See Also: Calvin Benson cycle(medicine)
Calvin cycle(medicine)
Benson Hospital(health)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Calvin (as used in expressions)(encyclopedia)
Sandison, J Calvin(medicine)
Calvin, John(dictionary)
Calvin, Melvin(encyclopedia)
Calvin, John(encyclopedia)
Coolidge, (John) Calvin(encyclopedia)

Umbra (medicine) and Calvin Benson cycle (medicine)


Umbra (medicine)


umbra


Origin: L, a shadow.

1. <astronomy> The conical shadow projected from a planet or satellite, on the side opposite to the sun, within which a spectator could see no portion of the sun's disk; used in contradistinction from penumbra. See Penumbra. The central dark portion, or nucleus, of a sun spot.

The fainter part of a sun spot; now more commonly called penumbra.

2. <zoology> Any one of several species of sciaenoid Food fishes of the genus Umbrina, especially the Mediterranean species (U. Cirrhosa), which is highly esteemed as a market fish; called also ombre, and umbrine.

<botany> Umbra tree, a tree (Phytolacca diocia) of the same genus as pokeweed. It is native of South America, but is now grown in southern Europe. It has large dark leaves, and a somber aspect. The juice of its berries is used for colouring Wine.

Source: Websters Dictionary


Calvin Benson cycle (medicine)


Calvin Benson cycle
<biochemistry, plant biology> Metabolic pathway responsible for photosynthetic carbon dioxide fixation in plants and bacteria. The enzyme that fixes carbon dioxide is RuDP carboxylase. The cycle is the only photosynthetic pathway in C3 plants and the secondary pathway in C4 plants. The enzymes of the pathway are present in the stroma of the chloroplast.