摘要:
Controlled release pharmaceutical beads are provided having a multi-layered core and a multi-layered periphery. The core contains at least (A) an inner portion having a suitable organic acid and (B) a sustainably-acid-releasing coating thereover. The periphery contains at least (A) an inner portion having a mixture of at least (i) a pharmaceutical compound and (ii) a surface-active agent, and (B) a sustainably-drug-releasing exterior coating.
摘要:
Disclosed is a controlled release pharmaceutical preparation, comprising a core containing a pharmaceutically active ingredient, and a porous film of a hydrophobic polymeric substance or a hydrophobic polymeric substance and a hydrophilic polymeric substance, the core being coated with the porous film. Disclosed is also a method for producing the same. The controlled release pharmaceutical preparation of this invention posseses a desired dissolution rate by controlling the porosity of the porous film.
摘要:
A controlled release pharmaceutical preparation comprising (a) a core containing a pharmaceutically active substance and an organic acid, and (b) a coating film formed on the surface of the core by aqueous coating of a water-insoluble and water-slightly permeable acrylic polymer containing a trimethylammonium-ethyl group, which exhibits well controlled dissolution and release of the pharmaceutically active substance when administered and can maintain the desired blood level of the active substance for a long period of time, and a method for producing the preparation.
摘要:
Disclosed is a controlled release pharmaceutical preparation, comprising a core containing a pharmaceutically active ingredient, and a porous film of a hydrophobic polymeric substance or a hydrophobic polymeric substance and a hydrophilic polymeric substance, the core being coated with the porous film. Disclosed is also a method for producing the same. The controlled release pharmaceutical preparation of this invention posseses a desired dissolution rate by controlling the porosity of the porous film.
摘要:
During recording of data on a recording medium, tracking is performed using auxiliary beams to refer to guide tracks as done in the conventional three-beam method. During reproduction of data from the recording medium, tracking is performed using a main beam to refer to a data pit recorded in a recording track in accordance with the push-pull method. In addition, there are provided two tracking control circuits based on the three-beam method and push-pull method, and the use of tracking control signals based on the three-beam and push-pull methods that are output from the two circuits is selected via a switch.
摘要:
In a tracking or focusing servo control loop, there are provided a switch element for switch-controlling a tracking or focusing error signal, and a smoothing circuit for switching passage the error signal. An amount of detected reflection from an optical recording medium is monitored by a controller section, and the switching action of the switch element is ON/OFF-controlled by the controller section so as to maintain a servo loop gain at a predetermined standard. Thus, it is possible to maintain a constant servo loop gain without being influenced by variation in the laser light amount or difference in reflectivity characteristics of the recording layers of individual optical recording media, and constantly stable tracking servo control and/or focusing servo control can be performed.
摘要:
To provide a driving device for an objective lens that has a high driving sensitivity and superior driving frequency characteristics.The present invention relates to a device for driving the objective lens (1) of an optical head that uses a device for recording information on an optical information recording medium, and for reproducing information therefrom, by irradiating a beam of light thereon while positioning and focusing the light with respect to an information track on the optical information recording medium. The device has a loose linkage member which supports an objective lens within a cylindrical member and comprises the cylindrical member (14 ) and a cylindrical hole portion (19 ) into which the cylindrical member is inserted so as to face the cylindrical hole with an air gap therebetween and with the axes thereof oriented vertically, and the driving force generated by a tracking coil (3 ) is transmitted through this loose linkage member to the objective lens.
摘要:
An apparatus for optically recording and reproducing information in and from an optical information recording medium having a guide track. The apparatus uses an optical head having a diffraction grating, for recording and reproducing information. In recording information, a zero-order diffraction light beam from the diffraction grating is used for the information recording, and plus/minus first-order diffraction light beams from the diffraction grating are used for the tracking. In reproducing information, the zero-order diffraction light beam is used for the tracking, and higher- and odd-order diffraction light beams including at least plus/minus first-order diffraction light beams are used for information reproduction.
摘要:
An apparatus, for butt-welding steel strips using a laser beam are disclosed, in which opposite ends of preceding and succeeding steel strips fed continuously are cut and the cut end edges thus formed are welded by butt welding using a laser. The cutting and butting at the time of welding are effected with one edge of the preceeding steel strips adjacent to the opposite ends of the succeeding steel strips aligned to be parallel with the center line of travel of the continuous processing line. When effecting the alignment, the preceding or succeeding steel strip is attracted by an electromagnetic chuck on a work table in the continuous processing line and is pulled by the chuck toward a reference block provided with an alignment edge parallel to the center line of travel of the processing line to bring the edge of the sheet into contact with the reference block. The alignment is done in this state. The work table is capable of being moved along the continuous processing line. A revolving table supports the work table.
摘要:
An original conveying apparatus is provided for use in a copying machine having a moving original receptacle which permits a copying from either a sheet original or a thick material. A thick material receptacle is integrally formed with a sheet original drive. A sheet original is conveyed by the sheet original drive while the receptacle is maintained at its home position. A thick material is conveyed by a reciprocatory movement of the receptacle from its home position, without previously changing its position. The sheet original drive can be smoothly engaged with or disengaged from a transmission system.