铵的

The change of remaining litter weight was the largest in the earlier 30 days during 60-day litter decomposition, and there was no significant difference in subsequent 30 days. The phenolic acid content of litter was significantly reduced with the decomposition time prolonging, and the releasing quantity of phenolic acid was the highest at the tenth day. The amounts of soil Aerobic azotobacter, Ammonifier and Aerobic cellulose-decomposer and the soil chemical properties such as pH, phenolic acid content, NH+4-N and available phosphorus were significantly affected by the litter aqueous extract of four decomposition stages.

凋落物分解的60d中，凋落物残留量在前30d内变化最大，30d后无显著变化；凋落物中酚酸含量随分解时间的延长，呈显著降低的趋势，且在分解10d时，酚酸释放量最大。4个分解动态的凋落物浸提液显著地改变了土壤好气性自生固氮菌、氨化细菌、好气性纤维素分解菌的数量和土壤pH值、酚酸含量、铵态氮、有效磷等化学性质。

The phenolic acid content of litter was significantly reduced with the decomposition time prolonging, and the releasing quantity of phenolic acid was the highest at the tenth day. The amounts of soil Aerobic azotobacter, Ammonifier and Aerobic cellulose-decomposer and the soil chemical properties such as pH, phenolic acid content, NH+4-N and available phosphorus were significantly affected by the litter aqueous extract of four decomposition stages.

凋落物分解的60 d中，凋落物残留量在前30 d内变化最大，30 d后无显著变化；凋落物中酚酸含量随分解时间的延长，呈显著降低的趋势，且在分解10 d时，酚酸释放量最大。4个分解动态的凋落物浸提液显著地改变了土壤好气性自生固氮菌、氨化细菌、好气性纤维素分解菌的数量和土壤pH值、酚酸含量、铵态氮、有效磷等化学性质。

In this thesis, a convenient and efficient synthesis of highly functionalizeddihydropyrido[2,3-d]pyrimidines via a double [5 + 1] annulation strategy startingfrom easily available α-alkenoyl-α-carbamoyl ketene--acetals 1 and cheapreagents (NH4OAc, DMF, and POCl3) has been developed.

本论文探索了一种简便有效的合成高度官能化的二氢吡啶并[2，3-d]嘧啶的方法，此方法由易得的α-乙酰基-α-氨基乙酰基二硫缩烯酮1和便宜的试剂(醋酸铵，二甲基甲酰胺和三氯氧磷)通过两步[5 + 1]加成而实现。

We have previously demonstrated the presence of ammonium in this medium upon the exhaustion of asparagine (Hoskisson et al. 2004), and this suggests that,proteolytic enzymes were produced in response to depletion of a preferred nitrogen source from the medium, prior to the onset of sporulation.

之前我们已经证实在这一领域的存在的铵后，用尽了天冬酰胺（Hoskisson等。2004年），这表明，蛋白水解酶的生产响应从中期的首选氮源枯竭，前发病的孢子。

The first step of the process includes the aerobic oxidation of reduced nitrogen compounds to nitrite and nitrate by specialized, autotrophic bacteria.

第一过程的步包含生存于氧气中的氧化的减少的氮是经过专门，靠无机物质生存的细菌混合特别是向亚硝酸根和硝酸盐铵。

Thermogravimetric results indicate that the IFR takes part in the decomposition reactions of PP and promotes it to carbonize as the IFR PP undergoes heating and burning. Elemental analysis and infrared spectrum of the burnt residues and swollen char reveal that the phosphorus is m...

元素分析和红外光谱结果表明，IFR－PP受热燃烧时磷主要积聚在燃烧端面并以磷酸及其相应的铵盐存在，它们的形成与IFR受热燃烧时的一系列变化有关，并有助于焦化物的进一步炭化和提高材料的阻燃性能。

Due to large amount impurity in ammonium fluoaluminate which is used as raw material for the production of fluoride salt ,the smooth operation and the quality of cryolite are affected.

用氟化盐生产的原料氟铝酸铵中机械杂质多，影响了车间正常生产和冰晶石产品质量的现状，提出使用弧形筛过滤料浆，除去其中的机械杂质，来解决上述问题的方案，经生产试用，效果良好，取得了很好的经济效益。

The properties and structures have been investigated as well by X-ray diffraction, infrared absorption spectrum and differential thermal analysis. The solvent dilatability and gelation ability, viscidity and organic content have been tested.

以十六烷基季铵盐为有机化改性剂，用微波辐射加热的方法制备出了性能优良的有机膨润土，利用XRD、FT-IR、DTA等方法分别对合成的钠基膨润土和有机膨润土的结构进行了研究和表征；并初步测试了有机膨润土的溶胀性、凝胶性能、粘度和有机物含量。

The phytoplankton community was mainly composed of Cyanophyceae, Euglenophyceae, Bacillariophyceae, and Chlorophyceae, and the dominant species were Oscillatoria subtillissima, Dactylococcopsis irregularis, Euglena caudata, Melosira granulata, Cyclotella meneghiniana, Chlorella vulgaris, and Scenedesmus quadricauda. The main environmental factors affecting the distribution of phytoplankton species in July were ammonium-nitrogen, dissolved oxygen, water temperature, and total phosphorus, while those in September were pH, water temperature, dissolved oxygen, transparency, and total nitrogen. Water transparency and zooplankton were the main factors affecting the biomass of Cryptophyceae, Pyrrophyceae, and Bacillariophyceae; while nitrogen, phosphorous, and dissolved oxygen were the main factors affecting the biomass of Cyanophyceae, Euglenophyceae, and Chlorophyceae.

结果表明：调查期间共鉴定出浮游植物384种，隶属于8门，浮游植物密度范围为2.01×105～57.60×105 cells·L-1；群落组成以蓝藻、裸藻、硅藻和绿藻为主，主要优势种有细微颤藻、无常蓝纤维藻、尾裸藻、颗粒直链藻、梅尼小环藻、普通小球藻、四尾栅藻等；7月影响浮游植物分布的主要环境因子依次为铵态氮、溶解氧、水温和总磷，而9月的pH值、水温、溶解氧、透明度和总氮含量对浮游植物的分布产生影响较大；其中，透明度和浮游动物量是影响隐藻、甲藻和硅藻藻类生物量的主要环境因子，而蓝藻、裸藻、绿藻主要受水体氮磷营养盐浓度和溶解氧的影响。

Water column samples taken from the northern and the southern lake centers in Hongfeng lake in summer stratification were measured about their water temperature, pH, the concentration of HCO3(superscript -), DO, Chla, NH4(superscript +), NO3(superscript -)、and PO(superscript 3- subscript 4). The pressure of CO2 (pCO2) was calculated by the chemical balance and the Henry's law.

在夏季分层期间对红枫湖南、北湖湖心的水样进行分层采集，同时测定了分层水样的温度、pH、HCO3浓度、溶解氧、叶绿素a及铵根离子NH4(上标+、硝酸根离子NO3(上标-、磷酸根离子PO(上标 3-下标 4的浓度，水体中CO2的分压(pCO2)由化学平衡及亨利定律求得。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。