Abstract: A (1R,2S)-2-hydroxycycloalkanecarboxylic acid ester is efficiently and selectively produced by microbial asymmetric reduction of a 2-oxocycloalkanecarboxylic acid ester with a bacterial strain or its processed material.

Abstract: A developing apparatus of the type including a developing roller disposed in a development box, a stirring roller parallel spaced apart from the developing roller, and a toner replenisher pipe disposed in the stirring roller, wherein the stirring roller has a substantially hollow cylindrical shape and includes a plurality of axial ribs extending parallel to a longitudinal axis of the stirring roller and disposed equidistantly from the longitudinal axis, and a plurality of helical blades integral with the axial ribs and skewed relative to the longitudinal axis of the stirring roller, said hollow cylindrical stirring roller being composed of at least two identical segments which are divided by a plane extending through said longitudinal axis of said stirring roller. The stirring roller is simple in construction and can be manufactured at a low cost.

Abstract: A disc apparatus includes a drive mechanism rotatively driving a disc recording medium and having a motor and a chucking mechanism provided on a shaft of the motor, a head reading out information from the disc recording medium, a disc loading detector for outputting a loading detection signal when the disc recording medium has been loaded into the disc apparatus, a chucking control circuit outputting a motor rotation control signal for driving the motor during a chucking operation by the chucking mechanism, a motor drive control circuit driving the motor when at least one of a motor rotation control signal from the chucking control circuit and from an external information processing apparatus controlling the disc apparatus are supplied, an information output circuit supplying information obtained from the head to the external information processing apparatus during the motor is rotated on basis of the motor rotation signal, and an output prohibit circuit prohibiting the supply of information from the informat

Abstract: A process for producing a catalyst component for olefin polymerization is provided, which process comprises spraying a solution of a magnesium compound e.g. MgCl.sub.2 and an alcohol such as MgCl.sub.2. nROH (wherein R is 1-10 C alkyl and n is 3-6) into a cooled spray column to obtain a spherical solid component (carrier) without any substantial vaporization of the alcohol, followed by partly drying the component for a time till a specified ratio of the alcohol/MgCl.sub.2 is attained, and then subjecting the resulting component to treatment with a titanium halide and an electron-donating component, the resulting component having a large particle diameter, without any dispersion of the solvent content in the component particles and also without any breakage of the particles when subjected to treatment with the titanium halides.

Abstract: A fluid-filled cushioning device having a cylindrical elastic body mounted on an inner sleeve and having an orifice structure with an orifice formed therethrough is disclosed. A pair of annular elastic members each having a retainer member and an outer sleeve are mounted on the inner sleeve such that the retainer member is press-fitted in the axial end portion of the inner sleeve while the orifice structure is sandwiched between the axial end faces of the outer sleeves, in the axial direction. A bracket is mounted on the outer sleeves of the elastic members and is fixed to a support member, so that the bracket forces the outer sleeves against the orifice structure. The inner sleeve, elastic body and elastic members define two fluid-filled chambers which are separated from each other by the elastic body and which communicate with each other through the orifice.

Abstract: A process for preparing a low-molecular weight chitosan which comprises adding chitosan to water containing a monobasic acid to prepare an intimate chitosan-water mixture and treating said mixture with cellulase.

Abstract: A novel transition-metal compound having a bis-substituted cyclopentadienyl ligand of bridged structure (I) and a novel mixture of the compound (I) with an aluminoxane (B), each useful as catalyst component(s) for stereoregular olefin polymerization are provided, which compound (I) is expressed by the formula ##STR1## wherein M is Zr or Hf; Y is Si or Ge; R.sup.1.sub.n -C.sub.5 H.sub.4-n and R.sup.1.sub.q -C.sub.5 H.sub.4-q each represent an unsubstituted or substituted cyclopentadienyl group; n and q each represent an integer of 0 to 4, but cases of n=q=0 and n=q=4 are excluded; R.sup.1 s may be same or different and each represent H, silyl or hydrocarbon radical; R.sup.2 s may be same or different and represent H or hydrocarbon radical; and Xs may be same or different and represent H, halogen or hydrocarbon radical; and which aluminoxane is expressed by the formula (II) or the formula (III) ##STR2## wherein m represents an integer of 4 to 30 and R.sup.3 represents a hydrocarbon radical.

