OTU69 qPCR Soil Mercury Detection for Rapid Site Screening
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Solution Overview
Problem
Traditional methods for detecting soil quality indicators in urban relocation sites are labor-intensive, time-consuming, and costly, making rapid detection of large quantities of samples difficult, particularly for mercury content, which poses a significant threat to ecological environments and human health.
Innovation Solution
A method using archaea molecular marker OTU69 with a specific primer and probe set for real-time fluorescent quantitative PCR to rapidly detect total mercury content in soil, involving DNA extraction, PCR amplification, and fluorescence quantification to calculate mercury content through a linear equation based on copy number.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional physical and chemical detection methods are used to detect soil quality indicators, then detection accuracy is maintained, but detection time and labor cost increase significantly
Solution Approach 1:
The patent replaces traditional mechanical physical and chemical detection methods with a molecular biology-based detection system. Specifically, it uses real-time fluorescent quantitative PCR to detect archaea molecular markers (OTU69, OTU384) that correlate with mercury content, substituting complex chemical analysis with nucleic acid amplification and fluorescence detection, thereby reducing detection time while maintaining accuracy
Solution Approach 2:
The patent introduces archaea molecular markers (OTU69, OTU384) as intermediary indicators to detect mercury pollution indirectly. Instead of directly measuring mercury content through complex chemical methods, the system uses these microbial markers that respond to mercury stress, simplifying the detection process while maintaining correlation with actual mercury levels
2Quantity of substance
If traditional detection methods are used for large quantities of samples, then comprehensive coverage is achieved, but resource consumption and cost increase
Solution Approach 1:
The patent replaces resource-intensive traditional chemical detection with a more efficient molecular biology system. The real-time fluorescent quantitative PCR method requires smaller sample amounts, uses automated instrumentation, and produces results faster, thereby improving detection efficiency while handling large quantities of samples with reduced resource consumption
Solution Approach 2:
The patent changes the detection parameter from direct mercury concentration measurement to archaea molecular marker abundance detection. This parameter transformation enables high-throughput processing since PCR amplification can be performed in parallel for multiple samples simultaneously, significantly improving productivity for large sample volumes
3Productivity
If archaea molecular marker detection is used to rapidly detect mercury content, then detection speed and automation are improved, but method complexity increases
Solution Approach 1:
The patent uses universal archaea 16S rRNA gene primers (524F and Arch958R) that can detect multiple archaea molecular markers (OTU69, OTU384) simultaneously through a single PCR reaction system. This multi-functional approach allows detection of different mercury-responsive markers without requiring separate assays, managing method complexity while maintaining detection speed
Solution Approach 2:
The patent employs real-time fluorescent quantitative detection with Taqman probes that provide continuous feedback during PCR amplification. The fluorescence signal intensity directly correlates with the abundance of target molecular markers, allowing automated quantification and eliminating the need for post-PCR analysis steps, thereby maintaining detection speed despite the molecular biology complexity
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 rapid, automated detection of mercury content in soil with reduced sample and labor requirements, facilitating efficient evaluation of large quantities of samples and ensuring ecological safety.
Implementation Method 1
The Taqman probe has a fluorescent group at the 5′end and a fluorescence quenching group at the 3′end
Data Source
AI summary
The present invention discloses a method for rapidly detecting the total mercury content of soil in urban relocation sites using archaea molecular marker OTU69. The present invention provides a DNA molecule (probe), as shown in SEQ ID NO. 1 of the sequence listing. The present invention also protects the application of the probe in detecting or assisting in detecting the total mercury content of the soil. The present invention also protects the application of the probe in comparing the total mercury content of the soil in different plots. Using the method provided by the present invention to detect the total mercury content of the soil or compare the total mercury content of the soil of different plots has the following advantages: small sample demand, no need for pre-treatment, short required time, low labor cost, and realizing the rapid automatic detection of large quantities of samples.