氮化的

Activities can cause a very large release of DIN by virtue of excretion, burrowing, bioturbation and sediment resuspension. Developed cave in sediment and continual turnover of sediment by crab can improve an organic matter remineralization and ammonification, consequently reworking the DIN vertical profile in sediment.

蟹类活动造成的洞穴结构及对沉积物的翻动混合能增加沉积物中的氧气含量，促进沉积物中有机氮的矿化和NH(上标+下标 4)的释放，造成无机氮在沉积物中的剖面分布特征发生较大变化。

The results showed that, both diene and alkaline nitrogen-containing compounds had negative influence on the aromatization stability of the catalyst.

用小型固定床加压反应器研究了液化石油气（C4 LPG）中的丁烯在纳米ZSM-5型催化剂DLG-1上的低温芳构化反应，重点考察了原料中二烯烃和碱性氮杂质，以及反应温度、压力和C4 LPG进料重量空速条件对催化剂芳构化反应活性及稳定性的影响。

Therefore,we tested the decomposition and mineralization of organic matter within 24 hours in an aquarium to investigate the role of nitrobacteria in the process.

有机质矿化分解的氮、磷等营养元素极易引起水体富营养化，进而影响生命体在水中的消长，水体有机质矿化是目前研究的热点[1-3]。

Catalytic aziridination and amidation reactions are two important reactions in organic synthesis and useful building blocks for organic synthesis, which make them attractive synthetic targets in their own right.

催化氮杂环丙烷化及酰胺化反应是有机合成中的两类重要反应，是有机合成之砌块，其合成方法是重要的研究课题。

A new fused polycyclic indoline compound was synthesized from aniline,with the key step of Pd-catalyzed tandem cyclization using hydroquinidine as the ligand and molecular oxygen as a green oxidant.

以芳香氨为原料，通过烯丙基化、重排、酰基化及钯催化的氧化环合反应合成了一种新的氮杂三环吲哚啉化合物，其结构经1H NMR，13C NMR，IR及HR-MS表征。

In order to obtain versatile ulitity of host molecules, three new chiral calix [4] crown ethers containing aza, thio atoms bearing two chiral sites provided by -cysteine ester were synthesized by the condensation of calix [4] arene diacid dichloride with oligoethylene glycol bridged bis-amino acid methyl ester. All new compounds were characterized by NMR, MS and elemental analysis.

以-半胱氨酸为手性源，利用多甘醇二氯醚在碱性条件下对半胱氨酸巯基进行烷基化反应，成功地合成了多甘醇醚链桥联的半胱氨酸衍生物，醚化反应后，在高度稀释条件下与对叔丁基杯[4]芳烃二乙酰氯进行双功能基缩合反应成功地合成了新型的手性杯[4]含氮、硫杂冠醚，并利用〓H NMR、MS等谱图手段对其结构进行了表征。

The side chain of thioacetic acid has been sythesized from the material of acetic acid via four steps, then synthesized the key intermediate of 2-hydroxypenem via displacement, P〓induced cyclization and hydrolyzed reaction from the material of azetidinone.

以羟乙酸为原料，经四步反应合成了侧链化合物硫基取代的羟乙酸，发生取代反应导入到经七步合成的单环氮杂环丁酮中，然后发生酰化，Wittig诱导环化，水解等五步反应合成关键中间体2-羟甲基青霉烯。

Recent progress of dimethyl carbonate which acted as methylating reagent in methylation reaction s that took place on carbon, oxygen, nitrogen and sulfur atoms was reviewed.

综述了碳酸二甲酯作甲基化试剂在碳、氧、氮和硫原子上进行甲基化反应的研究进展，提出了今后研究工作的发展方向。

Microbial biomass carbon and microbial biomass nitrogen, respiration CO2 and mineralized nitrogen in plant straw fertilized soil were determined under laboratory incubation conditions of constant temperature and moisture based on field above- ground yields of intercropped sweet maize straw and white clover straw.

根据田间甜玉米／白三叶草套种各作物的秸秆产量，在恒温恒湿条件下进行室内培养，探讨秸秆不同方式还田后土壤微生物量碳、微生物量氮、呼吸产生的CO2和矿化产生的无机氮的变化规律。

On the contrary, sulfonated poly(arylene thioether phosphine oxide)s, with a IEC of 1.60 meq/g, even denote a swelling of 70.1% at 80oC and thus lose most of the mechanical strength.

而前述IEC为1.60 meq/g的磺化聚芳硫醚三苯基氧膦在80oC下的溶胀率为70.1%，已经出现溶胀突变，显著丧失力学强度，其耐溶胀性能比磺化聚二氮杂萘酮醚三苯基氧膦差得多。

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。