Stabilisation Features for Gas Management in Liquid Cells
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Solution Overview
Problem
The processing of biological samples in composite liquid cells (CLCs) is hindered by the presence of gases, which causes handling and alignment issues, particularly during thermal changes, leading to cross-contamination and inefficiencies in optical detection systems.
Innovation Solution
The implementation of gas stabilization features, such as channels and tapered shapes in control surfaces, encourages gas exit from CLCs, reducing gas retention and improving alignment for precise optical detection, while degassing methods like negative pressure and agitation minimize gas presence within the cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas is present in CLC during thermal changes, then chemical reactions can occur, but handling and alignment become problematic
Solution Approach 1:
The patent extracts gas from the CLC system by providing gas escape channels and pathways. The control surface includes channels that allow gas to escape from the CLC during thermal processing, separating the gas phase from the liquid reaction environment and eliminating handling problems while maintaining reaction efficiency.
Solution Approach 2:
The control surface is segmented into multiple functional regions including gas escape channels, CLC containment areas, and thermal processing zones. This segmentation allows independent optimization of gas removal and reaction conditions, resolving the contradiction between maintaining reactions and eliminating gas-related handling issues.
2Productivity
If gas is retained in CLC, then reactions can proceed, but optical detection accuracy deteriorates
Solution Approach 1:
Gas is extracted from the optical detection path through dedicated escape channels that remove gas bubbles before they can interfere with optical measurements. The control surface design ensures gas is removed from the CLC before it reaches the optical detection zone, maintaining both reaction completion and measurement precision.
Solution Approach 2:
The control surface acts as an intermediary structure that manages gas-liquid interaction and directs gas flow away from the optical detection zone. It mediates between the reaction requirements (gas presence for some reactions) and detection requirements (gas-free optical path) by providing controlled gas escape pathways.
3Temperature
If CLC is heated for processing, then biological samples can be processed, but gas expansion causes misalignment
Solution Approach 1:
The control surface is divided into thermal processing regions and alignment reference regions. The gas escape channels are segmented throughout the structure, providing continuous gas removal pathways during heating that prevent gas expansion-induced misalignment while maintaining thermal processing capability.
Solution Approach 2:
Gas escape channels are pre-configured in the control surface before thermal processing begins. This preliminary action ensures that gas can immediately escape upon heating, preventing gas expansion that would cause misalignment during the thermal processing process.
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
This approach enhances the repeatability and accuracy of CLC placement, reduces cross-contamination, and improves data quality by minimizing gas interference, as demonstrated by a six-fold reduction in standard deviation of optical intensity counts.
Implementation Method 1
The stabilisation feature can include a hydrophobic wall defining a vessel. The vessel can define a central portion sized and shaped to snugly contain a composite liquid of a predetermined size, a vertical axis, and at least one channel portion adapted to flow gas away from the central portion.
Implementation Method 2
Degassing some or all of the reaction components prior to processing can result in CLCs that contain less gas than would otherwise be present. A typical method of degassing a fluid is to place it in negative pressure to remove any dissolved gases.
Implementation Method 3
Heating and/or agitating the fluid while under negative pressure can augment this process.
Implementation Method 4
Heating and/or agitating the fluid while under negative pressure can augment this process.
Data Source
AI summary
Devices, systems and methods for making and handling liquid samples are disclosed.