photoreductionn.
/ˌfəʊtə(ʊ)rᵻˈdʌkʃn/, U.S. /ˈˌfoʊdoʊrəˈdəkʃ(ə)n/, /ˈˌfoʊdoʊriˈdəkʃ(ə)n/ 1. Chemical reduction effected by light; esp. a photochemical process in plant cells and microorganisms in which carbon dioxide is reduced and water is formed (rather than oxygen, as in ordinary photosynthesis).
ΘΚΠ
the world > plants > by nutrition or respiration > [noun] > photosynthesis > photoreduction
photoreduction1888
the world > matter > physics > electromagnetic radiation > light > scientific effects of light > [noun] > study of chemical action of light > reduction
photoreduction1888
1888 R. Meldola Chem. of Photogr. (1889) 24 Photo-reduction may mean either a liberation of oxygen or of some other negative element, such as chlorine.
1907 Proc. Royal Soc. 1906–7 A. 78 468 An increase per grain of the photo-reduction product would not accelerate development, whilst if the bromine released were mechanically retained in the film it would oxidise the developer.
1939 Jrnl. Cellular & Compar. Physiol. 13 333 For the photo-reduction of one mole of carbon dioxide in the photosynthetic purple bacteria Streptococcus varians at high light intensity 2·6 moles of gaseous hydrogen are used.
1957 Jrnl. Amer. Chem. Soc. 79 294/1 Acriflavine and fluorescein-type dyes in solution undergo photoreduction in the presence of mild reducing agents.
1970 C. A. Price Molecular Approaches to Plant Physiol. ii. 115 A number of algae show ‘photoreduction’,..in which no O2 is evolved.
2002 Crop Sci. (Nexis) 1 Mar. 466 Activity of SOD was determined by measuring its ability to inhibit the photoreduction of nitro blue tetrazolium.
2. Photographic reduction in size.
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society > leisure > the arts > visual arts > photography > photographic processes > [noun] > enlargement or reduction in size
enlargement1866
reduction1871
megatypy1902
photoreduction1967
1967 N. S. M. Cox & M. W. Grose Organization Bibliogr. Rec. by Computer iv. 95 This latter version is printed..on 17″ × 22″ pages, suitable for 50% photoreduction and subsequent publication by offset press.
1972 Sci. Amer. Dec. 15/1 All the equipment for integrated-circuit work, including the photoreduction microscope and the ultrasonic bonder, was of Chinese manufacture.
1990 New Yorker 5 Feb. 5/1 (advt.) Through photoreduction, the original 13-volume set [of the Oxford English Dictionary] has been reproduced in this two-volume Compact Edition. A Bausch & Lomb magnifying glass is included.
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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n.1888