【作者】 崔黎丽； 江键； 夏钟福； 方影； 宋诚荣；

【Author】 Cui Lili Jiang Jian~+ Xia Zhongfu~(++) Fang Ying Song Chengrong~(++) (School of Pharmacy,Second Military Medical University,Shanghai,200433,China) (+ Department of Physics and Mathematics,Second Military Medical University,Shanghai,200433,China) (++ Pohl Institute of Solid State Physics,Tongji University,Shanghai,200092,China)

【机构】 第二军医大学药学院无机教研室； 第二军医大学数理教研室； 同济大学玻尔固体物理研究所；

【摘要】 本文通过短路热激放电(Thermally Stimulated Discharge,TSD)电流谱的测量,对大鼠皮肤极化前后的介电特性进行比较分析,研究人工极化对大鼠皮肤的介电及驻极态变化的影响,探讨极化前后皮肤中空间电荷和偶极电荷的动态特性。结果指出:1)极化前,大鼠皮肤在RT～150℃温区的TSD电流谱出现多个电流峰,其分别是皮肤角质层类脂层状结构相变和蛋白质变性过程中空间电荷的释放与偶极电荷松弛的结果;2)正极性人工极化导致皮肤角质层类脂层状结构和蛋白质结构的改变、部分偶极电荷的松弛和空间电荷的释放,形成TSD谱线特征峰峰值的大幅增加和峰位向低温区迁移。更多还原

【Abstract】 Thermally Stimulated Discharge(TSD)was used to study the dielectric properties of the changes of rat skin before and after changing,the properties of space charge and dipole in the skin before and after charging.It was found that a)before charging,the current spectra appeared several current peaks with different energy level distribution in the range RT～150℃,which was related to the discharging of space charge and relaxation of dipole during the transition of lamellar lipid and the denaturation of the protein of the stratum corneum(SC);b)positive charging caused a large increas of the intensity of TSD peak and a shift to low temperature for peak position,due to the disording of intercellular lipid bilayer and protein structure,relaxation of some dipole and release of space charge.更多还原