Abstract: A fuel injection valve has a single pipe member made of composite magnetic material which can be processed to form ferro-magnetic structures and non-magnetic structures. A magnetic fuel connector, a magnetic valve body, a nonmagnetic intermediate pipe are formed in the single pipe member. An electromagnetic solenoid is disposed around the intermediate pipe, and a needle valve is disposed in the valve body. A magnetic stationary core is disposed inside the fuel connector, and a magnetic movable core is disposed inside the valve body in a magnetic circuit composed of the solenoid, the fuel connector, the stationary core and the valve body.

Abstract: The invention provides an anti Derf II monoclonal antibody selectively recognizing Derf II and belonging to an IgG or IgM class, the antibody being obtained by immunizing a mammal with Derf II antigen, which is derived from Dermatophagoides farinae.

Abstract: An electromagnetic fuel injection valve for an internal combustion engine having a housing which houses a valve, a needle valve element, a movable core, an electromagnetic actuator and spacer. The housing is made of magnetic material forms a magnetic flux circuit with the electromagnetic actuator and the movable core. The cylindrical housing is made of a plate material which comprises a portion facing the movable core, and the portion has a substantially minimum thickness to actuate the movable core.

Abstract: This invention relates to a method for determining an enzyme-, an enzyme inhibitor-, an enzyme activator-, or zymogen-activity, which comprises allowing the enzyme to react with a substrate of the formula ##STR1## (wherein R.sub.1 represents an amino acid of an oligopeptide combined in the form of ester through the C-terminal carboxyl group of said amino acid or oligopeptide and R.sub.2 represents a hydrogen or bromine atom) to hydrolyze the substrate, then allowing the hydrolysis product of the formula ##STR2## to react with a FR-ITR salt [Fast Red-ITR salt (N,N'-diethyl-4-methoxymetanilamide diazonium salt)] to form a pigment, and determining the pigment.

Abstract: A device for preventing a substrate from jamming in a copier includes a guide member that directs a substrate from a substrate supply tray to a photosensitive member. The guide member is adapted to be vibrated by a vibration generator in order to prevent substrates passing through the guide member from jamming.