Ethylene Loss
Ethylene Loss - 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.
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...
01:10
Line Loss
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2024
The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss. Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...
12:27
Piping Networks and Pressure Losses
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2023
Source: Alexander S Rattner, Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA This experiment introduces the measurement and modeling of pressure losses in piping networks and internal flow systems. In such systems, frictional flow resistance from channel walls, fittings, and obstructions causes mechanical energy in the form of fluid pressure to be converted to heat. Engineering analyses are needed to size flow hardware to ensure...
FAQs
The outcome depends on both the molecular framework and the reaction environment. A framework can make bond cleavage, rearrangement, or ligand dissociation more accessible, while environmental conditions can favor one pathway over another. Examining these influences helps chemists connect an observed ethylene loss event with the structural changes occurring in a reaction intermediate or coordination complex.
Ethylene loss can arise through three chemically distinct events: bond cleavage removes the fragment from a structure, rearrangement changes connectivity before release, and dissociation separates an ethylene ligand from a coordination complex. Distinguishing these possibilities matters because the same net fragment loss can reflect different molecular transformations.
In mass spectrometry, a neutral C₂H₄ loss appears as a change in the mass of the detected ion rather than as a separately observed charged fragment. That mass change provides evidence for an ethylene-containing structural feature or fragmentation route. Interpreting it alongside the molecular framework can help assign how the ion fragmented.
A characteristic mass change can help researchers compare proposed structural assignments and fragmentation pathways. If the observed ion mass is consistent with removal of neutral C₂H₄, the result supports a pathway containing an ethylene-related structural feature. This evidence is useful for linking measured ion behavior to chemical transformations within the original molecule.
Researchers monitor the process in mass spectrometry by examining the mass of the detected ion and determining whether it reflects removal of a neutral C₂H₄ fragment. The measured change is then considered together with the proposed molecular structure. This workflow helps identify structural features and evaluate plausible fragmentation pathways.
In synthetic and organometallic chemistry, monitoring ethylene loss can clarify reaction mechanisms, ligand behavior, and the stability of catalytic intermediates. Evidence for release or dissociation can show how a coordination complex changes during a reaction. These observations help relate an intermediate's composition to its role in the broader chemical transformation.