{'fraction_non_alphanumeric': 0.014634146341463415, 'fraction_numerical': 0.02113821138211382, 'mean_word_length': 4.980582524271845, '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}}
Iodine-125, a tracer in cell biology: physical properties and biological aspects

Some essential physical properties of the transmutation of iodine-125 are discussed and the range of its electrons calculated. Its suitability for autoradiographs is compared with that of tritium. The dose distribution around a point source and the dose absorbed by a cell nucleus labelled with 125I and 3H are calculated. It is suggested that the biological toxicity of iodine-125 is not only due to energy deposition of its radiation but also to molecular fragmentation caused by charge transfer in consequence of the Auger effect.