氮苯和偶氮苯；在EMimBF4中，硝基苯和水的浓度变化对电化学行为产生较大影响。

Purpose To study the expression of endothelia nitric oxide synthase and inducible nitric oxide synthase in breast cancer and their relationships to metastasis.

目的 ：研究内皮型一氧化氮合酶、诱导型一氧化氮合酶在乳癌中表达及与淋巴结转移的关系。

But foliar N of the remaining mass still decreased with decreasing mass, mainly due to mineralization.

但氮剩余量仍随重量的减少而下降，可能由於氮只发生矿质化作用。

Methods:A total 60 New Zealand rabbits were divided into five groups with twelve rabbits in each group:nomal saline control group,atherosclerosis group,atherosclerosis and smoking group,atherosclerosis and give glonoine group and atherosclerosis followed smoking and glonoine group.After 23 weeks,serum levels or activates of SOD,NO,NO synthase,6-keto-PGF1α and ET in each group were determined.

将60只纯种新西兰兔随机分为生理盐水组、动脉硬化组、动脉硬化礼顿组、动脉硬化吸烟组和动脉硬化吸烟礼顿组。23周后取血，检测血中超氧化物歧化酶、一氧化氮、一氧化氮合酶、前列腺素（6-Kato-PGF1α）和内皮素的含量或活性，并作比较。

And the improving effect of leguminous was better than gramineous planting grass while soil layer deep down.

在生草区0～40cm土层，果树与牧草养分需求重叠，导致生草区土壤库全氮、全磷、全钾含量下降，但该土层水解氮、速效磷、速效钾的含量增加。

Soil total N and total hydrolyzable N were significantly influenced by the application of organic fertilizer.

而施用有机肥料对土壤的总氮及可水解全氮有显著影响。

In TDARES experimental soils, except SBM and PC treatments, the concentrations of total N and total hydrolyzable N of other organic fertilizer treatments are higher than those of Chem treatment.

桃园区农业改良场之土壤，除大豆粕及鸡粪堆肥处理外，施用其他有机肥料处理的总氮及可水解全氮浓度均显著高於化学肥料处理者。

The content of endogenous hormones, including IAA, ABA, GA3 and ZT, and phenol compounds were measured using HPLC, anti that of total sugar and total nitrogen were analyzed by the methods of hyposulphite titration and nitrogen.

采用高效液相色谱法测定插穗内源激素（IAA、ABA、GA3和ZT）和酚类化合物的含量，硫代硫酸钠滴定法测定总糖和凯式定氮法测定总氮含量。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。