Photon Absorbing Center
Photon Absorbing Center - Related Videos
07:51
Gas Absorber
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2023
Source: Michael G. Benton and Kerry M. Dooley, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Gas absorbers are used to remove contaminants from gas streams. Multiple designs are used to accomplish this objective1. A packed bed column uses gas and liquid streams running counter to each other in a column packed with loose packing materials, such as ceramics, metals, and plastics, or structured packing1. The packed bed uses surface area created by the packing to...
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Cited by 6 •
2012
This protocol outlines the simulation, fabrication and characterization of THz metamaterial absorbers. Such absorbers, when coupled with an appropriate sensor, have applications in THz imaging and spectroscopy.
08:24
Multi-Photon Laser Ablation of Cytoplasmic Microtubule Organizing Centers in Mouse Oocytes
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Cited by 2 •
2022
An optimized protocol is presented that enables the depletion of cytoplasmic microtubule organizing centers in mouse oocytes during metaphase I using a near-infrared femtosecond laser.
13:02
Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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Cited by 3 •
2017
We present a protocol for fabricating 1-D photonic crystal cavities on subwavelength diameter silica fibers (optical nanofibers) using femtosecond laser-induced ablation.
10:07
Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers
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2014
High-resolution intravital imaging with enhanced contrast up to 120 µm depth in lymph nodes of adult mice is achieved by spatially modulating the excitation pattern of a multi-focal two-photon microscope. In 100 µm depth we measured resolutions of 487 nm (lateral) and 551 nm (axial), thus circumventing scattering and diffraction limits.
FAQs
The chromophore sets the wavelengths at which the site can absorb light because its electrons respond to particular photon energies. Absorption promotes those electrons into an excited state, creating the energetic starting point for later energy or electron transfer. Examining wavelength-dependent absorption therefore helps relate a center's molecular composition to its photochemical activity.
Once the chromophore absorbs a photon, its excited-state energy can be transferred through the biological system or used to promote electron transfer. In photosynthetic organisms, this process directs captured light toward reaction centers, where charge separation supports the production of chemical energy. The excited state therefore links initial light capture with downstream cellular chemistry.
Energy transfer moves excitation from one molecular site to another, whereas electron transfer changes the distribution of electrons and can initiate photochemical reactions. Photon-absorbing centers may support either route, depending on the biological system and its downstream requirements. This distinction helps explain how light capture can contribute to photosynthetic charge separation or to other cellular responses.
In photosynthetic organisms, captured light is funneled toward reaction centers and contributes to charge separation and chemical energy production. Related structures in visual photoreceptor systems instead convert light into cellular signals. Both rely on chromophore excitation, but their biological outcomes differ: one supports energy-producing photochemistry, while the other initiates sensory information processing.
Studying its response can connect molecular light absorption with biological outcomes such as energy production or cellular signaling. Researchers can examine which wavelengths are captured, whether excitation leads to energy or electron transfer, and how the response relates to a reaction center or photoreceptor pathway. These observations support work in photosynthesis and sensory biology.
These molecular sites are relevant to photosynthesis, sensory biology, bioenergy, and light-controlled biological processes. In photosynthetic systems, they help explain how light energy reaches reaction centers and supports chemical energy production. In photoreceptor systems, they provide context for understanding how light becomes a cellular signal, making them useful across both energy and signaling research.