Coated Beads Drying on Permeable Surface
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Solution Overview
Problem
Existing methods for coating beads with biological molecules for immunoassays often result in clumped, non-free-flowing beads due to non-specific binding, which compromises the stability and shelf life of proteins, leading to reduced assay performance.
Innovation Solution
A method involving coating beads with biological molecules, mixing with a liquid stabilizing/blocking agent, and drying them on a partially liquid-permeable surface, such as filter paper, to create a protective shell and prevent clumping, while ensuring the beads remain free-flowing and stable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If beads are coated with biological molecules using conventional methods, then the coating process is simple, but the beads clump together and become non-free-flowing
Solution Approach 1:
A liquid stabilizing and/or blocking agent is introduced as an intermediary substance between the coated beads during drying. This agent forms a protective shell around each bead, preventing direct contact and non-specific binding between beads, thereby maintaining free-flowing properties while allowing simple coating processes
2Ease of manufacture
If beads are dried using conventional methods, then the drying process is simple, but protein activity is lost and beads clump
Solution Approach 1:
The liquid stabilizing and/or blocking agent is applied beforehand to coated beads before drying. This agent cushions and protects the biological molecules during the drying process, preventing denaturation and maintaining protein activity while enabling simple drying procedures
3Ease of manufacture
If conventional coating methods are used, then the manufacturing process is straightforward, but shelf life is reduced due to non-specific binding
Solution Approach 1:
The liquid stabilizing and/or blocking agent serves as a protective intermediary that remains with the beads after coating and drying. This agent continuously blocks non-specific binding sites throughout storage, extending shelf life while maintaining straightforward manufacturing processes
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 method ensures uniformly coated, free-flowing beads with extended stability and minimal loss of protein activity, maintaining the integrity of the biological molecules and enhancing the shelf life of immunoassay solid supports.
Implementation Method 1
The liquid stabilizing and/or blocking agent is mixed with the coated beads... dispersing the coated beads still substantially surrounded by a liquid phase comprising the liquid stabilizing and/or blocking agent
Implementation Method 2
drying the beads on the surface to substantially remove the liquid phase
Data Source
AI summary
The invention relates to a method of coating beads with a biological molecule comprising: (i) coating a plurality of beads with the biological molecule; (ii) mixing the coated beads with a liquid stabilizing and/or blocking agent (iii) dispersing the coated beads still substantially surrounded by a liquid phase comprising the liquid stabilizing and/or blocking agent across a surface that is at least partially liquid permeable; (iv) drying the beads on the surface to substantially remove the liquid phase; and (v) removing the dried beads from the surface.