中间体

The results reported before showed that phyco-bilins are intermediades in the biosyn thesis of phycobilip-roteins and the thioether formation of phy cobilins are thelast step of the chromoprotein biosynthesis.

实验证明在藻胆蛋白生物合成过程中，藻胆色素是中间体。藻胆色素的硫醚键形成是其过程的最后一步。

The sulphur atom in the intermediate has sp2 hybridization, and the remaining p orbital is symmetrical to the d orbital of the metal center. Thus, the lone pair on the p orbital can have interaction with the d orbital to form a π bond, which leads to the coplanarity of the center of Cp ring, Ru, P, S and Si atoms, rather than the deviation of P, S and Si atoms from the plane.

该中间体中，硫原子采取sp2杂化，硫原子剩余的一个p轨道与金属中心上的d轨道具有相同的对称性，因而该p轨道上的孤电子对可与金属中心上的d轨道形成π键，导致Cp环中心， Ru， S1， P和Si原子在同一平面内，而不是S1， P和Si原子偏离该平面。

The leading products of our Company are para cresol, with an annual output of 8,000 tons; food additives, such as potassium sorbate and sorbic acid, with an annual output of sorbic acid and potassium sorbate 10,000 tons, which occupied in the domestic market; Meanwhile, exported to Europe, the United States, Japan, South Korea and other countries and regions, whose volume accounts for 60% of the total, which has made it an important export-oriented enterprises of Dezhou Area, and also, has become the world's production base of para cresol and an important production base of sorbic acid and potassium sorbate domestically .

公司主导产品为医药中间体对甲基苯酚、食品添加剂山梨酸和山梨酸钾等。目前，公司年产对甲基苯酚8000吨，山梨酸和山梨酸钾25000吨，产品在占领国内市场的同时，远销欧、美、日、韩等国家和地区，出口量占销售总量的60%以上，成为德州市重要的出口创汇型企业，并成为全球对甲基苯酚生产的重要基地和国内山梨酸和山梨酸钾重要的生产基地。

An import and export tax Chapter 25 desalination, cement and all other non-metallic minerals, coal, natural gas, paraffin, asphalt, silicon, arsenic, stone material, non-ferrous metals and scrap and other metal ceramics; 25 kinds of pesticides and intermediates, some finished leather, lead-acid batteries, mercury oxide batteries, etc.; fine goat wool, charcoal, crosstie, cork products, some primary wood products such as the abolition of export tax rebate policy.

一个进口和出口税第25章海水淡化，水泥及其他非金属矿物，煤炭，天然气，石蜡，沥青，硅，砷，石材，有色金属及废料等金属陶瓷，25种农药及中间体，部分成品革，铅酸蓄电池，氧化汞电池等；细山羊毛，木炭，枕木，软木制品，部分木材初级制品如出口退税政策取消。

They are intermediate and by-product of crystal violet lactone while it was synthesized.

LCVL和三甲烷分别是热、压敏变色染料结晶紫内酯的合成中间体及副产物。

The processes for preparation of tribenuron-methyl and its key intermediates were reviewed. Comparing the yield, quality, cost, safety and environmental protection and other aspects, the best production process of tribenuron-methyl is to use the methyl 2-benzoate and sodium cyanate as raw materials.

综述了苯磺隆及其关键中间体的主要生产工艺，并对各生产工艺在收率、质量、成本、安全环保等方面进行了比较和评价，指出了以邻甲酸甲酯苯磺酰氯、乙腈和氰酸钠为原料的工艺是苯磺隆的最佳生产工艺。

All compounds are synthesized starting from the acylation reaction of gallic acid with L-glutamine to form the basic scaffold, followed by the cyclic reaction in acetic anhydride and the key intermediate cyclic anhydride (compound 4) was obtained. The intermediate compound is condensed with different amino acids or primary amines, and produces the target compounds.

本研究以L－谷氨酸为基本骨架，与甲醚化保护的没食子酸缩合后，经过酰化、环合反应得到关键中间体环状酸酐（化合物4），再经胺解反应合成目标化合物，其化学结构经过红外光谱、电喷雾质谱和核磁共振谱（氢谱、碳谱、碳氢异核多键相关谱）确证。

Thus, the method can only be used to the cyclization of N~4-aryl-4,5,6-triaminopyrimidine with oxalic acid.

在合成各类化合物的过程中，共得到未见文献报道的新型中间体50多个，并根据其结构特征，用相应的光谱对其结构进行确证。

Catalytic dehydrogenation of cyclohexanol to cyclohexanone is an industrially important...

环己酮是几内酰胺生产工业中的重要中间体，同时环己酮还广泛用作有机溶剂、合成橡胶以及工业涂料等，是化学工业的一个重要产品。

Catalytic dehydrogenation of cyclohexanol to cyclohexanone is an industrially important reaction in the manufacture of caprolactam, which is used as a material for the synthesis of nylon.

环己酮是几内酰胺生产工业中的重要中间体，同时环己酮还广泛用作有机溶剂、合成橡胶以及工业涂料等，是化学工业的一个重要产品。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。