四对的

Seven of them have not been reported.Their structures were confirmed by IR,~1HNMR,MS,and element analysis. 4.Meanwhile,the green methylation procedure of imides was developed by using dimethyl carbonate as methylation reagent.A series of imides,for example,phthalimide,3,4-dibromo-maleimide and succincide were used for substrates.The effects of DABCO(1,4-diazabicyclo [2.2.2]octane)and DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)as a catalyst in this kind of reactions were investigated.2-Bromo-3-(1-methylindolyl-3-yl)-1-methyl-1H-pyrrole-2,5-dione was prepared by using dimethyl carbonate,which further expanded the use of dimethyl carbonate,as a green agent in organic synthesis.

在以硫酸二甲酯为甲基化试剂对3，4-二溴马来酰亚胺进行N-甲基化反应合成3，4-二溴-N-甲基马来酰亚胺的同时，以碳酸二甲酯为甲基化试剂，对3，4-二溴马来酰亚胺、邻苯二甲酰亚胺、琥珀酰亚胺等酰亚胺类化合物的N-甲基化反应进行了研究；考察了1，4-二氮杂双环[2.2.2]辛烷，1，8-二氮杂双环[5.4.0]十一碳-7-烯、碳酸钾和四丁基溴化铵等作为催化剂对碳酸二甲酯N-甲基化反应的反应时间和收率等的影响，并应用碳酸二甲酯为甲基化试剂，合成了N-甲基-3-溴-4-(1-甲基-吲哚-3)-马来酰亚胺。

In the present study, the autotetraploid rice IR36-4X was treated with ion implantation technique by nitrogen ion beams and a polyembryonic seedling mutant (named as the IR36-Shuang) was identified in M2 generation. The mutant line was systematically investigated about the location of seedling in polyembryonic seedling, and the cytological initiation of the additional embryo in the 1R36-Shuang was observed and determined.

以低能氮离子束为诱变源，通过对同源四倍体水稻品系&IR36-4X&进行离子注入后在其第2代群体内筛选得到了1株具有多胚苗性状特征的突变株（IR36-双），对该突变株后代的多胚苗形态特征及其多胚来源进行了研究。

Error analysis In order to analysis the pose error of the hexapod machine tool, considering the characteristics of the parallel mechanism,"analysis on the error prominency factors for the hexapod machine tool pose error"is proposed. Numerically, the error prominency factor can express the influence on the pose error of the tool resulted from the mechanism parameter error within the whole workspace.

四、位姿误差分析为了定量地对并联机器人机床位姿误差进行分析，结合并联机构的特点，首次提出了&并联机器人机床位姿误差放大因子分析法&，因位姿误差放大因子是反映机床机构参数误差对刀具末端误差影响大小的机床工作空间内的统计值，因此既可作为机床结构参数精度设计的依据又可对机构参数进行优化。

Effect of regional CTLA4Ig gene transfection on the rejectiveresponsiveness of small bowel recipients in ratsObjective: To evaluate the local expression of CTLA4Ig gene in smallbowels and its action on the rejective responsiveness of small bowelrecipients in rats.

四、移植肠局部C TLA4Ig转基因对受体免疚排斥反应的影响目的：研究CTLA4Ig基因在小肠局部转染表达及其表达产物对受体免疚排斥反应的影响。

Resultantly, the individual warm/cold events in ENSO cycle appear to be partially locked to the annual cycle, and also exhibit obvious irregularity both in amplitude and in lasting time.

