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Ricinus communis, the castor bean [1] or castor oil plant, [2] is a species of perennial flowering plant in the spurge family, Euphorbiaceae. It is the sole species in the monotypic genus, Ricinus, and subtribe, Ricininae. The evolution of castor and its relation to other species are currently being studied using modern genetic tools. [3]
Euphorbiaceae, the spurge family, is a large family of flowering plants (anthophytes) in the order Malpighiales.In common English, they are sometimes called euphorbias, [1] which is also the name of a genus in the family.
Ricin (/ ˈ r aɪ s ɪ n / RY-sin) is a lectin (a carbohydrate-binding protein) and a highly potent toxin produced in the seeds of the castor oil plant, Ricinus communis. The median lethal dose (LD 50) of ricin for mice is around 22 micrograms per kilogram of body weight via intraperitoneal injection. Oral exposure to ricin is far less toxic.
Castor oil is a vegetable oil pressed from castor beans, the seeds of the plant Ricinus communis. [1] The seeds are 40 to 60 percent oil. [2] It is a colourless or pale yellow liquid with a distinct taste and odor. Its boiling point is 313 °C (595 °F) and its density is 0.961 g/cm 3. [3]
Ricinus communis L. Sapium sebiferum Roxb. Faboideae (Legume family) ... Pyrus communis L. Rubiaceae (Madder, bedstraw, coffee family) Alibertia sessilis K.Schum.
The genus Ricinus (65 species) parasitize small or medium-sized Passeriformes. [ 6 ] [ 7 ] (Note that Ricinus is also a valid genus name in plant taxonomy.) The genus Trochiliphagus (13 species) is very similar to the former one, considered to be identical with that by some authors, [ 8 ] but infest hummingbirds .
Vulnerable (VU) species are considered to be facing a high risk of extinction in the wild. As of September 2016, the International Union for Conservation of Nature (IUCN) lists 5430 Vulnerable (VU) plant species.
Peter Hermann Stillmark (22 July 1860, Penza, Russian Empire – 23 June 1923, Pärnu, Estonia) was a Baltic-German microbiologist.. In 1888 at the University in Dorpat, now Tartu in Estonia under Professor Rudolf Kobert's supervision, he completed his doctoral thesis Über Ricin, ein giftiges Ferment aus den Samen von Ricinus comm. L. und einigen anderen Euphorbiaceen, which is a description ...
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