Abstract: Mitomycin derivatives of the formula: ##STR1## wherein X is ##STR2## [wherein R.sub.3 is alkyl, cycloalkyl or optionally substituted phenyl; and R.sub.4 is alkyl or cycloalkyl]; n is an integer of 2 to 8; one of R.sub.1 and R.sub.2 is a hydrogen atom and the other is a carbamoyloxymethyl group, or alternatively R.sub.1 and R.sub.2 may be combined together to form a methylene group (.dbd.CH.sub.2); and Y and Z independently represent hydrogen or methyl;exhibit anti-bacterial and anti-tumor activities.

Abstract: A tool drive includes upper and lower coaxial manually rotatable drive members and a driven tool member at the bottom of the lower drive member. A reversible unidirectional transmissions rotatably couple both the upper and lower drive members to the driven member. The transmission coupling the lower drive member includes a peripheral ratchet formed in the lower inside face of the lower drive member. A double ended pawl rockably carried by the upper drive member with its opposite ends alternatively drive engaging the ratchet so as to provide a ratchet coupling driving in alternative opposite directions. A follower carried by the driven member engages a cam on the pawl to transfer the pawl between opposite drive positions in accordance with the angular directional relationship between the upper drive and driven members.

Abstract: Alkynol type compounds of the following formula (I): ##STR1## [wherein R.sub.1 -R.sub.5 and R.sub.6 -R.sub.10 each represent hydrogen atoms or lower alkyl group and R.sub.11 represents a lower alkyl group or a group of the formula: ##STR2## (wherein R.sub.1 -R.sub.5 and R.sub.6 -R.sub.10 are as hereinbefore defined); at least one of R.sub.1 -R.sub.5 and at least one of R.sub.6 -R.sub.10 being lower alkyl grops.] These compounds are capable of forming and precipitating crystalline complexes with alcohols when added to an aqueous solution of alcohol. Thus, these compounds are useful for separating alcohols from aqueous solutions of alcohols.

Abstract: An integrated keyholder/container to facilitate carrying keys together with other important items, such as medication or a wheel lock. The unit includes a cylindrical member with a side wall terminating in an end wall to form a large receptacle. A cap removably covers a large receptacle and has an arm extending outwardly from its side wall. The arm has a bore through which a key ring passes. Another cap removably covers the end wall forming a small receptacle. The cap has a transparent end wall. The small receptacle contains a watch movement whose face is visable through the transparent end wall.

Abstract: A lens barrel has a lens barrel body, a movable lens unit accommodated in the lens barrel body and movable in a direction of an optical axis, a moving operational mechanism for moving the movable lens unit and a handling load change mechanism provided between the lens barrel body and the moving operational mechanism. The handling load change mechanism includes a moving operational member sliding contact portion and a lens barrel sliding contact portion which support handling loads through a fluid lubricant and a change operational member for changing the area of mutual contact by relative motion between the sliding portion.

Abstract: A mount arrangement for a photographic camera which is capable of automatic diaphragm control and automatic focusing includes electrical contacts for transmission of electrical signals between a camera body and an interchangeable lens unit, and mechanical transmission members for the automatic diaphragm control and the automatic focusing and positioning member and recess on and at inner periphery of mount members of the camera body and the lens unit so as not to interfere with each other during the start and the course of the mounting of the lens unit onto the camera body through a bayonet mount device.

Abstract: An improved electric torch or flashlight of the type having an elongated case, a bulb and a battery source of electrical energy is disclosed. The flashlight includes a pressure-receiving surface, which may be in the form of a series of flexible segments formed of case material at an end of the case, a pressure-transmitting surface, which may be in the form of a nib at the end of a right-angle bend formed in the flexible segment, and a complementary surface, which may be a portion of the bulb. Radial pressure on the segments results in a longitudinal displacement of the complementary surface, which controls closing of the electrical circuit and illumination of the bulb.

Abstract: L-tryptophan can be prepared in good yield by a fermentation process which comprises culturing a novel L-tryptophan-producing microorganism of the genus Corynebacterium, which is resistant to at least one member selected from glyphosate [N-phosphonomethyl glycine], paraquat [1,1'-dimethyl-4,4'-bispyridinium] and derivatives thereof, and recovering L-tryptophan from the culture broth.