Abstract: A simple coffee bean roasting device as disclosed which can be used as a container to store coffee beans in an airtight condition and is also capable of roasting the coffee beans easily and quickly by use of a home-use gas heater. The coffee bean roasting device is simple in structure and it is composed of a container of aluminum foil, a cover of a transparent cellophane, and a handle.

Abstract: A method of manufacturing a motorcycle radiator comprising the steps of:(1) arranging between a pair of horizontally arranged water tanks or headers, a straight radiator core comprising in combination: a plurality of corrugated sheets spaced alternately with a plurality of flattened tubes; the flattened tubes; and elongated reinforcing plates, each of said reinforcing plates being provided with a plurality of slits extending from opposite edge portions in width directions of the reinforcing plates, the slits on one of the opposite longitudinal edge portions being disposed in a row and at a predetermined pitch, and the slits on the other of the opposite longitudinal edge portions being disposed in another row and at the predetermined pitch at respective positions halfway between positions of adjacent ones of the slits on the one of the edge portions with respect to a direction parallel to the longitudinal axis;(11) assembling and brazing these main components to produce a straight radiator which establishes th

Abstract: Bis(di-, tri- or tetra-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula [I] are provided, ##STR1## (wherein R.sup.1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R.sub.2.sup.1 --C.sub.5 H.sub.3 stands for a di-substituted cyclopentadienyl radical; and X is a halogen atom).This compound, when combined with an aluminoxane repesented by the following general formula [VII], gives a high-activity catalyst for the synthesis of polyolefins, ##STR2## (wherein m is an integer of 4 to 20; and R.sup.2 denotes a hydrocarbyl radical).

Abstract: A fluid-filled elastic cushioning device for elastically connecting a first and a second member, including an inner sleeve attached to the first member, an elastic body fitted on the inner sleeve and having two pockets which are open in opposite axial end faces of the elastic body, two closure members for closing the open ends of the pockets to thereby form two fluid chambers, an orifice member embedded in the elastic body and having an orifice communicating with the fluid chambers, and a mounting plate secured to the orifice member. At least one of opposite ends of the orifice is open at a bottom of the corresponding at least one of the pockets, and at least one stopper rubber block is secured to each of at least one of the closure members which closes the corresponding at least one of the pockets. Each rubber block extends into the corresponding one of the fluid chambers such that a free end of each rubber block is normally spaced apart from the corresponding open end of the orifice.

Abstract: A single-polarization single-mode optical fiber comprises a core made of silica glass, a clad surrounding the core and made of silica glass having a smaller index of refraction than the glass comprising the core, a pair of stress applying members symmetrically disposed on the clad and made of silica glass having different thermal expansion coefficient from that of the clad, spacers interposed between the stress applying members and made of silica glass having substantially the same thermal expansion coefficient as the clad, and a jacket surrounding the spacers, stress applying members. The jacket is also made of silica glass and has a smaller expansion coefficient than the stress applying members. The optical fiber of this invention has an excellent polarization preserving characteristic, low loss, long length, and stable characteristics.

Abstract: By inclusion of a fluorinated graphite material in conjunction with carbon black in the magnetic layer of a magnetic recording medium, the medium is improved significantly in its surface properties and electromagnetic performance properties as well as magnetic characteristics.

Abstract: A method of forming a coating on a polyolefin substrate comprising the steps of applying a primer coating onto the substrate and then applying a finish coating is disclosed. The method is characterized in that the primer coating consists essentially of a polyurethane prepolymer derived from a polypropylene glycol having a molecular weight from about 400 to about 2,000 and an excess of diphenylmethane diisocyanate.

Abstract: By inclusion of a fluorinated graphite material in conjunction with a silicone oil in the magnetic layer of a magnetic recording medium, the medium is improved significantly in its smooth-running properties and electromagnetic performance properties.

Abstract: A solid catalyst component for olefin polymerization having a high polymerization activity and affording a highly stereoregular polymer having a good particulate form, and a process for producing the same are provided, which component indispensably contains Mg, Ti, Al, halogen and alkoxy group; has two absorption peaks (absorbances A.sub.1 and A.sub.2) at specified wavenumbers within a specified region of spectra according to infrared spectrophotometry, A.sub.1 /A.sub.2 and A.sub.1 /A.sub.3 (A.sub.