搜索结果: 1-12 共查到“理学 organic nitrogen”相关记录12条 . 查询时间(0.102 秒)
Organic nitrogen in PM2.5 aerosol at a forest site in the Southeast US
Organic nitrogen PM2.5 aerosol forest site Southeast US
2010/3/5
There is growing evidence that organo-nitrogen compounds may constitute a significant fraction of the aerosol nitrogen (N) budget. However, very little is known about the abundance and origin of this ...
Organic matter sedimentation in the western Barents Sea region:Terrestrial and marine contribution based on isotopic composition and organic nitrogen content
Organic matter sedimentation western Barents Sea region Terrestrial and marine contribution
2009/12/2
Here, we present bulk organic geochemical data from a spatial grid of surface samples from the western Barents Sea region. The results show that the distribution of organic carbon in surface sediments...
Spatial and temporal variations in dissolved and particulate organic nitrogen in the equatorial Pacific:biological and physical influences
Spatial and temporal variations organic nitrogen equatorial Pacific
2010/1/18
To quote Libby and Wheeler (1997), "we have only a cursory knowledge of the distributions of dissolved and particulate organic nitrogen" in the equatorial Pacific. A decade later, we are still in need...
Dissolved organic nitrogen uptake by seagrasses
Dissolved organic nitrogen uptake seagrasses
2014/4/21
We examined the ability of seagrasses to take up dissolved organic nitrogen (DON) with leaves (in situ) and roots (laboratory) in an oligotrophic tropical offshore meadow in Indonesia using 15 N-label...
Isotopic heterogeneity and cycling of organic nitrogen in the oligotrophic ocean
Isotopic heterogeneity cycling of organic nitrogen oligotrophic ocean
2014/4/22
We measured the nitrogen (N) isotopic composition (δ15N) of a large set (n = 38) of high-molecular-weight (HMW) dissolved organic nitrogen (DON) samples isolated from the tropical and subtropical Nort...
The influence of the balance of inorganic and organic nitrogen on the trophic dynamics of microbial food webs
the balance of inorganic organic nitrogen
2014/4/22
A nutrient-manipulation mesocosm study was conducted in Norwegian coastal waters to determine the effect
on a nitrogen-limited microbial food web of changes in the relative concentrations of dissolve...
Groundwater-transported dissolved organic nitrogen exports from coastal watersheds
Groundwater-transported dissolved organic nitrogen exports coastal watersheds
2014/5/5
We analyzed groundwater-transported nitrogen (N) exports from 41 watershed segments that comprised 10 Cape Cod, Massachusetts watersheds to test the hypotheses that chemical form of N exports is relat...
Sponges and ascidians control removal of particulate organic nitrogen from coral reef water
Sponges and ascidians control removal particulate organic nitrogen coral reef water
2014/5/13
We studied removal rates of plankton and total particulate organic nitrogen (PON) by benthic reef communities from the overlying water in a large experimental flume. The flume was filled with mixtures...
Role of wetlands and developed land use on dissolved organic nitrogen concentrations and DON/TDN in northeastern U.S. rivers and streams
Role of wetlands developed land dissolved organic nitrogen concentrations DON/TDN northeastern U.S. rivers and streams
2014/5/19
Previous studies have shown that watersheds with significant human development (i.e., urban and agricultural land use) generally have higher concentrations and fluxes of dissolved inorganic nitrogen (...
Evidence for terrigenous dissolved organic nitrogen in the Arctic deep sea
Arctic deep sea terrigenous dissolved organic nitrogen
2014/5/14
To trace the fate of terrigenous dissolved organic nitrogen (DON) in the Arctic Ocean, principal-components
analyses (PCA) was used on a data set of 13 amino acids released via hydrolyses from a tota...
The role of the picoeukaryote Aureococcus anophagefferens in cycling of marine high-molecular weight dissolved organic nitrogen
picoeukaryote Aureococcus anophagefferens marine high-molecular weight dissolved organic nitrogen
2014/5/21
Environmental evidence suggests that Aureococcus anophagefferens (Pelagophyceae), a eukaryotic picoplankton that blooms in coastal seawaters, can outcompete other organisms because of its ability to u...
Sorptive fractionation of dissolved organic nitrogen and amino acids onto fine sediments within the Amazon Basin
dissolved organic nitrogen amino acids
2014/5/30
A consistent observation of river waters in the Amazon Basin and elsewhere is that suspended fine particulate
organic matter (FPOM) is compositionally distinct from coexisting dissolved organic...