驻极体

Recently, the application study of electret in life science has been proceeding briskly.

近年来，驻极体在生命科学领域的应用研究取得了长足的进展，本文对此进行简要综述。

The Company is mainly engaged in design development, production capacitive electret microphone, wire products.

本公司主要从事设计开发、生产电容式驻极体传声器、线材系列产品。

The results showed that (1) Surface charge density of apoptotic cell of electret group was significantly reduced as compared with those of control group.

结果显示：（1）负极性驻极体作用3T3细胞能减少凋亡细胞的表面电荷密度。

Negative electret can improve cell growth and increase cell surface charge density.

负极性驻极体具有促进成纤维细胞生长和增加细胞表面负电荷量的作用。

Positive electret can restrain cell growth and reduce cell surface charge density.

正极性驻极体具有抑制成纤维细胞生长和降低细胞表面电荷密度的作用。

Objective: To study the influence of electret field on fibroblast cell cycle and to probe its mechanism.

目的： 研究驻极体对成纤维细胞生长周期的影响及其调控机制。

Therefore, the electret is also often referred to as the "Wing-body electric."

因此， 驻极体也被人们常称为"永电体"。

The electrets properties of homemade ZPKI PI films were studied by comparing with Kapton PI films supplied by Dupont.

通过和杜邦公司产KaptonH商品膜驻极体性能比较，系统研究了由国产ZPKI型聚酰亚胺前体溶液制备薄膜的驻极体性能。

The influence of charging parameters (such as charging voltage, charging time and charging temperature, etc.) on piezoelectricity and its thermal stability of cellular polypropylene film electrets was studied by means of contact charging and constant voltage corona charging methods and the thermal stimulated discharge technique.

通过接触法充电、恒压电晕充电，以及开路热刺激放电技术，对充电参数(例如充电电压，充电时间和充电温度等)对聚丙烯蜂窝膜驻极体的压电性及其热稳定性的影响的研究，并从孔洞型薄膜压电体的材料结构和理论模型出发，讨论了这些参数对其影响的原因，分析了与压电活性密切相关的空间电荷的动态特性。

However,there are also slow polarization effects,which can not be described using Maxwell's theory.For the description of both fast and slow polarizations,a concept of boundary screen charges is introduced to avoid the complex electric displacement in dielectrics.Using quantum statistics,the excitation theory of screen charges can explain many properties of electrets and ferroelectrics.

慢极化效应使电介质的极化偏离了麦克斯韦方程组描述的规律，引入边界屏蔽电荷的概念来描述介质的极化过程，可以回避电介质内部复杂的电位移运动，从而能用屏蔽电荷激发的量子统计理论来说明驻极体和铁电体的许多性质。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。