Sodium Hydroxide Lysis
Sodium Hydroxide Lysis - Related Videos
04:11
Isolation of Endospores from an Environmental Sample by Targeted Lysis of Vegetative Cells
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2025
Source: Wunderlin, T., et al. Physical Isolation of Endospores from Environmental Samples by Targeted Lysis of Vegetative Cells. J. Vis. Exp. (2016)This video demonstrates a method to isolate endospores from an environmental sample containing both vegetative cells and various bacteria. The procedure involves filtration, mechanical disruption, and selective chemical treatment to weaken and lyse vegetative cells while preserving endospores. The final step isolates the resilient endospores through...
03:12
A Procedure for Bacterial Harvesting and Mechanical Lysis
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2025
Source: Mercier, N., et al. MS2-Affinity Purification Coupled with RNA Sequencing in Gram-Positive Bacteria. J. Vis. Exp. (2021)This video demonstrates a step-by-step procedure for harvesting bacterial cells and mechanically lysing them to release intracellular contents.
09:38
Physical Isolation of Endospores from Environmental Samples by Targeted Lysis of Vegetative Cells
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Cited by 17 •
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A method to single out bacterial endospores from complex microbial communities was developed to perform tailored culture or molecular studies of this group of bacteria.
05:50
Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments
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Cited by 2 •
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An ultrafine aluminum hydroxide nanoparticle suspension was prepared via the controlled titration of [Al(H2O)]3+ with L-arginine to pH 4.6 with and without cage-effect confinement within mesoporous channels of MCM-41.
01:32
Tissue Homogenization and Cell Lysis
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2023
Tissue homogenization involves disintegrating tissue architecture and lysing cells, and is an early step in isolating and analyzing cellular components. The method used for homogenization depends on the sample type, the amount of sample available, the analyte to be obtained, and the sensitivity of the method. These methods are broadly classified as mechanical and non-mechanical methods. Mechanical methods of tissue homogenization These methods rely on applying external physical force to disrupt...
FAQs
Sodium hydroxide raises the pH, while SDS disrupts bacterial membranes and denatures proteins and DNA. Together, these chemical effects convert intact cells into a lysate containing released nucleic acids. Subsequent neutralization allows small circular plasmids to re-form, establishing the chemical basis for separating plasmid DNA from much of the chromosomal DNA and cellular debris.
The separation depends on differences in molecular form and behavior during neutralization. Small, circular plasmids can re-form after the alkaline conditions are reversed, whereas much of the chromosomal DNA, along with cellular debris, precipitates. This differential response enriches the soluble preparation for plasmids without requiring the two DNA types to be separated by size alone.
Neutralization changes the strongly alkaline environment after cell disruption and denaturation. Under these new conditions, small circular plasmids can re-form, while much of the chromosomal DNA and cellular debris precipitates. This step therefore does more than restore a favorable chemical condition: it creates the separation that makes the lysate useful for plasmid-focused genetics workflows.
The workflow begins with bacterial cells, followed by alkaline treatment with sodium hydroxide, typically alongside SDS, to disrupt membranes and denature cellular components. The lysate is then neutralized so plasmids can re-form while chromosomal DNA and debris precipitate. The resulting plasmid-containing preparation can proceed to downstream genetic analysis or manipulation.
Sodium hydroxide supplies the alkaline condition required for denaturation, and SDS typically provides detergent-mediated membrane disruption. A subsequent neutralization step is essential for differential recovery of small circular plasmids. These components form the core chemical sequence of the preparation, while the bacterial cells provide the starting biological material for plasmid extraction.
The resulting plasmid preparation can support restriction analysis, PCR, sequencing, and transformation. These applications allow researchers to examine genetic constructs, assess recombinant DNA, or introduce plasmids into other experimental systems. Sodium hydroxide lysis is therefore most useful when a rapid, scalable preparation is needed before analyzing or manipulating plasmid-based genetic material.
Recombinant DNA experiments often depend on recovering plasmids that carry genetic constructs. By enriching for small circular plasmids while precipitating much chromosomal DNA and debris, this method provides a practical starting material for examining those constructs. Its rapid and scalable character makes it suitable for repeated plasmid preparation in genetics research.