All these vessels are also exposed to atmospheric corrosion inside the refineries, which means that the shells of the heat exchangers studied are exposed to both external corrosion and internal corrosion (usually ammonium bisulfide
SRB corrosion involves a number of chemical entities such as hydrogen sulfide and bisulfide
anions (resulting from the dissimilatory reduction of sulfate anions by bacteria) and metastable sulphur compounds like thiosulfate and polythionates.
The warmth of the decomposing organic matter was thought to attract the ants, which moved into the boxes where they were treated with an insecticide such as carbon bisulfide
. Another early method involved flooding orchards in order to force the ants into a concentrated area where they were treated with scalding water or kerosene (Newell & Barber 1913).
In contrast, under neutral to slightly alkaline pH (as implied by the presence of sericite and orthoclase) and oxidizing conditions, gold should be relatively insoluble as bisulfide
or chloride complexes.
The substance, carbon bisulfide
, is a chemical byproduct from the production of rayon.
In groundwater, sulfide can exist in three forms, hydrogen sulfide ([H.sub.2]S), bisulfide
(HS) and sulfide ([S.sup.2]).
It is also possible to produce half-cystine residues for disulfide cross-links by placing the half-cystine residues in the correct primary sequence, and then adjusting the length of the bisulfide
bond between these residues.