Abstract: An analyzer and a structure for analysis with high performance are provided which can reduce contamination between the reagents when the valve components or a plurality of reagents are included.

Abstract: A nucleic-acid amplifying apparatus comprising: a flow passage, through which a reaction fluid containing a sample containing a nucleic acid and a reagent flows, said flow passage including, a flow passage branch portion, at which the flow passage branches into a plurality of branch flow passages, a junction portion, at which the plurality of branch flow passages join, and a joined flow passage, through which the reaction fluid as joined is conducted; and a heating mechanism having a plurality of set temperature zones provided on the branch flow passages.

Abstract: In a chemical analysis apparatus for extracting a specific substance, such as nucleic acid, from a sample containing a plurality of chemical substances, solutions remaining in valves are prevented so that a reagent in an earlier step does not contaminate the subsequent steps. Predetermined quantities of solutions are carried and supplied by centrifugal force without providing valves for controlling the flow of the solutions. After perforating the lids of ventilation holes 272, 273, 274 communicated with a detection container 450 and disposal containers 460 and 470 in an analysis disc 2, the analysis disc 2 is rotated to supply and carry a predetermined quantity of the sample.