Springer Imageshttp://www.springerimages.comSpringerImages provides a new way to access hard-to-find SpringerLink content of the utmost value to researchers: images.2013-05-19T02:02:57.095726+02:00Copyright Springer 2013. Produced by Current Medicine Group Ltd, a part of Springer Science+Business MediaSpringerImageshttp://www.springerimages.com/images/springer.gif The equivalent circuit model used in this study <img src="http://img.springerimages.com/Images/Springer/JOU=10853/VOL=2011.46/ISU=13/ART=5368/MediaObjects/THUMB_10853_2011_5368_Fig8_HTML.jpg" width="150" height="120"/> <p> The equivalent circuit model used in this study </p> http://www.springerimages.com/Images/RSS/1-10.1007_s10853-011-5368-0-7