摘要:
An oxygen electrode used to measure an amount of dissolved oxygen in a liquid culture medium includes an electrode base material, and a surface metal layer being any one of Au, Pt, and Ti. The surface metal layer covers a surface of the electrode base material. Especially, in a case where the surface metal layer of Au is formed on the electrode base material of copper with electroplating, a nickel layer is formed on the surface of the electrode base material by layering with electroplating, etc. Then, the Au layer is formed on the nickel layer by layering with electroplating, etc.
摘要:
A method of measuring the number of bacteria according to the present invention includes step (a) through step (d). First, in step (a), a to-be-measured sample (specimen) including a predetermined bacterial strain (such as Escherichia coli or coliform bacteria) is added to a predetermined medium (such as a medium used for a specific enzyme substrate culture medium method). In step (b), a current value flowing through the medium added with the sample is measured with an oxygen electrode at a predetermined temperature and at a predetermined constant voltage. In step (c), time required is measured for the current value that has decreased temporarily after starting the measurement of step (b) to increase thereafter to exceed a predetermined threshold value. In step (d), the initial number of bacteria of the bacterial strain included in the sample is calculated based on the time required.
摘要:
Various settings used in a process proceeding in line with a flow chart are reset. An oxygen current is measured. A slope of the oxygen current is obtained. A determination is made as to whether or not the slope can be considered to become stable. A first measuring time is determined. In order to determine the stability of the slope, the oxygen current is sequentially measured and the slope of the oxygen current is updated until the slope is determined to become stable. When the slope is determined to become stable, the first measuring time is determined. When the slope is not determined to become stable, the oxygen current is further measured.
摘要:
A sanitary measurement system is configured and arranged to reduce a load relating to sanitary measurement in a plurality of food factories. The sanitary measurement system registers a plurality of food factories, manages and effectively utilizes sanitary information obtained from the food factories. The sanitary measurement system includes a sanitary information managing server and a measuring device. The measuring device performs sanitary inspection in each food factory, and sends data (sanitary information) formed of a result of the inspection to the sanitary information managing server.
摘要:
A method of measuring the number of bacteria according to the present invention includes step (a) through step (d). First, in step (a), a to-be-measured sample (specimen) including a predetermined bacterial strain (such as Escherichia coli or coliform bacteria) is added to a predetermined medium (such as a medium used for a specific enzyme substrate culture medium method). In step (b), a current value flowing through the medium added with the sample is measured with an oxygen electrode at a predetermined temperature and at a predetermined constant voltage. In step (c), time required is measured for the current value that has decreased temporarily after starting the measurement of step (b) to increase thereafter to exceed a predetermined threshold value. In step (d), the initial number of bacteria of the bacterial strain included in the sample is calculated based on the time required.
摘要:
A method of constructing a calibration curve in a determination of microbial counts is provided. An immunoassay of the present invention is characterized in that samples of a specimen material are prepared so that microbial counts therein are altered.