搜索结果: 1-15 共查到“海洋科学 marine sediments”相关记录15条 . 查询时间(0.229 秒)
Estimation of methanogenesis by quantification of coenzyme F430 in marine sediments
methane hydrate methanogens function-specific compound analysis marine sedimen
2017/4/10
Coenzyme F430 is the hydrocorphinoid nickel complex which acts as active site in methyl-coenzyme M reductase
(MCR). The MCR-F430 complex catalyzes the last step of methanogenesis: reduction of methyl...
Gas Hydrates in Marine Sediments:Lessons from Scientific Ocean Drilling
Gas Hydrates Marine Sediments Scientific Ocean Drilling
2015/7/24
Certain low-molecular-weight gases, such as methane, ethane, and carbon dioxide, can combine with water to form ice-like substances at high pressure or low temperature. These compounds, commonly calle...
Melting history of the Patagonian Ice Sheet during Termination I inferred from marine sediments
Patagonian Ice Sheet Termination I melting history Al2O3 flux marine sediments
2017/4/11
To investigate the melting history of the Patagonian Ice Sheet (PIS) during the last deglaciation, we reconstructed
Al2O3 flux in sediments from the Magellanes fjord (53°S) and southern Patagonia (55...
Oscillatory porewater bioadvection in marine sediments induced by hydraulic activities ofArenicola marina
Oscillatory porewater bioadvection marine sediments hydraulic activities of Arenicola marina
2014/4/17
We employed real-time pressure recording and high temporal resolution two-dimensional oxygen imaging to characterize the porewater bioadvection related to hydraulic activities of Arenicola marina, a w...
Simultaneous determination of in situ vertical transitions of color, pore-water metals, and visualization of infaunal activity in marine sediments
Simultaneous situ vertical transitions of color
2014/4/17
The vertical color transition from brown to gray-green in marine sediments is linked to the Fe redox boundary
and is commonly used as a proxy for biogeochemical state. We combine time-lapse sediment ...
The role of soluble Fe(III) in the cycling of iron and sulfur in coastal marine sediments
The role of soluble Fe(III) cycling of iron sulfur in coastal marine sediments
2014/5/9
In marine sediments, Fe(III) is found predominantly as a solid. Recently, however, soluble species of Fe3+ complexed by natural organic ligands have been detected in coastal marine sediments with volt...
Carbon and hydrogen isotopic compositions of sterols from riverine and marine sediments
Carbon hydrogen isotopic compositions
2014/5/13
The sources (marine algae, terrestrial C3 and C4 plants) of sterols deposited to sediments along a riverine–marine
transect from Ohtsuchi River in Iwate Prefecture, Japan, to the northwestern Paci...
Pore-water advection and solute fluxes in permeable marine sediments (I): Calibration and performance of the novel benthic chamber system Sandy
Pore-water advection marine sediments Calibration and performance benthic chamber system Sandy
2014/5/9
This contribution introduces the benthic chamber system Sandy that was developed for studying in situ solute fluxes in permeable sandy sediments where advective pore-water transport can dominate solut...
Pore-water advection and solute fluxes in permeable marine sediments (II): Benthic respiration at three sandy sites with different permeabilities (German Bight, North Sea)
Pore-water advection solute fluxes permeable marine sediments Benthic respiration three sandy sites different permeabilities
2014/5/9
This contribution presents total oxygen uptake (TOU) rates and nutrient fluxes of organically poor permeable shelf sands of the German Bight. Measurements have been made in situ with the novel autonom...
The effects of infaunal biodiversity on biogeochemistry of coastal marine sediments
The effects of infaunal biodiversity biogeochemistry
2014/5/19
We tested the role of benthic infaunal functional diversity in regulating the biogeochemistry of nearshore sediments using laboratory microcosms. Single and multispecies assemblages of deposit-feeding...
Denitrification and anammox activity in Arctic marine sediments
Denitrifi cation anammox activity
2014/5/19
We measured rates of N2
production through anaerobic NH oxidation with NO (anammox) and denitrification 1 2
4 2
in permanently cold (from 21.78C to 48C) sediments off the east and west coasts...
Quantification, base composition, and fate of extracellular DNA in marine sediments
Quantification, base composition fate of extracellular DNA marine sediments
2014/5/27
The discovery of high concentrations of DNA in marine sediments unaccounted for by living biomass suggests the presence of a large fraction of extracellular DNA, which might play an important role in ...
A pH plate fluorosensor (optode) for early diagenetic studies of marine sediments
A pH plate fluorosensor early diagenetic marine sediments
2014/5/26
Pore water pH distributions are closely coupled to early diagenetic reactions and transport processes in surficial sediments. In this study, an optical plate fluorosensor for rapid two-dimensional det...
Dissolved organic carbon production and consumption in anoxic marine sediments: A pulsed-tracer experiment
consumption anoxic marine sediments
2014/5/30
The degradation of phytoplankton and seagrass organic carbon (OC) in sulfate-reducing (SR) and methaneproducing (MP) sediments was tracked by measuring concentrations of particulate OC (POC), hydrolys...
Reworking of amino acid in marine sediments: Stable carbon isotopic composition of amino acids in sediments along the Washington coast
Reworking of amino acid in marine sediments Stable carbon isotopic composition of amino acids sediments along the Washington coast
2014/5/30
The stable carbon isotopic composition of nine individual amino acids were investigated in phytoplankton and zooplankton, estuarine plankton, terrigenous material, marine fecal material, and clay mine...