photocholesterolAn analogue of cholesterol in which the 5-6 double bond has been replaced by a photoactivatable diazirine group
photochopTo convert, by chopping, a DC (or slowly varying AC) input signal into a higher frequency signal.
photochopperAn optoelectronic device that converts a DC input signal into a higher frequency signal.
photochromA colorized image produced from black-and-white photographic negatives via the direct photographic transfer of a negative onto lithographic printing plates.
photochromaticPertaining to or exhibiting photochromism.
photochromatographyA form of chromatography in which isotopically-labelled compounds may be separated by illumination at a wavelength that will excite any specific isotope
photochromicOf, related to, or produced by photochromism
photochromismThe reversible transformation of the optical properties of a material when exposed to electromagnetic radiation, especially the reversible darkening of a plastic lens when exposed to sunlight.
photochromogenA microorganism (especially a mycobacterium) whose pigmentation develops following exposure to light.
photochromoscopeA device for giving shifting effects of color to a photograph. The unmounted print, made translucent, is illuminated from behind with colored light.
photochromotypeA coloured print made by photomechanical means.
photochronographAn instrument for recording very short intervals of time. The record is made by the power of a magnetic field, due to an electric signaling current, to turn the plane of polarization of light. A flash, coinciding in time and duration with the signal, is thus produced and is photographed on a moving plate.
photoclinometerAny of several directional surveying instruments which record photographically the direction and magnitude of well deviations from the vertical.
photoclinometryThe estimation of slope information by the analysis of brightness distribution in a photograph of a geologic surface (such as a lunar crater)
photoconsistentIn computer vision, the property of a voxel that appears to be occupied by part of an object, since its colour appears similar to all cameras that can see it.
photoconsumptionThe consumption of a chemical species (typically molecular oxygen) under the influence of light
photocrayonA form of enlarged photographic portrait in which a wet-plate transparency on glass was backed with white paper, on which line work was done with crayon, pencil, and colour.
photocyclizationAny intramolecular photochemical process leading to a ring system by formation of one new single bond, either by a concerted process (e.g., electrocyclization) or by multi-step processes such as the Norrish-Yang reaction.
photocycloadditionAny intermolecular photochemical process leading to a ring systems by formation of two new single bonds
photocyclodehydrogenationA photochemical reaction where light causes a molecule to form a new ring structure and simultaneously lose hydrogen atoms, producing a more fused and aromatic compound. It is commonly used to synthesize polycyclic aromatic hydrocarbons such as phenanthrenes and helicenes.