{'fraction_non_alphanumeric': 0.03517110266159696, 'fraction_numerical': 0.0076045627376425855, 'mean_word_length': 5.460122699386503, '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}}
Cell Age Characterization of Erythrocytes in the Buffy Coat

The removal of the buffy coat from red cell concentrates is generally considered beneficial because it reduces the frequency of febrile transfusion reactions [l], the formation of microaggregates [2], and hemolysis during prolonged storage [3]. However, those advantages entail the wastage of about 16% of the red blood cells (RBC) [4]. Moreover, the removal is performed under conditions so similar to those successfully used to collect young RBC [5,6] that we suspected that the buffy coat would be significantly enriched with young RBC. Therefore, we measured two age-related parameters, pyruvate kinase (PK) activity [7] and reticulocyte count, in the whole blood before processing the buffy coat and the red cell concentrate. PK activity was measured with a commercial UV method (Boehringer Mannheim, FRG) and the reticulocyte count by cytofluorimetry with a thiazole orange reagent (ReticCount, Becton Dickinson, Mountain View, Cell Age Characterization of Erythrocytes in the Bum Coat