Aptamer-Quantum Dot Biorecognition Element for Fuel Biocontamination Detection
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Solution Overview
Problem
Current methods for detecting biocontamination in fuel systems are cumbersome, inaccurate, and time-consuming, often requiring specialized laboratories and equipment, and fail to differentiate between living and non-living microbes, leading to delayed detection and increased repair costs.
Innovation Solution
Development of biorecognition elements, such as peptide-based aptamers conjugated with quantum dots, for rapid and accurate detection of biocontamination, allowing for the isolation and labeling of microbes in fuel samples, followed by fluorescence or chemiluminescent detection using a biocontamination assay kit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods (PCR, sequencing, colony counting) are used, then detection accuracy can be maintained, but detection time increases and requires specialized laboratories and equipment
Solution Approach 1:
The patent extracts the detection function from complex laboratory instrumentation to a simplified field-deployable sensor system. The biorecognition element (aptamer) specifically binds to microbial components, and the quantum dot provides direct optical signal transduction, eliminating the need for PCR instruments, sequencing equipment, or colony counting apparatus while maintaining detection accuracy.
Solution Approach 2:
The patent replaces mechanical/biological processes (colony growth on plates, PCR amplification cycles, sequencing reactions) with an optical detection system. The quantum dot's photoluminescence properties enable direct optical detection of bound microbes, substituting time-consuming mechanical and biochemical processes with rapid optical measurement.
2Measurement precision
If molecular-based instrumentation (PCR, sequencing) is used, then quantitative detection is achieved, but the method cannot differentiate between living and non-living microbes and requires expensive equipment
Solution Approach 1:
The patent employs disposable biorecognition elements (aptamers) conjugated to quantum dots that can be directly applied to fuel samples. These single-use detection elements eliminate the need for expensive, complex, and reusable laboratory instrumentation while providing quantitative detection capability through optical signal intensity measurement.
Solution Approach 2:
The patent introduces an intermediary optical detection system using quantum dots as signal transducers. The quantum dots bind to or near the microbes and convert the biological recognition event into a measurable optical signal, enabling quantitative detection without requiring complex molecular instrumentation and allowing differentiation of viable microbes through metabolic activity indicators.
3Ease of manufacture
If colony counting methods are used, then expensive instrumentation is avoided, but the method is very time consuming and only detects culturable bacteria representing 10% of total bacteria
Solution Approach 1:
The patent creates a universal detection system using aptamers that can bind to conserved microbial components present in all bacteria, not just culturable species. The quantum dot-based optical detection method works across diverse microbial types, providing both cost-effectiveness and broad coverage of total bacterial populations including non-culturable species.
Solution Approach 2:
The patent performs preliminary binding of the biorecognition element to target microbes directly in the fuel sample before detection. This preliminary recognition step occurs in situ without requiring time-consuming culture growth periods, enabling rapid detection of both culturable and non-culturable bacteria through direct optical signal measurement.
4Reliability
If antibody-based detection methods are used, then detection capability is provided, but antibodies are affected by degradation and negatively influenced by the presence of fuel
Solution Approach 1:
The patent changes the chemical parameters of the biorecognition element from protein-based antibodies to nucleic acid-based aptamers. Aptamers exhibit superior chemical stability in fuel environments, resisting degradation from hydrocarbons, oxidants, and varying pH conditions. This parameter change maintains detection capability while dramatically improving reagent stability for long-term deployment in fuel systems.
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 quick, reliable, and accurate detection of biocontamination in fuel systems, reducing repair costs and extending the usable lifetime of vehicle and fuel systems by allowing for early intervention in biofouling mitigation.
Implementation Method 1
The reporter molecule may be fluorescent molecule, a chemiluminescent molecule, a colorimetric molecule, or a signal transducing nanomaterial
Implementation Method 2
The reporter molecule may be fluorescent molecule, a chemiluminescent molecule, a colorimetric molecule, or a signal transducing nanomaterial
Data Source
AI summary
A biorecognition element for detection of fuel biocontamination. The biorecognition element includes a sequence selected from SEQ. ID No. 10, SEQ. ID No. 13, SEQ. ID No. 22, SEQ. ID No. 27, SEQ. ID No. 31, SEQ. ID No.40, SEQ. ID No.67, SEQ. ID No. 68, SEQ. ID No. 69, SEQ. ID No. 70, SEQ. ID No. 71, and SEQ. ID No.72, an amine-functionalized quantum dot, a C-terminal, three-glycine plus cysteine linker, and a reporter molecule conjugated to the amine-functionalized quantum dot. Biocontaminants are labeled by the biorecognition element and observed via the reporter molecule of the biorecognition element.