Sony Corporation

Kazumine Ito

Naohisa Sakamoto

Tomohiko Nakamura

Tasuku Yotoriyama

Noriyuki Kishii

Seiji Kobayashi

Mari Ichimura

Toshihiro Horigome

Takuya Kishimoto

Michihiro Ohnishi

Kenzo Machida

Osamu Kawakubo

Takashi Naito

Yasuaki Nakane

Tomoteru Abe

Hiroshi Kawase

Yutaka Kasami

Sanae Abe

Manami Nakamura

[Object] To provide a method of purifying nucleic acids where the operation is simple and the nucleic acids can be extracted in a short time with high efficiency. [Solving Means] A method of purifying nucleic acids including the step of adsorbing substances in a sample containing nucleic acids with an ion exchange resinincluding a positive ion exchange resin and a negative ion exchange resin. As the positive ion exchange resin, a first positive ion exchange resin and a second positive ion exchange resin having an exclusion limit molecular weight lower than that of the first positive ion exchange resin may be used.

Method of purifying nucleic acids and kit for purifying nucleic acids

There is provided a method for preparing a sample for a nucleic acid amplification reaction, the method including a heating step of applying heat to a nucleic acid-containing sample, and an electrodialysis step of bringing an electrical conductivity of the sample to 2,000 &#x3bc;S/cm or less.

Method for preparing sample for nucleic acid amplification reaction and preparation device of sample for nucleic acid amplification reaction

The present disclosure provides a nucleic-acid extraction method for carrying out the following procedures in the same cell, the procedures including: performing an ultrasonic process on a sample containing a nucleic acid; adsorbing substances contained in the sample by making use of an adsorption carrier; and condensing the nucleic acid by damming the nucleic acid moving in an electrophoresis phenomenon. In accordance with the nucleic-acid extraction method, it is possible to carry out an ultrasonic process, an adsorption process and an electrophoresis process in the same cell. Thus, it is possible to eliminate an operation to transfer the sample from one cell to another one for each of the processes.

Nucleic-acid extraction method and nucleic-acid extraction cartridge

Method of purifying nucleic acids, method of extracting nucleic acids and kit for purifying nucleic acids

Provided is a microbead analysis method for a microbead. The microbead is formed in a columnar shape having a top surface and a bottom surface facing each other, as placed almost in parallel, and a side surface extending therefrom, and carries an identification pattern formed on at least one of the top surface and the bottom surface and a substance immobilized on a surface thereof having affinity to an analyte substance. The method includes detecting fluorescence emitted from the microbead surface due to interaction of the analyte substance with the substance having affinity to the analyte substance from a region including a region of the top surface and the bottom surface where there is no identification pattern formed and the side surface.

Microbead analysis method and microbead analyzer

Disclosed herein is a cell for testing microbeads, used for testing microbeads each formed in a cylindrical shape having an upper surface and a lower surface opposite to and substantially parallel to each other and a side surface continuous with the upper and lower surfaces, at least one of the upper surface and the lower surface being provided with an identification pattern, the cell including: a support substrate; and a cover disposed opposite to the support substrate, wherein a space between the support substrate and the cover forms a containing space in which to dispose the microbeads, and the distance between the support substrate and the cover is greater than the thickness of the microbeads and smaller than twice the thickness of the microbeads.

Cell for testing microbeads and method of analyzing microbeads

An optical disk apparatus for recording information of copyright on an optical disk where desired data are recorded by repetition of pits or marks. The apparatus comprises a recording means for recording the copyright information by irradiating a laser beam onto the optical disk in such a manner as to repeatedly form, in a predetermined area of the optical disk, local regions which cause greater changes in the return-light receiving result as compared with the pits or marks. On the optical disk, the existence ratio of the local regions for recording the copyright information is set to be less than 0.3 in the circumferential direction of the disk. In a reproduction mode, the copyright information recorded like a bar code for example can be exactly reproduced with certainty.

Optical disk apparatus, optical disk recording method, and optical disk

Disclosed are an apparatus for initializing an optical recording medium to be initialized with stability and ease without employing any focus servo means, and a phase-changing optical recording medium initialized by the initializing apparatus to have a recording layer in a uniform crystalline state over an entire area of the medium which takes part in recording and reproduction of an information signal. In the apparatus for initializing a phase-changing optical recording medium, a laser beam emitted from a laser beam source is irradiated to a recording layer, in an amorphous state, formed in an optical recording medium to be initialized, which is a pre-stage member of the phase-changing optical recording medium, for changing the recording layer into a crystalline state. The laser beam source, e.g., a YAG laser, includes a high-speed shutter for exciting the laser beam source while the laser beam source is held in a state of not starting oscillation, and emits the laser beam within a very short time on the order of several tens nanoseconds (ns) to several hundreds nanoseconds (ns) with its peak power increased more than 10000 times that produced in a continuous oscillation mode.

Initializing a phase-changing optical recording medium using a laser including a high speed shutter

A method of initializing a phase-change optical disk which is capable of preventing enlargement of an amount of jitter which takes place when the number of overwriting operations does not exceed several times. The surface of the phase-change optical disk, on which information signals will be recorded, is crystallized. Then, signals are recorded with marks and spaces in grooves along tracks of the phase-change optical disk so that initialization is performed. The initialization is performed in such a manner that the length of each of spaces is shorter than a shortest length of spaces of information signals.

Method of initializing phase-change optical disk to prevent jitter increase due to low level overwriting

An optical recording disc in which a disc substrate made of a synthetic resin having a light transmittance and a hub made of a synthetic resin, fixed to a center part of the disc substrate by means of a predetermined technique such as a supersonic wave expansion molding and on which a circular magnetic metal plate is installed by means of an insert molding and so on are provided and a circular groove which is continuous at an outer peripheral side of a fixing part between the disc substrate and hub is furthermore installed on at least either of the disc substrate or hub. The groove is provided for absorbing a stress generated due to a difference in thermal expansion rates between the disc substrate made of the snythetic resin and magnetic metal plate.

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Tokyo, Japan

Kazumine Ito