Sealed Vessel Technique
Sealed Vessel Technique - Related Videos
06:26
Achieving Moderate Pressures in Sealed Vessels Using Dry Ice As a Solid CO2 Source
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Cited by 11 •
2018
Here we present a protocol for performing reactions in simple reaction vessels under low-to-moderate pressures of CO2. The reactions can be performed in a variety of vessels simply by administering the carbon dioxide in the form of dry ice, without the need for costly or elaborate equipment or set-ups.
04:31
Assessing Vessel Perfusion via Angiography: A Technique to Introduce Contrast Agent in Descending Aorta to Visualize Blood Vessel Perfusion in Rabbit Model
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2025
This video describes the technique for performing angiography by injecting a contrast agent into the descending aorta to visualize blood vessel perfusion in a rabbit model. This technique helps to understand the perfusion in blood vessels with blockages and after treatment during recovery.
04:41
Optimized Sealing Process and Real-Time Monitoring of Glass-to-Metal Seal Structures
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Cited by 7 •
2019
Key procedures to optimize the sealing process and achieve real-time monitoring of the metal-to-glass seal (MTGS) structure are described in detail. The embedded fiber Bragg grating (FBG) sensor is designed to achieve online monitoring of temperature and high-level residual stress in the MTGS with simultaneous environmental pressure monitoring.
05:56
Operation of High-pressure Reactor Vessels
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2023
Robert M Rioux, Pennsylvania State University, University Park, PA The use of gases in a synthetic chemistry laboratory is essential for carrying out a variety of highly facile and atom economical transformations. Reactions such as hydrogenation, oxidation, and amination require the use of gases like hydrogen, oxygen, and ammonia. Due to the poor solubility of these gases in typical reactant solutions, high pressures are necessary to achieve a meaningful reaction rate. Not only are these gases...
07:32
Purification of Mouse Brain Vessels
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Cited by 90 •
2015
We describe a protocol allowing the purification of the mouse brain's vascular compartment. Isolated brain vessels include endothelial cells linked by tight junctions and surrounded by a continuous basal lamina, pericytes, vascular smooth muscle cells, as well as perivascular astroglial membranes.
FAQs
Heating a closed reaction system causes solvent and reagent vapors to remain confined rather than escape. As vapor accumulates, pressure can change, while the retained materials keep the reaction composition closer to the intended formulation. These linked changes allow chemists to study or carry out transformations under conditions that differ from those in an open container.
Vapor retention limits evaporation, so volatile solvents and reagents remain available within the reaction environment. This helps preserve the intended proportions of reactants and reduces changes caused by material escaping into the surroundings. Maintaining that composition is particularly relevant when the reaction depends on controlled heating or on the presence of gases and other volatile components.
An open system can lose volatile material to the outside atmosphere, changing its composition during heating or reaction. In contrast, a sealed vessel retains solvent and reagent vapors, allowing pressure and composition to evolve within the container. This difference can improve reproducibility and make certain transformations feasible when evaporation would interfere with the desired conditions.
A general workflow begins by placing the selected reactants and volatile components in a container that can enclose the reaction environment. The vessel is then closed before the reaction is heated or otherwise conditioned. The transformation proceeds with vapors retained inside, so the reaction experiences the changing pressure and composition associated with the enclosed system.
This approach is useful when a reaction uses volatile solvents or gases, requires controlled heating, or depends on maintaining a defined composition. It is also valuable for transformations that may be difficult in an open system because evaporation changes the available materials. The technique therefore supports controlled reaction environments and more reproducible experimental conditions.
The method enables chemists to work with a reaction environment in which pressure and composition change as the system is heated or conditioned. It can support transformations that are difficult to perform openly and help produce more reproducible results. In chemistry research, its relevance lies in controlling volatile components while keeping the reaction environment defined.