Increasing stratification decreases the availability of phytoplankton nutrients such as nitrate, phosphate and silicic acid, and could lead to a decrease in primary production and, thus, marine snow.
22.
The possible products include SiH 4 and / or higher molecules in the homologous series Si n H 2n + 2, a polymeric silicon hydride, or a silicic acid.
23.
Deep waters are rich in nutrients, including nitrate, phosphate and silicic acid, themselves the result of decomposition of sinking organic matter ( dead / detrital plankton ) from surface waters.
24.
Following the same principle, the fabrication of low-pH cement also implies the addition of finely divided pozzolanic materials rich in silicic acid to the concrete mix to decrease its alkalinity.
25.
The human blood plasma contains monomeric silicic acid at levels of less than 1 mg Si / l, corresponding to the average dietary intake of 20 50 mg / day.
26.
He spent a one-year sabbatical at the University of Swansea studying the effects of polysilicates on mammalian cells, and published papers on the uptake of silicic acid by rat liver mitochondria.
27.
The group of algae known as the diatoms synthesize their cell walls ( also known as frustules or valves ) from silicic acid ( specifically orthosilicic acid, H 4 SiO 4 ).
28.
Diatom cell walls are bivalve, i . e . made up of two halves, and are made up of biogenic silica; silica synthesised in the diatom cell by the polymerisation of silicic acid.
29.
It is much more important to the metabolism of plants, particularly many grasses, and silicic acid ( a type of silica ) forms the basis of the striking array of protective shells of the microscopic diatoms.
30.
In the calcium silicate aggregate, as silicic acid species are absorbed onto the metal surface, the development of silica layers ( mono-and bi-layers ) lead to the formation of colloidal complexes with neutral or negative surface charges.
