A compound represented by the following formula has a high anti-allergy activity. R.sup.1 represents a substituted or unsubstituted acyloxy group, or a substituted or unsubstituted acylamino group, R.sup.2 represents a substituted or unsubstituted alkyl group. ##STR00001##

Disclosed is a method for producing a protease degradation composition by degrading a composition containing a hyaluronic acid and a protein with a protease, in the presence of an ascorbic acid, an ascorbate or a salt thereof. The composition produced according to the method has a high fibroblast proliferation promoting effect and a high collagen production promoting effect.

Disclosed is a method for producing a protease degradation composition by degrading a composition containing a hyaluronic acid and a protein with a protease, in the presence of an ascorbic acid, an ascorbate or a salt thereof. The composition produced according to the method has a high fibroblast proliferation promoting effect and a high collagen production promoting effect.

Disclosed is a liquid production method and device for producing a liquid containing water-soluble components. The liquid production method includes extracting water-soluble components from a biological tissue, using a liquefied gas, to yield an extraction liquid, and vaporizing the liquefied gas from the extraction liquid obtained in the extracting to concentrate the extraction liquid.

Disclosed is a liquid production method and device for producing a liquid containing water-soluble components. The liquid production method includes extracting water-soluble components from a biological tissue, using a liquefied gas, to yield an extraction liquid, and vaporizing the liquefied gas from the extraction liquid obtained in the extracting to concentrate the extraction liquid.

The invention provides methods and reagents for detecting luciferase in biological samples. The methods and reagents of the present invention allow detecting fungal luciferase or a functional analog thereof.

The invention provides methods and reagents for detecting luciferase in biological samples. The methods and reagents of the present invention allow detecting fungal luciferase or a functional analog thereof.

A zinc ascorbate glycinate co-salt having a formula of MC8H11NO8 and a suggested structure of: Formula (I). Where M is Ca, Mg, or Zn. The divalent metal ascorbate glycinate co-salt is formed as a powder having a metal content of about 8% to about 21% on an anhydrous basis and containing between 0.0-20.0% water.

A zinc ascorbate glycinate co-salt having a formula of MC8H11NO8 and a suggested structure of: Formula (I). Where M is Ca, Mg, or Zn. The divalent metal ascorbate glycinate co-salt is formed as a powder having a metal content of about 8% to about 21% on an anhydrous basis and containing between 0.0-20.0% water.

The present application provides antioxidant substances having enediol structure that can prevent the decomposition of biopyrrin. Agents for preventing decomposition of biopyrrin include an antioxidant substance having enediol structure, or a salt, an ester or a glycoside thereof, or a solvate, a stereoisomer or a tautomer thereof. In a biological sample to which the agent for preventing decomposition of the invention is added, the decomposition of biopyrrin can be prevented at ambient temperature or lower for a long term.