Abstract: A compound represented by formula (I), its racemic form, or their salt, wherein X represents an oxygen atom, a nitrogen atom or a sulfur atom; R1 represents an unsaturated aliphatic hydrocarbon group; R2 represents a saturated or unsaturated aliphatic hydrocarbon group; and R3 represents choline, ethanolamine, inositol or serine.

Abstract: A method for assessing aging of erythrocytes that includes preparing an erythrocyte suspension from a blood sample; allowing the erythrocyte suspension to pass through a first filter, separating aged erythrocytes that do not pass through the first filter, and non-aged erythrocytes that pass through the first filter, and to calculate a deformability of erythrocytes, allowing the separated non-aged erythrocyte suspension to pass through a second filter having micropores which diameter is smaller than the first filter, separating mild aged erythrocytes that do not pass through the second filter and juvenile erythrocytes that pass through the second filter, and to calculate a deformability of the non-aged erythrocytes; and assessing aging of erythrocytes, using the deformability of erythrocyte and the deformability of non-aged erythrocyte.

Abstract: A compound presented by the general formula (1), its racemic form, or their salt thereof: wherein in general formula (1), X represents an oxygen atom, nitrogen atom, sulfur atom, or carbon atom, R1 represents R1a—Y—R1b, wherein R1a and R1b independently represent a saturated or unsaturated aliphatic hydrocarbon group, aromatic group, heterocyclic group, or a combination thereof, and Y represents an oxygen atom, nitrogen atom, sulfur atom, or carbon atom, R2 independently represents a saturated or unsaturated aliphatic hydrocarbon group, and R3 represents choline, ethanolamine, inositol, or serine.

Abstract: A composition for ameliorating periodontal tissue containing plasmalogen extracted from animal tissues such as shellfish, sea squirts and birds.

Abstract: A composition for ameliorating skin condition having a collagen production promoting effect, a composition for ameliorating skin resilience, a composition for ameliorating skin wrinkles, a composition for ameliorating skin sagging, and a composition for promoting collagen production.

Abstract: A composition having hair growth and/hair restoration effect that includes plasmalogen extracted from tissues of animal such as shellfish, sea squirt, and birds, and that can be used as external preparation or oral preparation.

Abstract: It is a composition for enhancing immune function, or a composition for activating natural killer cells, comprising plasmalogen.

Abstract: A method for manufacturing a functional material that contains plasmalogen, the method including treating an animal tissue containing plasmalogen with protease, and extracting the animal tissue treated with protease with an extraction liquid containing ethanol.

Abstract: A method for manufacturing a functional material that contains plasmalogen, the method including treating an animal tissue containing plasmalogen with protease, and extracting the animal tissue treated with protease with an extraction liquid containing ethanol.

Abstract: A method for assessing aging of erythrocytes that includes preparing an erythrocyte suspension from a blood sample; a allowing the erythrocyte suspension to pass through a first filter, separating aged erythrocytes that do not pass through the first filter, and non-aged erythrocytes that pass through the first filter, and to calculate a deformability of erythrocytes, allowing the separated non-aged erythrocyte suspension to pass through a second filter having micropores which diameter is smaller than the first filter, separating mild aged erythrocytes that do not pass through the second filter and juvenile erythrocytes that pass through the second filter, and to calculate a deformability of the non-aged erythrocytes; and assessing aging of erythrocytes, using the deformability of erythrocyte and the deformability of non-aged erythrocyte.

Abstract: A compound presented by the following Chemical Formula 1, a racemic form, or a salt thereof: wherein, X represents an oxygen atom, a nitrogen atom, a sulfur atom, or a carbon atom, R1 represents R1a—Y—R1b (wherein R1a and R1b each independently represent a saturated or unsaturated aliphatic hydrocarbon group, an aromatic group, a heterocyclic group, or a combination thereof, and Y represents an oxygen atom, a nitrogen atom, a sulfur atom, or a carbon atom), R2 represents a saturated or unsaturated aliphatic hydrocarbon group, and R3 represents choline, ethanolamine, inositol, or serine.

Abstract: [PROBLEM TO BE SOLVED] It enables any superior ether phospholipids to the conventional ones and a method for producing the same in an easy manner on a massive scale, in light of effects of treating and improving brain diseases such as Alzheimer's disease, Parkinson disease, depression and schizophrenia, metabolic diseases such as diabetes, various infectious diseases, and immune disorders. [SOLUTION] Ether phospholipids are obtained from bivalve tissues such as clams and corbicula by extraction processing. The ether phospholipids exhibit significantly superior effects of the above as compared to the conventional ether phospholipids derived from chicken tissues.

