Fluorescent Coating Evaluation for Protein Adsorbent Uniformity
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Solution Overview
Problem
It is challenging to confirm a uniform coating of protein adsorbents on complexly structured cell culture substrates using nondestructive tests, as existing methods are inadequate for evaluating the coating state on diversified and complicated substrate structures.
Innovation Solution
A method combining fluorescent dyes, protein adsorbents, and protein detection reagents is employed, where the substrate is irradiated with specific light to visualize the coating state by comparing fluorescence intensities in different configurations, allowing for nondestructive evaluation of protein adsorption and coating uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nondestructive test is used to evaluate coating state, then the substrate structure can be preserved and reused, but the test cannot effectively visualize coating uniformity on complicated substrate structures
Solution Approach 1:
A fluorescent dye is introduced as an intermediary substance that binds to the protein adsorbent coating on the substrate. When excited by light, the dye emits fluorescence that can be detected and visualized, allowing nondestructive evaluation of coating uniformity on complex substrate structures while preserving the substrate for reuse
Solution Approach 2:
The method utilizes fluorescence emission (a form of light/color change) from the dye molecules bound to the protein adsorbent. By irradiating the substrate with excitation light and detecting the emitted fluorescence, the coating state becomes visible without damaging the substrate, resolving the contradiction between nondestructive testing and visualization capability
2Measurement precision
If a fluorescent dye is used to visualize coating state, then coating uniformity can be detected, but additional steps for dye application and excitation are required
Solution Approach 1:
The fluorescent dye is combined with the protein adsorbent in the coating solution, so that when the coating is applied to the substrate, the dye is simultaneously deposited and bound to the protein adsorbent. This merging eliminates separate dye application steps and simplifies the overall evaluation process while maintaining precise coating state detection
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 enables effective visualization and evaluation of protein adsorption states and coating uniformity on complex substrate structures, facilitating the assessment of protein adsorbent distribution and protein presence, even on intricate surfaces like hollow fiber bioreactors.
Implementation Method 1
a coating layer containing a protein adsorbent and a fluorescent dye is formed on at least one surface of a polymer substrate, the color development state 1 of the substrate 1 is detected by irradiating the substrate 1 with light
Implementation Method 2
a coating layer containing a protein detection reagent is formed on the coating layer containing the protein adsorbent and the fluorescent dye, the color development state 2 of the substrate 2 is detected by irradiating the substrate 2 with light of the specific wavelength in which the protein detection reagent absorbs light
Data Source
Figure 1A~1D
Figure 2A~2D
Figure 3
AI summary
A method for evaluating a coating state of either an adsorbent of a sample protein (40) or an adsorption state of the sample protein, the method comprising: providing a polymer substrate 1 (10) having a coating layer (20) containing the adsorbent of the sample protein and a fluorescent dye formed on at least one surface of the polymer substrate, and irradiating the substrate 1 with light to detect a color state 1 of the substrate 1; providing a polymer substrate 2 having a first coating layer (20) containing the adsorbent of the sample protein and a fluorescent dye and a second coating layer (30) containing a protein detection reagent (31) which conjugates with the sample protein, the first and second coating layers being sequentially formed on at least one surface of the polymer substrate, and irradiating the substrate 2 with light to detect a color state 2 of the substrate 2; providing a polymer substrate 3 having a coating layer containing the adsorbent of the sample protein and a fluorescent dye formed on at least one surface of the polymer substrate, introducing a sample containing the sample protein, which absorbs the irradiated light, onto the substrate 3 to obtain a substrate 4, and irradiating the substrate 4 with light to detect a color state 3 of the substrate 4; providing a polymer substrate 5 having a coating layer containing the adsorbent of the sample protein and a fluorescent dye formed on at least one surface of the polymer substrate, introducing a sample containing the sample protein (40) onto the substrate 5 to obtain a substrate 6, introducing the protein detection reagent (31) which has a higher degree of light absorption than that of the sample protein and which conjugates with the sample protein onto the polymer substrate 6 to obtain a substrate 7, and irradiating the substrate 7 with light to detect a color state 4 of the substrate 7;and comparing the color state 4 with the color states 1, 2 or 3 to evaluate a coating state of the adsorbent of the sample protein or the adsorption state of the sample protein.