摘要:
In a first reflected light amount comparing step and a first reflected light storing step, disc search is performed while moving a laser spot position from below to above an optical disc D, and a first reflected light amount which first becomes larger than or equal to a predetermined reflected light amount threshold is stored. Thereafter, in a second reflected light amount comparing step and a second reflected light storing step, disc search is performed while moving the laser spot position from above to below the optical disc D, and a second reflected light amount which first becomes larger than or equal to the predetermined reflected light amount threshold is stored. Thereafter, in a reflected light amount comparing step, the first and second reflected amounts are compared with each other. In a type determining step, it is determined whether or not the optical disc D is an SACD Hybrid, using the result of the comparison. Therefore, disc search can be performed while an optical disc is being rotated, and the type of the disc can be determined, without depending on a variation in performance of a circuit in a pickup.
摘要:
To provide a block copolymer composition excellent in balance of transparency, impact resistance, etc. in the form of not only an excluded product and a blow molded product but also an injection molded product. A linear block copolymer composition having at least three types of polymer blocks with different molecular weights each comprising a vinyl aromatic hydrocarbon as monomer units, wherein the molecular weight distribution of a mixture of the polymer blocks is within a specific range, and in GPC of the mixture, M1/M2 is within a specific range, where M1 is the peak top molecular weight corresponding to a peak at which the peak top molecular weight becomes maximum among peaks forming a proportion of the area of at least 30% to the whole peak area, and M2 is the peak top molecular weight corresponding to a peak at which the peak top molecular weight becomes minimum among peaks at which the peak top molecular weight is at most 50,000 and which form a proportion of the area of at least 20% to the whole peak area.
摘要:
A field yoke (2) on which permanent magnets are mounted is fixed to a stationary member (1) of a machine. An armature (3) composed of coils is attached to a surface of a table (4), which is guided to move by a rectilinear movement guide (5), opposed to the field yoke (2). The field yoke (2) and the armature (3) constitute a linear motor. A compressed air feeding means (b) is mounted to the table (4). Compressed air jetting ports (6c) of the compressed air feeding means (6) are disposed ahead of and behind the table (4). While moving the table (4), compressed air is jetted to a movement surface, on which the table (4) moves, in order to remove foreign matter. Thus, as the movement surface on which the moving member (table (4)) of the linear motor moves is cleaned to remove the foreign matter, the movement of the table (4) is smooth. Moreover, the linear motor will not be damaged. This results in the linear motor capable of cleaning the movement surface on which the movable member of the linear motor moves.
摘要:
An ethylene-aromatic vinyl compound copolymer characterized by satisfying the following conditions: (1) the aromatic vinyl compound content is from 0.5 mol % to 10 mol %; (2) as measured with respect to a molded product having a thickness of 0.2 mm, the haze is at most 14%, or the total light transmittance is at least 90%; (3) an ethylene-aromatic vinyl compound copolymer characterized in that the relation of the aromatic vinyl compound content and the glass transition point (Tg) obtained by an inflection point method as observed at a temperature of at least −50° C. by a differential scanning calorimeter (DSC), satisfies the following formula (1): −20+1.00St>Tg>−30+1.05St Formula (1) wherein St represents the aromatic vinyl compound content (molar fraction %) in the copolymer; and (4) the weight average molecular weight is from 140,000 to 500,000 when the aromatic vinyl compound content is from 5 mol % to 10 mol %, or from 60,000 to 500,000 when the content is from 0.5 mol % to less than 5 mol %.
摘要:
To provide a block copolymer composition having a good balance in transparency and impact resistance, and particularly having an excellent impact resistance, by making a molded product of injection molding under high sear condition in such a manner as to hardly generate anisotropy. A block copolymer composed of a hard segment block comprising a block made mainly of a vinyl aromatic hydrocarbon and a soft segment block comprising a block made mainly of a conjugated diene, characterized by having a remarkably improved impact resistance without degrading transparency in respect of not only an extrusion-molded product and a blow-molded product but also an injection-molded product, by blending two kinds of block copolymers having a hard segment block of a specific structure.
摘要:
A process for producing oxiracetam (4-hydroxy-2-oxo-1-pyrrolidineacetamide) useful as an agent for improving brain metabolism, under mild conditions and in a single process is provided, this process comprises reacting glycinamide with a butyric acid ester expressed by the formula ##STR1## wherein A represents a halogen atom or an epoxy group, B represents hydroxyl group, but when A is an epoxy group, A and B together form an epoxy group, and R represents an alkyl group.
摘要:
Novel antibiotics of the following structure ##STR1## wherein R represents a moiety selected from the group consisting of hydrogen, --COCH.sub.2 NH.sub.2, --COCH.sub.2 NHCONH.sub.2 and --COCH.sub.2 NHCHO;process for preparation thereof; and biologically pure culture for use therein.
摘要:
The blade part assembling structure for electric shaver of this invention comprises fitting pins which are rotatably fitted to a blade mounting base, a movable blade mounted on the base in the first rotating positions of the fitting pins, and a stationary blade mounted on the base in the second rotating positions so that, in the case of dismounting the stationary blade, the movable blade will be locked with the fitting pins in the rotated positions of the fitting pins and any occurence of troubles during disassembling and re-assembling of the blade part by the user can be avoided.
摘要:
Novel antibiotics of the following structure ##STR1## wherein R represents a moiety selected from the group consisting of hydrogen, --COCH.sub.2 NH.sub.2, --COCH.sub.2 NHCONH.sub.2 and --COCH.sub.2 NHCHO; process for preparation thereof; and biologically pure culture for use therein.
摘要:
Novel .beta.-D-ribofuranosyl (1 .fwdarw. 5), O-[.alpha.-D-2-amino(or 2-acylamino)-2, 3-dideoxy-glucopyranosyl (1 .fwdarw. 4) ] 1, 3-diamino (or 1, 3-diacylamino)-1, 2, 3-trideoxy-myoinositols and their acid salts. These compounds are useful either as antibiotics or as intermediates for their synthesis. The compound can be produced by treating an O-.alpha.-L-2, 6-diacylamino-2, 6-dideoxyidopyranosyl (1 .fwdarw. 3), .beta.-D-ribofuranosyl (1 .fwdarw. 5), O-[.alpha.-D-2-acylamino-2, 3-dideoxy-glucopyranosyl (1 .fwdarw. 4)] 1, 3-diacylamino-1, 2, 3-trideoxy-myoinositol with periodic acid or its salts, reacting the resulting compound with an amine, and optionally deacylating the product.