Results 251 to 260 of about 91,586 (302)

Grounding Systems Modeling Including Soil Ionization

IEEE Transactions on Power Delivery, 2008
This paper presents a hybrid frequency-time domain methodology for the modeling of grounding systems considering the nonlinear effect of soil ionization. The method is validated by analyzing two typical grounding systems under high soil ionization effects.
J.C. Salari, C. Portela
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Spatially discontinuous ionization phenomenon in inhomogeneous soil

Science China Technological Sciences, 2010
By using X-ray film imaging technology, a phenomenon of discontinuous ionization was observed in the inhomogeneous soil around the grounding electrode on which a surge voltage was applied. A simplified two-phase solid-gas model was built to study the electric field distribution in the soil to explain the discontinuous ionization phenomenon.
BaoPing Zhang, JinLiang He, Rong Zeng
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EFFECT OF IONIZING RADIATION ON SOIL MICROORGANISMS

Soil Science, 1961
The effects of neutron and gamma radiation on soil bacteria, actinomycetes, and fungi, and on nitrifying bacteria, nitrogen fixation, and CO/ sub 2/ evolution were studied. Soil samples from alfalfa and ammonia-treated soils at two moisture levels were exposed at a dosage of 4.13 x 10/sup 12/ neutrons per cm/sup 2/ and a mean gamma dosage of 3.4 x 10 ...
RICHARD STANOVICK, JOEL GIDDENS, R. A. McCREERY   +2 more
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Methodologies for determination of soil ionization gradient

Journal of Electrostatics, 2012
In this paper the results of the research being carried out on the impulse characteristics of soils and more specifically the ionization voltage gradient are presented. The determination of the soil ionization voltage and the respective gradient using a universally accepted method is yet to be established. Aiming at meeting this need, the present paper
Fani E. Asimakopoulou, Ioannis F. Gonos, Ioannis A. Stathopulos   +2 more
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FDTD simulation of grounding electrodes considering soil ionization

2012 International Conference on Lightning Protection (ICLP), 2012
If an impulse or surge high current flows in a grounding electrode, the soil in the vicinity of the grounding electrode would be ionized and the voltage generated at the top of the grounding electrode would be reduced. Recently, Ala et al. (2008) have proposed a soil ionization model, on the basis of the dynamic soil-resistivity model of Liew and ...
Ken Otani, Yuki Shiraki, Yoshihiro Baba, Naoto Nagaoka, Akihiro Ametani, Naoki Itamoto   +5 more
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Laser Two-Photon Ionization of Pyrene on Contaminated Soils

Analytical Chemistry, 1996
We report a first attempt to use the laser multiphoton ionization method for analysis of trace aromatic compounds on the surface of environmental (soils) and artificial (silica) samples. The measurement setup is composed of a N(2) pulsed laser and a fast conductivity detection system.
V V, Gridin, A, Korol, V, Bulatov, I, Schechter   +3 more
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Influence of ionized saline water on soil water and salt transport in saline soils

Irrigation and Drainage, 2022
AbstractThe utilization of saline water plays an important role in agricultural production in saline areas to overcome freshwater shortages. Ionized saline water might alleviate the adverse effects of salinity on soil and plants. In this study, field experiments were conducted to study the effect of ionized saline water on the soil water content and ...
Kai Wei, Shudong Lin, Jihong Zhang, Quanjiu Wang, Yi Guo, Weiyi Mu   +5 more
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Electro-Filtering Spray Ionization Source for Soil Analysis

Analytical Letters, 2015
ABSTRACTAn electro-filtering spray ionization source for ambient mass spectrometry is reported. The ion source was assembled with a conical metal filter with a paper cone. The performance of the new ion source was characterized by the analysis of soil. Soil was directly introduced into the filter-paper cone and solvent was added.
Yinjuan Chen, Chongsheng Xu, Fuxing Xu, Kai Yang, Qiang Wang, Xin Zhao, Yuanyuan Wang, Bin Chen, Chuan-Fan Ding   +8 more
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Sorption of ionizable organic compounds on HDTMA-modified loess soil

Science of The Total Environment, 2004
A natural loess soil was modified using a cationic surfactant, hexadecyltrimethylammonium (HDTMA) bromide. Sorption of ionizable organic compounds (IOCs), 2,4-dichlorophenol (DCP), p-nitroaniline (NA) and benzoic acid (BA), on the modified soil was determined under different pH conditions.
Hui, Chen, Wenjun, Zhou, Kun, Zhu, Huiying, Zhan, Mei, Jiang   +4 more
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Pyrolysis field ionization mass spectrometry of lignins, soil humic compounds and whole soil

Journal of Analytical and Applied Pyrolysis, 1985
Abstract Pyrolysis, followed by field ionization mass spectrometry (FI-MS) of lignins, revealed a regular pattern of phenolic products related to the building blocks of these compounds. The signals were found to be related to dimers of the respective lignin alcohols in addition to their methylated derivatives. However, overlapping was observed in the
Konrad Haider, Hans-Rolf Schulten
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