Ricoh Company, Ltd.

Tokyo Electron Limited

Shimadzu Corporation

Kentaro Tomita

Kiyonori Tsuda

Takashi Suzuki

Koichi Sakata

Koichi Kato

Shigenori Ozaki

Junichi Terai

Yasuhiro Oshima

Kenichi Kagawa

Maiko Koeda

Tomoaki Kurakazu

Kunitada Hatabayashi

Shinichi Gomi

Daisuke Hiramaru

Masatoshi Takahashi

There is provided a method for easily determining an undifferentiated state of pluripotent stem cells without relying on the judgment of a skilled technician. The method includes: a step of evaluating an undifferentiated state of pluripotent stem cells based on a time-dependent change in a variation value of an extracellular metabolite contained in a culture medium in which the pluripotent stem cells are cultured, wherein the extracellular metabolite is at least one selected from a group consisting of L-glutamic acid, L-alanine and ammonia.

Method for determining undifferentiated state of pluripotent stem cells by culture medium analysis

An image forming apparatus is provided with a measuring device, which measures multi-colors in a multi-color toner image formed on a recording sheet that is output from the image forming apparatus. Based on the measured multi-colors, the image forming apparatus estimates an output value of each one of primary color toner images that constitute the multi-color toner image, and corrects an image forming condition of each one of the primary color toner images based on comparison between the estimated output value of the primary color toner image and a target value of the primary color toner image.

Image forming apparatus, image forming control method, and recording medium storing image forming control program

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Tokyo, Japan

Kentaro Tomita