查询词典 first-order reaction

Results: NKA-I cells was first found in the duodenum mucose on the 14th day of fetus, earlier than in the jejunum ( 16th day ) and ileum ( 17th day ), and its Positive reaction and the number of cells increased with further development, after birth the 30th day, it became quite identical to that of adult rat; NKA-I cells were seen in the colon mucosa on the 17th day of fetus, later on the number kept decreasing till grown up stage; No change was observed in the stomach mucosa except that few cells showed up on the 15th day of fetus; No positive cell was found on the oesphagus wall.

结果： NKA-I细胞首先见于胚胎14 d的十二指肠粘膜，早于空肠(胚胎16 d)和回肠(胚胎17 d)，其阳性反应强度及细胞量随发育而增加，30 d时与成年鼠相似；结肠粘膜内于胚胎17 d见细胞，但此后数量较少直至成年；胃粘膜于胚胎15 d见个别细胞外，以后无明显变化；食道壁始终未见阳性细胞。

Results: NKA-I cells was first found in the duodenum mucose on the 14th day of fetus, earlier than in the jejunum ( 16th day ) and ileum ( 17th day ), and its Positive reaction and the number of cells increased with further development, after birth the 30th day, it became quite identical to that of adult rat; NKA-I cells were seen in the colon mucosa on the 17th day of fetus, later on the number kept decreasing till grown up stage; No change was observed in the stomach mucosa except that few cells showed up on the 15th day of fetus; No positive cell was found on the oesphagus wall.

结果：NKA-I细胞首先见于胚胎14 d的十二指肠粘膜，早于空肠(胚胎16 d)和回肠(胚胎17 d)，其阳性反应强度及细胞数量随发育而增加，30 d时与成年鼠相似；结肠粘膜内于胚胎17 d见多个细胞，但此后数量较少直至成年；胃粘膜于胚胎15 d见个别细胞外，以后无明显变化；食道壁始终未见阳性细胞。

Three part of research works had been carried out in the dissertation. The first part: a kind of multidentate amine modified silica gel was synthesized through the following steps:(1) introduce the amino groups onto the surface of silica-gel by the treatment of surface silanol groups withγ-aminopropyl trimethoxy silane;(2) michael addition of excess trihydroxymethyl propyl triacrylate to amino groups on the silica gel surface;(3) amidation of the unreacted double bonds of TMPTA on the surface of TMPTA modified silica gel with diethylenetriamine;(4) the multidentate amine modified silica gel was finally obtained by the reaction of amino groups on the surface of DETA modified silica gel with double bond of butyl acrylate.

本论文进行了三部分研究工作，第一部分：通过多步反应对硅胶进行改性合成了一种多齿胺改性硅胶配体，合成过程如下：1通过γ-氨丙基三甲氧基硅烷与硅胶表面的硅羟基反应，使硅胶表面带有氨基；2利用硅胶表面氨基与过量的三羟甲基丙烷三丙烯酸酯发生Michael加成反应；3利用二乙烯三胺与TMPTA改性硅胶表面未反应的双键发生反应使硅胶表面氨基化；4最后用丙烯酸正丁酯与DETA改性硅胶表面氨基充分反应成功合多齿胺改性硅胶配体。

Nair (it's a hair removal cream): it's smelly and you run the risk of getting a chemical burn. If you do try this, be sure to test it on a small patch of skin on your arm or your leg first. That way, if you do have a reaction, you won't have a mark on your face and it'll be less noticeable.

使用Nair产品：它有一股臭味，而且有化学灼伤的危险，如果你硬要试的话，那就请务必在胳膊或腿部的一小块皮肤上试用，那样你如果有反应的话，就不会在你脸上留下伤痕，它也不会显眼。

But the effluent ammonium in the anoxic reactor, where enough NO2 were present, was equal to the blank system, and no ammonium was converted to such nitrogen compounds as NO2- and N2 by Nitrosomonas eutropha using NO2 as electron acceptor, which maybe caused by lack of the function bacteria. There were two ANAMMOX reaction pathways in the one-stage autotrophic nitrogen removal system. One way was that after part of NH4+ was oxidized to NH2OH under aerobic conditions, NH2OH and NO2- were converted to N2O under anaerobic conditions, at last N2O was further converted to N2 which realized the nitrogen removal; Another way was that at first NO2- was reduced to NH2OH, NH2OH reacted with NH4+ to form N2H4, which was further converted to N2 subsequently, realizing the nitrogen removal.

