Nucleic Acid Isolation from Hydrocarbon Samples
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Solution Overview
Problem
Current methods for detecting hydrocarbon accumulations, such as seismic imaging and non-seismic technologies, face challenges in fidelity and accuracy, particularly in identifying and locating subsurface hydrocarbon reservoirs, and existing nucleic acid extraction techniques struggle with isolating nucleic acids from field samples containing hydrocarbons, which hinders the determination of hydrocarbon sources.
Innovation Solution
The method involves adding a chelating agent to block nucleic acid binding sites on contaminants, using a solvent mixture like phenol-chloroform-isoamyl alcohol for separation, and applying heat or freeze-thaw cycles to isolate nucleic acids from field samples, enabling effective sequencing and genomic profiling for hydrocarbon reservoir identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional nucleic acid extraction methods are used on field samples containing hydrocarbons, then the extraction process becomes contaminated with hydrocarbons and other contaminants, but the nucleic acid yield and purity are significantly reduced
Solution Approach 1:
The extraction process is divided into distinct sequential steps: (1) chelating agent treatment to block contaminant binding sites, (2) solvent mixture addition for phase separation, (3) heating to remove hydrocarbons, and (4) freeze-thaw cycles for cell lysis. This segmentation allows each step to address specific contaminants while preserving nucleic acids, resolving the contradiction between yield and purity.
Solution Approach 2:
The chelating agent is added before other extraction steps to preemptively block nucleic acid binding sites on contaminants. This preliminary action prevents contaminant-nucleic acid interactions that would otherwise reduce purity, while not interfering with subsequent nucleic acid recovery steps that maintain yield.
2Productivity
If field samples containing hydrocarbons are processed using standard extraction protocols, then the samples can be processed quickly, but the sequencing accuracy and hydrocarbon source determination are compromised
Solution Approach 1:
The protocol modifies several parameters: adding chelating agents to change chemical binding conditions, using solvent mixtures to change phase separation properties, applying heat to change hydrocarbon volatility, and using freeze-thaw cycles to change cell membrane permeability. These parameter changes enable effective contaminant removal while maintaining processing efficiency, thus improving sequencing accuracy without sacrificing productivity.
3Ease of operation
If hydrocarbons are not removed from field samples, then the sample processing remains simple and fast, but the nucleic acid sequencing and microorganism identification become unreliable
Solution Approach 1:
The chelating agent acts as an intermediary that blocks the interaction between contaminants and nucleic acids. By introducing this intermediary substance, the protocol effectively removes the harmful effect of hydrocarbons and other contaminants on sequencing reliability, while the overall process remains relatively simple and does not require complex additional equipment or procedures.
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 approach enhances the extraction and sequencing of nucleic acids from diverse field samples, providing more accurate determination of hydrocarbon sources and improving the likelihood of identifying proximate hydrocarbon reservoirs, while being applicable across various sample types and environments.
Implementation Method 1
adding a chelating agent to the sample to block at least a portion of the nucleic acid binding sites on contaminants in the sample
Implementation Method 2
adding a solvent mixture, such as phenol-chloroform-isoamyl alcohol, to the sample to aid in the separation of the nucleic acids from organic contaminants in the sample
Implementation Method 3
heating the sample to aid in the removal of hydrocarbons from the sample
Implementation Method 4
using freeze-thaw cycles to lyse cells in the sample
Data Source
AI summary
Techniques and methods are provided for isolating nucleic acids from a sample. The methods include adding a chelating agent to the sample to block nucleic acid binding sites on contaminants in the sample; heating the sample to remove hydrocarbons; and lysing the cells using freeze-thaw cycles.