Abstract: An object of the present invention is to provide a pigment composition and an ink (in particular, a waterborne ink) that can reduce a viscosity increase over time when an azo lake pigment is used as a pigment and also have excellent color strength and gloss in printed products. The pigment composition according to the present invention includes a divalent metal lake azo pigment, and 0.1% by weight to 20% by weight of a divalent metal salt of a mono- or di-carboxylic acid compound. The divalent metal of the divalent metal salt is preferably an alkaline earth metal ion. The mono- or di-carboxylic acid compound is preferably a mono- or di-carboxylic acid compound having a carbon number of 4 to 20.

Abstract: Disclosed is a cell classification method, to be executed by an analyzer, for classifying cells contained in a specimen, including: preparing a first measurement sample by treating a specimen under a first preparation condition; obtaining a first signal from the prepared first measurement sample; classifying, by using the first signal, cells contained in the first measurement sample; preparing a second measurement sample by treating the specimen under a second preparation condition different from the first preparation condition; obtaining a second signal from the prepared second measurement sample; classifying, by using the second signal, cells contained in the second measurement sample; and comparing a result of the cell classification performed by using the first signal and a result of the cell classification performed by using the second signal, with each other, and outputting an analysis result including a number of cells on the basis of a result of the comparison.

Abstract: A protein composition which comprises a mixture of glycine, phenylalanine and histidine and/or a cellulose ether derivative as an additive and has resistance to radiation sterilization.