منابع مشابه
Rare earth element sorption onto hydrous manganese oxide: a modeling study.
Manganese oxides are important scavengers of rare earth elements (REE) in hydrosystems. However, it has been difficult to include Mn oxides in speciation models due to the lack of a comprehensive set of sorption reactions consistent with a given surface complexation model (SCM), as well as discrepancies between published sorption data and predictions using the available models. Surface complexa...
متن کاملElement substitution by living organisms: the case of manganese in mollusc shell aragonite
Determining the manganese concentration in shells of freshwater bivalves provides a unique way to obtain information about climate and environmental changes during time-intervals that pre-date instrumental data records. This approach, however, relies on a thorough understanding of how manganese is incorporated into the shell material -a point that remained controversial so far. Here we clarify ...
متن کاملManganese import is a key element of the OxyR response to hydrogen peroxide in Escherichia coli.
Very little manganese is imported into Escherichia coli under routine growth conditions: the import system is weakly expressed, the manganese content is low, and a manganese-dependent enzyme is not correctly metallated. Mutants that lack MntH, the importer, grow at wild-type rates, indicating that manganese plays no critical role. However, MntH supports the growth of iron-deficient cells, sugge...
متن کاملManganese, a Normal Element in the Tissues of the Fresh Water Clams, Un10 and Anodonta
Manganese in the tissues of normal animals may be regarded as a rare element. In traces it is known to be present in a number of marine animals, as was shown by Pichard.’ Hoppe-Seyler2 is authority for the statement that it is not infrequently present in human blood and in the liver: but it is neither constant in its occurrence nor significant in amount. Among the lower animals there is at leas...
متن کاملThe ubiquitous yybP-ykoY riboswitch is a manganese-responsive regulatory element.
The highly structured, cis-encoded RNA elements known as riboswitches modify gene expression upon binding a wide range of molecules. The yybP-ykoY motif was one of the most broadly distributed and numerous bacterial riboswitches for which the cognate ligand was unknown. Using a combination of in vivo reporter and in vitro expression assays, equilibrium dialysis, and northern analysis, we show t...
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ژورنال
عنوان ژورنال: Australian Journal of Chemistry
سال: 2019
ISSN: 0004-9425
DOI: 10.1071/ch19107