极性

Thus, the photophysical properties of the polymers can be tuned by attaching different substituted side groups onto the phenylene.

溶剂的极性对聚合物溶液的光谱性能有显著的影响，溶液光谱随溶剂极性的增大逐渐向长波移动。

In the non-polar solvent, auto-sensitized photooxidation of the aminated hypocrellins is mainly involved with the singlet oxygen mechanism.

三。在非极性溶剂中，胺基衍生物的自敏光氧化主要涉及单重态氧的机制，在极性溶剂中则以超氧负离子自由基的机制为主。

Separation of organic-organic mixtures by pervaporation is discussed with emphasis on the following aspects: pola...

其中，又重点报道了有机混合液分离的最新研究成果，将其分为：极性/非极性化合物、芳香烃/脂肪烃体系、芳香烃/脂环烃体系、同分异构体、多元体系和汽油脱硫等六部分进行了详细叙述。

For a peptide to act as part of the host defense system or to be of pharmaceutical interest, high antimicrobial activity must be combined by low hemolytic activity. Our results indicated that the antimicrobial activity increased with increasing charge and polar angle, with charge of ＋4 and polar angle of 140° exhibiting the highest antibacterial and membrane permeabilizing activity. Higher hydrophobicity and hydrophobic moment correlated with increased hemolytic activity, thus decreasing selectivity dramatically.

胜肽要扮演宿主免疫机制的一部分或要成为新型态的抗生素不仅要有强大的抗菌活性还需要有高度的选择性，由本实验的结果发现，当抗菌胜肽的正电荷及极性角度增加时，胜肽之抗菌活性会随之增加，当抗菌胜肽的电荷为＋4而极性角度为 140°时，胜肽有最强之抗菌能力及膜渗透活性；而随著胜肽疏水性以及疏水性矩的增加，会增加溶血活性，结果反而降低了抗菌胜肽的选择性。

The problem of slow TPH degradation found to be related to the polar fractions accumulation. Increase of fungi community diversity was found helpful in decomposition of the polar fractions. The symbiotic environment between bacteria and fungi was beneficial to the 2nd –stage TPH biodegradation.

至於各组降解迟滞的问题则与污染物三成份中极性物质的累积有关，在累积过程中真菌类多样性的增加，有助於极性物质的去除，最后细菌类与真菌类共生的环境能使污染物产生第二阶段的降解反应，因此污染物能持续降解。

They form a polar molecule, that is, one with a slightly positive end and a slightly negative end.

它们形成一个极性分子，也就是说，一个带有微弱正电荷和微弱负电荷的极性分子。

These can be interpreted by the polar microregions theory proposed that the relaxor characteristics are caused by a gradual freezing process of polar microregions, which arises from the inhomogeneous crystal structure of this kind of material.

这可采用极性微区理论阐释，弛豫特性是由此类材料非均衡性产生的极性微区在逐渐冻结过程中引起的。关键词： K0.5Bi0.5TiO3；铁电结构相变；弛豫特性；溶胶-凝胶法

Chemical bonds and structural theory of organic chemistry 6 class hoursKnow the history of organic chemistry; Grasp the basic theory of organicchemistry, such as structural theory, chemical bonds, resonance theory, atomic andmolecular orbital theory, and valence bond theory; understand polar and non-polarcompounds, dipole moment and know how to express the structures of organiccompounds with different molecular formulas.

了解有机化学发展简史；掌握有机化学结构理论、化学键理论、共振理论、原子和分子轨道理论和杂化轨道理论；了解极性和非极性分子并掌握有机化合物结构的表示法。

The method controls a whole operation process mainly through a PC, wherein the PC transmits a preset polarity parameter and an electric testing parameter to a PCI control module, and a light test parameter to a light test module, while the PCI control module transmits corresponding parameter signal to a polarity detection module and an electric test module; moreover, a fixture is started to carry out parameter testing, and then the data tested by the fixture is transmitted to the PC.

本发明主要是通过PC机来控制整个操作过程，其中PC机把预设极性参数、电测试参数传输给PCI控制模块，和由PC机把光测试参数传输给光测试模块，而PCI控制模块再把相应的参数信号传输给极性检测模块和电测试模块，并启动夹具进行参数测试，再把由夹具测试所得数据传输给PC机。

If the background current is the opposite polarity, these unwanted currents could cause a reverse polarity current reading.

如果背景电流是反极性的，那么这种不希望有的电流可能会引起反极性的电流读数。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。