摘要:
A process for recovering uranium and/or thorium from a liquid containing uranium and/or thorium is disclosed, which comprises making a precipitate composed mainly of amorphous silica formed by adding water glass to the liquid containing uranium and/or thorium, capturing the uranium and/or thorium in the liquid by the precipitate, treating the precipitate with acid to elute the captured uranium and/or thorium, adding ammonia or hydrogen peroxide to an acidic solution containing the eluted uranium and/or thorium to form a precipitate composed of ammonium salt or peroxide of the uranium and/or thorium, and filtering out the ammonium salt or peroxide precipitate. Thus, high purity solid uranium and/or thorium reutilizable for manufacture of nuclear fuel material can be recovered in high yield.
摘要:
A compound shown by the following formula (1) can be used as a material for a radiation-sensitive composition capable of forming a resist film which effectively responds to electron beams or the like, exhibits low roughness, and can form a high precision minute pattern in a stable manner.
摘要:
The invention provides agents for phase-adjusting or enhancing the amplitude of an endogenous melatonin secretion rhythm and for improving a circadian rhythm, which may be taken daily and continuously, have excellent safety, and may effectively prevent or ameliorate disorders of an endogenous melatonin secretion rhythm or of a circadian rhythm without administration of exogenous melatonin, as well as functional food containing such an agent, which may prevent or ameliorate various symptoms, such as sleep disorder or prolonged sleep latency. The agent for phase-adjusting or enhancing the amplitude of an endogenous melatonin secretion rhythm according to the invention contains whey as the active component. The functional food for improving an endogenous melatonin secretion rhythm according to the invention contains the agent for phase-adjusting or enhancing the amplitude of an endogenous melatonin secretion rhythm. The functional food for improving a circadian rhythm contains the agent for improving a circadian rhythm.
摘要:
A pattern formation method suitable for forming micro-patterns using electron beams (EB), X-rays, or extreme ultraviolet radiation (EUV) is provided. The method includes the following steps in the following order: (1) a step of forming and curing a under-layer film containing a radiation-sensitive acid generator which generates an acid upon exposure to radiation on a substrate, (2) a step of irradiating the under-layer film with radiation through a mask to cause an acid to be selectively generated in the exposed area of the under-layer film, (3) a step of forming an upper-layer film which does not contain a radiation-sensitive acid generator, but contains a composition capable of polymerization or crosslinking by the action of an acid, (4) a step of forming a cured film by polymerization or crosslinking selectively in the area of the upper-layer film corresponding to the area of the under-layer film in which the acid has been generated, and (5) a step of removing the area of the upper-layer film corresponding to the area of the under-layer film in which the acid has not been generated.
摘要:
Disclosed are agents for phase-adjusting or enhancing the amplitude of an endogenous melatonin secretion rhythm and for improving a circadian rhythm, as well as functional food containing such an agent, which may prevent or ameliorate various symptoms, such as sleep disorder or prolonged sleep latency. The agent contains whey as the active component.
摘要:
A copolymer is provided which exhibits improved resolution, sensitivity, and exposure latitude and excels in pattern collapse margin. The copolymer contains a recurring unit which is hydrolyzed completely an acid-labile group with an acid after copolymerizing a monomer of the following formula(1) and a recurring unit which is hydrolyzed partially acid-labile group with an acid after copolymerizing a monomer of the following formula (2), wherein R1 represents a hydrogen atom or a methyl group, and R2 and R3 represent saturated hydrocarbon groups having 1-4 carbon atoms or bond together to form a cyclic ether having 3-7 carbon atoms, wherein R1′ represents a hydrogen atom or a methyl group, and R4, R5, and R6 represent saturated hydrocarbon groups having 1-4 carbon atoms.
摘要:
A radiation-sensitive composition contains (A) a low-molecular-weight compound having one or more acid-dissociable groups which decompose by the action of an acid to enhance solubility in an alkaline developing solution and one or more radiation-sensitive acid-generating groups which generate an acid upon application of an active ray or radiation per molecule, and having a polystyrene-reduced number-average molecular weight (Mn) measured by gel permeation chromatography (GPC) of 500 to 4,000, and (B) a solvent.
摘要:
A compound shown by the following formula (1) can be used as a material for a radiation-sensitive composition capable of forming a resist film which effectively responds to electron beams or the like, exhibits low roughness, and can form a high precision minute pattern in a stable manner.
摘要:
A method for forming a pattern contains (1) a step of forming an underlayer film containing (A) a radiation-sensitive acid generator capable of generating an acid upon exposure to radiation rays or (B) a radiation-sensitive base generator capable of generating a base upon exposure to radiation rays on a substrate; (2) a step of irradiating the underlayer film with radiation rays through a mask with a predetermined pattern to obtain an exposed underlayer film portion having been selectively exposed through the predetermined pattern; (3) a step of forming (C) an organic thin film on the underlayer film so as to attain chemical bonding of the exposed underlayer film portion with the organic thin-film formed on the exposed underlayer film portion; and (4) a step of removing the organic thin film formed on areas of the underlayer film other than the exposed underlayer film portion.