Abstract: Disclosed is an Fe-based electroplated steel sheet including: a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less; and an Fe-based electroplating layer formed on at least one surface of the Si-containing cold-rolled steel sheet with a coating weight per surface of 5.0 g/m2 or more, in which in an intensity profile measured by glow discharge optical emission spectrometry, a peak of emission intensity at wavelengths indicating Si is detected within a range from a surface of the Fe-based electroplating layer to more than 0.2 ?m in a thickness direction and not more than a thickness of the Fe-based electroplating layer, and an average value of C concentration in a region ranging from 10 ?m to 20 ?m in the thickness direction from the surface of the Fe-based electroplating layer is 0.10 mass % or less.

Abstract: This invention relates to a blood disinfection method to disinfect retroviruses and other viruses by repeating the following procedures: extracting blood infected with retroviruses such as HIV, HBV, HCV and other viruses from a patient's body, irradiating a YAG laser beam externally on it via a reflection mirror, and returning it to the patient. A disinfection system essentially consists of a low temperature room to lower temperature of a patient in this system, a blood circulation system to circulate blood by extracting blood of the patient from his or her body and returning it, and a laser beam irradiation means to irradiate a laser beam on his or her blood circulating in this blood circulation system.