Ethylene Vinyl Acetate
Ethylene Vinyl Acetate - Related Videos
04:20
Investigating the Bacterial Response to Ethylene Using an Ethylene-Releasing Compound
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2025
Source: Augimeri, R. V. et. al., Utilizing the Ethylene-releasing Compound, 2-Chloroethylphosphonic Acid, as a Tool to Study Ethylene Response in Bacteria. J. Vis. Exp. (2016)This video demonstrates the effect of ethylene generated by 2-chloroethylphosphonic acid (CEPA) on bacterial growth and cellulose production. Ethylene activates signaling pathways that stimulate cellulose synthesis, resulting in enhanced pellicle formation. These results highlight the bacterial response to ethylene.
08:51
Utilizing the Ethylene-releasing Compound, 2-Chloroethylphosphonic Acid, as a Tool to Study Ethylene Response in Bacteria
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Cited by 1 •
2016
The protocols outlined herein facilitate the convenient investigation of bacterial ethylene responses by utilizing 2-chloroethylphosphonic acid (CEPA). Ethylene is produced in situ through the decomposition of CEPA in an aqueous bacterial growth medium, circumventing the requirement for pure ethylene gas.
05:51
Direct Detection of the Acetate-forming Activity of the Enzyme Acetate Kinase
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Cited by 11 •
2011
A method for the determination of acetate kinase activity is described. This assay utilizes a direct reaction for determining enzyme activity and kinetics of acetate kinase in the acetate-forming direction with different phosphoryl acceptors. Furthermore, this method can be utilized for assaying other acetyl phosphate or acetyl-CoA utilizing enzymes.
08:56
Catalytic Reactor: Hydrogenation of Ethylene
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA The hydrogenation of ethylene (C2H4) to ethane (C2H6) has often been studied as a model reduction reaction in characterizing new metal catalysts.1-2 While supported nickel is not the most active metal catalyst for this reaction, it is active enough that reaction can take place at < 200°C. The reaction typically involves adsorbed, dissociated hydrogen (H2) reacting...
08:15
Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
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Cited by 1 •
2017
Presented here is a protocol for the operation of a micro-scale temperature-programmed reactor for evaluating the catalytic performance of molybdenum carbide during acetic acid deoxygenation.
FAQs
Vinyl acetate content modifies the organization of the ethylene-based polymer phase by disrupting polyethylene crystallinity. As its proportion increases, the material generally becomes softer, while its permeability and elasticity also change. This compositional relationship allows researchers to adjust mechanical behavior and transport characteristics for different clinical roles rather than relying on a single fixed material profile.
Crystallinity affects how readily molecules move through the polymer matrix. Because vinyl acetate disrupts polyethylene crystallinity, changing its content can alter permeability and therefore influence the movement of a drug through the material. This relationship makes composition an important design variable when researchers seek to tailor release rates in diffusion-controlled delivery systems.
Flexibility, durability, processability, chemical resistance, permeability, and elasticity can all influence suitability, but improving one characteristic may change another. A softer formulation may behave differently from a more crystalline one, for example. Researchers therefore match composition and expected behavior to the device function, whether that function requires mechanical resilience, controlled transport, or practical fabrication.
They begin by relating vinyl acetate content to the required material behavior, then consider how the resulting crystallinity, flexibility, elasticity, permeability, and durability fit the intended use. For a drug-delivery matrix, release characteristics receive particular attention; for tubing or protective films, mechanical and chemical performance may be more important. This composition-property approach supports purposeful material selection.
Clinical uses include medical tubing, device components, protective films, and selected implantable systems. These applications benefit from combinations of flexibility, durability, and processability, although the relevant performance priorities differ by design. Tubing and device components may require dependable mechanical behavior, while protective or implantable systems may also depend on suitable chemical resistance and permeability.
A researcher would focus on EVA as a drug-delivery matrix when the desired function is controlled molecular transport and an adjustable release rate. The same material family can instead serve as tubing or a device component when flexibility, durability, and processability are the main requirements. Its clinical value comes from relating composition and behavior to the intended function.