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In this paper, twenty novel meso-substituted porphyrins of four series were designed and synthesized by increasing the conjugation of porphyrins or introducing substituents with high fluorescence quantum yield into the meso-position of porphine, and then red OLEDs were fabricated by doping porphyrins into a suitable host using ten porphyrins compounds and their electrolumin -escence properties were tested. The main contents and results were generalized as follows:Three meso-tetrakisporphyrins 4a-c and three conjugations of porphine-triarylamine linked by styrene 10a-c were synthesized and characterized by 1H NMR, MS, UV-vis spectra and fluorescence emission spectra.

本文通过增大卟啉分子的共轭结构或将具有高荧光量子产率的基团连接到卟吩环的中位得到了四类共20个新型的卟啉化合物，并选取其中10个化合物制备有机发光器件来考察材料的电致发光性能，具体内容包括以下几个部分：设计合成了3个中位直接被三芳胺取代的卟啉化合物4a-c和3个通过苯乙烯连接的卟吩-三芳胺共轭体10a-c，通过核磁氢谱、质谱、紫外吸收光谱和荧光发射光谱表征了新化合物的结构。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。

Abstract］Objective To investigate the relevant factors of ectopic pregnancy and treatments and reveal causes of the increasing incidence.It could provide theoretical instruction about postabortal announcements and the choice of method of contraception.

目的 探讨异位妊娠诊断、发病相关因素及治疗方法，有助于进一步明确异位妊娠发病率增加的原因，并为宣教流产后的注意事项和避孕方法的选择提供理论指导。

Using a drill with an increasing diameter up to 2.5 mm, an oblique bone tunnel is created,starting from the posteroinferior angle of the base of the metacarpal and ending on the other side at the level of the metaphysis, going in the direction of the second metacarpal Fig.

由掌骨基底部后下方开始，到干骺端，用以直径不超过2.5mm骨钻作一倾斜骨道，朝向第二掌骨方向（图1）。

Potamogeton malialaianus was the dominant species of submerged plants in , but the rate of swamp forming is more rapidly due to the increasing sedimentation and rapid growing of emerging plant and leaf - floating plant after .

高等水生植物在50年代以马来眼子菜为主，但进入90年代后，随着挺水植物，浮叶植物的逐步扩展，沉水植物的覆盖率和生物量日益降低，湖底的淤积和部分湖区沼泽化的进程加快。

In order to carry out praedial master plan efficiently, it's necessary to analyse and control existing land utilization. Our first task is to take advantage of arable land. Along with expanding economy, the increasing of population, the faster infrastructure construction and unceasing development of countryside, the demand of land is higher and higher. It made a big stress for the limited land resource.

为了搞好土地的总体规划工作，必须掌握现有的土地利用现状，对目前的土地利用状况做出分析评价，耕地的合理利用是我们当今的首要任务，随着经济的发展、人口的增多，基础设施建设的加快以及城镇的不断拓展，对土地的需求愈来愈大，这就给十分有限的耕地资源造成了巨大的压力。

The experiment research indicates: contrasting with thecontrol groups, Bushen Huoxue Huatan Prescription has the following functions: 1. improving the praxiology function of model rats, 2. improving the activity in cholineacetyl-transferase in hippocampus tissue, 3. increasing the expression of NOS in hippocampus region of cortex, 4. promoting the expression of the synapse P3, in hippocampus region of cortex, 5. reducing obviously the apoptosis number of brain nerve cell .

实验研究表明：与对照组比较，补肾活血化痰方具有：1、改善动物行为学功能；2、提高海马组织胆碱乙酰转移酶活性；3、增加皮质及海马区一氧化氮合酶的表达；4、促进皮质海马区突触素蛋白P_(38的表达；5、显著降低脑神经细胞的凋亡数目。

Moving from precontemplation, contemplation to preparation, the mean score of every process of change associated with cognitive activities, and of the cons of smoking pactice were increasing; the mean score of every process of change associated with behavior activities remained stable, but the mean score of every situational temptation, and of the process of smoking practice were declining.

各阶段决策平衡、自我效能感和与认知有关的转变方法均分差异有统计学意义；由前意向期→意向期→准备期，吸烟有害的决定均分和各项认知相关转变方法均分逐步抬高，情境诱惑和吸烟有利决定均分逐渐降低，行为相关转变方法均分保持稳定。

In the Stirling piston engine, the regenerator is a temporary heat storage aimed at increasing "thermal efficiency" with free-energy preheating and precooling.

在活塞的斯特林发动机，再生器是一个临时储热预冷旨在提高能源预热和&热效率&与自由。

The results indicated as below: 1.The total latent infection rate and infection rate of two major fungi(Alternaria alternata and Fusarium sp)was reduced effectively with preharvest BTH treatment . The latent infection rate decreased with increasing of spraying times.Results showed that the four times of treatment by BTH is the best.

结果表明： 1。采前BTH处理有效地降低了果实生长发育期间的总潜伏侵染率及两种优势病原菌(Alternaria alternata和Fusarium sp)的潜伏侵染率，控制效果随处理次数的增加而提高，以100mg/L BTH处理4次效果最好。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。