单体

The constituents were extracted by some solvents. 18 constituents were isolated from Chloroform fraction by different chromatography. 15 constituents were identified by IR ,MS and NMR as follows: 3-sitosterol, P-sitosterylpalm itate,succinate acids, 1, 4-benzenediol, 1, 2-benzenediol, p-hydroxybenzaldehyde, syringaresinol, oleanolic acid, usolic acid, ethyl caffeate , Rosmarinic acid ethylster and etc. In such constituents ,nine compounds were isolated for first time from Origanum vulgare L..

牛至药材经水煮醇沉法所得浸膏，利用溶剂法和色谱法从中分离得到18个单体成分，通过IR、MS、NMR等波谱技术鉴定了其中的15个化合物，分别为β-谷甾醇(1)、β-胡萝卜苷(2)、琥珀酸(3)、对-二苯酚(4)、邻-二苯酚(5)、对羟基苯甲醛(6)、1.2-二羟基-4-异丙基-5-甲基苯(7)、新木脂素(8)、丁香脂素(9)、齐墩果酸(10)、乌苏酸(11)、4-二十六烯(12)、正二十六醇(13)、咖啡酸乙酯(14)、迷迭香酸乙酯(15)等，其中化合物3、4、5、6、7、8、9、14、15等9种化合物均为首次从该属植物中分离得到。

Results of a series of orthogonal design methods demonstrate that a crosslinked PAA superabsorbent composite with sodium tungstate, which is synthesized with a composition of 45.5 wt% of monomer, 0.4 wt% of crosslinker, 1.0 wt% of initiator, a neutralization degree of 83%, and a reaction temperature of 90℃, has a good water absorbency.

此外，通过对WPAA-Na的制备与吸水性能的一系列正交实验分析后得出，当单体浓度为45.5%、反应温度为90oC、交联剂浓度为0.4%、引发剂过硫酸钾浓度为1.1%以及中和度为0.85时，树脂的吸水倍率为佳。

Each chromosome in pachytene actually have been composed of two chromatids.

在粗线期每条染色体实际已由两条染色单体组成。

In meiosis, the association of four homologous chromatids seen during the pachytene stage of prophase.

减数分裂前期的粗线期中，四个同源的染色单体向联系形成的结构。

In pachytene the paired homologous chromosomes contract. At this point each chromosome consists of a pair of chromatids and the two associated chromosomes are termed a tetrad.

在粗线期，配对的同源染色体缩短，这时每条染色体包括2个联合的染色体，每个染色体包括1对染色单体，即四分体。

The pantothenate kinase enzymes consist of two strands of amino acids that fold into various twists and turns to make a complex 3-D structure, White said. These modules, called monomers, snap together to form the enzyme.

每一类型氨基酸都由自己独特的外形和大小，泛酸激酶包含两条氨基酸链，经过折叠扭曲形成复杂的三维结构，这些分子称为单体，彼此咬合形成这个酶。

The curve and parameter of products listed in the catalog embody the quality of single one.

本产品目录所列之特性曲线和参数只是我司产品作为一个单体时的质量情况，仅仅作为技术数据

Furthermore, a series of TPD-containing polymers were synthesized by the copolymerization of TPD with various pendent groups with DVB.

同时，进行了具有不同取代基的 TPD单体与DVB的反应，合成了一系列的含TPD的聚合物。

Aim To study on the new synthesis method of polymer monomer and copolymers bearing phosphorylcholine pendent groups under anhydrous condition.

目的研究在无水条件下，含磷酰胆碱基团的聚合单体的新合成方法。

This monomer co polymerized with acrylamide, then a copolymer PEPO PAM was obtained.

本文合成了脂肪醇嵌段聚醚丙烯酸酯单体，并与丙烯酰胺共聚，得到共聚物PEPO PAM。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。