搜索结果: 31-45 共查到“理学 oxygen”相关记录231条 . 查询时间(0.148 秒)
Semi-Lagrangian transport of oxygen isotopes in polythermal ice sheets: implementation and first results
Semi-Lagrangian transport oxygen isotopes polythermal ice sheets implementation first results
2014/12/19
Modelling the evolution of the Earth system on long timescales requires the knowledge and understanding of driving mechanisms, such as the hydrological cycle. This is dominant in all components of the...
Numerical simulations of oceanic oxygen cycling in the FAMOUS Earth-System model: FAMOUS-ES, version 1.0
Numerical simulations oceanic oxygen cycling FAMOUS Earth-System model FAMOUS-ES, version 1.0
2014/12/19
Addition and validation of an oxygen cycle to the ocean component of the FAMOUS climate model are described. At the surface, FAMOUS overestimates northern hemisphere oxygen concentrations whereas, at ...
δ18O water isotope in the iLOVECLIM model (version 1.0) – Part 3: A palaeo-perspective based on present-day data–model comparison for oxygen stable isotopes in carbonates
δ18O water isotope LOVECLIM model A paleo-perspective present-day data–model comparison oxygen stable isotopes carbonates
2014/12/12
Oxygen stable isotopes (δ18O) are among the most useful tools in palaeoclimatology/palaeoceanography. Simulation of oxygen stable isotopes allows testing how the past variability of these isotopes in ...
The effect of dominant negative EGR-1 and hyperbaric oxygen on immune cell apoptosis
Induction of cells and multicellular organisms physiology cell death cell research gene regulation
2014/12/11
The ultimate means of limiting the influence of an individual cell on the physiology of a multicellular organism is to induce the death of that cell. Apoptosis is a genetically regulated form of cell ...
Growth of chromidia-forming vahlkampfiid amoebae from Laguna Figueroa, Baja California del Norte, Mexico and Eel Pond, Woods Hole, Massachusetts, U.S.A. under limited oxygen gas conditions
Chromidia Biogeography Amoeba Low oxygen anoxia
2014/11/4
Paratetramitus jugosus, a vahlkampfiid amoebomastigote, was isolated into monoprotist/monobacterial (Bacillus sp.), cultures from laminated microbial mats (Laguna Figueroa, Baja California Norte, Mexi...
Documenting the History of Oxygen Depletion in Lake St. Croix, Minnesota, Using Chironomidae Remains in the Sedimentary Record
Lake St. Croix midge Chironomidae volume weighted hypolimnetic oxygen transfer function eutrophication
2014/11/4
Lake St. Croix is a natural impoundment located at the southern end of the St. Croix River. Land use changes since European settlement (c. 1850) have resulted in nutrient runoff, eutrophication, and p...
Geologists are letting the air out of a nagging mystery about the development of animal life on Earth.
Scientists have long speculated as to why animal species didn’t flourish sooner, once sufficient...
Geologists are letting the air out of a nagging mystery about the development of animal life on Earth.
Scientists have long speculated as to why animal species didn’t flourish sooner, once sufficient...
Using the Oxidation State of Iron Plagioclase to Evaluate Magma Oxygen Fugacity: A microXANES Study
Oxidation State Iron Plagioclase Evaluate Magma Oxygen Fugacity A micro XANES Study
2014/10/22
The goal of this study is to explore the relationship between the oxygen fugacity of a melt and the Fe3+/FeTotal of plagioclase crystals produced from the melt. If the relationship between the two can...
Documenting the History of Oxygen Depletion in Lake St. Croix, Minnesota, Using Chironomidae Remains in the Sedimentary Record
Oxygen Depletion in Lake St. Croix Minnesota Chironomidae Remains the Sedimentary Record
2014/10/20
Lake St. Croix is a natural impoundment located at the southern end of the St. Croix River. Land use changes since European settlement (c. 1850) have resulted in nutrient runoff, eutrophication, and p...
Growth of chromidia-forming vahlkampfid amoebae from Laguna Figueroa, Baja California del Norte, Mexico and Eel Pond, Woods Hole, Massachusett, U.S. A. under limited oxygen gas conditions
chromia-forming vahlkampfia amoebae Laguna Figueroa Baja California del Norte Mexico and Eel Pond Woods Hole Massachusett U.S. A. limited oxygen gas conditions
2014/10/20
Paratetramitus jugosus, a vahlkampfiid amoebomastigote, was isolated into monoprotist/monobacterial (Bacillus sp.), cultures from laminated microbial mats (Laguna Figueroa, Baja California Norte, Mexi...
Effects of temperature and irradiance on a benthic microalgal community: A combined two-dimensional oxygen and fluorescence imaging approach
benthic Two-dimensional oxygen fluorescence
2014/10/16
The effects of temperature and light on both oxygen (O2) production and gross photosynthesis were resolved in
a benthic microalgal community by combining two-dimensional (2D) imaging of O2 and variab...
Sources and fate of nitrate in a groundwater-fed estuary elucidated using stable isotope ratios of nitrogen and oxygen
nitrate oxygen isotope
2014/10/16
We used d15N-nitrate (NO{
3 ) and d18O-NO{
3 to unravel the provenance and fate of NO{
3 in a groundwater-fed
estuary. A total of 13 monthly and two time series surveys were undertaken in the Werr...
Biological- and physical-induced oxygen dynamics in melting sea ice of the Fram Strait
Biological- and physical-induced oxygen dynamics melting sea ice Fram Strait
2014/7/10
We investigated the production, consumption, and exchange of O2 in melting sea ice to assess the biological- and physical-induced O2 turnover. The underside of the ice was covered with 5–20 cm3 large,...
Oxygen isotopes as a valuable tool for measuring annual growth in tropical trees that lack distinct annual rings
tropical tree with non-distinct annual rings cellulose oxygen isotopes fractionation model Styrax tonkinensis Ficus semicordata var. semicordata
2017/4/11
Some trees from tropical areas lack visually detectable and consistent annual growth rings. As such, we have measured
the radial variation of cellulose oxygen isotopes in trees that grow in seasonall...