本文第四章研制设计了一包含海洋表面边界层和大气辐合反馈过程的热带太平洋海气耦合异常模式，进而利用该模式对ENSO循环进行了较为真实的模拟，通过对模式ENSO循环的演变特征及其形成机制的细致分析，建立了-ENSO循环的非线性分析模式，并提出了ENSO循环形成的一种更为客观的理论，指出：1）和观测事实类似，模式ENSO循环确实涉及了三种主要时间尺度过程即LF、QB和AC，其中LF为3-4年主周期振荡，QB占总方差10～20%；2）ENSO循环的正反馈机制是不稳定海气相互作用过程，且这一不稳定过程的发展在暖态中明显强于冷态；3）ENSO循环的负反馈机制在冷暖态中表现不同，在冷态消亡过程中，这种负反馈过程主要表现为西边界反射产生的时滞效应，但在暖态消亡过程中不存在类似的时滞效应，其负反馈过程主要表现为在海气耦合不稳定充分发展时伴随的赤道两侧冷水上翻过程的加强以及非线性过程的衰减作用抑制了不稳定的发展并最终使得系统回复至冷态；4）ENSO循环的3-4年主周期振荡是一非线性系统的自激振荡现象，其形成是线性系统的本征模即准两年振荡通过非线性机制产生的周期加倍所致，其中&单向性&大气辐合反馈加热过程对其形成至关重要；5）虽然年循环过程对ENSO循环形成没有本质影响，但它可明显影响ENSO循环的具体振幅和位相，使得ENSO对季节循环有明显的&锁相&特征，并且也使得ENSO循环在振幅大小和时间长短方面呈现出明显的不规则性。

The third and fourth chaptersfocused on the collection, sortation and induction of materials about the modern serviceindustry of Tianjin. By the analysis and compare in the history and facts aspects, we point outthe features and lacks to develop modern service industry, and analyze the policy environmentand advantages. This paper gaves some suggests about to promote the developing of modernservice industry for Tianjin.

第三、四章注重对天津市现代服务业相关资料进行搜集、整理和归纳，通过对其发展历史、现状进行纵向分析和横向比较，指出现代服务业发展的差距和不足，并分析政策环境和优势条件，提出促进天津市现代服务业发展的政策建议。

Seven inactivated tetravalent vaccines of Riemerella anatipestifer,of which three (1#,3#,7#) employed oil-emulsion,two(4#,6#) employed propolis,two(8#,10#) employed aluminum hydroxide as their basic adjuvants,were developed and compared by the methods as follows:challenges were performed by homologous virulent RA strains to measure their protective abilities;indirect enzyme-linked immunosorbent assay was used to monitor antibody production;lymphocyte transformation test was performed to study the expression of cell-mediated immunity.

本实验通过对供试鸭的攻毒保护试验、通过用ELISA方法对供试鸭特异性抗体消长规律的研究以及通过用~3H-TdR掺入法对供试鸭T细胞免疫水平的检测三个方面对所研制的七种不同佐剂类型的鸭疫里氏杆菌四价灭活苗的免疫原性进行了比较研究。

The contraction force of femoral que adriceps muscle and the action force of tibiofemoral joint were applied to the knee joint with intact ACL and then with amputated ACL, and the anteroposterior displacement and rotation angle of the knee joints were measured with strain measurement tech nique and reconstructed the image with computer image processing technique.

方法标本取自新鲜尸体的5只膝关节，分别在ACL完整和切断的情况下对标本施加股四头肌力和腔股关节作用力，采用应变计测量技术和计算机图形处理技术对受载膝关节位移和转角进行测量和图像重建。

The experimental diet with glutamine (10 g/kg), or with lactitol (3 g/kg), or with tributyrin (5 g/kg), or with lactitol (3 g/kg) plus tributyrin (5 g/kg), the aim is to determined effects of several several substances and compound on early weaned piglets.

整个试验分为以下四个部分： 1 几种物质对早期断奶仔猪生长性能的影响在断奶当天、断奶后7天、14天、21天及28天分别对仔猪进行称重，观测猪只的平均日增重、日采食量、料重比及腹泻率。

A phosphorus-containing triazine oligomer was synthesized from triethyl phosphite, cyanuric chloride ,pentaerythritol and morpholine through three steps.

以亚磷酸三乙酯、三聚氰氯、季戊四醇和吗啉为原料，经3步反应合成了含磷三嗪环低聚物，考察了反应条件对中间体及产物收率的影响，对中间体及产物的结构和热性能进行了表征。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。