Results 1 to 10 of about 91,818 (202)

The impact of vegetation on fractionation of rare earth elements(REE) during water–rock interaction [PDF]

, 2006
Previous studies on waters of a streamlet in the Vosges mountains (eastern France) have shown that Sr and rare earth elements (REE) principally originate from apatite dissolution during weathering. However, stream water REE patterns normalized to apatite
Aubert, Dominique, Chabaux, F., Gauthier-Lafaye, François, Pierret, Marie-Claire, Probst, Anne, Steinmann, Marc, Stille, Peter, Viville, Daniel   +7 more
core   +5 more sources

Determination of diquat and paraquat by high performance liquid chromatography in areas of environmental monitoring

Учёные записки Казанского университета: Серия Естественные науки, 2021
The concentrations of diquat and paraquat, two members of the class of quaternary ammonium compounds (QAC), were measured using high performance liquid chromatography (HPLC) with UV detection and sample preparation with solid phase extraction.
I.M. Fitsev, A.Yu. Likhacheva, A.M. Sayfutdinov, A.Z. Mukharlyamova, S.L. Mokhtarova, Z.R. Nasybullina   +5 more
doaj   +1 more source

Molecular study of lipids in humic acids by sequential chemical degradation [PDF]

, 2009
Lipidy v půdě vykazují poměrně vysokou resistenci k biodegradaci, mohou proto tak zajistit informace o zdrojích organické hmoty a diagenetických procesech. Půdní organická hmota je vysoce heterogenní a vyskytují se v ní různé dynamické systémy.
Bachratá, Radka
core  

Growing media constituents determine the microbial nitrogen conversions in organic growing media for horticulture [PDF]

, 2016
Vegetables and fruits are an important part of a healthy food diet, however, the eco-sustainability of the production of these can still be significantly improved.
Boon, Nico, Grunert, Oliver, Hernandez Sanabria, Emma, Perneel, Maaike, Reheul, Dirk, Van Labeke, Marie-Christine, Vlaeminck, Siegfried   +6 more
core   +1 more source

Investigation of soil resistivity impacts on the electrodes of grounding system subjected to lightning strikes

IET Generation, Transmission & Distribution
In this paper, the study of the homogeneous resistivity and two‐layer soil influences on the performance of the electrodes of grounding systems subjected to lightning strikes is carried out considering soil ionization.
Osama E. Gouda, Adel Z. El Dein, Sara Yassin, Matti Lehtonen, Mohamed M. F. Darwish   +4 more
doaj   +1 more source

Effect of irrigation with magnetized and ionized water on yield, nutrient uptake and water-use efficiency of winter wheat in Xinjiang, China

Agricultural Water Management
Magnetization can alter hydrogen bonds among water molecules, leading to changes in water physicochemical properties, and ionization can use frequencies to break down polymers for better solubility.
Xinyue Chen, Kai Zhang, Xiaopeng Gao, Xin Ai, Guoyue Chen, Xiaomeng Guo, Chengcheng Wu, Lu Zhang   +7 more
doaj   +1 more source

Atmospheric amines and ammonia measured with a chemical ionization mass spectrometer (CIMS) [PDF]

Atmospheric Chemistry and Physics, 2014
We report measurements of ambient amines and ammonia with a fast response chemical ionization mass spectrometer (CIMS) in a southeastern US forest and a moderately polluted midwestern site during the summer.
Y. You, V. P. Kanawade, J. A. de Gouw, A. B. Guenther, S. Madronich, M. R. Sierra-Hernández, M. Lawler, J. N. Smith, S. Takahama, G. Ruggeri, A. Koss, K. Olson, K. Baumann, R. J. Weber, A. Nenes, H. Guo, E. S. Edgerton, L. Porcelli, W. H. Brune, A. H. Goldstein, S.-H. Lee   +20 more
doaj   +1 more source

SOIL IONIZATION DUE TO HIGH PULSE TRANSIENT CURRENTS LEAKED BY EARTH ELECTRODES [PDF]

Progress In Electromagnetics Research B, 2009
This paper proposes a numerical model of the soil ionization phenomena that can occur when earth electrodes are injected by high pulse transient currents, as the one associated with a direct lightning stroke. Based on finite difference time domain numerical scheme, this model ascribes the electrical breakdown in the soil to the process of discharge in ...
ALA, Guido, DI SILVESTRE, Maria Luisa, VIOLA, Fabio, FRANCOMANO, Elisa   +3 more
openaire   +2 more sources

Monte Carlo calculations of high energy nucleon meson cascades and applications to galactic cosmic ray transport [PDF]

, 1972
Results obtained using a recently developed calculational method for determining the nucleon-meson cascade induced in thick materials by high-energy nucleons and charged pions are presented.
Alsmiller, R. G., Jr., Armstrong, T. W., Chandler, K. C.   +2 more
core   +1 more source

Monte Carlo evaluation of the impact of subsequent strokes on backflashover rate [PDF]

, 2015
The paper deals with the impact of subsequent strokes on the backflashover rate (BFR) of HV overhead transmission lines (OHLs), assessed by means of an ATP-EMTP Monte Carlo procedure.
Gatta, Fabio Massimo, Geri, Alberto, Lauria, Stefano, Maccioni, Marco   +3 more
core   +1 more source