Results 21 to 30 of about 461,590 (157)

How elevated nitrogen load affects bacterial community structure and nitrogen cycling services in coastal water

open access: yesFrontiers in Microbiology, 2022
Nutrient pollution in the coastal environment has been accelerated by progressively intensifying aquaculture activities. Excessive nutrients can lead to coastal eutrophication with serious economic and ecological consequences.
Linus Shing Him Lo   +14 more
doaj   +1 more source

Rooted in richness: unearthing the economic and ecological synergy of crop rotation

open access: yesFrontiers in Sustainable Food Systems, 2023
IntroductionThis study deals with agricultural practices and their implications on soil health and crop yield using economic optimization. Specifically, the research focuses on the impact of different crops, such as canola, wheat, and meadow clover, on ...
Jaroslav Cerveny   +8 more
doaj   +1 more source

Global Distribution of Anaerobic Ammonia Oxidation (Anammox) Bacteria – Field Surveys in Wetland, Dryland, Groundwater Aquifer and Snow

open access: yesFrontiers in Microbiology, 2019
The discovery of anaerobic ammonia oxidation (anammox) expanded our knowledge on the microbial nitrogen cycle. Previous studies report that anammox bacteria are distributed in a wide range of habitats and plays significant roles in the global nitrogen ...
Yu Wang   +5 more
doaj   +1 more source

Nitrogen: from discovery, plant assimilation, sustainable usage to current enhanced efficiency fertilizers technologies – A review [PDF]

open access: yesRevista Brasileira de Ciência do Solo
From 1913 onwards, the global situation changed from a scenario of nitrogen (N) scarcity to an abundance of ammonia (NH3) produced synthetically via the Haber-Bosch process.
Bruno Maia Abdo Rahmen Cassim   +6 more
doaj   +1 more source

Polyester microplastic fibers in soil increase nitrogen loss via leaching and decrease plant biomass production and N uptake

open access: yesEnvironmental Research Letters, 2022
Microplastic contamination, like other global change factors, can induce effects on ecosystem functions and processes, affecting various soil biophysical properties.
Rosolino Ingraffia   +5 more
doaj   +1 more source

Nitric Oxide Isotopic Analyzer Based on a Compact Dual-Modulation Faraday Rotation Spectrometer

open access: yesSensors, 2015
We have developed a transportable spectroscopic nitrogen isotopic analyzer. The spectrometer is based on dual-modulation Faraday rotation spectroscopy of nitric oxide isotopologues with near shot-noise limited performance and baseline-free operation ...
Eric Zhang   +7 more
doaj   +1 more source

Distribution of Dissolved Nitrogen Compounds in the Water Column of a Meromictic Subarctic Lake

open access: yesNitrogen, 2021
In order to better understand the biogeochemical cycle of nitrogen in meromictic lakes, which can serve as a model for past aquatic environments, we measured dissolved concentrations of nitrate, nitrite, ammonium, and organic nitrogen in the deep (39 m ...
Taisiya Ya. Vorobyeva   +5 more
doaj   +1 more source

Nitrogen cycling in sheep [PDF]

open access: yesProceedings of the Nutrition Society, 1973
Introduction Many of the difficulties in predicting the response of ruminants to supplementation of low-protein diets with non-protein nitrogen (NPN) substances arise because there is a lack of information concerning the quantities of N that recycle between the tissues and the N pools in the digestive tract. Various aspects of N mctabolism in ruminants
J V, Nolan, B W, Norton, R A, Leng
openaire   +2 more sources

Ecological Energetic Perspectives on Responses of Nitrogen-Transforming Chemolithoautotrophic Microbiota to Changes in the Marine Environment

open access: yesFrontiers in Microbiology, 2017
Transformation and mobilization of bioessential elements in the biosphere, lithosphere, atmosphere, and hydrosphere constitute the Earth’s biogeochemical cycles, which are driven mainly by microorganisms through their energy and material metabolic ...
Hongyue Dang, Chen-Tung A. Chen
doaj   +1 more source

NON-MODIFIED PT ELECTRODES ENABLING ACCURATE VOLTAMMETRIC QUANTIFICATION OF AMMONIA IN WATER SAMPLES [PDF]

open access: yesQuímica Nova
Even though ammonia is a natural component of aquatic environments, elevated concentrations indicate pollution and environmental degradation. Consequently, efficient analytical methods for monitoring ammonia levels are crucial for preserving water ...
Vitoria B. Messias   +2 more
doaj   +1 more source

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