Nec Corporation

Hitachi Electronics Engineering Co., Ltd.

Ryoji Nemoto

Hisashi Hagiwara

Hidemi Yoshida

An apparatus for automated preparation of DNA samples which comprises a reactor for preparing DNA samples and adjacent thereto an enzyme supply section, a plate holding section, a nozzle sealing section and a cleaning tank section, and wherein plates are loaded onto or unloaded from said plate holding section by means of a transport robot. The reactor for preparing DNA samples comprises a plurality of hollow electroconductive nozzles, hollow syringes coupled to said nozzles and pistons inserted into said syringes, the top of each of said pistons having a piston head secured thereto such that it can move up and down independently of said reactor for preparing DNA samples, the intermediate portions of said electroconductive nozzles being encased in a housing having an opening on both sides, a cooling mechanism being provided adjacent one of said openings, and electroconductive boards being connected to the intermediate portions of the electroconductive nozzles within said housing and also connected to a power supply via conductors.

Apparatus for automated preparation of DNA samples and reactor for preparing DNA samples

In a hierarchical multiprocessor system in which a plurality of clusters, each of which is a multiprocessor wherein a plurality of processors share a memory, each of data collecting units of master processors - and - in clusters and , respectively, collects at regular. time intervals data to be transferred from its own cluster to the other cluster; transferable data generating units generates combined transferable data by putting together the remaining data after the removal of duplicates from the collected data; transferable data transfer units transfers the generated combined transferable data to the master processor in the destination cluster; transferable data receiving units receives combined transferable data transferred from the master processor in another cluster; and transferable data distributing units distributes the received combined transferable data to processors in its own cluster.

Inter-cluster data transfer system and data transfer method

The improved fluorescence detector comprises a tubular electrophoretic device through which a sample labelled with four kinds of fluorescent dye is caused to migrate, illumination optics for illuminating the tubular electrophoretic device with exciting light and detection optics for detecting the fluorescence emitted from the sample illuminated with the exciting light and it is characterized in that a plurality of tubular electrophoretic devices (1) are arranged in a row, a plurality of graded-index lenses (9) are arranged parallel to and in the same number as said plurality of tubular electrophoretic devices (1), each lens array being composed of four vertically stacked graded-index lenses, a plurality of bandpass filter arrays (11) are also arranged parallel to and in the same number as said plurality of electrophoretic devices (1), each filter array being composed of four filters arranged vertically in a row, and a light-receiving element of a planar type (13) is provided at the back of the rows of said bandpass filters (11). The apparatus is an efficient and compact multi-color fluorescence detector capable of real-time detection.

Fluorescence detector

An initial value for each processor of a multiprocessor system is set using a specified calculating expression. The system determines a random number calculating expression using a multiplicative congruence method so that random numbers generated from these initial values may make a sequence of random numbers in series, and generates random numbers using the calculating expression. The system permits the adding of a processor in the middle of generation of random numbers by making equal to one another the number of random numbers generated by the existing processors, setting an initial value in each processor on the basis of the total number of already generated random numbers, and generating random numbers according to a sequence of random numbers prior to adding the processor until reaching a specified total number of random numbers to be generated.

Growing community of inventors

Tokyo, Japan

Ryoji Nemoto