Recently, conductive polymers have been introduced for thermocycling to further reduce the thermal barrier between the heating/cooling material and the reaction media. Using electrically conductive polymers as reaction vessel, each reaction can be temperature-controlled independently using infrared temperature sensors. This results in high-temperature uniformity between samples and increased flexibility by allowing individual temperature cycling for different tubes in the same plate. Direct heating of the reaction tubes results in temperature transfer rates up to 15°C/sec, enabling shorter cycling times. The BioGene InSyte uses conductive polymers for thermocycling.
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The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.