Abstract: Provided is a method of culturing a human hepatic parenchymal cell, including culturing a human hepatic parenchymal cell in a medium containing: a culture supernatant of a human hepatic nonparenchymal cell; a Wnt signaling promoter; and a mitogenic growth factor.

Abstract: The present invention relates to an inspecting device for a print which can scan the entire print pattern of a printed sheet by an optical detecting device, detects the image information of the print pattern at every pixel, calculates the difference between the detected image information with reference information, delays the differential signal in several pixels in the scanning direction of the optical detecting device, calculates the difference between the differential signal and the delayed differential signal, sets a threshold level to the twice differential signal produced from the result, and judges the production of a printing defect when the twice differential signal exceeds the threshold level, thereby accurately detecting the printing defect even when the entire variation in the color density occurs on the printed sheet.

Abstract: The present invention relates to a gravure screen and method of making the same and particularly to a gravure screen and method of making the same in which in the case that a gravure printing plate is made using a planographic or relief half-tone positive, the gravure screen is combined with the half-tone positive.Transparent or opaque lines of the gravure screen in accordance with the present invention are formed by irregular patterns, and the presence of this irregularity does not cause to form a moire pattern even if the gravure screen is combined with the planographic or relief half-tone positive formed by regularly aligned dot patterns.It is therefore possible to combine the gravure screen of the present invention with a half-tone positive of any screen angle, and a gravure printing plate can be made by only one gravure screen even in a plurality of half-tone positives having different angles.