搜索结果: 1-15 共查到“海洋科学 D-H fractionation”相关记录17条 . 查询时间(0.074 秒)
Characterization of stable isotope fractionation during methane production in the sediment of a eutrophic lake, Lake Dagow, Germany
stable isotope fractionation methane production in the sediment eutrophic lake Lake Dagow Germany
2014/4/18
We measuredd13CofCO2,CH4, and acetate-methyl in profundal sediment of eutrophic Lake Dagow by incubation experiments in the presence and absence of methanogenic inhibitors chloroform, bromoethane sulf...
Oxygen isotopic fractionation and exchange during bacterial nitrite oxidation
Oxygen isotopic fractionation exchange bacterial nitrite oxidation
2014/4/17
We elucidate the controls on thed18 O values of microbially produced nitrate by tracking thed18O of nitrite and nitrate during bacterial nitrite oxidation, which is the final step of the nitrification...
Stable isotope fractionation during the methanogenic degradation of organic matter in the sediment of an acidic bog lake, Lake Grosse Fuchskuhle
Stable isotope fractionation during the methanogenic degradation of organic matter in the sediment an acidic bog lake Lake Grosse Fuchskuhle
2014/4/16
Lake Grosse Fuchskuhle is an acidic bog lake, which develops an anoxic hypolimnion during the summer season, so that sediment organic matter is degraded anaerobically to CH4and CO2. The d13 C values o...
Methanogenic pathway, 13 C isotope fractionation, and archaeal community composition in the sediment of two clear-water lakes of Amazonia
isotope fractionation archaeal community composition
2014/4/16
We studied the methanogenic pathway and archaeal community composition in the sediment of two clearwater lakes, Lake Batata and Lake Mussura, in Amazonia. We measured CH4 production and d13
C of CO2,...
Oxygen isotopic exchange and fractionation during bacterial ammonia oxidation
fractionation during bacterial ammonia oxidation Oxygen isotopic
2014/4/16
We examined the oxygen isotopic systematics for ammonia oxidation, the first step in the regeneration of
nitrate from ammonium. In particular, oxygen isotopic fractionation and exchange with water we...
Nitrogen isotopic fractionation associated with growth on dinitrogen gas and nitrate by cyanobacteria
Nitrogen isotopic fractionation associated cyanobacteria
2014/4/18
This study investigated the bulk nitrogen isotopic composition and fractionation of marine and freshwater
cyanobacteria growing at the expense of atmospheric dinitrogen gas (N2) or nitrate (NO{
3
)...
Nitrogen and oxygen isotope fractionation during dissimilatory nitrate reduction by denitrifying bacteria
Nitrogen and oxygen isotope fractionation dissimilatory nitrate reduction denitrifying bacteria
2014/4/21
We report the first measurements of coupled nitrogen (N) and oxygen (O) isotope fractionation of nitrate by laboratory cultures of denitrifying bacteria. Two seawater strains (Pseudomonas stutzeri, Oc...
Characterization of methanogenic Archaea and stable isotope fractionation during methane production in the profundal sediment of an oligotrophic lake (Lake Stechlin, Germany)
methanogenic Archaea stable isotope fractionation during methane production profundal sediment an oligotrophic lake
2014/4/22
The methanogenic archaeal community, methane production, and carbon isotopic fractionation were studied in the profundal sediments of oligotrophic Lake Stechlin. Because the water column of oligotroph...
Linking ecosystem dynamics and biogeochemistry: Sinking fractionation of organic carbon in a Swedish fjord
Linking ecosystem dynamics biogeochemistry Sinking fractionation organic carbon a Swedish fjord
2014/5/9
We studied the growth and sedimentation of a phytoplankton bloom in the Gullmar Fjord in spring 2001. Sinking fractionation, as measured by differential sinking of components having varied carbon isot...
Flow history explains temporal and spatial variation of carbon fractionation in stream periphyton
temporal and spatial variation carbon fractionation stream periphyton
2014/5/9
We investigated factors that contribute to isotopic carbon fractionation in periphytic biofilms in a human-altered headwater stream with a flashy hydrograph. Water velocity had an important effect on ...
Coupled nitrogen and oxygen isotope fractionation of nitrate during assimilation by cultures of marine phytoplankton
Coupled nitrogen oxygen isotope fractionation
2014/5/19
We report the first measurements of coupled nitrogen (N) and oxygen (O) isotopic variations of nitrate (NO )2
3
during its assimilation by laboratory cultures of marine phytoplankton and deriv...
D-H fractionation in Sporomusa ORIGINAL ARTICLE Blackwell Publishing, Ltd. Hydrogen isotope fractionation during H2 /CO2 acetogenesis: hydrogen utilization efficiency and the origin of lipid-bound hydrogen
ORIGINAL ARTICLE D-H fractionation
2014/4/8
Hydrogen metabolism was studied in the anaerobic bacterium, Sporomusa sp. strain DMG 58, by measuring
natural abundance levels of deuterium in H2
, H2O, and individual fatty acids during acetogenic ...
Relationship of nitrogen isotope fractionation to phytoplankton size and iron availability during the Southern Ocean Iron RElease Experiment (SOIREE)
nitrogen isotope fractionation phytoplankton size iron availability the Southern Ocean Iron RElease
2014/5/20
The 15N composition of sediments has been used as a proxy for nitrate utilization in surface waters to assess the role of Southern Ocean export production in glacial/interglacial changes in atmospheri...
Light-dependent carbon isotope fractionation in the coccolithophorid Emiliania huxleyi
Light-dependent carbon isotope fractionation coccolithophore Emiliania huxleyi
2014/5/26
The carbon isotopic composition of marine phytoplankton varies significantly with growth conditions. Aqueous CO2 concentration [CO2] and algal growth rate (μ) have been suggested to be important facto...
Hydrogen isotope fractionation in lipids of the methane-oxidizing bacterium Methylococcus capsulatus
Hydrogen isotope fractionation methane-oxidizing bacterium
2014/4/8
Hydrogen isotopic compositions of individual lipids from Methylococcus capsulatus, an aerobic,
methane-oxidizing bacterium, were analyzed by hydrogen isotope-ratio-monitoring gas chromatography–mass
...