Total Electron Yield
Total Electron Yield - Related Videos
01:31
ATP Yield
0 Views •
2019
Cellular respiration produces 30 - 32 ATP per glucose molecule. Although most of the ATP results from oxidative phosphorylation and the electron transport chain (ETC), 4 ATP are gained beforehand (2 from glycolysis and 2 from the citric acid cycle). The ETC is embedded in the inner mitochondrial membrane and is comprised of four main protein complexes and an ATP synthase. NADH and FADH2 pass electrons to these complexes, which pump protons into the intermembrane space. This distribution of...
02:22
Reaction Yield
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2020
The theoretical yield of a reaction is the amount of product estimated to form based on the stoichiometry of the balanced chemical equation. The theoretical yield assumes the complete conversion of the limiting reactant into the desired product. The amount of product that is obtained by performing the reaction is called the actual yield, and it may be less than or (very rarely) equal to the theoretical yield. Percent Yield In the case of chemical reactions, the actual yield of the product is...
11:42
Measurement of Total Calcium in Neurons by Electron Probe X-ray Microanalysis
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Cited by 7 •
2013
This paper describes the application of cryoanalytical electron microscopy to the quantitative measurement of total calcium content and distribution at subcellular resolution in physiologically defined biological specimens.
01:24
Bond Yields and the Yield Curve: Putting It All Together
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2026
Bond yields and the yield curve are fundamental components of fixed-income markets, influencing investment decisions, economic policies, and financial conditions. Bond yields reflect the annual return an investor can expect from holding a bond until maturity. Prevailing interest rates, bond prices, and credit risk influence these yields. Since bond prices and yields move inversely, a rise in bond prices results in lower yields, while a decline in bond prices leads to higher yields.The yield...
01:28
Total Fixed, Total Variable, and Total Cost Curves
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2024
In the short run, a firm incurs various fixed expenses such as lease payments, insurance premiums, and machinery depreciation. Collectively, these are known as the total fixed cost (TFC) of production. Graphically, TFC is depicted by a straight line parallel to the x-axis, with cost on the vertical axis and the quantity of output on the horizontal axis. Variable costs include expenses that change with the output level, such as materials used and wages of workers paid hourly. Collectively, these...
FAQs
The detected current is dominated by electrons that escape from the region close to the material surface. Photon absorption creates primary photoelectrons, and subsequent interactions produce secondary electrons, while relaxation may generate Auger electrons. Because the measured signal is tied to absorption near the surface, it can reveal chemistry that controls interfacial reactivity, especially in thin or surface-active materials.
Primary photoelectrons arise from the initial photon absorption, secondary electrons result from subsequent interactions, and relaxation processes can produce Auger electrons. Total Electron Yield records the resulting collected electron current rather than treating only one electron population as the response. Considering these contributions explains why the measured signal carries information about both photon absorption and near-surface electronic processes.
Varying the incident photon energy changes how strongly the material absorbs photons at different energies. Recording the emitted-electron current across that energy range produces an absorption-related response that can be examined for chemical and electronic structure. This energy-dependent measurement helps distinguish changes associated with elemental composition, oxidation states, bonding environments, or other near-surface electronic characteristics.
Interpretation links features in the energy-dependent yield to the material’s absorption behavior. In chemistry, those changes can be used to investigate which elements are present, their oxidation states, bonding environments, and electronic structure. Since the response is surface weighted, these conclusions describe chemically relevant near-surface regions rather than necessarily the bulk as a whole.
A measurement begins by exposing the sample to incident photons and collecting the electrons emitted after absorption. The collected electrons produce a current, which is recorded while the photon energy is varied. Plotting that current against photon energy creates the response used for chemical and electronic interpretation. This workflow connects the measured signal directly to energy-dependent absorption near the surface.
The method is particularly useful for thin films, catalysts, electrodes, and other materials whose surface chemistry controls reactivity. Its surface-sensitive response can examine chemically important regions without treating the sample as compositionally uniform throughout. This makes Total Electron Yield relevant when reactions, electronic behavior, or material performance depend strongly on the condition of the outer material region.
Catalyst and electrode performance can depend on surface composition, oxidation state, bonding, and electronic structure. Total Electron Yield provides a way to investigate these properties through the photon-energy-dependent electron current, with emphasis on near-surface absorption. The resulting information helps connect surface chemistry with reactivity and with the electronic characteristics that influence chemical processes at these materials.