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BARIUM
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
A soft silvery metallic element of the alkali earth group; found in barite
Synonyms:
atomic number 56; Ba; barium
Classified under:
Hypernyms ("barium" is a kind of...):
metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)
Hyponyms (each of the following is a kind of "barium"):
baryta (any of several compounds of barium)
Holonyms ("barium" is a substance of...):
barite; barium sulphate; barytes; heavy spar (a white or colorless mineral (BaSO4); the main source of barium)
Derivation:
baric (of or relating to or containing barium)
Context examples:
Barite, a mineral compound of barium, is now a direct and accurate proxy for marine productivity, marine climate, and marine life evolution in general.
(Researchers discover the oceanic precipitation mechanism for barium, which is a proxy for marine bacterial productivity, University of Granada)
The sulfate salt of barium, an alkaline, divalent metal.
(Barium sulfate, NCI Thesaurus)
The results of this experimental study support the hypothesis that during periods of high productivity, large amounts of organic matter subjected to bacterial degradation along with the production of extracellular polymeric substances lead to barium accumulation, they add.
(Researchers discover the oceanic precipitation mechanism for barium, which is a proxy for marine bacterial productivity, University of Granada)
At the initial stages of barium bioaccumulation this element binds to phosphate groups present in EPS, thus forming an amorphous precursor which later evolves to barium sulfate (barite crystals) after replacing phosphate groups with sulfate groups.
(Researchers discover the oceanic precipitation mechanism for barium, which is a proxy for marine bacterial productivity, University of Granada)
Experiments carried out with diverse marine bacteria shed light on the processes by which barite precipitates in bacterial biofilms from the bioaccumulation of barium in bacterial cells and extracellular polymeric substances (EPS), Francisca Martínez Ruiz and María Teresa González Muñoz, researcher from the Andalusian Earth Sciences Institute (IACT) and professor emeritus of the Department of Microbiology at the UGR, respectively, explain.
(Researchers discover the oceanic precipitation mechanism for barium, which is a proxy for marine bacterial productivity, University of Granada)
