Mollusks, arsenic

Gas-phase reactive intermediates low pressure, 46 107-113 supersonic jets, 46 113-121 Gastrointestinal absorption, lithium, 36 62-64 Gastropod mollusks, arsenic in, 44 150, 167, 168, 170 G bases, 45 268 Gd +... 

Molecular recognition, calmodulin, 46 447 Mollusks, arsenic in, 44 150, 167, 168, 170 Molten salts electrolysis, 31 11 oxygen activation, 44 328-329 Molybdate ions, tetrahedral, 39 194-195 Molybdenite, 17 108 Molybdenum, 45 1 acetylene complexes of, 4 104 alkoxides... 

Inorganic arsenic salts are also present in pesticides, herbicides, fungicides, paints, and tobacco plants. If transmitted to water, they accumulate in fish, mollusks, crustaceans, and algae (Johansen et ah, 2000). Transformed into organic salts, they reach the gastrointestinal tract via food and are delivered to liver, spleen, kidneys, and lungs. Arsenic is deposited in skin, nails, and hair. 

Tetramethylarsonium ion is a common arsenic species in marine animals. It is present usually as a minor constituent, although exceptions do occur for example, it is a significant arsenical in several species of bivalve mollusks (1). Traces of tetramethylarsonium ion have been found in some freshwater animals (6). It has also been reported in several fungal species, usually at low levels, and as a trace constiment of some terrestrial plants as well (6). There have been no reports of tetramethylarsonium ion in seawater or freshwater. 

Arsenic is abundant in seafood. Arsenobetaine is the major arsenic species present in fish and shellfish. Arsenosugars are the dominant arsenic species in seaweed. Both arsenobetaine and arsenosugars are present in mollusks (bivalves and gastropods) at comparable concentrations. Smaller amounts of arsenocholine, trimethylarsine oxide, tetramethylarsonium ion, DMA(V), MMA(V), inorganic arsenic, and unidentified arsenicals have also been found in seafood. Much less is known about the arsenic species in other food we eat. 

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