氮化

Benzyloxy benzoyldimethylsulfoxide was prepared by the reaction of ethyl 4-benzyloxybenzoate and dimethyl sulfoxide in the presence of sodium hydride, followed by Pummerer reaction with concentrated hydrochloric acid to afford eo-hydroxy-co-thio-methyl-(4/-benzyloxy) acetophenone, which reacted with urea, thiosemicarbazide, semicarbazide hydrochloride and o-phenylenediamine to give imidazolidine-2,4-dione, l,2,4-triazine-3- one and quinoxaline derivatives, respectively.

本文用4-苄氧基苯甲酸乙酯和二甲亚砜为原料，在氢化钠存在下反应，合成了(4′-苄氧基)-苯甲酰基-二甲亚砜。研究了该亚砜在浓盐酸的存在下发生的Pummerer重排反应，用重排产物ω-羟基-ω-甲硫基-(4′-苄氧基)-苯乙酮分别与尿素、氨基脲、氨基硫脲和邻苯二胺反应合成了2，4-咪唑啉-二酮、1，2，4-三嗪-3-酮、喹喔啉等含氮杂环化合物。

To produce the scientific evidence for developing and manufacturing new antitumor drugs.Methods: 1 The inhibitory effect on cell growth of Hela was measured by MTT assay in treated or untreated groups (3.125, 6.25, 12.5, 25, 50μg/ml TAM and control) for three different treatment times (24h, 48h and 72h).2 Apoptosis and cell cycle were measured by FCM in four experimental groups (0, 4, 16, 40μg/ml TAM) for 48h.3 Adopting Wright and Giemse's staining to observe the morphology of Hela cells which treated with 40μg/ml TAM.4 Using invasion experiment to detect the Hela cells'invasive abilities which treated with 40μg/ml TAM.5 The protein expressional levels of P-ERK, ERK, C-myc and Cyclin D1 in Hela cells untreated or treated with 4, 16, 40μg/ml TAM for 24h were measured by Western blot.6 Expression of anti-apoptotic gene bcl-2, apoptotic gene bax and MMP-9 in Hela cells of four experimental groups (0, 4, 16, 40μg/ml TAM for 24h), were observed by revers transcription PCR.7 The protein expression of P-ERK, ERK, Bcl-2 and Bax in Hela cells treated with 40μg/ml TAM for 24h observed by laser scanning microscopes.

1采用四甲基偶氮唑蓝法检测不同浓度北豆根总碱(3.125、6.25、12.5、25、50μg/ml)处理不同时间(24、48和72小时)对Hela细胞增殖反应的抑制作用。2采用流式细胞技术(flow cytometry，FCM)检测不同浓度北豆根总碱(0、4、16、40μg/ml)作用48小时，对Hela细胞凋亡及周期变化的影响。3瑞氏-姬姆萨染色后显微镜观察北豆根总碱(0、40μg/ml)作用24小时后Hela细胞形态学变化。4采用Transwell小室法检测北豆根总碱(0、40μg/ml)作用24小时后对Hela细胞侵袭性的影响。5采用免疫印迹方法检测不同浓度北豆根总碱(0、4、16、40μg/ml)作用24小时后，Hela细胞中磷酸化ERK、ERK、C-myc、CyclinD1的表达变化。6采用逆转录-聚合酶链反应(revers transcription PCR，RT-PCR)半定量检测北豆根总碱(0、4、16、40μg/ml)作用24小时，Hela细胞抗凋亡基因bcl-2、促凋亡基因bax、基质金属蛋白酶-9(MMP-9)的表达变化。7应用激光共聚焦显微镜(laser scanning microscope，LSM)观察北豆根总碱(0、40μg/ml)作用24小时后，Hela细胞内P-ERK、ERK、Bcl-2、Bax蛋白的表达变化。

The auxiliary can be recovered in high yield (81%) only by filtering and recrystallization. Besides, some other aldehydes have been chosen to test the enantioselectivity of N,N\'-dibenzyl tartamide, in comparison with two other allylaborates reagents developed previously by Roush and Brown, respectively. The results show that %e.e. of homoallylic alcohol is superior to that of the former, and approaches the Brown reagent.

产物经S_N2反应得瑞格列萘中间体-甲基烯丙基-2-氯苯基-叠氮甲烷(17)；同时，将筛选出的新型手性配体N-苄基酒石酸二酰胺用于其他几种醛(正丁醛，异戊醛和环己醛)的不对称烯丙基化反应，并与广泛应用的Roush配体(22)和Brown配体(27)相比较，发现其立体选择性优于Roush配体，并接近Brown配体，但明显具有可回收利用的优势。

The effects of lime dosage, microwave irradiation time and sensitizer on the removal of NH3-N were investigated.

采用微波辐照法处理氨氮废水，文章探讨了生石灰用量、微波辐照时间和敏化剂的加入对NH3-N去除率的影响，并做了水浴加热与微波辐照的对比实验。

We suggested that the sorption of P to soil minerals must to be taken into account in the future research.

结果建议，在研究P对土壤有机碳氮矿化过程时应充分考虑土壤对P的吸附作用。

Aiming at nitrogen and phosphorus removal in bioremediation of eutrophicated water body and deep treatment of sewage, Oscillatoria, Spirogyra, Hydrodictyon and Scenedesmus were immobilized on fibrous carrier forming immobilized algal films.

针对富营养化水体生物修复和污水深度处理氮磷的去除，将细颤藻、水绵、水网藻、栅裂藻固定在纤维填料上，形成固定化藻膜。

By azo compound became chromophore monomer disperse red -19, and through Sulfonyl of the compound was synthesized by the C, and through 1HNMR its structure was characterized, the results show that the synthesis of compounds C of very high purity, synthetic polymers can meet at the request of the monomer, but also of the compound D, through 1HNMR its characterization, showed that high purity compounds D, is expected to be functional after the adoption of To all the excellent performance PEEK electro-optic polymer materials.

本文通过偶氮化合成了生色团单体分散红-19，并通过磺酰化反应合成得到了化合物C，并通过核磁共振氢谱对其结构进行了表征，结果表明，所合成的化合物C的纯度非常高，完全能满足聚合物合成时对单体的要求，同时也合成了化合物D，通过核磁共振氢谱对其结构表征，显示化合物D纯度很高，应有望通过后功能化合成出各种性能优良的聚醚醚酮电光高分子材料。

The best application method is that 60% of silicon is used as based fertilizers, 40% of silicon as topdressing used in the eighth leaf.

现在硅肥已被国际土壤界列为继氮、磷、钾之后的第四大元素肥料，为全球农业及化肥业所重视[2]。

Nitrogen trifluoride (NF3) is a toxic, colorless, odorless , nonflammable, oxidizing compressed gas.

三氟化氮(NF3)是有毒、无色、无嗅、不可燃的氧化性压缩气体。

Any Party included in Annex I may use 200x as its base year for nitrogen trifluoride, hydrofluoroethers and perfluoropolyethers for the purposes of the calculation referred to in paragraph x above.

附件一所列任一缔约方，为以上第x款所指计算的目的，可使用200x年作为其三氟化氮、氢氟醚和全氟聚醚的基准年。

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。