摘要:
A valve control device for an internal combustion engine includes a rotational cam shaft disposed on a cylinder head, a first cam provided on the cam shaft, a second cam provided on the cam shaft and having a larger nose portion than that of the first cam, a first rocker arm supported on a first fulcrum so as to be able to oscillate and thereby open or close an intake or exhaust valve by the first cam in response to the rotation of the cam shaft, a second rocker arm supported on a second fulcrum so as to be able to oscillate and thereby open or close an intake or exhaust valve by the second cam in response to the rotation of the cam shaft, and a moving mechanism for selectively moving the second fulcrum so as to control the opening and closing operation of the intake or exhaust valve by the second rocker arm.
摘要:
An inhibitor of the biosynthesis of sugar chains containing sialic acid that is excellent in the suppression of inflammation or allergy, which comprises as an active ingredient a sugar compound of the formula (1): ##STR1## wherein R.sup.1 is a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, a substituted or unsubstituted aromatic hydrocarbon group, a peptide residue or a glycoprotein, and R.sup.2 is a hydrogen atom, a sulfhydryl group, an acyloxy group, an acylthio group, an aryloxy group, an alkyloxy group or a glycothio residue. The inhibitor of the biosynthesis of sugar chains containing sialic acid may be used as a therapeutic agent for inflammation caused by sugar chains containing sialic acid.
摘要:
A hydraulic valve lifter is used in the valve train of an internal combustion engine to take up the lash on operating clearance in the valve train. The valve lifter is comprised of a first cylindrical body member having a top wall, a second cylindrical body member slidably mounted within the first body member and having a bottom wall, a plunger member slidably mounted within the second body member for defining a reservoir chamber and a pressure chamber, a guide member of thick, rigid material fixed in the first body member for guiding the second body member, and a channel member of thin light weight material fixed between the first body member and the guide member for defining an oil channel connected to the reservoir chamber.
摘要:
A hydraulic lifter for an internal combustion engine which includes a cylindrical body installed horizontally or nearly horizontally, having an oil inlet port on the surface of the body; a plunger slidably inserted into the body; a push rod seat inserted into one end of the body in contact with the plunger, having an oil outlet port; an oil reservoir formed by the plunger and a push rod seat; a pressure chamber formed by the internal wall of the body and the end face of the plunger in the other end of the body; a hole for the oil to flow in and out of the reservoir, provided in the vicinity of the junction between the plunger and the push rod seat; a first groove provided on the other surface of the plunger forming at least one turn around the plunger, to connect the oil inlet port mounted on the body with the hole for the oil to flow in and out of the reservoir; and a second groove provided on the outer surface of the push rod seat forming at least one turn around the push rod seat, to connect the hole for the oil to flow in and out of the reservoir with the oil outlet port mounted on the push rod seat.
摘要:
A self-contained hydraulic lash adjuster having a cup-shaped body and a plunger slidably disposed therein is further provided with a flexible diaphragm secured within a reservoir chamber located in the plunger with one side of said diaphragm being exposed to the atmosphere and the other side being disposed in engagement with the oil supply sealed within the hydraulic lash adjuster. An oil passage is provided in the bottom of the plunger to communicate the reservoir chamber with a pressure chamber defined between the bottom of the plunger and the bottom of the body and a one-way check valve is provided to prevent the return flow of oil through the oil passage to the reservoir. A cup-shaped cover member having apertured side walls is located in the bottom of the plunger over the oil passage to prevent the diaphragm from blocking the oil passage upon deformation of the diaphragm.
摘要:
A self-contained hydraulic lash adjuster which does not depend upon any external source of hydraulic fluid in operation is used in the valve trains of internal combustion engines or similar mechanisms in order to take up the lash or operating clearance in the valve trains. In the lash adjuster a transmitting member such as a fulcrum is engaged with a plunger which is slidably mounted in a bore of a lash adjuster body. A clearance is provided between the transmitting member and the body which is smaller than the clearance provided between the transmitting member and the plunger to reduce the frictional wear between the plunger and the body.
摘要:
A self-contained hydraulic lash adjuster, which does not depend upon any external source of hydraulic fluid in operation, is used in the valve trains of internal combustion engines in order to take up the lash or operating clearance in the valve trains. The lash adjuster comprises a cylinder member, a plunger member slidably fitted therein, said cylinder and plunger members defining a fluid pressure chamber between each end wall thereof, said plunger member forming a reservoir chamber therewithin, and an elastic bag member disposed within the reservoir chamber, the inner wall surface of said elastic bag member being normally in communication with atmospheric pressure while the outer wall surface thereof being normally in contact with the fluid in the reservoir chamber.
摘要:
Described is a method of production of saccharides containing sialic acid, wherein .beta.-galactoside-.alpha.-2,6-sialyltransferase is used for linking sialic acid to the 6-position of a galactose residue in a sugar chain of a glycoconjugate or the 6-position of a galactose residue in a free sugar chain, or to the 6-position of a monosaccharide having a hydroxyl group on carbon at the 6-position and being capable of forming an oligosaccharide or a glycoconjugate.
摘要:
Complaint rate calculation means for calculating complaint rates in consideration of thermal feeling entered from vote value input means, a data storage unit for storing complaint rates together with indoor thermal conditions, updating means for calculating a function representing the relationship between thermal conditions and complaint rates in accordance with stored data, and predicted thermal condition calculation means for calculating thermal setting values by substituting entered control information into the function representing the relationship between thermal conditions and complaint rates, can convert a complaint vote of each inhabitant to a characteristic thermal feeling of a group so as to directly reflect the feeling on air-conditioning control.
摘要:
The present invention is drawn to methods of manufacturing a sialic acid derivative suitable for industrial production. With a method of the present invention, Tetra-O-acetylsialic acid (4a) and acetylcytidine-5'-O-amidite (5a) are condensed in the presence of an acid catalyst to obtain a phosphite (6a). The phosphite (6a) is oxidized with t-butylhydroperoxide to obtain a phosphate (9a). The phosphate (9a) is deprotected with an alkali to obtain CMP-sialic acid (1a). ##STR1## The present invention further encompasses a novel sialic acid derivative.