Hitachi-high-technologies Corporation

Hitachi, Ltd.

Hiroaki Ishizawa

Takashi Inoue

Hiroshi Watanabe

Shinichi Taniguchi

Hiroyuki Mishima

Terumi Tamura

Masashi Endo

Keiko Nogawa

Michiaki Sekiguchi

Isao Yamazaki

Sakuichiro Adachi

Hiroyasu Uchida

Akihiro Nojima

Kohshi Maeda

Keiko Yoshikawa

Hideki Asai

Tetsuaki Abe

Takehide Sato

Yukimune Takahashi

Takehiko Yotsugi

Shinpei Nakata

Kunihiko Soma

This invention provides a cell made of polymers for spectra measurement while inhibiting a decrease in a molecular weight of resin caused by discharge treatment and having a stable hydrophilic modified surface. The hydrophilic resin cell is prepared by providing a polymeric resin cell between the two opposing electrodes, applying an electric field to a region between the above opposing electrodes under a nitrogen atmosphere with a pressure close to the atmospheric pressure to generate an electric discharge, and exposing the cell subjected to discharge treatment with a gas including oxygen.

Cell made of polymers for spectra measurement and method for producing the same

There is provided a high-accuracy automatic analysis device achieving both of measurement in a wide concentration range and high sensitivity at a low concentration. The signals of a plurality of wavelengths &#x3bb;to &#x3bb;where the sensitivity of light absorption caused by fine particles is high from a light sourceare converted to absorbances by a spectroscopic optical system (detector). The absorbances are converted to a secondary parameter from in which a noise component is cancelled by using a previously-defined conversion table, so that a concentration of a measured material (predetermined component) is calculated by an operation unit (calculating means)based on the secondary parameter. Thus, analysis being resistant to the noise even at the low concentration can be achieved in a range up to a high concentration.

Automatic analysis device

The present invention provides reaction cells capable of maintaining stable analytical performance by preventing bubble adhesion and reducing sample carryover even if the amount of sample liquid for a single test is further reduced in the future. The invention further provides an automatic analyzer that uses the reaction cells and a method for enhancing the hydrophilicity of the inner surfaces of the reaction cells. According to the invention, a reaction cell has a first electrode inserted thereinto and a second electrode disposed on the bottom side of the reaction cell. A voltage is applied between the first electrode and the second electrode to cause electric discharge between the electrodes. This allows for enhancing only the hydrophilicity of the bottom inner surface and the four bottom corners of the reaction cell to which large bubbles adhere easily.

Reaction cuvette for automatic analyzer and method of surface treatment for reaction cuvette

There is provided a highly reliable autoanalyzer less liable to sample and reagent carry-over and capable of preventing contamination and precisely pipetting samples and reagents. Using a sample pipetting nozzlehaving water-repellent surfaces, a sample is pipetted from a sample cellto a reaction cellhaving a hydrophilic bottom face.

Autoanalyzer and pipetting nozzle for autoanalyzer

The present invention provides a highly reliable reaction cuvette in which air bubbles are adhered little and mutual contamination can be prevented among samples and reagents in adjoining reaction cuvettes, a method of surface treatment for a reaction cuvette, and an automatic analyzer with the reaction cuvette mounted therein. The reaction cuvette according to the present invention, in which a sample and a reagent are mixed with each other and its concentration is measured, has an area subjected to hydrophilic treatment by electric discharging on inner and outer surfaces of the reaction cuvette. Further the reaction cuvette has a container-like form with its upper portion opened to provide an opening and its lower portion closed to provide a bottom. The hydrophilic area is present from a bottom of the reaction cuvette up to a midway to the opening.

An automatic analyzing apparatus has an analysis section including an immunity analysis unit and a biochemical componential analysis unit. A sample rack which has undergone the immunity componential analysis is horizontally fed by a rack feeding mechanism from a position confronting the inlet of a rack stationing section to a position near the outlet of the rack stationing section, so that the sample rack is directly moved to a return line, while skipping over the rack stationing section, so as to be efficiently returned to the analysis section and subjected to a subsequent biochemical analysis. A sample rack that needs reexamination by an identical analysis unit is also returned in the same efficient way.

Automatic analyzing apparatus

A communication unit () of a service center () transmits and receives information such as analysis information to and from a plurality of automatically analyzing apparatuses (). A database () stores the information such as the analysis information. An analysis information parsing unit () evaluates and parses results of analyses made by the automatically analyzing apparatuses using the analysis information stored in the database. The reagent parameter registration unit () registers information on reagents in the database (). The communication unit (), responsive to a request from an automatically analyzing apparatus, retrieves information on analysis parameters related to managed reagents from the database for transfer to the automatically analyzing apparatus. In this way, analysis parameters can be readily set for a testing item to be analyzed using a reagent.

Method of management of analytical data and system for management of analytical data

An apparatus for maintaining liquid temperature at a constant level comprises a reaction vessel for containing liquid, a cooling device connected with the reaction vessel for cooling the liquid, a heating device connected with the cooling device for heating the liquid cooled by the cooling device, a circulating device for circulating the liquid through and among the reaction vessel, the cooling device and the heating device, a temperature detecting device for detecting the temperature of the liquid heated by the heating device, a heat exchange rate control device for controlling the heat exchange rate between the cooling device and the liquid, and a control device for controlling the heating device and the heat exchange rate control device based on a control state of the apparatus and on the temperature difference between the detected temperature and a desired temperature.

Apparatus for maintaining liquid temperature at a constant level

A diagnosis apparatus for a photo coupler having at least one photo coupler including a light emitting element the amount of light emitted from which changes in accordance with the value of a current flowing therethrough and a light receiving element which receives the light from the light emitting element to convert it into an electric signal corresponding to the received amount of light, a checking current setting circuit for setting a current flowing through the light emitting element to a current value for checking, a level detecting circuit for controlling a current flowing through the light emitting element on the basis of the current value set by the checking current setting circuit, a reference signal generator for generating a reference signal, a comparing and detecting circuit for comparing the electric signal from the light receiving element with the reference signal and detecting the deterioration of a function of the photo coupler on the basis of the result of comparison.

Growing community of inventors

Hitachinaka, Japan

Hiroaki Ishizawa