Abstract: Provided is an air conditioner 100 used in a space R containing a gas having a concentration of carbon dioxide of 5000 ppm or less, the air conditioner 100 including a flow path 10 connected to the space R, in which a removal section 10c for removing carbon dioxide contained in the gas is disposed in the flow path 10, an adsorbent 80 containing cerium oxide is disposed in the removal section 10c, and the carbon dioxide adsorbs on the adsorbent 80 as the adsorbent 80 comes into contact with the gas.

Abstract: Provided is an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the adsorbent containing cerium oxide and has a pore diameter having a differential pore volume of 0.0085 cm3/g-? or more in a region where a pore diameter is 7 ? or less in pore distribution measured by Horvath-Kawazoe method.

Abstract: Provided is an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the adsorbent containing cerium oxide containing cerium and a metallic element (excluding cerium) having an electronegativity of 1.00 or more.

Abstract: Provided is a method for producing an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the method including a firing step of firing a raw material containing at least one kind of cerium salt selected from the group consisting of a carbonate of cerium and a hydrogencarbonate of cerium.

Abstract: Provided is an adsorbent used for removing carbon dioxide from a gas comprising carbon dioxide, the adsorbent comprising a cerium oxide and having an average pore diameter of 50 nm or less, the average pore diameter measured by the BET method using argon gas as an adsorption gas.

Abstract: Provided is a method for producing an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the method including a reaction step of reacting a mixture containing tetravalent cerium and at least one kind selected from the group consisting of urea, a urea derivative and an amide compound.

Abstract: Provided is an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the adsorbent containing cerium oxide, in which a lattice constant of the cerium oxide is 0.5415 nm or more.

Abstract: A carbon dioxide separation/recovery device for separating and recovering carbon dioxide from a gas to be processed and containing nitrogen oxides and carbon dioxide by using a carbon dioxide scavenger, including a carbon dioxide trapping unit having the carbon dioxide scavenger, in which the carbon dioxide trapping unit includes: a gas flow inlet which introduces the gas to be processed; a heating unit of heating a scavenger heating gas used upon desorption of carbon dioxide trapped by the carbon dioxide scavenger to a predetermined temperature; a cooling gas introduction port which introduces a scavenger cooling gas used when cooling the carbon dioxide scavenger; and a moisture mixing part which adds moisture to a gas for nitrogen oxide desorption used in desorption of nitrogen oxides from the carbon dioxide scavenger.

Abstract: The invention provides a negative electrode material for lithium ion secondary battery, including a composite particle of a first particle containing a carbonic substance A and a second particle containing silicon, which are combined with a carbonic substance B, wherein, when a cross-section of the composite particle is observed with respect to: the content of silicon atom in a core region in a circle having a center thereof on the midpoint of the major axis, which constitutes the maximum length, and having a radius of ? of the length of the minor axis orthogonally intersecting the major axis at the midpoint thereof, and the content thereof in a rim region extending from the circumference to a depth of ? of the length of the minor axis, the ratio of the content in the rim region to that in the core region is 2 or higher.

Abstract: The invention provides a negative electrode material for lithium ion secondary battery, including a composite particle of a first particle containing a carbonic substance A and a second particle containing silicon, which are combined with a carbonic substance B, wherein, when a cross-section of the composite particle is observed with respect to: the content of silicon atom in a core region in a circle having a center thereof on the midpoint of the major axis, which constitutes the maximum length, and having a radius of ? of the length of the minor axis orthogonally intersecting the major axis at the midpoint thereof, and the content thereof in a rim region extending from the circumference to a depth of ? of the length of the minor axis, the ratio of the content in the rim region to that in the core region is 2 or higher.

Abstract: A backlight device with improved efficiency in the utilization of light and a liquid crystal display device providing this backlight device are provided, the backlight device comprising at least a light source 2, a light guide plate 1 and a reflector 10, in which the light guide plate 1 further provides an entry face 5 into which light from the light source is incident, a lower face 4 substantially perpendicular to the entry face 5 and that opposes the reflector 10, and an upper face 3 that opposes the lower face 4, and reflective elements 6 that are capable of reflecting such that light is emitted from the lower face 4 toward the reflector 10 are disposed on the upper face 3 of the light guide plate.

Abstract: A backlight device with improved efficiency in the utilization of light and a liquid crystal display device providing this backlight device are provided, the backlight device comprising at least a light source 2, a light guide plate 1 and a reflector 10, in which the light guide plate 1 further provides an entry face 5 into which light from the light source is incident, a lower face 4 substantially perpendicular to the entry face 5 and that opposes the reflector 10, and an upper face 3 that opposes the lower face 4, and reflective elements 6 that are capable of reflecting such that light is emitted from the lower face 4 toward the reflector 10 are disposed on the upper face 3 of the light guide plate.

Abstract: A silica glass production process that can prevent cracks from occurring during the step of gel drying. In a process for producing silica glass, comprising the steps of subjecting a partial polycondensation product of alkoxysilane to hydrolysis in the presence of a solvent, an organic polymeric compound and a basic catalyst to form a sol, making the sol into a gel, drying the gel to form a dry gel, and firing the dry gel to obtain a glass, a salt is caused to exist in a concentration not less than 1.times.10.sup.-4 mol based on 100 g of the partial polycondensation product of alkoxysilane in the step of subjecting the partial polycondensation product of alkoxysilane to hydrolysis to form a sol.