Abstract: A spindle motor comprises a permanent magnet having an outer diameter, an outer circumference, and a number of poles. A stator core is disposed around and spaced from the outer circumference of the permanent magnet rotor. The stator core has a yoke portion, a number of lengthwise extending and circumferentially spaced slots, and a tooth portion between each adjacent two of the slots. The slots are disposed in close proximity to the outer circumference of the permanent magnet rotor, and a width of each of the slots in a radial direction of the stator core is smaller than a width of the yoke portion and equal to or greater than 1/20 of the outer diameter of the permanent magnet rotor. A coil has two or less turns and is comprised of a conductor disposed in the slots of the stator core.

Abstract: In a lathe of a type employing a movable main spindle, the main spindle (2) is moved in a leftward and rightward direction (Y-axis direction) perpendicular to the longitudinal axis of the main spindle (2) after a workpiece (W) has been machined, and during the movement of the main spindle (2), the machined workpiece (W) is unloaded from the main spindle (2). At a position to which the main spindle (2) has further been moved, another workpiece (W) to be subsequently machined is loaded on the main spindle (2). The unloading of the machined workpiece (W) is carried out by a method in which the machined workpiece (W) is ejected by a workpiece eject means (7) built in a chuck (2a) in the main spindle (2).

Abstract: A compound represented by the formula (1): ##STR1## wherein, m is an integer of 1 to 3;n is an integer 0 or 1;A represents CH or N atom, and forms together with the N atom bonded to the carbonyl group a piperidine ring or a piperazine ring;R.sub.1 independently represents a straight or branched chain alkyl group having 1 to 4 carbon atoms; a cycloalkyl group having 3 to 8 carbon atoms; a phenyl group, unsubstituted or substituted with a halogen atom or with an alkoxy group having 1 to 4 carbon atoms; or a pyridyl group; or two R.sub.1, together with the group >CH-- to which they bind, form a dibenzo cycloheptenyl group or a fluorenyl group;R.sub.

Abstract: A dry analytical element comprising at least one water-permeable reagent layer and a porous spreading layer laminated in this order on a support, wherein at least one layer which is the water-permeable reagent layer, the porous spreading layer or an optional water-permeable layer contains a water-soluble polybasic amino carboxylic acid which is an ampholyte. By applying an analytical element of the invention, an analyte can be measured at a high sensitivity using a small amount of an enzyme, etc., and shelf file can be extended.

Abstract: An immunoassay element for quantitatively analyzing a ligand by determining the change in enzymatic activity. When the ligand is a low molecular weight antigen, competitive reactions between the ligand, enzyme-labelled antibody and conjugate of the antigen and high molecular weight compound are utilized. When the ligand is a macromolecular antigen, a reaction between the ligand and an enzyme-labelled antibody is utilized directly. The immunoassay element comprises a substrate layer containing a non-diffusible substrate which forms a diffusible material in the presence of the enzyme, and a reagent layer for detecting the thus formed diffusible material. The non-diffusible substrate is composed of a pulverized insoluble polysaccharide. The reagent layer may further contain a fragmenting enzyme for further fragmenting the non-diffusible material.

Abstract: An analytical element for whole blood which comprises a blood cell-separating layer having a volume smaller than the upper limit of the diffused volume of a whole blood sample having a hematocrit value of 70% provided on a porous layer, and a method of measuring an analyte which comprises spotting a whole blood sample onto the above analytical element removing the blood cell-separating layer after blood plasma portion of the sample is diffused into the porous layer, supplying a fixed amount of measuring reagent solution having a diffused area smaller than the diffused area of the blood plasma to measure the analyte. According to the invention, the analytical error caused by scattering of hematocrit values is removed, and analysis can be conducted in a high accuracy.

Abstract: An enzyme-labelled antibody adapted for use in a homogeneous immunoassay is provided. The enzyme-labelled antibody is a conjugate of an enzyme with two or more different monoclonal antibodies, each of the monoclonal antibodies being capable of specifically recognizing and binding to a different epitope of the same antigen. By using the enzyme-labelled antibody in the homogeneous enzyme immunoassay process, an analyte can be quantitatively analyzed at a higher sensitivity through a simple operation. Also provided is a dry immunoassay element comprising an immunological reaction layer containing the enzyme-labelled antibody. By the provision of such an immunoassay element, a further simplified quick analysis of an analyte is realized to give an accurate result.

Abstract: An electrophoresis medium membrane comprises a planar support, a planar cover sheet, and a layer of an electrophoresis gel medium provided between the planar support and the planar cover sheet. The electrophoresis gel medium contains an aqueous polyacrylamide gel, which is prepared by cross-linking polymerization of an acrylamide compound and a cross-linking agent in the presence of water and a compound having at least one carbamoyl group as a denaturing agent (or modifier). The layer of the electrophoresis gel medium has both a predetermined gradual change (gradient) in layer thickness and a predetermined gradual change (gradient) in concentrations of the acrylamide compound and the cross-linking agent.

