Lyophilization Protocol
Lyophilization Protocol - Related Videos
11:14
Mass Spectrometric Approaches to Study Protein Structure and Interactions in Lyophilized Powders
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Cited by 19 •
2015
Here, we present detailed protocols for solid-state amide hydrogen/deuterium exchange mass spectrometry (ssHDX-MS) and solid-state photolytic labeling mass spectrometry (ssPL-MS) for proteins in solid powders. The methods provide high-resolution information on protein conformation and interactions in the amorphous solid-state, which may be useful in formulation design.
07:27
The Development of Lyophilized Loop-mediated Isothermal Amplification Reagents for the Detection of Coxiella burnetii
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Cited by 7 •
2016
We described here a simple loop-mediated isothermal amplification (LAMP) method using lyophilized reagents for the detection of C. burnetii in patient samples.
02:31
Extracellular Matrix-derived Foam Fabrication via Lyophilization: A Procedure to Generate Biological Scaffolds from ECM of Decellularized Tissues
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2023
This video describes the method for synthesizing pure ECM-derived foams without the need for chemical crosslinking. These ECM-derived foams find applications as advanced 3D in vitro cell culture models or as pro-regenerative bioscaffolds.
10:36
Gelatin Methacryloyl Granular Hydrogel Scaffolds: High-throughput Microgel Fabrication, Lyophilization, Chemical Assembly, and 3D Bioprinting
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Cited by 9 •
2022
This article describes protocols for high-throughput gelatin methacryloyl microgel fabrication using microfluidic devices, converting microgels to resuspendable powder (micro-aerogels), the chemical assembly of microgels to form granular hydrogel scaffolds, and developing granular hydrogel bioinks with preserved microporosity for 3D bioprinting.
07:12
Neutrophil Isolation Protocol
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Cited by 173 •
2008
Neutrophils are among the first cells to arrive on the site of inflammatory immune response, and their functions and mechanisms have been studied extensively in vitro. We demonstrate a standard density gradient separation method to isolate human neutrophils from whole blood using commercially available separation media.
FAQs
Freezing prepares the biological sample for controlled water removal and strongly influences whether its structure and activity remain intact. The protocol must establish a suitable frozen state before vacuum is applied, because later drying depends on that preparation. In biological research, careful freezing is therefore essential when processing proteins, enzymes, vaccines, diagnostic reagents, or other temperature-sensitive materials.
Primary drying removes ice by sublimation under reduced pressure, while secondary drying removes residual bound moisture through desorption. These stages address different forms of water and must be controlled separately. Completing both stages helps produce a sufficiently dry material without exposing it unnecessarily to conditions that could promote denaturation or structural damage.
Temperature, pressure, formulation, and drying time are the principal variables identified for controlling the process. Their combined settings affect water removal as well as preservation of biological structure and activity. Adjusting these conditions carefully helps limit denaturation and structural damage, which is particularly important when the dried product must remain functional after storage or transport.
A typical sequence begins by freezing the biological material, followed by primary drying under vacuum to remove ice through sublimation. Secondary drying then removes remaining bound moisture by desorption. The protocol must coordinate these stages with suitable temperature, pressure, formulation, and duration so that water is removed while the material retains its required stability and activity.
Researchers may choose this approach for temperature-sensitive materials that require longer storage or transport with less dependence on continuous refrigeration. Supported examples include proteins, enzymes, vaccines, diagnostic reagents, and other biological preparations. The expected benefit is improved shelf life while preserving structure, stability, and activity through controlled removal of water.
In biology, controlled freeze-drying can make sensitive materials easier to store and move while reducing reliance on continuous refrigeration. This is relevant when samples or reagents must retain functional properties over time. Its applications span research and diagnostic contexts, including preservation of proteins, enzymes, vaccines, and diagnostic reagents for later use.