Abstract: In at least some implementations, a carburetor includes a body, a fuel pump diaphragm and a pressure pulse passage. The fuel pump diaphragm is carried by the body and defines in part a fuel chamber on one side of the fuel pump diaphragm and a pressure pulse chamber on the other side of the fuel pump diaphragm. The pressure pulse passage communicates the pressure pulse chamber with a pressure pulse source to provide pressure pulses in the pressure pulse chamber to actuate the fuel pump diaphragm. The pressure pulse passage includes an inlet communicating with a passage in which pressure pulses are present and the inlet is spaced from a surface defining the passage in which pressure pulses are present.

Abstract: A method for producing an optically active ?-trifluoromethyl-?-amino acid derivative, the method including: allowing a compound represented by the following General Formula (1) and a compound represented by the following General Formula (2) to react in the presence of a copper-optically active phosphine complex obtained from a copper compound and an optically active phosphine compound, to thereby obtain an optically active ?-trifluoromethyl-?-amino acid derivative represented by the following General Formula (3):

Abstract: A method for producing a compound represented by General Formula (1), the method including: reacting a compound represented by General Formula (3) and a compound represented by General Formula (4): where R1 and R2 each represent aliphatic group which may have substituent, or aromatic group which may have substituent (with the proviso that R1 and R2 are different groups), R3 represents aromatic group which may have substituent, and R4 represents aliphatic group which may have substituent, or aromatic group which may have substituent, where R1 and R2 each represent aliphatic group which may have substituent, or aromatic group which may have substituent (with the proviso that R1 and R2 are different groups), and R3 represents aromatic group which may have substituent, where R4 represents aliphatic group which may have substituent, or aromatic group which may have substituent.

Abstract: The invention provides an evaluation method capable of objectively evaluating average visual perception for a comparatively long period of time when a subject looks through an eyeglass lens to be evaluated, time-dependent change in visual perception, and visual perception when looking with both eyes, and the invention provides a design method, and the invention provides a calculation method for calculating characteristics of visual perception of the subject when viewing an object through a lens.

Abstract: A method for producing a compound represented by General Formula (1), the method including: reacting a compound represented by General Formula (3) and a compound represented by General Formula (4): where R1 and R2 each represent aliphatic group which may have substituent, or aromatic group which may have substituent (with the proviso that R1 and R2 are different groups), R3 represents aromatic group which may have substituent, and R4 represents aliphatic group which may have substituent, or aromatic group which may have substituent, where R1 and R2 each represent aliphatic group which may have substituent, or aromatic group which may have substituent (with the proviso that R1 and R2 are different groups), and R3 represents aromatic group which may have substituent, where R4 represents aliphatic group which may have substituent, or aromatic group which may have substituent.

Abstract: A catalyst, which is obtained by mixing a compound expressed by the following Structural Formula (1), a nitroalkane compound, a neodymium-containing compound, a sodium-containing compound, and a carbon structure:

Abstract: A compound represented by the following General Formula (1): where R1 represents a protective group for a hydroxyl group or a hydrogen atom, and R2 represents a methyl group or an ethyl group.

Abstract: A compound represented by the following General Formula (1): where R1 represents a protective group for a hydroxyl group or a hydrogen atom, and R2 represents a methyl group or an ethyl group.

Abstract: A compound represented by the following General Formula (1): where R1 represents a protective group for a hydroxyl group or a hydrogen atom, and R2 represents a methyl group or an ethyl group.

Abstract: A compound represented by the following General Formula (1): where R1 represents a protective group for a hydroxyl group or a hydrogen atom, and R2 represents a methyl group or an ethyl group.

Abstract: A thioamide compound represented by the following general formula (1): wherein, in the general formula (1), R1 represents one of —OR11 and —NR12R13; R2 and R3 each independently represent one of a protecting group of an amide group and a hydrogen atom; the R11 represents one of a protecting group of a hydroxyl group and a hydrogen atom; and the R12 and R13 each independently represent one of a protecting group of an amino group and a hydrogen atom, where the R12 and R13 may together form a protecting group having a cyclic structure.

Abstract: A thioamide compound represented by the following general formula (1); wherein, in the general formula (1), R1 represents one of —OR11 and —NR12R13; R2 and R3 each independently represent one of a protecting group of an amide group and a hydrogen atom; the R11 represents one of a protecting group of a hydroxyl group and a hydrogen atom; and the R12 and R13 each independently represent one of a protecting group of an amino group and a hydrogen atom, where the R12 and R13 may together form a protecting group having a cyclic structure.

Abstract: A carburetor provided on an intake pipe is disclosed. The carburetor includes a rotary cock attached to a fuel chamber. The cock is used for opening and closing fuel channels and drain channels. The cock has a rotational axis inclined relative to the central axis of the intake pipe.

Abstract: A carburetor provided on an intake pipe is disclosed. The carburetor includes a rotary cock attached to a fuel chamber. The cock is used for opening and closing fuel channels and drain channels. The cock has a rotational axis inclined relative to the central axis of the intake pipe.

Abstract: One implementation of a carburetor may have a fuel bowl in which a supply of fuel is received for delivery from the carburetor to an engine, and may include a valve rotatably supported by a body, an operating lever coupled to the valve, and a stopper. The operating lever may move the valve between a running position in which fuel flows through the valve in a first direction and into the fuel bowl, a stop position in which fuel does not flow either into or out of the fuel bowl through the valve, and a drainage position in which fuel flows in a second direction out of the fuel bowl through the valve. The stopper may be moveable between a non-permissive state in which the operating lever is not permitted to move in a first direction from one of the running position and the stop position to the other position, and a permissive state in which the operating lever is allowed to move in the first direction.