Results 1 to 10 of about 45,146 (169)

Elastic and inelastic scattering of 15N ions by 13C nuclei at energy 84 MeV [PDF]

open access: yesЯдерна фізика та енергетика, 2021
New experimental data of the 15N + 13C elastic and inelastic scattering were obtained at the energy Elab(15N) = 84 MeV. The data were analyzed within the coupled-reaction-channels method.
A. T. Rudchik   +18 more
doaj   +1 more source

Lichens as bio-monitors of polycyclic aromatic hydrocarbons: Measuring the impact of features and traffic patterns

open access: yesHeliyon, 2023
The role of road characteristics, including gradient and speed control devices, in influencing emission dynamics remains to be fully elucidated. Most studies have focused on fuel consumption as an indirect indicator of sector emissions instead of ...
Diana Marcela Uribe   +4 more
doaj   +1 more source

Determination of polycyclic aromatic hydrocarbons extracted from lichens by gas chromatography–mass spectrometry

open access: yesMethodsX, 2022
Lichens are well-known biomonitors for semi-volatile pollutants, due to their ability to absorb and retain different chemical compounds such as Polycyclic Aromatic Hydrocarbons (PAHs), directly linked to levels in the atmosphere.
Lina María Ortega Fernández   +4 more
doaj   +1 more source

Analysis of the urinary glucose-[15N, 15N]-ureide content in the study of the lactose-[15N, 15N]-ureide metabolism in healthy humans [PDF]

open access: yesEuropean Journal of Clinical Nutrition, 2011
Lactose-[15N, 15N]-ureide is used to study the fate of the colonic urea-nitrogen metabolism. During the passage through the gastrointestinal tract, lactose ureide is hydrolysed to glucose ureide, which is absorbed to a limited extent from the small intestine and is excreted urinarily. In the present study, a procedure has been developed to quantify the
V De Preter   +4 more
openaire   +1 more source

Elastic and inelastic scattering of 15N ions by 10B at energy 81 MeV. Isotopic effects in scattering of 15N + 10В, 15N + 11В, 14N + 10В nuclei [PDF]

open access: yesЯдерна фізика та енергетика, 2022
New experimental data of angular distributions for the elastic and inelastic scattering of 15N ions by 10B nuclei were obtained at the energy Elab(15N) = 81 MeV. The experimental data were analyzed within the coupled-reaction channels method (CRC).
А. Т. Rudchik   +16 more
doaj   +1 more source

Separate and Combined Effects of Silicon and Potassium on Growth and Nitrogen Uptake in Okra Plants as Influenced by Salinity of Irrigation Water [PDF]

open access: yesJournal of Stress Physiology & Biochemistry, 2022
The aim of this pot experiment was to determine the impact of foliar spraying of silicic acid (Si) with or without potassium fertilizer amendment (K) on dry matter (DM), nitrogen uptake (TN), efficient use of N fertilizer (NUE) and pod yield of okra ...
F. Kurdali, M. Al-Chammaa, F. Al-Ain
doaj  

Long-term fermented organic fertilizer application reduce urea nitrogen-15 loss from plastic shed agricultural soils

open access: yesAnnals of Agricultural Sciences, 2023
Continuous application of fermented organic fertilizer can improve soil quality, while the performance of nitrogen (N) in the improved soils is rarely investigated.
Hou Maomao   +6 more
doaj   +1 more source

Effects of Exogenous Silicic (Si) and Salicylic acid (SA) Applied Individually or in Combination on Barley Growth and Nitrogen Uptake under Various Watering Regimes [PDF]

open access: yesJournal of Stress Physiology & Biochemistry, 2023
This pot experiment investigated the effect of treatment with exogenous silicic (Si) and/or salicylic acids (SA) on dry matter (DM), nitrogen yield (NY) and soil N uptake from soil (Ndfs) and from fertilizer (Ndff) nitrogen use efficiency (%NUE) of ...
Fawaz Kurdali
doaj  

The contamination of commercial 15N2 gas stocks with 15N-labeled nitrate and ammonium and consequences for nitrogen fixation measurements. [PDF]

open access: yesPLoS ONE, 2014
We report on the contamination of commercial 15-nitrogen (15N) N2 gas stocks with 15N-enriched ammonium, nitrate and/or nitrite, and nitrous oxide. 15N2 gas is used to estimate N2 fixation rates from incubations of environmental samples by monitoring the
Richard Dabundo   +6 more
doaj   +1 more source

Natural abundance of 15N of a spruce forest ecosystem under acid rain and manipulated clean rain field conditions

open access: yesJournal of Forest Science, 2008
We analysed stable isotopes of N in a spruce forest under ambient rainfall (no further manipulation of the atmospheric input) and clean rain application (10 years of reduced inorganic N- and acid-constituent input).
S. P. Sah, R. Brumme, N. Lamersdorf
doaj   +1 more source

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