Abstract: The present invention relates to uses of ether phospholipids in treating and preventing various diseases, including, but not limited to, neurodegenerative or brain diseases such as Alzheimer's disease, cognitive impairment, brain fatigue, Parkinson disease, depression, anxiety disorder, insomnia and schizophrenia; metabolic syndrome such as diabetes and obesity; various infectious diseases such as viral diseases; diseases related to inflammation; heart diseases, and immune disorders. Preferably, the ether phospholipids are derived from extracting bivalves, which provides superior efficacies in treating and preventing the diseases.

Abstract: The present invention provides methods for quantifying an amount of plasmalogens in samples with high accuracy in an easy, convenient and inexpensive manner by using a hydrolysis processing to samples and a lipid extraction followed by the measurement using High Performance Liquid Chromatography (HPLC) with Evaporative Light Scattering Detector (ELSD) or Mass Spectrometer (MS), a fluorescence plate reader or a plate reader. The present invention also relates to a method for examining a subject by using the above method, a biomarker for disease detection, a method for using the biomarker for the disease detection, as well as a kit for the disease detection.

Abstract: The present invention provides methods for quantifying an amount of plasmalogens in samples with high accuracy in an easy, convenient and inexpensive manner by using a hydrolysis processing to samples and a lipid extraction followed by the measurement using High Performance Liquid Chromatography (HPLC) with Evaporative Light Scattering Detector (ELSD) or Mass Spectrometer (MS), a fluorescence plate reader or a plate reader. The present invention also relates to a method for examining a subject by using the above method, a biomarker for disease detection, a method for using the biomarker for the disease detection, as well as a kit for the disease detection.

Abstract: To provide an ether-type glycerophospholipid-containing composition that has excellent heat stability and also has oxidation stability and storage stability. An ether-type glycerophospholipid-containing composition that comprises not more than 20 mass % of an ether-type glycerophospholipid and not less than 80 mass % of a cyclodextrin. Owing to this constitution, the ether-type glycerophospholipid is clathrated in the cyclodextrin. Thus, the ether-type glycerophospholipid-containing composition has highly excellent heat stability as well as temporal stability such as oxidation stability and storage stability even in a powdery form.

Abstract: The present invention relates to uses of ether phospholipids in treating and preventing various diseases, including, but not limited to, neurodegenerative or brain diseases such as Alzheimer's disease, cognitive impairment, brain fatigue, Parkinson disease, depression, anxiety disorder, insomnia and schizophrenia; metabolic syndrome such as diabetes and obesity; various infectious diseases such as viral diseases; diseases related to inflammation; heart diseases, and immune disorders. Preferably, the ether phospholipids are derived from extracting bivalves, which provides superior efficacies in treating and preventing the diseases.

Abstract: [PROBLEM TO BE SOLVED] It enables any superior ether phospholipids to the conventional ones and a method for producing the same in an easy manner on a massive scale, in light of effects of treating and improving brain diseases such as Alzheimer's disease, Parkinson disease, depression and schizophrenia, metabolic diseases such as diabetes, various infectious diseases, and immune disorders. [SOLUTION] Ether phospholipids are obtained from bivalve tissues such as clams and corbicula by extraction processing. The ether phospholipids exhibit significantly superior effects of the above as compared to the conventional ether phospholipids derived from chicken tissues.

Abstract: The present invention provides methods for quantifying an amount of plasmalogens in samples with high accuracy in an easy, convenient and inexpensive manner by using a hydrolysis processing to samples and a lipid extraction followed by the measurement using High Performance Liquid Chromatography (HPLC) with Evaporative Light Scattering Detector (ELSD) or Mass Spectrometer (MS), a fluorescence plate reader or a plate reader. The present invention also relates to a method for examining a subject by using the above method, a biomarker for disease detection, a method for using the biomarker for the disease detection, as well as a kit for the disease detection.

Abstract: Provided is a novel hair growth and hair restoration material having excellent efficacy in hair growth and hair restoration for both men and women, even when the components thereof are at ultra-dilute concentrations; the hair growth and hair restoration material being characterized in containing a sterol glucopyranoside, preferably a cholesteryl glucopyranoside, represented by general formula (I). (In the formula, Z represents a sterol residue from which the hydroxyl group attached to the 3-position of a cyclopentanohydrophenanthrene ring has been removed.