Abstract: A photo treatment device includes a gas generator that generates a mixed gas in which a raw material gas containing an organic compound having at least one of oxygen atoms and nitrogen atoms is mixed with a carrier gas at a desired mixing ratio; a chamber connected to the gas generator for allowing ventilation so as to enable the mixed gas to be supplied thereinside and that is capable of placing the workpiece thereinside; and a light source that irradiates the raw material gas with ultraviolet light having intensity at least in a wavelength band of 205 nm or less. The surface of the workpiece is modified with the raw material gas that has been irradiated with the ultraviolet light.

Abstract: Provided is a fluorine resin surface modification method wherein an object to be processed and a processing device and the like are not readily damaged, wherefrom the risk of harmfully impacting a human body is small, and which can be carried out with simple equipment. The fluorine resin surface modification method including the steps of: irradiating an organic compound containing an oxygen atom with ultraviolet light having at least an intensity in a wavelength range of 205 nm or less to generate a radical; and bringing the radical into contact with a surface of a fluorine resin to form a hydrophilized layer on the surface.

Abstract: Provided is a reduction treatment method in which hydrogen radicals are efficiently generated in an amount required for reduction treatment and the surface of an object to be treated is reduced by a relatively simple treatment process. A reduction treatment method including: irradiating a hydrogen radical source-containing material with ultraviolet light having a wavelength of 255 nm or less to generate hydrogen radicals; and bringing the generated hydrogen radicals into contact with a surface of an object to be treated to reduce the surface.

Abstract: The present invention relates to a method for treating wastewater containing a furan compound, a microbial preparation for use in the method, a method for high density culture of a microorganism for use in the above method, and a method for producing a microbial preparation by using the culture method.