Koeppe nodules - significado y definición. Qué es Koeppe nodules
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Qué (quién) es Koeppe nodules - definición

ROCK CONCRETION ON THE SEA BOTTOM MADE OF LAYERS OF IRON/MANGANESE HYDROXIDES
Manganese nodules; Polymetallic nodule; Polymetallic nodules
  • Polymetallic nodules
  • Nodules on the seabed
  • Manganese nodules from the South Pacific Ocean
  • Manganese nodule

Manganese nodule         
Polymetallic nodules, also called manganese nodules, are mineral concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. As nodules can be found in vast quantities, and contain valuable metals, deposits have been identified as a potential economic interest.
Koeppe's nodules         
NODULES SEEN AT THE INNER MARGIN OF THE IRIS IN PATIENTS WITH GRANULOMATOUS ANTERIOR UVEITIS
Koeppe nodule; Köppe nodule
Koeppe's nodules are small nodules seen at the inner margin of the iris in patients with granulomatous anterior uveitis, which occurs in conditions such as sarcoidosis and tuberculosis.Neil T.
root nodule         
  • Nitrogen-fixing nodules on a clover root.
  • Nitrogen is the most commonly limiting nutrient in plants. Legumes use nitrogen fixing bacteria, specifically symbiotic rhizobia bacteria, within their root nodules to counter the limitation. Rhizobia bacteria convert nitrogen gas (N<sub>2</sub>) to [[ammonia]] (NH<sub>3</sub>) in a process called [[nitrogen fixation]]. Ammonia is then assimilated into [[nucleotide]]s, [[amino acid]]s, [[vitamin]]s and [[flavone]]s which are essential to the growth of the plant. The plant root cells convert sugar into organic acids which then supply to the rhizobia in exchange, hence a symbiotic relationship between rhizobia and the legumes.
PLANT PART
Root nodules; Nodulate; Nitrogen-fixing nodules; Root Nodules; Root Nodule; Nodulation; Root hair curling; User:Alyr249/sandbox; Legume Root Hair Curling; Determinate nodule; Indeterminate nodule; Nodule (legume)
¦ noun see nodule (sense 1).

Wikipedia

Manganese nodule

Polymetallic nodules, also called manganese nodules, are mineral concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. As nodules can be found in vast quantities, and contain valuable metals, deposits have been identified as a potential economic interest.

Nodules vary in size from tiny particles visible only under a microscope to large pellets more than 20 centimetres (8 in) across. However, most nodules are between 3 and 10 cm (1 and 4 in) in diameter, about the size of hen's eggs or potatoes. Their surface textures vary from smooth to rough. They frequently have botryoidal (mammillated or knobby) texture and vary from spherical in shape to typically oblate, sometimes prolate, or are otherwise irregular. The bottom surface, buried in sediment, is generally rougher than the top due to a different type of growth.