All individuals in MeSH

Label Id Description
Photoaffinity Labels D019920 [Biologically active molecules which are covalently bound to the enzymes or binding proteins normally acting on them. Binding occurs due to activation of the label by ultraviolet light. These labels are used primarily to identify binding sites on proteins. ]
Photobacterium D010776 [A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria that are common in the marine environment and on the surfaces and in the intestinal contents of marine animals. Some species are bioluminescent and are found as symbionts in specialized luminous organs of fish. ]
Photobiology D018462 [The branch of biology dealing with the effect of light on organisms. ]
Photobioreactors D058433 [Devices for generating biological products that use light as the energy source. They are used for controlled BIOMASS production such as growing cyanobacteria, mosses, or algae. ]
Photobleaching D038761 [Light-induced change in a chromophore, resulting in the loss of its absorption of light of a particular wave length. The photon energy causes a conformational change in the photoreceptor proteins affecting PHOTOTRANSDUCTION. This occurs naturally in the retina (ADAPTATION, OCULAR) on long exposure to bright light. Photobleaching presents problems when occurring in PHOTODYNAMIC THERAPY, and in FLUORESCENCE MICROSCOPY. On the other hand, this phenomenon is exploited in the technique, FLUORESCENCE RECOVERY AFTER PHOTOBLEACHING, allowing measurement of the movements of proteins and LIPIDS in the CELL MEMBRANE. ]
Photochemical Processes D055668 [Chemical reactions effected by light. ]
Photochemistry D010777 [A branch of physical chemistry which studies chemical reactions, isomerization and physical behavior that may occur under the influence of visible and/or ultraviolet light. ]
Photochemotherapy D010778 [Therapy using oral or topical photosensitizing agents with subsequent exposure to light. ]
Photoelectron Spectroscopy D056951 [A form of photoelectron spectroscopy in which a sample is irradiated with a beam of ULTRAVIOLET RAYS and the energies of the resulting photoelectrons are analyzed. , The study of the energy of electrons ejected from matter by the photoelectric effect, i.e., as a direct result of absorption of energy from electromagnetic radiation. As the energies of the electrons are characteristic of a specific element, the measurement of the energy of these electrons is a technique used to determine the chemical composition of surfaces. , A form of photoelectron spectroscopy in which a sample is irradiated with a beam of monochromatic X-RAYS and the energies of the resulting photoelectrons are analyzed. ]
Photofluorography D010779 [The photography of images produced on a fluorescent screen by X-rays. ]
Photogrammetry D010780 [Making measurements by the use of stereoscopic photographs. ]
Photograph D059036 [Still image produced from radiation-sensitive materials (sensitive to light, electron beams, or nuclear radiation), generally by means of the chemical action of light on a sensitive film, paper, glass, or metal. Photographs may be positive or negative, opaque or transparent. ]
Photography D010781 [Method of making images on a sensitized surface by exposure to light or other radiant energy. ]
Photography, Dental D023861 [Photographic techniques used in ORTHODONTICS; DENTAL ESTHETICS; and patient education. ]
Photoinitiators, Dental D058567 [Chemical compound used to initiate polymerization of dental resins by the use of DENTAL CURING LIGHTS. It absorbs UV light and undergoes decomposition into free radicals that initiate polymerization process of the resins in the mix. Each photoinitiator has optimum emission spectrum and intensity for proper curing of dental materials. ]
Photolysis D010782 [Chemical bond cleavage reactions resulting from absorption of radiant energy. ]
Photometry D010783 [Measurement of the various properties of light. ]
Photomicrography D010784 [Photography of objects viewed under a microscope using ordinary photographic methods. ]
Photons D017785 [Discrete concentrations of energy, apparently massless elementary particles, that move at the speed of light. They are the unit or quantum of electromagnetic radiation. Photons are emitted when electrons move from one energy state to another. (From Hawley's Condensed Chemical Dictionary, 11th ed) ]
Photoperiod D017440 [The time period of daily exposure that an organism receives from daylight or artificial light. It is believed that photoperiodic responses may affect the control of energy balance and thermoregulation. ]