scholarly journals Temperature dependent impedance spectroscopy and Thermally Stimulated Depolarization Current (TSDC) analysis of disperse red 1-co-poly(methyl methacrylate) copolymers

2016 ◽  
Author(s):  
Yee Song Ko ◽  
Eduardo Cuervo-Reyes ◽  
Frank A. Nüesch ◽  
Dorina M. Opris
Keyword(s):  
Impedance Spectroscopy ◽  
Methyl Methacrylate ◽  
Temperature Dependent ◽  
Depolarization Current ◽  
Poly Methyl Methacrylate ◽  
Thermally Stimulated Depolarization Current ◽  
Methacrylate Copolymers ◽  
Disperse Red 1 ◽  
Thermally Stimulated Depolarization

The Storing Properties of Electric Energy in Bone

2011 ◽  
Vol 493-494 ◽  
pp. 170-174
Author(s):  
Rumi Hiratai ◽  
Miho Nakamura ◽  
Akiko Nagai ◽  
Kimihiro Yamashita
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Electric Fields ◽  
Electric Energy ◽  
Depolarization Current ◽  
Thermally Stimulated Depolarization Current ◽  
High Temperature And Pressure ◽  
Temperature And Pressure ◽  
Thermally Stimulated Depolarization ◽  
Inorganic Components

We have shown that hydroxyapatite (HA), which characteristics were similar to those of bone’s inorganic components, had polarization capability and was possible to accumulate electricity under high temperature and pressure. Then, we presumed that bones had polarization capability which enabled electrical storage and conducted the experiment to measure the polarization capability of bones using rabbit’s femurs. After preparing and polarizing bone samples using KOH treatment (koh), KOH and baking treatment (koh+bake) and decalcification treatment (decalcification) as well as the bone without any treatment (untreat), quantitative amounts of stored charge in samples were determined by thermally stimulated depolarization current (TSDC) measurement of these samples. Under the condition of 400 °C for 1 h with the electric fields of 5kV/cm, samples of koh, koh+bake, and untreat showed polarization capability. In addition, under the polarization condition of 37 °C for 1 hour with the electric fields of 5kV/cm, all samples showed polarization capability. Those findings can be summarized that bones have the polarization capability which enables electrical storage and polarization of bones is possible even under the low temperature condition, which was at 37 °C in our experiment, where polarization is impossible for HA.

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