生物合成

It is shown that the porous particles are less energyconsuming to fluidize and, with their contents varying from 5%～25% in the riser, the minimum fluidization velocities based on gas stream are from 0.87×10-3 m/s to 2.2×10-3 m/s, while the critical transport velocities are from 1.0×10-2 m/s to 1.6×10-2 m/s for the operation with no liquid circulation or from 5.2×10-3 m/s to 7.1×10-3 m/s for the condition with liquid circulation.

例如，流化床电极、造粒、砂滤、结晶、浮选、聚合、煤气化、费-托合成[1]等。废水处理中三相流化床的应用得益于生物工程中的生物膜法和化工操作中的流态化技术的成功结合，主要优点为宏观混合程度高，固相内扩散阻力低，液体和固体外部传质阻力小，微生物浓度高。

Therefore it is very necessary and of great importance in environmental protection and economy to study the industrially production method of 3-hydroxybutyric acid.

生物降解塑料的开发是解决"白色污染"的有效途径，3-羟基丁酸是制备生物降解塑料的重要原料之一，且目前尚无规模化的工业生产，故研究3-羟基丁酸的工业化合成方法具有重要的环境意义和经济意义。

The applications of oxime compounds in recent years to agriculture were reviewed according to different chemical structures. The developing trends and broad application prospects of oxime compounds were also introduced.

按照不同的生物活性和结构进行分类，对近年来肟类化合物在农业中应用作了综述，著重从分子合成和生物活性进行讨论，并对它的发展趋势、应用前景作了进一步展望。

From this study, it could be inferred that by connecting different bio-functional molecules to the MB, we can endue the compounds both abilities of bio-functional molecules and MB, which were the recognize ability and the super paramagnetism.

此研究还表明：将不同的生物功能基团连接到合成的磁性颗粒上，赋予其生物大分子的识别特性和磁性颗粒的磁性。

It is found in all photosynthetic cells of plants and protoctists but not in photosynthetic prokaryotes.

存在于所有的植物和原生生物的光合细胞中，但在能进行光能合成的原核生物中却不存在。

Exxon is joining a biotech company, Synthetic Genomics Inc., to research and develop next-generation biofuels produced from sunlight, water and waste carbon dioxide by photosynthetic pond scum.

埃克森美孚和生物技术公司合成基因组学公司联手，以研究和开发下一代由太阳光，水和光合塘泥废物二氧化碳生产的生物燃料。

Progress in cloning techniques, microbiology and protein purification has been supplying an ever-growing number and quantity of preparatively useful biocatalysts. Initially enzymes were only used to synthesize compounds found in nature.

近年来人们在克隆技术，微生物学以及蛋白纯化方面的研究成果为我们提供了越来越多的生物催化剂，酶最初用于天然产物的合成，而今其在非天然化合物中的应用更引起了生物化学家的广泛关注。

Currently activities involve (1) Investigation of dye-DNA interaction by using spectroscopic methods to probe the binding sites between chromophore and DNA and to identify various DNA conformational structures, particularly the telomeric DNA;(2) Investigation of the structure-activity correlation of anti-telomerase agents;(3) Design and synthesis new compounds for antitumor agents and fluorescence biomarkers;(4) Monitoring the folding and unfolding of quadruplex structure, tracing the pathway of drug delivery and probing drug-target interaction by using single molecule microscopy and spectroscopy.

目前 的研究重点分别是(1)利用光谱方法探讨探针分子与DNA的交互作用，特别是作用位置与结构变化；(2)研究抗端粒酵素作用分子之结构与生物活性之关系；(3)设计及合成抗肿瘤药剂或萤光生物标记；(4)建立单分子萤光光谱与影像技术，研究 DNA的多变型结构之变化机制，监测药物输送的路径过程及其在细胞中与标的物的作用。

As the precursor of sphingolipids, sphingosine is one of important constituents of cell membranes.

鞘氨醇是生物体内合成鞘脂的母体化合物，是生物膜中的重要组分之一。

In the study, N4 -acetyl-sulfamethazine(N4 -ACE-SM2) was synthesized, the determination method of sulfamethazine(SM2) and N4-ACE-SM2 in sturgeon muscle and water were developed, bioconcentration and depuration of SM2 in the sturgeon were completed at last.

本研究合成了磺胺二甲嘧啶(SM_2)的主要代谢产物N~4-乙酰化磺胺二甲嘧啶(N~4-ACE-SM_2)，并建立了SM_2和N~4-ACE-SM_2在鲟鱼肌肉和水中的检测方法，进一步利用流水式鱼类试验，对SM_2在鲟鱼体内的生物富集和生物清除进行了研究。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。