摘要:
It is an object to provide an L-ascorbic acid derivative which can keep the L-ascorbic acid stable to heat and light and thus has a long shelf life, which is high in permeability into the skin, which can be quickly hydrolyzed by phosphatase, an enzyme that is ubiquitous in vivo, and which exhibits physiological activities that are inherent to L-ascorbic acid and beneficial to health, a method for producing such an L-ascorbic acid derivative, and a skin-whitening cosmetic material.There is provided an ascorbic acid derivative comprising an L-ascorbic acid-2-phosphate ester or a salt thereof wherein the phosphate ester has a branched alkyl group, the L-ascorbic acid-2-phosphate ester being of formula [13]. The ascorbic acid derivative is produced by a method comprising reacting a branched alkanol with phosphorus oxychloride to synthesize monoalkyldichlorophosphate or dialkylmonochlorophosphate, reacting the thus obtained substance with 5,6-O-isopropylidene-L-ascorbic acid obtained by reacting L-ascorbic acid with acetone, and subjecting the thus obtained substance to acid hydrolysis. There is also provided a cosmetic material containing such an ascorbic acid derivative by 0.05 to 80 percent by weight. (wherein each of R1 and R2 is a hydrogen (H) atom or an alkyl group having branches and including 3 to 30 carbon atoms, but not both of R1 and R2 are hydrogen (H) atoms).
摘要:
It is an object to provide an L-ascorbic acid derivative which can keep the L-ascorbic acid stable to heat and light and thus has a long shelf life, which is high in permeability into the skin, which can be quickly hydrolyzed by phosphatase, an enzyme that is ubiquitous in vivo, and which exhibits physiological activities that are inherent to L-ascorbic acid and beneficial to health, a method for producing such an L-ascorbic acid derivative, and a skin-whitening cosmetic material.There is provided an ascorbic acid derivative comprising an L-ascorbic acid-2-phosphate ester or a salt thereof wherein the phosphate ester has a branched alkyl group, the L-ascorbic acid-2-phosphate ester being of formula [13]. The ascorbic acid derivative is produced by a method comprising reacting a branched alkanol with phosphorus oxychloride to synthesize monoalkyldichlorophosphate or dialkylmonochlorophosphate, reacting the thus obtained substance with 5,6-O-isopropylidene-L-ascorbic acid obtained by reacting L-ascorbic acid with acetone, and subjecting the thus obtained substance to acid hydrolysis. There is also provided a cosmetic material containing such an ascorbic acid derivative by 0.05 to 80 percent by weight. (wherein each of R1 and R2 is a hydrogen (H) atom or an alkyl group having branches and including 3 to 30 carbon atoms, but not both of R1 and R2 are hydrogen (H) atoms)
摘要:
It is an object to provide an L-ascorbic acid derivative which can keep the L-ascorbic acid stable to heat and light and thus has a long shelf life, which is high in permeability into the skin, which can be quickly hydrolyzed by phosphatase, an enzyme that is ubiquitous in vivo, and which exhibits physiological activities that are inherent to L-ascorbic acid and beneficial to health, a method for producing such an L-ascorbic acid derivative, and a skin-whitening cosmetic material. There is provided an ascorbic acid derivative comprising an L-ascorbic acid-2-phosphate ester or a salt thereof wherein the phosphate ester has a branched alkyl group, the L-ascorbic acid-2-phosphate ester being of formula [13]. The ascorbic acid derivative is produced by a method comprising reacting a branched alkanol with phosphorus oxychloride to synthesize monoalkyldichlorophosphate or dialkylmonochlorophosphate, reacting the thus obtained substance with 5,6-O-isopropylidene-L-ascorbic acid obtained by reacting L-ascorbic acid with acetone, and subjecting the thus obtained substance to acid hydrolysis. There is also provided a cosmetic material containing such an ascorbic acid derivative by 0.05 to 80 percent by weight. (wherein each of R1 and R2 is a hydrogen (H) atom or an alkyl group having branches and including 3 to 30 carbon atoms, but not both of R1 and R2 are hydrogen (H) atoms)
摘要:
It is an object to provide an L-ascorbic acid derivative which can keep the L-ascorbic acid stable to heat and light and thus has a long shelf life, which is high in permeability into the skin, which can be quickly hydrolyzed by phosphatase, an enzyme that is ubiquitous in vivo, and which exhibits physiological activities that are inherent to L-ascorbic acid and beneficial to health, a method for producing such an L-ascorbic acid derivative, and a skin-whitening cosmetic material.There is provided an ascorbic acid derivative comprising an L-ascorbic acid-2-phosphate ester or a salt thereof wherein the phosphate ester has a branched alkyl group, the L-ascorbic acid-2-phosphate ester being of formula [13]. The ascorbic acid derivative is produced by a method comprising reacting a branched alkanol with phosphorus oxychloride to synthesize monoalkyldichlorophosphate or dialkylmonochlorophosphate, reacting the thus obtained substance with 5,6-O-isopropylidene-L-ascorbic acid obtained by reacting L-ascorbic acid with acetone, and subjecting the thus obtained substance to acid hydrolysis. There is also provided a cosmetic material containing such an ascorbic acid derivative by 0.05 to 80 percent by weight. (wherein each of R1 and R2 is a hydrogen (H) atom or an alkyl group having branches and including 3 to 30 carbon atoms, but not both of R1 and R2 are hydrogen (H) atoms)