Abstract: A camera having a lens cover is provided, at its one end portion, with a projecting portion which assists gripping of the camera. The lens cover is laterally slided to cover and uncover a front surface of an objective lens and is provided, on its front surface, with a recess to be engaged with fingers of a hand which grips the camera. The lens cover is operated by the fingers of the hand gripping the camera to move between an uncovering position where the lens cover is positioned adjacent to the projecting portion and a covering position where the lens cover is positioned apart from the projecting portion. The projecting portion in combination with a part of the lens cover located between an edge adjacent to the projecting portion and the recess constitutes a grip portion to be gripped for holding the camera.

Abstract: A vaccine, comprising as antigen, at least a part of the cell of strains of Streptococcus sanguis having a high pathogenic potential and capable of decomposing raffinose and mellibiose, in association with a pharmaceutically acceptable carrier or excipient. Preferably, the antigen is derived from the pili-like structures on the surface layer of the cells. Antibodies produced by immunizing a mammal with said antigen to produce the corresponding antibodies in the body of said mammal and recovering the resultant antibodies from the mammal. A pharmaceutical composition, comprising as active ingredient said antibodies, in association with a pharmaceutically acceptable carrier or excipient. Said vaccine, antibodies and antibody-containing composition may be used for treating human and animal diseases caused or aggravated by said microorganisms such as MCLS.

Abstract: An interchangeable zoom lens assembly in which a part of the zooming lens groups is commonly used for focusing includes a stationary barrel to be mounted on a camera body, a cam ring fitted over or inside the stationary barrel, a manually operable zooming ring and a manually operable focusing ring. The cam ring is rotated relative to the stationary barrel in response to manual operation of the zooming ring and is moved relative to the stationary barrel in the direction of the optical axis of the zoom lens in response to manual operation of the focusing ring. A transmission mechanism moves the zooming lens groups for zooming in response to the rotation of the cam ring and to move the part of the zooming lens groups for focusing while keeping the remaining part of the zooming lens groups at rest in response to the movement of the cam ring in the direction of the optical axis.

Abstract: A geared hub for wheelchairs is specified, which besides at least one forward speed has an active hub brake and one reverse speed, and in which the braking and/or the reverse speed can be realized, from any of the forward speeds, through turning the driver backwards.

Abstract: An electrical socket compatible with NEMA 5-15 and IEC 320 male connectors having conductor prong-accepting recesses, an IEC 320 shield-accepting peripheral recess and a pair of ground prong-accepting recesses, located to accept the ground prongs of both NEMA 5-15 and IEC 320 configurations. The ground prong-accepting recesses are provided with conductive inserts which are joined together to allow electrical continuity to be established with the ground prongs of either configuration.

Abstract: A fixed focus amphibian camera comprises a foremost element of a taking lens group on a water tight camera body. The foremost element has a concave shaped surface on its front side. When the camera is used in water the refractive power of the concave shaped surface is reduced due to the difference in the refractive index between water and air, so that the subject distance that can be focused is shortened in water than in air.

Abstract: A process for producing an antibody having a high specificity to a first antigen and a low cross-reactivity with at least one second antigen, said first antigen comprising a desired antigenic determinant and said second antigen comprising at least one antigenic determinant which is structurally related to said desired antigenic determinant of said first antigen, which process comprises treating a mammal with a copolymer of D-glutamic acid and D-lysine coupled with said second antigen whereby to induce a substantially effective immunological tolerance to said second antigen and then immunizing said mammal with said first antigen. This process results in a higher productivity of a mammal cell capable of producing said desired antibody by culturing said mammal cell, for example, by forming a hybridoma with a suitable tumor cell and implanting the hybridoma into another mammal. The antibody or antiserum of this invention may with advantage be used for immunoassay such as radioimmunoassay.

Abstract: A three phase, permanent magnet rotor, AC electric motor includes a twenty-four unskewed slot stator wound in a three phase arrangement and an eight pole permanent magnet rotor in which the rotor pole pieces are unskewed and angularly displaced from equally 45.degree. spaced reference positions about the rotor by different amounts which are integral multiples of 1.875.degree.. The cogging frequency is eight times higher and the cogging torque are eighth that of a corresponding motor with a conventional permanent magnet rotor.