摘要:
There is disclosed a method for electrical discharge machining of a workpiece in the form of a roll by application of an electrical voltage across said workpiece and an electrode or electrodes mounted opposite to each other with a predetermined gap therebetween, and more particularly such method wherein each such electrode is formed by plural electrode segments separated from one another by insulators, and the electrical discharge operation is performed with said electrode segments in each electrode short-circuited to one another in the rough machining step and with said electrode segments insulated from one another in the finish machining step for reducing the working time.
摘要:
There is disclosed an apparatus for giving a satin finish to the surface of a crowned roll. A plurality of electrode heads are divided and arranged along the axis of rotation of the crowned roll to be worked, and one or a plurality of rectangular electrodes are mounted at a predetermined spacing on each of the electrode heads. The discharge gap of each rectangular electrode is controlled by a servomechanism at a predetermined value and it is also fed traversely a predetermined distance by a traverse feed mechanism. The electrode is rectractably mounted on the electrode head and it is fixed in position so that the discharge surface of the electrode is projected into contact with the roll surface of the crowned roll. The discharge electrode surface of each rectangular electrode is initially flat and this discharge surface is consumed to conform with the shape or contour of the roll surface upon initiation of discharge.
摘要:
The invention provides an animal cell culture kit to be used favorably for culturing animal cells, a method for culturing animal cells, a method for culturing selectively animal cells, and a method for differentiating a cell. An animal cell culture kit according to the invention includes an incubator containing one or more types of functional groups selected from the group consisting of hydrophilic functional groups and hydrophobic functional groups at predetermined contents on a surface, and a serum-free culture medium. Since the animal cell culture kit includes an incubator having a functional group suitable for adhesion and proliferation of specific animal cells, proliferation of animal cells can be promoted even with a serum-free culture medium.
摘要:
The invention provides an animal cell culture kit to be used favorably for culturing animal cells, a method for culturing animal cells, a method for culturing selectively animal cells, and a method for differentiating a cell. An animal cell culture kit according to the invention includes an incubator containing one or more types of functional groups selected from the group consisting of hydrophilic functional groups and hydrophobic functional groups at predetermined contents on a surface, and a serum-free culture medium. Since the animal cell culture kit includes an incubator having a functional group suitable for adhesion and proliferation of specific animal cells, proliferation of animal cells can be promoted even with a serum-free culture medium.
摘要:
To provide a flame retardant injection molded article that not only has flame-retardant properties but also combines impact resistance and heat resistance, either a flame retardant injection molded article is formed from a resin composition comprising a lactic acid resin (A), a metal hydroxide (B) whose surface has been treated with a silane coupling agent, and a copolymer (C) of lactic acid resin and diol/dicarboxylic acid, respectively at prescribed proportions, or a flame retardant injection molded article is formed from a resin composition comprising, in addition to the component (A) and component (B), either or both of an aliphatic polyester other than lactic acid resin and an aromatic aliphatic polyester (D), and an ester compound (E) of molecular weight in the range of 200 to 2,000, respectively at prescribed proportions.
摘要:
Human- and mouse-derived bHLH type transcription factors were isolated. These transcription factors shared homology with the transcription factor DEC1, the expression of which is induced in human cartilage cells when differentiated with cAMP. Thus, these isolated transcription factors are thought to be novel transcription factors belonging to the DEC1 subfamily. The transcription factors of the present invention are also homologous to mouse Stra13 and rat SHARP that are related to neurocyte differentiation. The transcription factors of the present invention may be used as tools for developing pharmaceutical agents for diseases related to the differentiation and proliferation of cells.
摘要:
A magnetic storage apparatus includes a substantially non-flexible magnetic recording medium, a magnetic head slider having a reading/writing element mounted therein and liquid lubricant provided on the surface of the magnetic recording medium. The liquid lubricant is a liquid in a Newtonian range having a viscosity which is substantially constant irrespective of a shear rate or a liquid having the property that the actual viscosity is increased with increase of the shear rate. The magnetic head slider maintains a gap between the slider and the magnetic recording medium to perform reading and writing while being moved on the liquid lubricant intermittently or continuously in a contact manner with the liquid lubricant. There is provided a device for maintaining a constant flying height even if a movement speed is varied, which flying height is represented by the size of the gap. Thus, the magnetic storage apparatus of the liquid bearing system or the contact system has only very small forces such as liquid drag force and friction force or sticking force and is capable of performing stable slider movement, performing high-speed seeking operation with high reliability and performing high-density recording.
摘要:
A thin-film magnetic recording medium improves the magnetostatic and dynamic magnetic characteristics of the conventional magnetic recording media. In one embodiment, the substrate surface is textured in both the circumferential and radial directions. In further embodiments, a variety of underlayers (13) and crystal orientation control layers (17) are provided in accordance with specific parameters to control the crystal structure of the magnetic layer (14). Finally, an embodiment includes multiple magnetic layers (14, 19) having respectively different residual magnetic flux densities and thicknesses, but similar dot products of residual magnetic flux density and thickness.
摘要:
A power transmission device for a tractor in which a main shifting device and a secondary shifting device are disposed in front and back of one another within a transmission case which is mounted on a rear part of the tractor body is disclosed. Drive power, which is transmitted from an engine, is changed in speed by the main shifting device and secondary shifting device and then transmitted to an axle through a differential shaft. The differential shaft is disposed between the main shifting device and secondary shifting device. A lower link for connecting a piece of agricultural machinery is pivotably connected to the transmission case on the side of the secondary shifting device and behind the differential shaft. Various shafts within the transmission case are arranged on two different vertical level above and below the differential shaft, which extends at right angles with respect to these shafts. The differential shaft is connected to the axle through a reduction gear apparatus which has a counter-shaft. Furthermore, a brake device for braking the differential shaft is provided.