Continuous Thermal Cycle System for DNA Amplification
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Solution Overview
Problem
Existing continuous thermal cyclers for DNA amplification are inefficient, labor-intensive, and not easily adaptable to different PCR reaction requirements, limiting their ability to mass produce DNA strands and maintain precise temperature control.
Innovation Solution
A continuous thermal cycle system with a temperature control body having multiple, independently controlled sectors and a grooved channel for fluid flow, allowing for efficient and scalable DNA amplification, with a means for regulating temperature and moving reactants through cyclical temperature zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a static reactor with discrete tubes is used for PCR, then individual reaction control is achieved, but the process becomes time intensive and labor intensive
Solution Approach 1:
The continuous reactor is divided into multiple discrete temperature zones (denaturation zone at 95°C, annealing zone at 55°C, extension zone at 72°C) that correspond to different PCR steps. This segmentation allows simultaneous execution of multiple PCR cycles in different zones, achieving continuous processing while maintaining individual reaction control through spatial separation.
Solution Approach 2:
The system enables continuous PCR processing by maintaining reactants in continuous flow through all temperature zones simultaneously. Multiple PCR cycles occur in parallel across different zones, eliminating the sequential processing time of traditional methods while maintaining precise temperature control for each reaction step.
2Adaptability or versatility
If traditional thermal cyclers are used, then DNA amplification is achieved, but the system is not easily adaptable to different PCR reaction requirements
Solution Approach 1:
The system incorporates adjustable flow rates and variable residence times in each temperature zone, allowing dynamic optimization for different PCR applications. The continuous flow mechanism enables flexible adjustment of reaction conditions without requiring physical reconfiguration of the reactor structure.
Solution Approach 2:
The continuous reactor design serves multiple functions: it performs denaturation, annealing, and extension simultaneously in different zones, and can be adapted for various PCR applications by adjusting flow parameters. This universal design eliminates the need for separate reactors for different PCR types.
3Productivity
If carrier fluid is used to separate DNA strands in continuous thermal cycler, then processing speed is accelerated, but the device becomes labor intensive for setup and modification
Solution Approach 1:
The system extracts and eliminates the need for immiscible carrier fluids by using a continuous flow reactor where reactants are delivered directly through tubing to each temperature zone. This removes the complexity of carrier fluid management while maintaining continuous processing capability.
Solution Approach 2:
The continuous flow system automatically delivers reactants through the temperature zones without requiring manual intervention for carrier fluid handling. The system self-regulates the reaction process through controlled flow rates, eliminating labor-intensive setup and modification procedures.
4Temperature
If tubing is wrapped around separate cylinders for temperature zones, then temperature control is achieved, but thermal energy is unintentionally lost or gained at gaps between cylinders
Solution Approach 1:
The system merges all temperature zones into a single continuous reactor body with integrated heating elements, eliminating gaps between separate cylinders. This unified structure ensures consistent thermal contact throughout the entire reactant path, preventing energy loss at interfaces while maintaining precise temperature control in each zone.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid and large-scale DNA amplification with enhanced efficiency and adaptability, achieving mass production of DNA strands at lower costs compared to conventional methods.
Implementation Method 1
A continuous thermal cycle system with a temperature control body having multiple, independently controlled sectors and a grooved channel for fluid flow, allowing for efficient and scalable DNA amplification, with a means for regulating temperature
Implementation Method 2
a grooved channel for fluid flow, allowing for efficient and scalable DNA amplification, with a means for regulating temperature and moving reactants through cyclical temperature zones
Data Source
AI summary
A thermal cycle system and method suitable for mass production of DNA comprising a temperature control body having at least two sectors. Each sector has at least one heater, cooler, or other means for changing temperature. A path traverses the sectors in a cyclical fashion. In use, a piece of tubing or other means for conveying is placed along the path and a reaction mixture is pumped or otherwise moved along the path such that the reaction mixture is repetitively heated or cooled to varying temperatures as the reaction mixture cyclically traverses the sectors. The reaction mixture thereby reacts to form a product. In particular, polymerase chain reaction reactants may continuously be pumped through the tubing to amplify DNA. The temperature control body is preferably a single aluminum cylinder with a grooved channel circling around its exterior surface, and preferably has wedge-shaped or pie-shaped sectors separated by a thermal barrier.