查询词典 nitro-pentaerythrite

Objective To study the effect of nitric oxide synthase inhibitor N-nitro-L-arginine methyl ester on extinction of cued fear.

目的 探讨一氧化氮合酶抑制剂N-硝基－L-精氨酸甲酯对大鼠线索性恐惧消退的影响。

Methods: The N-methyl-N-nitro-N-nitroso-guanidine transformed eternalized human gastric mucosa epithelium GES-1 cell line was used in vitro as a model of gastric precancerous lesion. The medicated canine serum was prepared by feeding to the adult Beagle dog with Radix notoginseng extracts and obtaining the serum after 2-hour medication. MC cells were cultured with medicated canine serum or non-medicated canine serum for 72 hours.

采用被N-甲基－N'-硝基－N-亚硝基胍(N-methyl-N'-nitroso-guanidine， MNNG)转化后的永生化人胃黏膜上皮细胞系GES-1细胞作为胃癌前病变细胞的体外研究模型，用三七提取物一次性灌胃彼格犬，取给药后2h的血清作为实验药物血清。

The results show that Pd/CNTs catalyst has good quality for the hydrogenation of halogenated aromatic nitro compounds.

同时，对影响催化反应的条件进行了研究。

This novel catalyst was successfully used in the selective hydrogenation of halogenated aromatic nitro compounds.

作为加氢催化剂，Pd/CNTs对卤代硝基物的催化加氢表现出较高的催化性能，其加氢活性比P出C加氢催化剂高。

The results show that the linker length has no influence on the intercalating activities and the nitro-containing parent compound has strong DNA-cleaving activities.

通过对DNA嵌入常数Ka和切断活性的测定，观察到连接臂长短对嵌入作用没有明显影响，含硝基化合物具有较强的DNA切断作用。

Testing of paints, varnishes and similar products; determination of nitro cellulose content of lacquers

涂料的检验。漆中硝化棉含量的测定

Yet as we trundled into the forest, my lead dogs, Nitro and Isabella, showed an unusual interest in goofing off.

但当我们慢慢走入森林时，我的领头狗尼特罗和伊沙贝拉出乎意料地很想打混。

In this article,a non-carcinogenic dye intermediate 4-aminodianiline-2-sulfonic acid is synthesized from 4-nitro-1-chlorobenzen through sulfonation,condensation and reduction.

针对联苯胺作为合成染料的重要中间体已被确认为致癌物的情况，以对硝基氯苯为原料，经磺化、缩合、还原，合成了一种无致癌性并取代联苯胺的双胺化合物染料中间体4-氨基二苯胺-2-磺酸，利用红外光谱、差热和氢谱核磁对其性质进行了表征。

The application, proposed hydrotalcite-like compounds as a new type of environmentally friendly solid catalysts in the aldol condensation, nitrile hydrolysis, epoxide ring-opening reaction of the oxidation of aromatic compounds, alcohols oxidation, reduction of nitro compounds, and many other important reactions in organic synthesis has an important application potential, and with little pollution compared to conventional catalysts, easy separation of advantages of high reactivity.

叙述了水滑石类化合物作为固体酸碱催化剂、氧化还原反应催化剂、催化剂载体等方面的应用情况，提出了水滑石类化合物作为一类新型的环境友好的固体催化剂，在醇醛缩合、腈类水解、环氧化物的开环反应、芳烃类化合物的氧化、醇类氧化、硝基化合物的还原等许多重要的有机合成反应具有重要的应用前景，并且与传统催化剂相比具有污染小、易分离、反应活性高等优点。

We have synthesized 4,4'-dinitro-3 4''-dimethyl triphenylamine,(1), in 84% yield in an one-step condensation process between 3,4-dimethyl aniline and 4-fluoro-nitrobenzene. After the auto-oxidation of (1) and the subsequent hydrogenation of the nitro-groups, an AB2 type triphenylamine polyimide intermediate bearing two amine groups and one acid-anhydride group each on individual phenyl ring,{AB2 PI Intermediate}, was prepared successfully. The yields of the autoxidation and the hydrogenation steps are 81% and 90% respectively.

中文摘要本研究以3，4-二甲苯胺及4-氟硝基苯为原料，经一步骤缩合反应得到产率为84 %之4，4'-二硝基-3&，4&-二甲基三苯胺(1)，由(1)经自氧化法后再以氢化法还原硝基，成功地制备出带有二胺基与一羧基的三官能基之AB2型三苯胺中间体(AB2型PI中间体)，自氧化反应与氢化法的产率各为81%及90%。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。