Abstract: The centrifuge of the present invention is a centrifuge wherein a rotor is engaged integrally with a drive shaft, in the direction of turning, so that it can be freely attached and detached, wherein the drive shaft is attached to the equipment frame through elastic members, a spherical surface is formed in the upper part of the drive shaft, a spherical concave surface corresponding to the spherical surface in the drive shaft is formed in the top surface of a bearing hole in the rotor, the spherical concave surface of the bearing hole is made to ride on the spherical surface of the drive shaft, and the rotor is engaged so that it can swing freely relative to the drive shaft.

Abstract: In a centrifugal separating method using connected tube assemblies in which a plurality of tubes are connected to each other, the connected tube assemblies that have been used in a previous process are mounted in a centrifugal machine as they have been to perform centrifugal separation, and are used as they are in a subsequent process. In a centrifugal machine, the rotor is formed with a plurality of holes arranged in straight line, each of the holes receiving and supporting one of a plurality of tubes of the connected tube assembly Alternatively, the rotor is formed with a straight or arc-shaped long hole for receiving and supporting two or more tubes of a plurality of tubes of the connected tube assembly.

Abstract: A method for the extraction and purification of a plasmid DNA which comprises (1) collecting a culture medium containing a transformant into a first cartridge for the extraction and purification of the DNA, (2) subjecting said transformant to bacteriolysis and RNA degradation conditions, (3) recovering an extract containing solubilized DNA from said first cartridge, (4) transferring said recovered extract to a second cartridge for the extraction and purification of the DNA, and (5) absorbing, washing and eluting purified plasmid DNA from said second cartridge; and a device for the extraction and purification of a DNA which comprises a first cartridge for the extraction and purification of the DNA having at least a trap filter and a membrane filter, and a second cartridge for the extraction and purification of the DNA having at least a glass fiber filter, a glass powder layer and a membrane filter.

Abstract: An object of the present invention is to carry out the extraction and purification of DNA in a short period of time. This object is accomplished by DNA extraction and purification apparatus illustrated in the drawing. This apparatus includes a pipetting unit which can be horizontally moved along a rail by means of a transfer device. This apparatus also includes tube racks which can be moved horizontally and vertically. In these tube racks are disposed filter tubes (not shown) for the extraction and purification of DNA. Moreover, a waste liquid vat and a recovery vat are disposed below these tube racks. The waste liquid vat and the recovery vat are each provided with a suction port (not shown) to be connected to a vacuum pump.

Abstract: An object of the present invention is to carry out the extraction and purification of DNA in a short period of time. This object is accomplished by DNA extraction and purification apparatus illustrated in the drawing. This apparatus includes a pipetting unit which can be horizontally moved along a rail by means of a transfer device. This apparatus also includes tube racks which can be moved horizontally and vertically. In these tube racks are disposed filter tubes (not shown) for the extraction and purification of DNA. Moreover, a waste liquid vat and a recovery vat are disposed below these tube racks. The waste liquid vat and the recovery vat are each provided with a suction port (not shown) to be connected to a vacuum pump.

Abstract: The present invention is to provide an improved container rotor for use in a centrifugal separator which can serve different types of the centrifugal separating operation by the employment of a specific rotor which allows three types of bucket to be exchanged readily with one out of the swing type, the angled aperture type and the horizontal aperture type accordingly to the kind of specimen to be separated, which comprises, in combination, a rotor body and a plurality of buckets, wherein the rotor body includes receiving recesses and an opposed pair of supports for receiving operatively the plurality of buckets, the buckets being adapted to afford three different types of centrifugal separating operations, i.e., the swing type, the angled aperture type and the horizontal aperture type.