二环的

The cis novel bisoxazoline ligands L1-L4 have been synthesized through the treatment of new cis dihydroxy diamide with p-toluenesulfonyl chloride in the presence of catalytic quantity of 4--pyridine, and the cis dihydroxy diamide could be achieved from the condensation of the amino alcohols and cis cyclopropane dicarbonyl chloride prepared via oxidation and halogenation from cis-2,2-dimethyl-3-formylcyclopropanecarboxylate with DCC.

我们以蒈醛酸内酯为起始原料，经过氧化反应、酰氯化反应得到顺式环丙烷二酰氯，然后在二环己基碳二亚胺的催化下与相应的氨基醇反应合成了顺式二羟基酰胺，再用对甲苯磺酰氯将羟基活化，最后在二甲氨基吡啶的催化下关环合成顺式双噁唑啉配体L1～L4。

The β carotane is the principal compound in carotane series and contains perhydro carotene.24 ethylcholest 5 en,steradiene and cholest 5 en are present in the sediments.

萜烷化合物中的二环倍半萜碳数范围在C17～C21；羊毛甾烷分别为C308β、9α－羊毛甾烷、C31的24－甲基羊毛甾烷和C32的24－乙基羊毛甾烷。

We can see that bicyclic, tricyclic, tetracyclic rings or even outside the bustling construction sites everywhere, but ordinary people can afford the number, which those in the industry or buyers have to have sufficient alertness.

我们可以看到，二环，三环，四环，甚至内外环繁华的建筑地盘无处不在，但普通民众可以负担的数目，这是该行业或买家必须有足够的警觉。

CySeCD exhibits better GPX activity than 6-AnSeCD in the reduction of H2O2 and cumenyl hydroperoxide by glutathione, respectively.

采用双酶偶联法测定GPX的活力结果显示，6A，6A'-二环己胺－6B，6B'-二硒桥联－β-环糊精(6-CySeCD)催化谷胱甘肽还原H2O2和枯烯H2O2的活力均比6-AnSeCD的高。

Results show that clicyclohexyl ammonium decanoate has the best inhibiting effect in neutral water and dicyclohexyl ammonium hexylate, dicyclohexyl ammonium octoate and dicyclohyxyl ammonium decanoate are good inhibitors of iron and steel in hydrochloric acid.

研究结果表明，十个碳的二环已胺在中性水中具有最好的缓蚀效果。已酸、辛酸及癸酸十二烷胺等是盐酸溶液中钢铁的优良缓蚀剂。

The glycyrrhizic acid antigen is prepared through the process including following steps: dissolving glycyrrhizic acid in N, N-dimethyl formamide, dioxane or dimethyl sulfoxide, heliophobically adding N-hydroxy succinimide, reacting with dicyclohexylcarbodiimide at 0-10 deg.c for 2-5 hr; and reacting with carrier protein at normal temperature for 4-6 hr to obtain glycyrrhizic acid antigen.

本发明所提供的甘草酸抗体，是用甘草酸抗原免疫动物，然后从被免疫动物的血清中分离得到的；所述甘草酸抗原按如下过程制备：先将甘草酸溶解在N，N-二甲基甲酰胺、二氧六环或二甲基亚砜中，避光加入N-羟基琥珀酰亚胺，然后在0-10℃条件下与二环己基碳二亚胺反应2-5小时；接着与载体蛋白常温反应4-6小时，得到甘草酸抗原。

In accordance with the original thinking, the Second Ring expensive than tricyclic, tricyclic tetracyclic than expensive, but several major features in this area under the influence to subvert the original value has been fully assessed standards.

按照原来的思维，二环比三环，三环四环比昂贵，但几个主要的功能在这方面的影响下，颠覆了原来的价值已经被充分评估标准。

Chongqing Steel Head Hotpot: Address Ma Dao, starting from Chairman Mao, as the people of West Road, go west along in the Dongcheng Gen Street approaching the first turn right down a small hole in Thistle is a horse, and the Dongcheng Gen Street parallel; another 1 In the second ring road, from the Dragon Boat Road (Jiuyanqiao Sichuan-to-door) down the river to the Second Ring Road direction, to a hole in the Second Ring Road at the traffic lights down, turn left on to a few tens of meters, in the left hand side, the door hanging a lot of red lanterns.

重庆钢头火锅：地址马道街，从毛主席像出发顺着人民西路往西走，在快到东城根街的前一个小口子倒右拐就是马道街，和东城根街平行；另外一家在二环路上，从龙舟路顺着河往二环路方向走，到了二环路的红绿灯口子倒左拐，几十米就到了，在左手边，门口挂了很多红灯笼。

At present, improving native cultivars of waxy corn and inbred lines derived form first cycle selection by introduction useful genes from yellow maize was the primary method widely used in waxy corn breeding program.

目前，利用普通玉米优良基因改良糯质农家品种及糯质一环系是我国糯玉米育种的主要方法；利用糯玉米杂交种选育二环系已成为我国糯玉米育种的次要方法，但有可能成为主要方法。

Commercial dicyclopentadiene must be thermally degraded to the monomer, which is used in the preparation of ferrocene.

工业用的二环茂二烯必须加热降解为单体，这正是制备二茂铁要用到的。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。