Reactivity of inorganic Mn and Mn desferrioxamine B with O2, O2(-), and H2O2 in seawater.
Reactivity of inorganic Mn and Mn desferrioxamine B with O2, O2(-), and H2O2 in seawater.
复制标题
无机Mn和Mn去铁胺B与海水中O2、O2(-)和H2O2的反应性
DOI:
10.1021/es4016603
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发表时间:
2013
影响因子:
11.4
通讯作者:
P. L. Croot
中科院分区:
文献类型:
--
作者:
Wuttig;M. I. Heller;P. L. Croot
Manganese (Mn) is a required element for oceanic phytoplankton as it plays a critical role in photosynthesis, through its unique redox chemistry, as the active site in photosystem II, and in enzymes that act as defenses against reactive oxygen species (ROS), most notably for protection against superoxide (O2–), through the action of superoxide dismutase (SOD), and against hydrogen peroxide (H2O2) via peroxidases and catalases. The distribution and redox speciation of Mn in the ocean is also apparently controlled by reactions with ROS. Here we examine the connections between ROS and dissolved Mn species in the upper ocean using field and laboratory experimental data. Our results suggest it is unlikely that significant concentrations of Mn(III) are produced in the euphotic zone, as in the absence of evidence for the existence of strong Mn(III) ligands, Mn(II) reacts with O2–to form the short-lived transient manganous superoxide, MnO2+, which may react rapidly with other redox species in a manner similar to O2–. Experiments with the strong Mn(III) chelator, desferrioxamine B (DFB), in seawater indicated that the Mn(III) species are unlikely to form, as formation of the precursor Mn(II) complex is hindered due to the stability of the Ca complex with DFB.
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DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
C. Guieu;R. Duce;R. Arimoto
通讯作者:
R. Arimoto
DOI:
--
发表时间:
1976
期刊:
影响因子:
--
作者:
M. Pick;J. Rabani
通讯作者:
J. Rabani
影响因子:
3.9
作者:
S. Hahn;C. Krishna;A. Samuni;J. Mitchell;A. Russo
通讯作者:
A. Russo
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
L. W. Winkler
通讯作者:
L. W. Winkler
影响因子:
3.9
作者:
J. Rush;Z. Maskos;W. Koppenol
通讯作者:
W. Koppenol