活性碳

The results show that after partial substitution of La3+ with Sr2+ the oxygen vacancy concentration incre...

结果表明，Sr2+部分取代La3+，催化剂表面氧空位浓度增加，同时形成B3+-B4+共存体系，催化剂对碳颗粒和NOx催化活性显著提高。

Al and SiC powders were chosen as active filler and inert filler, respectively, for the fabrication of preceramic-derived multi-phased ceramics, using polycarbosilane as preceramic precursor.

采用微米级Al粉作为活性填料， SiC微粉作为惰性填料，聚碳硅烷作为陶瓷前驱体制备SiC基复相陶瓷。

Al and SiC powders were chosen as active filler and inert filler,respectively,for the fab- rication of preceramic-derived multi-phased ceramics,using polycarbosilane as preceramic precursor.

采用微米级Al粉作为活性填料，SiC微粉作为惰性填料，聚碳硅烷作为陶瓷前驱体制备SiC基复相陶瓷。

In other words, replacement of the number 8 carbon by nitrogen in the purine ring does not eliminate activity

换句话说，嘌呤环上第8位碳被氮所取代并不丧失活性。

The results showed that nitrate reductase activity was influenced by different carbon source.

结果显示，不同碳源种类对菌株硝酸还原酶活性有明显影响。

Functinal complementation test showed that trehalose-6-phosphate synthase mutant (tps1△), transformed by the open reading frame of SpTPS1 gene, restored growth on the mediam supplemented with glucose as a sole carbon source. This result indicated that trehalose-6-phosphate synthase gene (SpTPS1) of Selaginella pulvinata has biologically activity and is hopful to be applied to transgeneic improvement of plant for abiotic stress tolerance.

酵母功能互补试验证明，用SpTPS1基因开放阅读框转化的海藻糖合成酶基因突变（tps1△）酵母菌株，可恢复在以葡萄糖作为唯一碳源培养基上的生长，说明垫状巻柏海藻糖-6-磷酸合成酶基因SpTPS1具有生物活性，可能应用于植物抗逆性的转基因改良。

The main chain and side chain have different effects on the surface properties.

研究了多烷基苯磺酸钠的结构，特别是侧链碳原子数的增加，对其表面活性的影响，并与其它烷基苯磺酸钠进行了比较。

During these years (1997-2000) in the research area of annonaceous acetogenins 5 natural products and a number of chiral-pure analogs of annonaceous acetogenins have been synthesized using sugars as the starting materials. Their high activity and selectivity against cell line of colon tumor and a relationship between activity and configuration have been found too. In the respect of inhibitor of sialidase two new methodologies for the synthesis of chiral-pure 3-deoxy-ulosonic acid using hetero-Diels-Alder reaction or asymmetric propargylation as the key reaction were developed. On the topic of anti-leukemia marine natural product clavulactone a synthetic method based on the free radical cyclization and starting from sugar has been developed. In other title of PKC inhibited agent sphingosine a new synthetic route with SN2' as the key reaction has also been disclosed.

项目期间（1997-2000）在番荔枝内酯方面从糖出发合成了五个天然产物和一批手性纯的类似物，它们对肠癌细胞有很高的活性和选择性，并与构型有关；在唾液酸酶抑制剂方面发展了二类全新手性纯高碳糖的合成方法－杂原子D－A反应或丙炔基不对称加成为关键的反应；抗白血病海洋天然产物群柱虫内酯方面研究了由糖出发和自由基环化反应的合成方法；对PKC 起抑制作用的鞘氨醇方面也开创了新的合成途径－由糖出发并以SN2'反应为关键反应。

Progress in research of catalyst deactivation in ethylbenzene dehydrogenation was reviewed.Active phase of the catalyst was briefly analyzed.Five main reasons for the catalyst deactivation were discussed,including coke deposition,loss and redistribution of potassium promoter,change in oxidation state of iron,structural transformation of the catalyst,and the catalyst poisoning.

对乙苯脱氢制苯乙烯催化剂失活的研究进展进行了综述，分析了催化剂的活性相，分别探讨了积碳、钾的流失与重新分布、Fe3+的还原、催化剂物理结构的变化和中毒等5个因素对催化剂失活的影响及其失活机理，其中，钾的流失和Fe3+的还原是造成催化剂失活的重要因素。

The in vitro anticoagulation activity of the sample was evaluated by activated partial thromboplastin time, prothrombin time and thrombin time.

采用部分凝血活酶时间、凝血酶原时间和凝血酶时间对其体外抗凝血活性作了初步的评价，发现制备的大孔氮化碳对血液不会造成促凝，说明其可能成为一种新的血液相容性材料。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。