搜索结果: 1-14 共查到“海洋科学 bioavailability”相关记录14条 . 查询时间(0 秒)
An evaluation of iron bioavailability and speciation in western Lake Superior with the use of combined physical, chemical, and biological assessment
An evaluation of iron bioavailability speciation in western Lake Superior use of combined physical chemical biological assessment
2014/4/18
An iron-dependent cyanobacterial bioreporter (Synechococcus strain KAS101) was used in unison with size-fractionated iron content (>0.45, <0.45, <0.02 μm), and chemical characterization of iron comple...
Bioavailability and export of dissolved organic matter from a tropical river during base- and stormflow conditions
Bioavailability base- stormflow conditions
2014/4/18
Concentrations, bioavailability, and export of dissolved organic matter (DOM), particulate organic matter
(POM), and nutrients from the Wailuku River, Hawai‘i, U.S.A., were examined under base- and s...
An evaluation of iron bioavailability and speciation in western Lake Superior with the use of combined physical, chemical, and biological assessment
iron bioavailability western Lake Superior
2014/4/18
An iron-dependent cyanobacterial bioreporter (Synechococcus strain KAS101) was used in unison with sizefractionated iron content (.0.45, ,0.45, ,0.02 mm), and chemical characterization of iron complex...
Some thoughts on the concept of colimitation: Three definitions and the importance of bioavailability
Some thoughts the concept of colimitation Three definitions bioavailability
2014/4/21
We discuss the concept of colimitation of primary productivity in aquatic environments, with an emphasis on reconciling this concept with recent advances in marine bioinorganic chemistry. Colimitation...
Extracellular production of superoxide by marine diatoms: Contrasting effects on iron redox chemistry and bioavailability
Extracellular production of superoxide marine diatoms Contrasting effects iron redox chemistry and bioavailability
2014/5/9
We report the extracellular production of superoxide in cultures of the marine diatoms Thalassiosira weissflogii and Thalassiosira pseudonana. In EDTA-buffered media with ~45 pmol L-1 iron (Fe)(III)',...
Molecular-level chemical characterization and bioavailability of dissolved organic matter in stream water using electrospray-ionization mass spectrometry
Molecular-level chemical characterization bioavailability dissolved organic matter stream water electrospray-ionization mass spectrometry
2014/5/8
We used electrospray-ionization mass spectrometry (ESI-MS) to characterize, at the compound level, dissolved organic matter (DOM) composition and bioavailability in two streams. There was considerable...
Seasonal bioavailability of dissolved organic carbon and nitrogen from pristine and polluted freshwater wetlands
Seasonal bioavailability pristine
2014/5/19
We examined the chemical composition and bioavailability of dissolved organic carbon (DOC) and nitrogen
(DON) from two pristine and two polluted cedar bog wetlands across three seasons. Pristine and ...
The biological availability of Fe has been demonstrated to strongly influence both primary and secondary production in pelagic as well as coastal upwelling high-nutrient low-chlorophyll (HNLC) r...
Phototransformation of riverine dissolved organic matter (DOM) in the presence of abundant iron: Effect on DOM bioavailability
Phototransformation riverine dissolved organic matter abundant iron DOM bioavailability
2014/5/14
We conducted studies with high-molecular-weight (HMW) and low-molecular-weight (LMW), hydrophobic, and hydrophilic dissolved organic matter (DOM) from an oligotrophic alpine river, the Tagliamento Riv...
Bioavailability of iron to Trichodesmium colonies in the western subtropical Atlantic Ocean
iron Trichodesmium colonies western subtropical Atlantic Ocean
2014/5/22
Trichodesmium provides new nitrogen (N) to marine surface waters via N2 fixation, a process that requires a substantial amount of iron (Fe). Organic ligands in seawater that bind Fe could either incre...
Bioavailability of DON from natural and anthropogenic sources to estuarine plankton
Bioavailability of DON from natural anthropogenic sources estuarine plankton
2014/5/26
Utilization of dissolved organic nitrogen (DON) from natural (forests) and anthropogenic (animal pastures, urban/suburban storm water runoff) sources (three sites per source) by estuarine plankton com...
Bioavailability of natural colloid-bound iron to marine plankton: Influences of colloidal size and aging
natural colloid-bound iron marine plankton
2014/5/30
Iron (Fe) is mostly complexed with the organic ligands or colloids that are very abundant in natural seawater. In
this study, natural colloids were isolated by ultrafiltration and radiolabeled ...
Bioavailability of particle-associated silver, cadmium, and zinc to the estuarine amphipod, Leptocheirus plumulosus, through dietary ingestion
Bioavailability particle-associated silver cadmium zinc to the estuarine amphipod Leptocheirus plumulosus dietary ingestion
2014/6/17
We conducted experiments to determine effects of particle type on assimilatory metal bioavailability to Leptocheirus plumulosus, an infaunal, estuarine amphipod that is commonly used in sediment toxic...
Further evidence of elemental composition as an indicator of the bioavailability of humic substances to bacteria
elemental composition bioavailability humic substances to bacteria
2014/6/17
Batch culture experiments examined the ability of an isolated bacterial community to utilize four humic substances with similar molecular size but variable elemental composition. Univariate and multiv...