Abstract:
A chromatography device using a carrier and a porous channel formed by, e.g., electrolytic etching on a substrate as the column. The size of the column, the size of the device as a whole, and the required amount of sample are small.
Abstract:
The action of high-frequency AC electric field on a single-stranded nucleic acid being present in an aqueous solution is verified, and the action is utilized for enhancement of the efficiency of hybridization for conversion of the single-stranded nucleic acid to a companion complementary strand. There are provided, for example, a method of nucleic acid extension and nucleic acid extending apparatus, wherein high-frequency AC electric field is applied to a single-stranded nucleic acid being present in liberated form in pure water or an aqueous solution of 5 to 11 pH (R), or to a single-stranded nucleic acid fixed onto the surface (f) of one or both (E) of counter electrodes (E,E) provided so as to face the aqueous solution (R), thereby extending the single-stranded nucleic acid.
Abstract:
PURPOSE:To discover suspension, hooking-off conditions, and abnormality, etc., of a telephone set on a terminal side, by discriminating the state of a communication circuit from the state of the output voltage of the exchange of a central telephone exchange and alarming the terminal equipment by sending a signal when abnormality occurs in the output voltage. CONSTITUTION:In a machine guarding system, a terminal main body 13 connected with a pheripheral device 8, telephone set 8, and emergency button 14, is connected with a host computer 1 through a telephone circuit. A detecting circuit 10 detects the voltage across both ends of the telephone circuit and discriminates a busy or abnormal condition by comparing the detected voltage with the reference voltages of exchanges 3 and 4 by means of a discriminating circuit 11. Then the circuit 10 transmits the compared signal to the terminal main body 13 and emergency button 14 through a converting circuit 12 and causes a warning lamp to the driven. Therefore, the state of a telephone set can be informed to the operator of the terminal equipment.