中间体

Improving the quality of the gulonic acid which is a intermediate of vitamin c , is important to the inter-quality of vitamin c.

古龙酸作为维生素C生产中的重要中间体，其质量的提高，对于维生素C的内在质量(包括晶型的完整、均一、保质期的延长等)有着至关重要的作用，本论文考察了以絮凝法对发酵液进行预处理，效果较好。

The products that we have been developed are: intermediate include Protoporphyrin,, protein peptone, plant peptone; Flavor material include hydrolyzed vegetable protein, meat flavor protein powder; food material include compound amino acid powder, soybean peptide,soybean polypeptide,blood peptide, collagen polypeptide, fish protein powder and hydrolyzed animal protein; protein powder include hydrolyzed soybean protein, hemoglobin,hemocrystallin and food-grade whey protein.

目前的已经开发的产品有医药中间体：原卟啉、卟啉铁、蛋白胨、植物蛋白胨；调味品原料：水解植物蛋白粉、肉味蛋白粉；食品原料：复合氨基酸、甘氨酸、大豆缩氨酸、大豆多肽、血肽、胶原多肽、鱼蛋白粉、水解动物蛋白粉和蛋白质粉系列产品：饮料专用型蛋白质粉、血红蛋白质粉、肉制品专用型蛋白质粉。进口的产品有乳清蛋白粉。

The final compounds structures were characterised by 1HNMR, elemental analysis and IR as well. Herbicidal activity of the compounds was evaluated both in vitro and in vivo. The results showed that most of them had good biological activities.

设计合成了一系列新化合物，合成得到38个中间体，均得到了1H核磁共振证实；14个目标化合物，全部通过了1H核磁共振和元素分析的证实，部分化合物还得到了红外光谱的验证。

It is a key intermediate in the synthesis of material with nonlinear optical properties, functional molecular wires, polymetal heteronuclear complexes containing ferrocenylacetylide.

它是合成具有非线性光学材料、功能化的分子导线、多金属异双核配合物的关键中间体。

Then ω-iodo hexadecanoic acid and ωbromo long-chained fatty acids with fourteen, fifteen and sixteen carbons were prepared from 1,ω-fifteen or sixteen carbon dibasic fatty acids in four steps of organic reactions respectively.

以天然酒石酸为原料，经过十二步有机反应，制备了两个手性甘油中间体（合成路线中含六个未见文献报道的化合物，但两个没有分离）。

Homochiral cyanohydrins are of synthetic interest as they may be elaborated into a number of key multifunctional intermediates.

氰醇是合成一些多官能基化合物的重要中间体。

These compounds are of substantial interest both inviewpoints of theory and practical applications, mainlyunder the stimulus to achieve synthetic models either foractive sites of iron-sulfur proteins or for transitionmetal catalysts. This thesis describes the synthesis, structures andconformations of 51 new iron-sulfur cluster complexes,which have been characterized by elemental analysis andstandard spectroscopic methods. In addition, single-crystalX-ray diffraction analyses were performed for 4 representa-tive new compounds. Reactivities of μ-〓 with mono- and di- Grig-nard reagents derived intermediates toward various organicelectrophilic substrates were studied, along with complexa-tion of arynyl-containing iron-sulfur clusters by 〓Thus, several bridged, non-bridged, monomeric, dimeric,homonuclear, heteronuclear iron-sullfur and iron-sulfur co-balt-carbon cluster complexes were synthesized. A novelreaction and convenient route for the synthesis in highyield of tetranuclear iron complexes 〓 containing atetracoordinated sulfur atom was discovered, whereas aplausible mechanism based on experimental results was propo-sed for the formation of the new cluster type.

鉴于有机铁硫原子簇化学在基础理论发展和应用方面的重要意义，因此我们开展了这一课题的研究，并取得以下主要成果： 1、本文共合成了51个新有机铁硫及含钴碳簇基的有机铁硫原子簇配合物，除用元素分析，NMR，IR，MS法表征其结构和构象外，还用X-光衍射技术测得四个代表性配合物的单晶结构和构象； 2、我们业已发现炔基Grignard试剂同〓可形成一种&开环&与&闭环&中间物的平衡混合物，研究该平衡混合物同各种亲电试剂的反应； 3、研究发现了一种可高产率地形成〓含〓四配位硫挛合簇的新化学反应并对此反应提出了—种有趣的反应机理； 4、首次由1，4-二溴丁烷双Grignard试剂与〓制得一种新型铁硫簇双硫阴离子活性中间体，并进而研究了它的亲核反应性能； 5、找到了通过〓的光化学反应来合成簇合物〓-〓的一条有实用价值的新路线。

We produce a reliable product quality and reasonable price, and customers have been recognized and well-led products; artemisinin, galanthamine hydrobromide, Uncaria alkaloids, such as pharmaceutical intermediates, in line with the new concept of modern green .

我们生产的产品质量可靠，价格合理，且得到了广大用户的肯定和好评，主导产品；青蒿素、氢溴酸加兰他敏、钩藤总碱等医药中间体，符合现代绿色环保新理念。

Chiral β-hydroxy acids are key intermidiates in chemical industry and organic synthesis.

手性β-羟基酸及其衍生物是应用化工和有机合成的关键中间体。

Hydroxyacetic acid is one of the most important bulk fine chemicals,extensively used in adhesives,metal cleaning,biodegradable polymers,dyeing,textiles,and as a component in personal care products.

α-羟基乙酸是一种重要的大宗精细化工中间体，广泛应用于黏合剂、金属清洗、生物降解材料、染色、纺织，而且是个人护理产品的重要组成成分。

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％。