摘要:
A tyrosinase activity inhibitor and an ameliorant for facial blood flow that are excellent in terms of safety, and medicinal compositions, food compositions, and cosmetic preparations that contain the inhibitor and the ameliorant as active ingredients are provided. A tyrosinase activity inhibitor and an ameliorant for facial blood flow that contain anthocyan obtained by concentration or extraction of plant material, and medicinal compositions, food compositions, and cosmetic preparations that have an inhibitory action on tyrosinase activity and ameliorating action on facial blood flow are provided.
摘要:
Provided are a process for producing purified anthocyanidin glucoside in which a rhamnose end of anthocyanidin rutinoside is cleaved using rhamnosidase to convert the anthocyanidin rutinoside component into anthocyanidin glucoside, the anthocyanidin glucoside component being then purified and isolated; or a crystalline anthocyanidin glucoside salt obtained by further crystallizing the purified anthocyanidin glucoside and a process for producing the same.Also provided are a process for producing purified anthocyanidin rutinoside in which a glucose end of anthocyanidin glucoside is cleaved using β-glucosidase to degrade and remove the end, the anthocyanidin rutinoside component being then purified and isolated; or a crystalline anthocyanidin rutinoside salt obtained by further crystallizing the purified anthocyanidin rutinoside and a process for producing the same.
摘要:
An agent for preventing and curing the hindrance of ischemic reperfusiton is disclosed which has as an active component thereof a chromanol glycoside represented by the following general formula: [wherein R1, R2, R3, and R4 independently denote a hydrogen atom or a lower alkyl group, R5 denotes a hydrogen atom, a lower alkyl group, or a lower acyl group, X denotes a monosaccharide residue or an oligosaccharide residue which may have a lower alkyl group or a lower acyl group substituted for the hydrogen atom of the hydroxyl group of the saccharide residue, n denotes an integer of 0-6, and m denotes an integer of 1-6]. The agent, even in a small dosage, acts safely and effectively on the affected part and allows the hindrances of ischemic reperfusion induced in heart, stomach, small intestine, liver, spleen, kidney, brain, and skin, and the hindrance induced during the transplantation of an internal organ to be prevented and cured.
摘要:
The present disclosure provides a preparation method of peonidin-3-O-(6-p-coumaryl)glucoside and malvidin-3-O-(6-p-coumaryl)glucoside by separation. In the present disclosure, the preparation method includes alcohol extraction and concentration, macroporous resin purification, extraction, purification by preparative liquid chromatography, and separation by high-speed countercurrent chromatography (HSCCC). In this way, two high-purity monomers, peonidin-acylated anthocyanin and malvidin-acylated anthocyanin, are obtained by separation and purification from grapes. With the preparation method, at least 60 mg of the peonidin-3-O-(6-p-coumaryl)glucoside and at least 200 mg of the malvidin-3-O-(6-p-coumaryl)glucoside can be obtained from 10 kg of grape skins, both of which have a purity of not less than 98%. The preparation method has simple operations, a high processing capacity, and desirable repeatability, and provides a new idea for the development and utilization of grape resources.
摘要:
An object of the present invention is to provide a sugar donating reagent comprising a sugar donor compound other than a sugar nucleotide and an enzyme capable of catalyzing a glycosyl transfer reaction using a sugar donor compound other than a sugar nucleotide. The present invention provides the following: a sugar donating reagent containing a compound of formula (A): wherein R1 is independently selected from hydrogen, or C1-6 alkyl, C2-6 alkenyl, and C2-6 alkynyl in which each of the groups is unsubstituted or substituted with one or more groups selected from OH, F, Cl, Br, I, CN, NO2, and SO2, n is 0, 1, 2, 3, 4 or 5, m is 0 or 1, and X represents a monosaccharide bound via a β bond on its anomeric carbon; a glycosyltransferase capable of catalyzing a glycosyl transfer reaction using the sugar donor; and a glycosyltransferase gene comprising DNA encoding the glycosyltransferase.
摘要:
The invention provides a method for in vitro formation of anthocyanic vacuolar inclusion (AVI)-like structures, the method comprising the step of combining at least one anthocyanin, and b) at least one lipid. The invention also provides AVI-like structures produced by the method of the invention, compositions comprising such AVI-like structures, and uses of such AVI-like structures.
摘要:
This invention provides a novel chromanol glycoside which is a water soluble antioxidant excellent in heat and pH stability and production method thereof. It is a chromanol glycoside represented by the general formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 independently are a hydrogen atom or a lower alkyl group, R.sup.5 is a hydrogen atom, a lower alkyl group, or a lower acyl group, X is a monosaccharide residue or an oligosacoharide residue, providing the hydrogen atom of the hydroxyl group of saccharide residue may be substituted by a lower alkyl group or a lower acyl group, n is an integer in the range of 0 to 4, and m is an integer in the range of 1 to 6.
摘要:
Tocopheryl glycosides of the general formula ##STR1## or of the general formula ##STR2## where n can adopt values of 0-6 and where R represents a radical from the group consisting of H, branched and unbranched alkyl of 1-18 carbon atoms, branched and unbranched acyl of 1-18 carbon atoms, and where R within one molecule can be identical in all positions of tie glycosyl groups, but can also adopt different meanings within one molecule, such that it is possible within one molecule to choose any desired combinations of the radicals represented.
摘要:
The present invention relates to novel tocopheryl oligosaccharides, acylated tocopheryl oligosaccharides, sulfated tocopheryl oligosaccharides, and antiviral agents including the sulfated tocopheryl oligosaccharides as active ingredients. In the tocopheryl oligosaccharide, the hydrogen atom of the hydroxy group at the 1-position in the terminal sugar moiety of an oligosaccharide which consists of 3.about.20 of identical or different repeating monosaccharide units selected from the group consisting of glucose, galactose, mannose, talose, idose, altrose, allose, glucose, xylose, arabinose, rhamnose, fucose, and fructose, which are glycoside-linked, is substituted by a tocopherol group. In the acylated tocopheryl oligosaccharides, each of any hydroxy group of the sugar moiety, other than the hydroxy group at the 1-position in the terminal sugar moiety of the oligosaccharide described above, is protected by an acyl group. The antiviral agents including the sulfated tocopheryl oligosaccharides or the biologically acceptable salt of the same as active ingredients have low toxicities and exhibit improved antiviral action, especially against the Human Immunodeficiency Virus.