搜索结果: 1-15 共查到“理学 Marine Sediments”相关记录24条 . 查询时间(0.163 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...
Degradation of naphthalene and phenanthrene in contaminated marine sediments under sulfate reducing conditions
Biological sciences Degradation Naphthalene Phenanthrene Contaminated Marine sediments Sulfate reducing
2015/1/28
This research examined the environmental fate of two polycyclic aromatic hydrocarbons (PAHs), naphthalene and phenanthrene, under in situ, sulfate-reducing conditions, and the composition of the micro...
Solid phase phosphorus species and preservation of fish remains in marine sediments of areas of high primary productivity and oxygen seasonality (36°S, central South Chile)
fish debris biogenic apatite seasonal coastal upwelling hypoxia central-south Chile
2017/4/10
The main input of phosphorus to the ocean is associated with river runoff, while this element leaves the marine system
via burial in the sediments. Solid phase P accumulation is a function of bottom ...
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...
Distribution of Pu isotopes in marine sediments in the Pacific 30 km off Fukushima after the Fukushima Daiichi nuclear power plant accident
Fukushima plutonium isotopes western North Pacific marine sediments SF-ICP-MS
2017/4/11
The Fukushima Dai-ichi Nuclear Power Plant (DNPP) accident has caused serious contamination of the marine environment
from atmospheric fallout deposition and the direct discharges of highly radioacti...
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...
Polycyclic aromatic hydrocarbons (PAHs) in Norwegian and Russian Arctic marine sediments:concentrations,geographical distribution and sources
Polycyclic aromatic hydrocarbons Norwegian Russian Arctic marine sediments
2009/12/3
Polycyclic aromatic hydrocarbons (PAHs) are key contaminants of concern under the Arctic Environmental Monitoring Programme (AMAP) due to their carcinogenic potential. The concentration of the differe...
Initial Results of a new Free Fall-Cone Penetrometer (FF-CPT) for geotechnical in situ characterisation of soft marine sediments
Initial Results Free Fall-Cone Penetrometer situ characterisation soft marine sediments
2009/12/3
Two of the most crucial sediment physical parameters controlling slope stability and trigger mechanism of mass movements are shear strength and excess pore pressure. Since both of them require in situ...
Modeling nonlinear compressional waves in marine sediments
nonlinear compressional waves marine sediments
2009/10/30
A computational model is presented which will help guide and interpret an upcoming series of experiments on nonlinear compressional waves in marine sediments. The model includes propagation physics of...
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...