结果表明：单级自养脱氮系统内6.72%的氨氮是通过吹脱等物化作用去除的，不超过6.02%的氨氮是通过传统硝化反硝化途径去除的，87.26%左右的氨氮是由自养脱氮途径去除的，自养脱氮反应起主要脱氮作用；在足够NO2存在且缺氧的条件下，单级自养脱氮系统内的出水氨氮浓度与空白反应器相当，NH4+并没有被亚硝化单胞菌以NO2为电子受体氧化为NO2-和N2等化合物而得以去除，可能是因为系统内不存在该代谢功能的亚硝化功能菌；单级自养脱氮系统内存在两条ANAMMOX反应途径：其中一条途径即NH4+在好氧条件下被氧化为NH2OH后，生成的NH2OH与系统内的NO2-在缺氧条件下被转化为N2O，N2O则进一步被转化为N2而实现氮的去除；另外一条途径即NO2-首先被还原为NH2OH，生成的NH2OH则与系统内的NH4+反应生成N2H4，N2H4继续被转化为N2而实现氮的去除。

The principal development of the study on chemical conversion of nitrogroup derivatives for the toluene was summarized at first based on this review,Described herewith are reaction mechanisms and effects substituents and concluded four methods about sclcctive oxidation of nitrotoluene.

文摘：在这篇文章中，首先综述了甲苯硝基衍生物研究的进展，根据这一评论详细地说明了化学转化机理和取代基效应，并对硝基甲苯的选择性氧化进行了简单评述。

The intercalation reaction of nonaromatic heterocyclic compound hexahydropyridine into α-ZrP was reported for the first time.

磷酸氢锆α-Zr(HPO4)2.H2O是一类典型的层状结构的多功能材料，本文首次报道了非芳香杂环化合物六氢吡啶对α-ZrP的插层反应。

Many years ago, it have been noticed that, not all injurise of heart cell were directly proportional to the inflammatary reaction, and this kind of noninflammatory damage may be apoptosis. Kawano has verified first time in 1994 that, the onset and development of VMC accompanied the apoptosis, and the apoptosis probably are significant mechanism from VMC to the dilated cardiomyopathy.

早有人注意到，VMC时心肌损伤并不都与炎症反应成正比，其存在的非炎症性损伤很可能是细胞凋亡。1994年Kawano等首次证实心肌炎伴有心肌细胞凋亡，后者可能是心肌炎发展成扩张型心肌病的重要机制。

Our first paper is a theoretical treatment, from a geochemical perspective, of how the sophisticated machinery doing this reaction may have arisen, what precursor chemistries may have been used, and what evolutionary steps occurred to get to oxygenic photosynthesis.

我们的第一篇文章是从地球化学的角度，在理论上分析光合作用的复杂机制的可能成因，其中使用了什么前体化学物，以及产氧的光合作用的进化途径。

We found out one kind of new orange-red long afterglow material La2O2S: Eu3+, Mg, Zr.2 In the phosphor Gd2O2S, Mg, Ti which was prepared by high-temperature solid-state method, the orange afterglow phenomenon can be seen after illuminated with UV light.3 Using the high-temperature solid-state method, Gadolinium oxysulfide phosphors doped with rare earth ions were synthesized. We can observe the red or orange phosphorescence in Gd2O2S doped with Eu3+, Sm3+, Tm3+, Yb3+, Dy3+, Er3+, Nd3+or Ho3+. This is a new result of the long afterglow phosphors research.4 Using the microwave radiation method, the new Sm3+ doped gadolinium oxysulfide phosphor, which has the orange-red long afterglow emission after illuminated with UV light or visible light, was synthesized for the first time.5 In fluorescent materials YOX doped with europium ions, the long afterglow phenomenon wasnt observed but the blue luminescence of Eu2+ and red luminescence of Eu3+ are simultaneously examined. This is a new result of the valence stability and change of Eu2+ in yttrium oxyhalide .We systematically studied the effects of the host, addition agents and reaction atmosphere on the valence change and fluorescence property of europium ions.

经过系统的研究总结得到以下的结论与成果： 1采用高温固相反应法合成了一系列稀土离子掺杂的硫氧化镧发光粉，发现了该体系中Eu~(3+)的长余辉发光，从而得到一种迄今未见文献报道的红色长余辉发光材料：La_2O_2S：Eu~(3+)，Mg，Zr； 2在Gd_2O_2S，Mg，Ti磷光粉中观察到橙色的长余辉发光现象； 3采用高温固相反应法合成了一系列稀土离子掺杂的硫氧化钆磷光粉，在掺杂Eu~(3+)、Sm~(3+)、Tm~(3+)、Yb~(3+)、Dy~(3+)、Er~(3+)、Nd~(3+)、Ho~(3+)的Gd_2O_2S中观察到红色和橙色长余辉发光； 4首次采用微波法合成了Gd_2O_2S：Sm~(3+)，Mg，Ti磷光粉，该磷光粉经紫外或可见光激发后呈现明显的橙红色长余辉发光； 5在YOX中同时观察到Eu~(2+)和Eu~(3+)的发射，系统研究了基质、添加剂及反应气氛对Eu价态和发光的影响。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。