摘要:
A screw-drive conveying apparatus has on a conveying traveling body side, a first driven roller pair having a shorter distance between two driven front and rear rollers and a second driven roller pair having a longer distance between two driven front and rear rollers. A first screw shaft row with which the respective driven rollers of the first driven roller pair are engaged and a second screw shaft row with which the respective driven rollers of the second driven roller pair are engaged are provided on a traveling path side. The length of screw discontinued spaces between both screw shaft rows is equal to the distance between the driven rollers of the driven roller pair engaged with the screw shaft row on the upstream side.
摘要:
An image reading apparatus includes a conveying unit for conveying documents one by one, a first reading unit for optically reading the conveyed document through a first transparent member provided at a first reading position on a conveying path in the conveying unit, a first cleaning unit for cleaning the first transparent member provided at the first reading position, a second reading unit for optically reading the conveyed document through a second transparent member provided at a second reading position on the conveying path in the conveying unit and on a downstream side of the first reading position, and a second cleaning unit for cleaning the second transparent member provided at the second reading position. The second cleaning unit is higher in cleaning ability than the first cleaning unit.
摘要:
A circuit module and a manufacturing method for the same, reduce a possibility that a defect area where an electrically conductive resin is not coated may occur in a shield layer. A mother board is prepared. A plurality of electronic components are mounted on a principal surface of the mother board. An insulator layer is arranged so as to cover the principal surface of the mother board and the electronic components. The insulator layer is cut such that grooves and projections are formed in and on the principal surface of the insulator layer and the insulator layer has a predetermined thickness H. An electrically conductive resin is coated on the principal surface of the insulator layer to form a shield layer. The mother board including the insulator layer and the shield layer both formed thereon is divided to obtain a plurality of circuit modules.
摘要:
A user terminal is connected through the Internet to a server. On the basis of the identification information of the client inputted from the client terminal, the server extracts an service selected by the client from a database for user management, further, extracts calculated maintenance contents for each service from a database for service management and sends them to the user terminal. Thus, the user can collect maintenance contents, such as the staff capable of providing service, the time until the user receives a service, and the charge, so that the user can utilize the information as indications to select an optimal service such as maintenance.
摘要:
In an image reading apparatus, a white reference member for obtaining a reference value used in shading correction in the reading mechanism and an elastic member for cleaning a surface of the transparent member are provided such that respective positions of the white reference member and the elastic member with respect to the transparent member are variable. A controller controls the positions of these members with respect to the transparent member to alternately achieve movement of the white reference member to a position where the white reference member faces the transparent member and movement of the elastic member to a position where the elastic member faces the transparent member. The controller calculates the above reference value using a plurality of detection values read by the reading mechanism through the above positional control.
摘要:
Circuit modules including identification codes and a method of managing them are provided. A module substrate includes signal input output terminals and outer ground terminals provided at the peripheral portions of a surface which becomes a mounting surface when the circuit module is completed. An inner-ground-terminal formation area surrounded by the signal input output terminals and the outer ground terminals includes a plurality of inner ground terminals arranged in a matrix of rows and columns. One of the edge portions is a direction identification area. The inner ground terminal is not provided in the direction identification area, and a first identification code having information about the position of the module substrate is provided in the direction identification area.