两极性

Two main factors made it,one is the nuclear hydroxyl number,another is the acid radical ionization degree.

极性主要由两个因素决定，一个是核的羟基数目，另一个是酸根的离子化程度。

The oily substances and the acidic components were characterized using elementary analysis, IR spectral analyses and acidimetry.

采用石油醚和三氯甲烷分级萃取孤岛油田含聚污水中的油分，得到两个不同极性的组分F1和F2；用碱抽提法从酸值较高的F2组分中分离酸性物质并将其甲酯化，通过柱层析法将甲酯化物分成Ⅰ、Ⅱ和Ⅲ三个甲酯组分。

The connection was tried in three different ways: Aldol reaction, coupling of sulfone and aldehyde, the Umpolung.

尝试三种不同的方法来进行两个片段的偶联。试验了Aldol反应，砜基与醛的偶联反应和极性反转的方法。

The strata in this section cover three lithostratigraphic units, seven conodont zones, five ammonoid zones and three bivalve zones. Two normal and two reversed magnetic polarity zones as well as the cyclic sequences corresponding to the Milankovitch climate periods driven by the Earth's orbit are well recognized in the lower part of the section.

该剖面包括3个岩石地层单元、7个牙形石带、5个菊石带、3个双壳类带；在剖面下段地层中识别出2个正向磁性带和2个反向磁极性带；与地球轨道天文周期相对应的Milankovitch气候沉积旋回也可以明确地辨认；碳氧同位素δ13C演变呈现两次大的旋回。

Two amino acid molecules associate in a side-by-side manner. Interactions involving hydroxyl group and apolar alkyl groups side-chains are significant in the pairwise association of amino acids.

氨基酸两分子间的结合主要是一种肩并肩的偶极吸引作用，羟基、非极性侧基均会参与相互作用。

However,after addition a little apolar molecules,apolar molecules insert into hydrophobic microdomains,which makes PPO chains extend at certain degree,and the order of LLC increases.Therefore,the systems will supply favorable conditions for enhancing the solubility of oil-soluble molecules,which further expands application prospects of the systems.

而加入少量极性较小的油溶性分子后，油溶性分子填充到PPO链段间，使得PPO链段在一定程度上得到伸展，液晶层间距增大，两亲分子排列的有序性增强，这就为油溶性分子的增溶提供了有利条件，扩展了该体系的应用前景。

In tetrapolarity mating system,A and B factor is two mating types locus locating different chromosome,only when two single spore mycelium form AαAβBαBβ,then can produce to dikaryon and complete whole sexual life history.Study according to the Eger.

在四极性交配系统中，A和B因子分别对应位于不同染色体上的两个交配型位点，两个单核菌丝相遇，只有当它们形成A1A2B1B2或者AαAβBαBβ型时，才能产生具有锁状联合的双核体，完成整个有性生活史。

The S type of CMS is a gametic sterility type, and its pollen sterility was considered to be associated with the expression of R region in the mitochondria.

其中两个含有完整R区的BamHI片断已被克隆测序，结果表明在这两个片断中cox1和cox2分别位于R区上游，但与之位于不同的极性单链上。

The stratification shows, as expected, that for this 8 sunspot, its stratification of the vectormagnetic fields has the main features of this kind: one umbra with positive polarity and the other with negative polarity; and the magnetic field vectors in the penumbra part between the two umbrae are more horizontal than those in the umbrae.

反演得到的δ型黑子的矢量磁场两层结构拥有δ型黑子的主要特征，两个黑子本影磁场极性相反，且本影之间的半影磁场的磁倾角很大，也就是在半影中磁力线几乎水平分布。

The stratification shows, as expected, that for this 8 sunspot, its stratification of the vector magnetic fields has the main features of this kind: one umbra with positive polarity and the other with negative polarity; and the magnetic field vectors in the penumbra part between the two umbrae are more horizontal than those in the umbrae.

反演得到的δ型黑子的矢量磁场两层结构拥有δ型黑子的主要特征，两个黑子本影磁场极性相反，且本影之间的半影磁场的磁倾角很大，也就是在半影中磁力线几乎水平分布。

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％。