Abstract: A sample carrier is used in a rotation-based method for reproducing or detecting DNA. The sample carrier has a disc-like main part and a plurality of cavities formed in the main part, in which cavities, a sample fluid at least potentially containing DNA is received. A disc side of the main part forms a heat entry side and the flat side facing away therefrom forms a heat discharge side. The cavity or one of a plurality of cavities, as applicable, is formed by an annular channel having a first and a second channel portion, which are fluidically connected at both longitudinal ends by a connection portion in each case. The first channel portion is arranged offset relative to the second channel portion in the thickness direction of the main part.

Abstract: The invention relates to a cartridge for an analysis method which is rotation-based and utilizes one-sided heat input. The cartridge has a planar main body in which a microfluidic channel-and-chamber structure is formed, with channels interconnecting multiple process chambers, a number of positioning and/or fastening elements, formed in the main body, for positioning and/or fastening the main body on/to a support plate of an analyzer for carrying out the analysis method, and a cover body which is fastened to the main body and which is one-sidedly arranged on a top side of the main body that faces away from a heat input side and which covers at least a chamber.

Abstract: A method for multiplying DNA includes using a rotation device to rotate a sample carrier about an axis of rotation. The sample carrier has at least one cavity in which a sample liquid containing DNA is received. The cavity is heated to a high temperature value only on a heat input side lying in a rotation plane by using a heating device. As a result of the heating, a convection current is created in the sample liquid in the cavity, the convection current having substantial current components directed perpendicularly to the rotation plane. A circulation time of a liquid particle along a current path of the convection current is predetermined by the speed of the rotation. A rotation device for multiplying DNA and a system for multiplying DNA, are also provided.