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...

cell wall made of silica (hydrated silicon dioxide), called a frustule. These frustules produce structural coloration, prompting them to be described...

-2). Their frustules remain undissolved because they are surrounded by an organic matrix. Clay minerals may also precipitate on the frustules and protect...

blastoids), the correct word is "theca". For diatoms, the term in use is "frustule", and for radiolarians it should be "capsule". The more common word "shell"...

known as diatoms construct their exoskeletons ("frustules") from silica extracted from seawater. The frustules of dead diatoms are a major constituent of deep...

groups of diatoms it refers to microscopically punctured regions of the frustule, or outer layer. In certain groups of spider species, so-called cribellate...

Silicates (glass) are common in marine biominerals, where diatoms form frustules and radiolaria form capsules from hydrated amorphous silica (opal). The...

known as frustules or valves) from silicic acid. Significantly, relative to the organic cell walls produced by other groups, silica frustules require less...

Like other diatoms, Gyrosigma has a siliceous cell wall called a frustule. The frustule is composed of two sections called valves, with one valve fitting...

protective silica (glass) shells called frustules. The beautifully engineered and intricate structure of many of these frustules is such that they are often referred...