查询词典 aromatic

It was demonstrated that the novel functional hyperbanched polyethylene could be prepared by the copolymerization of ethylene and polar comonomers protected by alkyl or aromatic silyl group.

研究表明，经烷基或芳基硅烷基团保护的极性单体与乙烯在MHNB催化作用下，通过共聚可以得到结构新颖的功能性超支化聚乙烯。

The facts indicate that apart from the asymmetric induction of chiral diamine backbone,sterically hindered substitute groups on the aromatic rings,and the presence of sp~3-hydridized amino donors and its N,N\'-disubstituted groups in chiral SalanCrX complexes all play important roles in controlling polymer stereochemistry and enantioselectivity.

研究发现除了手性二胺骨架的不对称诱导作用，苯环上的大位阻取代基、N，N\'-二取代基的位阻作用以及N原子上sp~3杂化的供电子效应都对调控聚合物的区域和对映体选择性有很大作用。

Perennial marsh plant having swordlike leaves and aromatic roots.

生长于沼泽地带的一种多年生植物，具有剑状的叶子和带有香味的根。

Experimental Study on Inhibitory Activities of Bee Gel , Tea , Syzygium Aromatic um and Their Compositions on Streptococcus Mutans

蜂胶，茶叶，丁香组方对变形链球菌抑制作用的实验研究

The running buffer consists of 10 mmol/L tetraborate (pH 10.0) and 10 mmol/L β-CD. The applied voltage was 25 kV and the detection wavelength was 214 nm. The eight aromatic acids were completely separated and determined within 9 min. The linear relations were from 5 μg/mL to 120 μg/mL and their correlation coefficients were between 0.9967 and 0.9992. The method was rapid, simple and effective.

实验优化了分离测定条件，以pH 10.0的含有10 mmol/Lβ-环糊精的硼砂缓冲溶液(10 mmol/L)作为电泳缓冲液，工作电压25 kV，检测波长214 nm， 9 min内实现了8种芳香族羧酸的基线分离，芳香族羧酸在5~120μg/mL范围内呈良好的线性关系，其相关系数在0.9967到0.9992之间。

A series of 3,3,6,6 tetramethyl 1,8 dioxo 9 aryl 1,2,3,4,5,6,7,8,9,10 decahydro acridines have been synthesized by the condensation of aromatic aldehydes, 5,5 dimethyl 1,3 cyclohexanedione and ammonium acetate in the presence of triethylbenzylammonium chloride as catalyst in water.

芳醛、5 ，5 二甲基 1，3 环己二酮与醋酸铵在三乙基苄基氯化铵催化下以水作为溶剂反应，生成一系列 3 ，3 ，6，6 四甲基 1，8 二氧代 9 芳基 1，2 ，3 ，4，5 ，6，7，8，9，10 十氢吖啶，与其它溶剂相比，水作为该反应的溶剂具有价格便宜，不易燃和无毒等优点，而且产率较高，产物的结构通过单晶X射线确

Through cyclic hydrogen bonding with motif formed by coordinated water molecules and coordinated hydroxyl groups of dhbd from adjacent tetranuclear units, these adjacent neighbors are connected to afford a 1D supramolecular chain along axis a, which is further extended via aromatic intercalations and other crystallization water molecules into a 3D structure with channels.

毗邻的四核单元通过配位H2O分子和配位羟基O原子形成的 R 22(8)型环形氢键桥的连接，沿a轴方向构建了四核单元交替相连的一维超分子链；链间籍苯环的π-π堆积作用和晶格水分子氢键链的连接进一步扩展为具有隧道的三维结构。

Any of various usually aromatic plants of the genus Teucrium, with purplish or reddish flowers.

美洲石蚕一种石蚕属通常芳香的植物，有带紫或红色的花朵

It is a new way of direct utilization of coal aromatic macromolecule structure without the thermochemic conversion of coal.

直接利用煤的网状大分子结构，开发不经或少经热化学转化而直接利用的煤填充高分子复合材料新技术，是煤清洁、高效利用的新途径。

It is a new way of direct utilization of coal aromatic macromolecule structure without the thermochemic conversion of coal. A coal filled polyolefin master batch has been developed.

直接利用煤的网状大分子结构，开发不经或少经热化学转化而直接利用的煤填充高分子复合材料新技术，是煤清洁、高效利用的新途径。

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％。