• Thumbnail for Frustule
    A frustule is the hard and porous cell wall or external layer of diatoms. The frustule is composed almost purely of silica, made from silicic acid, and...
    8 KB (943 words) - 19:49, 4 October 2023
  • Thumbnail for Diatom
    cell wall made of silica (hydrated silicon dioxide), called a frustule. These frustules produce structural coloration, prompting them to be described...
    148 KB (15,286 words) - 01:00, 24 July 2024
  • Thumbnail for Test (biology)
    blastoids), the correct word is "theca". For diatomea, the term in use is "frustule", and for radiolarians it should be "capsule". The more common word "shell"...
    6 KB (656 words) - 13:28, 30 September 2023
  • Thumbnail for Diatomaceous earth
    -2). Their frustules remain undissolved because they are surrounded by an organic matrix. Clay minerals may also precipitate on the frustules and protect...
    40 KB (4,357 words) - 01:45, 9 August 2024
  • Thumbnail for Silicate mineral
    known as diatoms construct their exoskeletons ("frustules") from silica extracted from seawater. The frustules of dead diatoms are a major constituent of deep...
    20 KB (1,897 words) - 18:21, 16 July 2024
  • Thumbnail for Cribellum
    groups of diatoms it refers to microscopically punctured regions of the frustule, or outer layer. In certain groups of spider species, so-called cribellate...
    8 KB (931 words) - 15:34, 28 December 2023
  • Thumbnail for Cell wall
    known as frustules or valves) from silicic acid. Significantly, relative to the organic cell walls produced by other groups, silica frustules require less...
    43 KB (4,780 words) - 15:37, 19 August 2024
  • Thumbnail for Silicon
    protein (SIT) to be predominantly used in the cell wall structure as frustules. Silicon enters the ocean in a dissolved form such as silicic acid or...
    86 KB (10,640 words) - 12:04, 13 August 2024
  • Thumbnail for Black Sea
    the limited availability of silicon, a necessary constituent of diatom frustules. As a consequence of these blooms, benthic macrophyte populations were...
    117 KB (11,740 words) - 19:41, 19 August 2024
  • Thumbnail for Biomineralization
    (glass) are common in marine biominerals, where diatoms and radiolaria form frustules from hydrated amorphous silica (opal). The major carbonate in biominerals...
    99 KB (10,362 words) - 10:37, 23 June 2024