Energy Transfer Efficiency
Energy Transfer Efficiency - Related Videos
06:39
Förster Resonance Energy Transfer (FRET)
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2023
Förster resonance energy transfer (FRET) is a phenomenon used to investigate close-range biochemical interactions. In FRET, a donor photoluminescent molecule can non-radiatively transfer energy to an acceptor molecule if their respective emission and absorbance spectra overlap. The amount of energy transferred—and consequently the overall emission of sample—depends on the proximity of an acceptor-donor pair of photoluminescent molecules. FRET analysis is combined with other biochemistry...
01:16
Energy Transfer in Chemical Reactions
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2023
Chemical reactions require sufficient energy to cause the matter to collide with enough precision and force that old chemical bonds can be broken and new ones formed. In general, kinetic energy is the form of energy powering any type of matter in motion. Imagine a person building a brick wall. The energy it takes to lift and place one brick on top of another is the kinetic energy—the energy matter possesses because of its motion. Once the wall is in place, it stores potential energy. Potential...
10:29
Applying Fluorescence Resonance Energy Transfer (FRET) to Examine Effector Translocation Efficiency by Coxiella burnetii during siRNA Silencing
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Cited by 15 •
2016
Investigating the interactions between bacterial pathogens and their hosts is an important area of biological research. Here, we describe the necessary techniques to measure effector translocation by Coxiella burnetii during siRNA gene silencing using BlaM substrate.
12:23
Real-time Monitoring of Ligand-receptor Interactions with Fluorescence Resonance Energy Transfer
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Cited by 6 •
2012
We demonstrate FRET between conjugated polymer polydiacetylene (PDA) and fluorophore attached to the surface of PDA liposomes for the sensing of biomolecules. PDA liposomes also contained receptor molecules on their surfaces for biomolecules to be used as probes. Ligand-receptor interactions lead to changes in the FRET efficiency between the fluorophore and PDA which is the basis of the sensing mechanism.
08:35
Testing the Heat Transfer Efficiency of a Finned-tube Heat Exchanger
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2023
Source: Michael G. Benton and Kerry M. Dooley, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Heat exchangers transfer heat from one fluid to another fluid. Multiple classes of heat exchangers exist to fill different needs. Some of the most common types are shell and tube exchangers and plate exchangers1. Shell and tube heat exchangers use a system of tubes through which fluid flows1. One set of tubes contains the liquid to be cooled or heated, while the second...
FAQs
At the molecular scale, energy can be redirected through collisions, bond breaking and formation, electron transfer, or absorption and emission of light. Each pathway determines how much input energy reaches the intended chemical outcome. Energy that does not follow the desired route may appear as heat or another dissipated form, lowering the measured efficiency of the process.
Dissipation matters because not all supplied energy contributes to the targeted chemical change. Heat and other forms of released energy represent portions that have left the useful pathway. Identifying this loss helps chemists distinguish whether a process is limited by how energy moves through the system or by the chemical outcome being pursued.
Chemists compare pathways by relating the total energy supplied to the energy associated with the desired result. Calorimetry can track thermal changes, reaction energetics can assess energy changes linked to chemical transformations, and photochemical measurements can examine light-related transfer. Using the appropriate measurement connects a pathway with its practical chemical performance.
Calorimetry, reaction energetics, and photochemical measurements provide complementary ways to evaluate energy use. Calorimetry examines heat-related changes, while reaction energetics addresses energy changes accompanying chemical processes. Photochemical measurements are suited to systems involving light absorption or emission. Together, these approaches allow input energy and useful chemical output to be compared quantitatively.
Photochemical measurements are relevant when energy enters or leaves a chemical system as light. They help assess how effectively absorbed or emitted light is connected with a useful chemical outcome rather than being lost through another pathway. This information supports the study of solar-energy conversion and helps evaluate materials designed to transfer light energy into chemical forms.
Efficiency measurements help researchers judge whether a catalyst directs more supplied energy toward the intended reaction outcome. They also provide a way to evaluate energy-storage materials by comparing energy input with useful chemical performance. These comparisons can guide improvements in catalysts, storage systems, and technologies that convert chemical, thermal, or solar energy.