{'fraction_non_alphanumeric': 0.022565320665083134, 'fraction_numerical': 0.004750593824228029, 'mean_word_length': 5.386363636363637, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Electrically enhanced erosion of porous Si material in electrolyte by pH modulation and its application in chronotherapy

We have studied the enhanced erosion of porous Si material in the vicinity of a cathodic electrode during electrolysis of tap water and simulated gastric or intestinal fluids. This enhanced erosion is attributed to the pH increase (more alkaline) near the cathode due to a local depletion of the [H+] species during the electrolysis of water. The effect provides a means of electrically controlling drug release from the porous Si structures useful in chrono‐therapeutic applications. We have described the concept and prototype of a self‐contained electronic time‐controlled drug delivery capsule system suitable for oral administration or implantation into the body. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)