quantasomen.

Brit.

/ˈkwɒntəsəʊm/, U.S.

/ˈkwɑn(t)əˌsoʊm/

Origin: Formed within English, by derivation. Etymons: lEnglish quanta , quantum n., -some comb. form.

Etymology: < quanta, plural of quantum n. + -some comb. form. The quantasome was believed to be the site of the photosynthetic unit, where ‘quantum conversion’ occurred.Quot. 1962 is the earliest of several such references to the word's coinage, all in papers by Professor R. B. Park and his colleagues.

Biology. Now historical.

Originally: any of numerous granular structures seen by electron microscopy in association with the grana of chloroplasts, hypothesized to be photosynthetic units. Later: a photoreceptor unit of a purple bacterium.

ΘΚΠ

the world > life > biology > substance > cell > cell organelle or contents > [noun] > plastids or aggregate of > chromosomes: parts of

stroma1914

quantasome1962

thylakoid1962

1962 M. Calvin in Science 16 Mar. 889/1 Here we can see the lamellae on its flat side showing a granular structure, made up of fairly uniform oblate spheroids which we have called quantasomes.

1976 J. Coombs & A. D. Greenwood in J. Barber Intact Chloroplast i. 12 The concept of a quantasome as the structural counterpart of a functional photosynthetic unit in the full classical sense of this term is in doubt.

1985 Biochimica et Biophysica Acta 809 271 A quantasome (photoreceptor unit) is made of a reaction centre surrounded by a ring of antenna complexes.

1994 Photosynthetica 30 161 The quantasomes were regarded as the main integral parts of the grana lamellae in the protein lipid layers. Yet it soon became clear that a morphological unit such as the quantasomes did not exist.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	quantasome
释义	quantasomen. Brit. /ˈkwɒntəsəʊm/, U.S. /ˈkwɑn(t)əˌsoʊm/ Origin: Formed within English, by derivation. Etymons: lEnglish quanta , quantum n., -some comb. form. Etymology: < quanta, plural of quantum n. + -some comb. form. The quantasome was believed to be the site of the photosynthetic unit, where ‘quantum conversion’ occurred.Quot. 1962 is the earliest of several such references to the word's coinage, all in papers by Professor R. B. Park and his colleagues. Biology. Now historical. Originally: any of numerous granular structures seen by electron microscopy in association with the grana of chloroplasts, hypothesized to be photosynthetic units. Later: a photoreceptor unit of a purple bacterium. ΘΚΠ the world > life > biology > substance > cell > cell organelle or contents > [noun] > plastids or aggregate of > chromosomes: parts of stroma1914 quantasome1962 thylakoid1962 1962 M. Calvin in Science 16 Mar. 889/1 Here we can see the lamellae on its flat side showing a granular structure, made up of fairly uniform oblate spheroids which we have called quantasomes. 1976 J. Coombs & A. D. Greenwood in J. Barber Intact Chloroplast i. 12 The concept of a quantasome as the structural counterpart of a functional photosynthetic unit in the full classical sense of this term is in doubt. 1985 Biochimica et Biophysica Acta 809 271 A quantasome (photoreceptor unit) is made of a reaction centre surrounded by a ring of antenna complexes. 1994 Photosynthetica 30 161 The quantasomes were regarded as the main integral parts of the grana lamellae in the protein lipid layers. Yet it soon became clear that a morphological unit such as the quantasomes did not exist. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.1962
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