Abstract: A method of quantitatively analyzing an analyte contained in a whole blood sample, wherein a dry multi-layered analysis element is used. The method provides particular merits when the used multi-layered analysis element has no light-shielding layer which is interposed, in the conventional analysis element, between a coloring reagent layer and a blood cell separating layer, so that red coloring matters of blood cells are detected from the support side during the step of measuring the optical density of the reflected light.

Abstract: In a medium for electrophoresis comprising a polyacrylamide gel formed by crosslinking polymerization of an acrylamide compound and a crosslinking agent in the presence of water, and a modifier, the improvement in which the medium contains a water-soluble polymer and agarose.

Abstract: An electrophoretic method comprises the steps of positioning a sample, which contains nucleic acid fragments having different numbers of bases, in an electrophoresis medium composed of an electrophoresis gel medium containing an aqueous poly(meth)acrylamide gel prepared by cross-linking polymerization of a (meth)acrylamide compound and a cross-linking agent in the presence of water and a compound having at least one carbamoyl group as a denaturing agent (or modifier), and applying pulsed electric fields to the electrophoresis medium in two directions, thereby to move the nucleic acid fragments in the presence of molecular sieve effects and to separate the nucleic acid fragments.

Abstract: A medium for electrophoresis comprising a polyacrylamide gel formed by crosslinking polymerization of an acrylamide compound and a crosslinking agent in the presence of water, which is characterized in that the medium contains a water-soluble polymer.

Abstract: A means for electrophoresis suitably employable for analysis of biopolymers such as proteins, as well as for determination of base sequence of DNA, RNA, their fragments, and their derivatives is disclosed. The means comprises a membrane of an aqueous polyacrylamide gel for electrophoresis which is sandwiched between a plane support and a plane covering sheet. The membrane has a thickness gradient in its electrophoresis direction.

Abstract: A medium for electrophoresis comprising an aqueous acrylamide gel formed by crosslinking polymerization of an acrylamide compound and an acrylamide copolymer having at least one specifically selected constitutional repeating unit in the presence of water. The medium may contain a water-soluble polymer and agarose. The medium may contain a modifier such as an anionic surfactant or a compound having at least one carbamoyl group.

Abstract: A medium for electrophoresis in the form of an aqueous gel comprising an acrylamide copolymer having at least one specifically selected constitutional repeating unit. This medium is preferably employable for analysis of bipolymers such as proteins.

Abstract: An element for electrophoresis suitably employable for electrophoresis of biopolymers such as proteins, as well as for the determination of the base sequence of DNA, RNA, their fragments, and their derivatives, which comprises a plastic support, a nonconductive metal oxide layer, and an electrophoresis medium layer comprising an aqueous polyacrylamide gel formed by crosslinking polymerization of an acrylamide compound and a crosslinking agent in the presence of water, which are superposed in this order. The electrophoresis medium layer may contain a water-soluble polymer and agarose. The medium layer may contain a modifier such as an anionic surfactant, formamide or urea.

Abstract: An element for electrophoresis suitably employable for electrophoresis of biopolymers such as proteins, as well as for determination of base sequence of DNA, RNA, their fragments, and their derivatives, which comprises a plastic support, an adhesive layer containing a cellulose derivative, and an electrophoresis medium layer comprising an aqueous polyacrylamide gel formed by crosslinking polymerization of an acrylamide compound and a crosslinking agent in the presence of water, which are superposed in this order. The electrophoresis medium layer may contain a water-soluble polymer and agarose. The medium layer may contain a modifier such as an anionic surfactant, formamide or urea.

Abstract: An element for electrophoresis suitably employable for analysis of biopolymers such as proteins, as well as for determination of base sequence of DNA, RNA, their fragments, and their derivatives, which comprises a plastic material support, an adhesive layer containing an inorganic oxide and a binder, a medium layer for electrophoresis comprising an aqueous polyacrylamide gel formed by crosslinking polymerization of an acrylamide compound and a crosslinking agent in the presence of water, and a plastic material covering film. The electrophoresis medium layer may contain a water-soluble polymer and agarose. The medium layer may contain a modifier such as an anionic surfactant, formamide or urea.

Abstract: An element for electrophoresis suitably employable for analysis of biopolymers such as proteins, as well as for determination of base sequence of DNA, RNA, their fragments, and their derivatives, which comprises a plastic film, a layer for electrophoresis comprising an aqueous polyacrylamide gel, an adhesive layer containing gelatin and optionally a film-forming polymer and/or fine particles, and a plastic film.

Abstract: An element for electrophoresis comprising a polymer sheet having been subjected to glow discharge treatment and an aqueous gel medium layer containing a compound having at least one carbamoyl group (modifier, e.g., urea and formamide) and being provided on the sheet. The aqueous gel medium layer preferably comprises an aqueous polyacrylamide gel formed by crosslinking polymerization of an acrylamide compound and a crosslinking agent in the presence of water.Further, the medium layer preferably contains a water-soluble polymer and agarose.