polysulphide

(redirected from polysulphides)

polysulphide

(ˌpɒlɪˈsʌlfaɪd) or

polysulfide

n
(Elements & Compounds) any sulphide of a metal containing divalent anions in which there are chains of sulphur atoms, as in the polysulphides of sodium, Na2S2, Na2S3, Na2S4, etc
References in periodicals archive ?
existing alkaline leaching technology include nil to low sodium sulphide addition, low polysulphides, low sulphate bleed, and low gold dissolution from the concentrate.
Some of technological aspects, like development of host matrices, interactions of host matrix with polysulphides and interactions between sulphur and electrolyte have been successfully developed within Eurolis project.
The core components of its products are high-performance polysulphides and fast-curing epoxy mortars.
Commonly window manufacturers use butyls as primary sealants, and polysulphides, polyurethanes and silicones as secondary sealants.
Although they were able to demonstrate qualities of radiopacity equal to that of the polysulphides, there were associated physical property drawbacks including hydrogen bubble formation in dies poured from the impressions, and evidence of long term breakdown limiting the shelf life.
In fact, according to Watson & Cruz-Rivera (2003), algae may contain a wide range of bactericidal agents, including amino acids, terpenoids, phlorotannins, acrylic acid, phenolic compounds, steroids, haloge-nated ketones, alkanes, cyclic polysulphides and fatty acids.
The forms of sulphur believed to be reducible under test conditions are (1) sulphide (released by the acid, not actually reduced), (2) elemental sulphur, (3) thiosulphate, (4) other polythionates or polysulphides and (5) sulphite, sulphate are excluded.
No zerovalent sulphur, such as polysulphides and/or elemental sulphur, was reported.
Initial trials were conducted with the following herbals: ginger, kalajeera, Asafoetida (Hing) and garlic rich in polysulphides and/or selenium), katha with polyphenols, and alkaloids of Vayuvidanga (Embelia ribes) and Chitramoolam (Plumbago zeylanica) and Tankanam (Borax).
Poorly defined CSUT(1) High 9-10 Complex Alkaline polysulphides High 8-9 Poorly defined Biocatalysed bisulphide Poorly defined 8-10(?
Benzoflex 400 polypropylene glycol dibenzoate used in flexible PVC, acrylics, nitrite rubber, polysulphides and polyvinyl acetate.