生物合成

Part 4: Synthesis of (5α)-3-Hydroxy-18-Nor-C-Homo-13a-Azaandrostanes 1-Azabicyclo [5, 3, 0] decane (6) is a core skeleton of stemonine (7) and its derivatives, which are a group of bio-active natural products.

四、（5α）-3-羟基-18-nor-C-homo-13a-氮杂雄甾烷的合成 1-氮杂双环[5.3.0]癸烷(6)是天然产物百部生物碱(7)类分子的骨架结构，许多该类化合物都具有重要的生物活性。

The influence of additives on the detergency of biodegradable two-stroke oil was researched by engine bench tests.

研究了添加剂对以合成酯为基础油的生物降解二冲程汽油机油清净性的影响。

Some of them have been studied by X-ray diffraction technique, and their crystal structures are reported precisely.

近年来，人们对糖类化合物的合成方法、结构表征和生物活性进行了深入而广泛的研究。

Especially, it focuses on presenting the structure, spectroscopic character, light stability and dissolubility of Cy series.

本文探讨了生物荧光分析试剂Cy系列的合成研究，报告了该研究的思路和取得的成果。

The experimental study of CBAB implanted in muscle of rabbits. In order to study implanted CBAB's dynamic biomechanics strength, its affection on tissue around and the concentration of Ca and P in blood, and to obsreve whether ectopia osteogenesis occure or not, we implanted CBAB samples, which were compounded in the proportion of 1 g CPC powder to 5 mg BMP, into rabbits'thigh flexor.

为了研究CBAB植入动物体内对外周血钙、磷水平的影响、CBAB的动态生物力学强度变化和生物学行为，为进一步进行CBAB用于骨填充的研究和应用提供理论基础和方法积累，按1 g CPC固相配5 mg rhBMP-2的配比将CPC与rhBMP-2复合成CBAB，经手术植入于兔大腿屈肌中。

At these nadirs, chemosynthesis—the thermal and chemical energy given off by deep-sea vents—gives life to creatures like the eelpout fish and tube worms pictured here.

在这些最低点，化学合成，热和化学能给予在深海排气口之外，让生命的生物像粘鱼之类和管蠕虫拍到这里。

Lots of data showed that in Taxus cells, fungal elicitor treatment was a most effective method to enhance taxol production, which however was unstable.

大量的研究表明，生物诱导子处理是提高细胞合成紫杉醇最有效的方法之一。但是尚存在紫杉醇产量不稳定的问题。

How do the characteristics of the eukaryotic rna polymerases differ in terms of their cellular location and products?

真核生物的三种rna聚合酶在细胞中的定位、合成的产物各具有怎样的特征？

Description: The bioactive factors can rapidly eliminate allergy, soothe the skin, improve the immunity of skin, repair damaged skin, promote the collagen synthesis of fibrocyte of skin tissue, improve the blood circulation of skin tissue, and reduce the release of cell histamine of skin. They have the efficacy of desensitization, can replenish water and nutrients, and add a natural barrier to sensitive skin.

产品说明：通过生物活性因子快速消除过敏现象，舒缓镇静皮肤，提升肌肤免疫力、修复受损细胞，促进皮肤组织纤维细胞的胶原合成，改善皮肤组织的血液循环并减少皮肤细胞胺释放，脱敏同时大量补充肌肤水份及营养给敏感性肌肤增加一道天然屏障。

Zhengzhou Rip is a professional engaged in food nutrition fortifier, tobacco additives, pharmaceutical raw materials of research, production, operating as one of the high-tech enterprises, the company owns in the test, the fermentation workshop, synthesis workshop, refining workshop, Compound workshop, GMP workshop and so on, first-class production equipment, product testing facilities and perfect detection means.

郑州瑞普生物工程有限公司是一家专业从事食品营养强化剂、烟草添加剂、医药原辅料的研究、生产、经营为一体的高新技术企业，公司拥有中试车间、发酵车间、合成车间、精制车间、复配车间、GMP车间等，生产设备一流，产品检验设施齐全，检测手段完善。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。