{'fraction_non_alphanumeric': 0.0161892901618929, 'fraction_numerical': 0.0012453300124533001, 'mean_word_length': 6.376146788990826, '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}}
Stability of microcystins from cyanobacteria: effect of light on decomposition and isomerization.

Microcystins are potent hepatotoxins produced by cyanobacteria. Their geometrical isomers [6(Z)-Adda microcystin] do not essentially show hepatotoxicity and show weaker tumor-promoting activity than their parent toxins. The present study was undertaken to examine stability of microcystins during the analysis and purification and under photolysis conditions in connection with the detoxification. Microcystin LR was very stable because of limited decomposition and isomerization to its geometrical isomer during analysis and purification. While microcystins decomposed very limitedly by exposure with sunlight alone, the addition of pigments extracted from cyanobacteria accelerated their decompositions