Liquid Nitrogen Processing
Liquid Nitrogen Processing - Related Videos
09:05
Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
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Cited by 9 •
2015
Nitrogen is an effective supercritical fluid for extraction or drying processes due to its small molecular size, high density in the near-liquid supercritical regime, and chemical inertness. We present a supercritical nitrogen drying protocol for the purification treatment of reactive, porous materials.
01:29
Process of Liquidation
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2026
Liquidation in a partnership represents the formal process of dissolving the business and distributing its resources in an orderly manner. Unlike routine operations, liquidation involves converting all assets into cash, settling outstanding obligations, and equitably distributing any residual funds to partners. This ensures that creditors are prioritized and that the final settlement reflects each partner’s agreed share of the business. Common causes of liquidation include retirement,...
06:42
A Multi-hole Cryovial Eliminates Freezing Artifacts when Muscle Tissues are Directly Immersed in Liquid Nitrogen
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Cited by 9 •
2017
This protocol describes a procedure to freeze muscle tissues by plunging them directly into liquid nitrogen. This protocol also highlights a new cryovial that can avoid the "blanket effect" of nitrogen gas when liquid nitrogen contacts the tissue surface of a specimen.
01:49
The Nitrogen Cycle
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2019
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
07:37
Revealing Dynamic Processes of Materials in Liquids Using Liquid Cell Transmission Electron Microscopy
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Cited by 9 •
2012
We have developed a self-contained liquid cell, which allows imaging through liquids using a transmission electron microscope. Dynamic processes of nanoparticles in liquids can be revealed in real time with sub-nanometer resolution.
FAQs
Rapid heat removal sharply lowers the temperature of a biological sample, slowing enzymatic activity and other biochemical reactions. This matters because ongoing reactions can contribute to molecular degradation after collection. By reducing that activity quickly, processing helps preserve DNA and RNA in a condition suitable for later extraction and analysis, particularly when maintaining the original molecular state is important.
Freezing can protect biological material, but ice formation may damage cells or compromise sample quality. Careful handling limits unnecessary physical stress, while controlled thawing helps reduce damage as the material returns to usable conditions. These steps are therefore part of preservation rather than separate details, because poor handling or thawing can undermine the molecular integrity gained through rapid cooling.
The approach can be applied to DNA, RNA, cells, tissues, and other biological samples used in genetics. Its value differs by material: nucleic acids require protection from degradation, whereas cells and tissues may need preservation that supports later molecular recovery. Maintaining these sample types expands their usefulness for extraction, storage, genotyping, sequencing, and related genetic investigations.
By rapidly reducing temperature and suppressing enzymatic and biochemical activity, liquid nitrogen processing helps limit degradation before analysis begins. Preserving the sample in this state can improve its suitability for nucleic acid extraction and subsequent workflows. The resulting material may support analyses that depend on retaining the genetic information present in the original specimen.
A supported workflow includes rapidly cooling or freezing the biological material, maintaining it under the extremely cold conditions used for preservation, handling it carefully, and applying controlled thawing when the sample is needed. The exact sequence depends on whether the goal is preparation, storage, or later extraction, but each stage focuses on limiting degradation and damage.
This approach is useful when researchers need to preserve biological specimens for later genetic work rather than analyze them immediately. It supports sample preparation and storage for DNA or RNA extraction, as well as preservation of cells and tissues. In broader research programs, it contributes to genotyping, sequencing, biobanking, and long-term genetic studies.