Graphene Oxide βHB Biosensor for Rapid Ketosis Detection
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Solution Overview
Problem
Current diagnostic tools for detecting diseases in livestock, such as subclinical ketosis in dairy cows, are costly, time-consuming, and lack precision, with existing biosensors having low sensitivity and high false-positive rates, making on-site detection challenging.
Innovation Solution
A biosensor system utilizing graphene oxide-coated electrodes with β-hydroxybutyrate dehydrogenase (βHBD) and β-nicotinamide adenine (NADH) enzymes, stabilized by agents like glycerol, for rapid and sensitive detection of βHB in biofluids, integrated with a potentiostat and electrodes for electrochemical analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional diagnostic tools are used for detecting diseases in livestock, then detection accuracy is improved, but cost and time consumption increase
Solution Approach 1:
The patent employs disposable microfluidic cartridges with integrated reagents and sensors that are discarded after single use. This eliminates the need for complex cleaning and calibration procedures, enabling rapid on-site testing while maintaining diagnostic accuracy through factory-prepared reagent formulations.
Solution Approach 2:
The diagnostic system incorporates automated sample processing, reagent mixing, and result interpretation capabilities within the portable device. The microfluidic system automatically guides the sample through multiple test channels without manual intervention, reducing both time consumption and the need for trained operators.
2Ease of operation
If existing biosensors are used for analyte detection, then portability is improved, but sensitivity and false-positive rate worsen
Solution Approach 1:
The patent utilizes composite sensor platforms combining multiple sensing mechanisms (electrochemical, optical, and piezoelectric elements) within a single portable device. This multi-modal approach enhances sensitivity by detecting analytes through multiple independent pathways, reducing false positives while maintaining portability through integrated miniaturized components.
Solution Approach 2:
The microfluidic device incorporates porous filtration membranes and adsorption materials that pre-concentrate analytes from the sample before detection. This pre-concentration step significantly enhances sensitivity for low-abundance biomarkers while the entire system remains portable and requires no external laboratory equipment.
3Reliability
If traditional diagnostic methods are used, then detection reliability is improved, but cost increases
Solution Approach 1:
The diagnostic system divides the testing process into separate modular components: sample collection, preparation, multi-analyte detection, and result interpretation. Each module uses cost-effective reagents and sensors optimized for its specific function, reducing overall material costs while maintaining reliable detection through specialized design of each segment.
Solution Approach 2:
The portable device is designed to detect multiple different analytes (inflammatory markers, metabolic indicators, infectious agents) using a single integrated platform with universal sample processing. This multi-functionality reduces per-test costs by sharing common components across different diagnostic applications while maintaining reliable detection for each specific analyte.
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
The system achieves a low limit of detection (0.1-0.3 nM) for βHB, enabling rapid, accurate, and cost-effective on-site diagnosis of ketosis, supporting precision livestock farming by reducing healthcare costs and improving animal well-being.
Implementation Method 1
a first electrode, modified with at least one layer of graphene oxide
Implementation Method 2
an enzyme layer, coated onto a surface of the graphene oxide layer, wherein the enzyme layer comprises beta-hydroxybutyrate dehydrogenase
Implementation Method 3
the enzyme layer comprises beta-hydroxybutyrate dehydrogenase, beta-nicotinamide adenine (NADH)
Implementation Method 4
integrated with a potentiostat and electrodes for electrochemical analysis
Data Source
AI summary
In one aspect, the disclosure relates to a system and an apparatus comprising electrodes and a support. The disclosure also relates to methods for measuring an analyte in a biological sample using any one of the systems disclosed herein. Also disclosed herein are methods for fabricating a sensor. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.