Results 131 to 140 of about 152,103 (369)
The FEBS Journal, EarlyView.Nitrate from food is first converted to nitrite by oral bacteria and then further processed in the intestine. The gut microbiota reduces nitrate and nitrite to ammonia or nitric oxide, preventing the formation of carcinogenic nitrosamines. Our analysis highlights Escherichia coli as a key player in this detoxification process, supported by other ...
Natalie Hager +4 more
wiley +1 more source
Change in groundwater chemistry as a consequence of suppression of floods: the case of the Rhine floodplain [PDF]
, 2003 Spatio-temporal variations of nitrogen, phosphorus and base cation concentrations in groundwater were related to the drastic change in hydrological conditions of the Rhine alluvial floodplain (Eastern France), which has been disconnected from the river ...
Sanchez-Pérez, José-Miguel +1 more
core +1 more source
Comparing Groundwater Sampling Devices for Denitrification Assessment Using the N2/Ar Method
Groundwater, EarlyView.Comparing N2, Ar, and excess‐N2 concentrations of groundwater samples collected with different devices shows that N2, Ar, and excess‐N2 concentrations significantly differ between the sampling devices. Using an electrical submersible pump for sampling yields the highest N2, Ar, and excess‐N2 concentrations.
Felix Fahrenbach, Thomas R. Rüde
wiley +1 more source
Plant, Cell &Environment, EarlyView.ABSTRACT Understanding nitrogen (N) isotopic fractionation during plant uptake is critical for interpreting δ15N variations in terrestrial ecosystems. We investigated isotopic discrimination during ammonium (NH4+) or nitrate (NO3−) uptake in maize (Zea mays) grown hydroponically under controlled conditions with 0.2 and 2 mM to represent high and low ...
Priscillia Semaoune +4 more
wiley +1 more source
Mobility and removal of nitrate in heterogeneous Eocene aquifers [PDF]
, 1998 n a study of the principles of lateral and vertical nitrate mobility and removal in unconfined heterogeneous fine sandy Eocene aquifers by long-term observation, no significant nitrate reduction could be observed over ...
Eppinger, Ralf, Walraevens, Kristine
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Restoration Ecology, EarlyView.Hydrologic wetland restoration in the Prairie Pothole Region is a common management practice to facilitate habitat and ecosystem recovery after degradation or drainage. Little is known about the recovery of sediment microbial communities relative to other organisms, such as vegetation, fish, and macroinvertebrates, even though they are critical for ...
Christine M. Cornish +2 more
wiley +1 more source
Water and Environment Journal, EarlyView.Tracer testing assessed hydraulics and nitrate removal in three full‐scale agricultural drainage treatment wetlands over 3.5 years (three tests). The first test showed rapid, short‐circuited flow and low residence time. After modifying the collection system, the second test increased residence time from 1 to 7 days.
Jan Kukačka +7 more
wiley +1 more source
Removal of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum Recovery
Kuangchan zonghe liyongThe aluminum nitride in the secondary aluminum (Al) dross release ammonia gas when it contacts with water. Therefore, the aluminum nitride poses a serious security threat to the environment. Denitrification is an important way to realize the harmless and
Neng QIU +4 more
doaj +1 more source
Organic residues - a resource for arable soils [PDF]
, 2005 An increased recirculation of urban organic residues to arable soils has several environmental benefits, but there is a need for reliable test systems to ensure that soil quality is maintained.
Odlare, Monica
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