Results 11 to 20 of about 91,586 (302)

Ionization constants of a soil fulvic acid [PDF]

Analusis, 1999
In the study of acid-base reactions the non-electrostatic models do not consider the charge over the fulvic acid (FA) molecule. In the present work we used the discrete site model which considers the acidic groups as independent sites without interactions. The effect of the electric charge is assumed negligible or constant.
A. Ramos, S. López, R. López, S. Fiol, F. Arce, J. M. Antelo   +5 more
openaire   +1 more source

Characterisation of the semi-volatile component of Dissolved Organic Matter by Thermal Desorption – Proton Transfer Reaction – Mass Spectrometry [PDF]

, 2017
Proton Transfer Reaction – Mass Spectrometry (PTR-MS) is a sensitive, soft ionisation method suitable for qualitative and quantitative analysis of volatile and semi-volatile organic vapours. PTR-MS is used for various environmental applications including
Cook, Sarah, Gauci, Vincent, Holzinger, Rupert, Kent, Matthew, Materić, Dušan, Peacock, Michael, Rockman, Thomas   +6 more
core   +10 more sources

Grounding System Modeling and Evaluation Using Integrated Circuit Based Fast Relaxed Vector Fitting Approach, Considering Soil Ionization

Applied Sciences, 2020
Since high voltage transmission line towers or wind turbines structures are installed in high-altitude areas, it is essential to achieve a high overvoltage protection system against direct and indirect lightning strikes collisions.
Maziyar Fakhraei, Mehrdad Mahmoudian, Eduardo Manuel Godinho Rodrigues   +2 more
doaj   +1 more source

Direct Imaging of Plant Metabolites in the Rhizosphere Using Laser Desorption Ionization Ultra-High Resolution Mass Spectrometry

Frontiers in Plant Science, 2021
The interplay of rhizosphere components such as root exudates, microbes, and minerals results in small-scale gradients of organic molecules in the soil around roots.
Martin Lohse, Rebecca Haag, Rebecca Haag, Eva Lippold, Doris Vetterlein, Doris Vetterlein, Thorsten Reemtsma, Thorsten Reemtsma, Oliver J. Lechtenfeld, Oliver J. Lechtenfeld   +9 more
doaj   +1 more source

Validity of Improved MTL for Effective Length of Counterpoise Wires under Low and High-Valued Lightning Currents

Advanced Electromagnetics, 2020
In this paper, an efficient modeling approach called improved MTL is used to predict effective length of counterpoise wires considering both ionization and dispersion of soils. This paper consists of two parts.
S. R. Ostadzadeh
doaj   +1 more source

Soil concentrations of Polychlorinated Biphenyl in a typical Nigerian University environment and its risk assessment

Case Studies in Chemical and Environmental Engineering, 2023
In this study, concentration of Polychlorinated Biphenyl (PCBs) around a university environment was investigated. The study further assessed the risk assessment associated with human contact with the soil using health indexes such as Hazard Quotient (HQ)
Olusola Adedayo Adesina, Ifesinachi Ezengwa, Khadijat Abdulkareem Abdulraheem, Adesanmi J. Adewole, Okedere B. Oyetunji   +4 more
doaj   +1 more source

Rapid Multi-Residue Method for Simultaneous Determination of 1,3,5-Triazine Herbicides in Environmental Samples by Capillary GC-MS-EI Selective Ion Monitoring Method

Separations, 2023
A new multi-residue method using gas chromatography–mass spectrometry electron ionization selective ion monitoring mode (SIM) has been developed for the simultaneous determination of eight 1,3,5-triazine herbicides such as 1,3,5-triazine-2,4-diamine ...
Perumal E. Ravi, Perumal E. Thirugnanam, Jothi Ramalingam Rajabathar, Hamad Al-Lohedan, S. Jenifer, Muthusamy Karnan   +5 more
doaj   +1 more source

Evaluating the High Frequency Behavior of the Modified Grounding Scheme in Wind Farms

Applied Sciences, 2017
Wind generators are exposed to numerous destructive forces such as lightning and are therefore vulnerable to these phenomena. To evaluate the transient behavior of a wind power plant during direct and indirect strikes, modeling of all relevant components
Seyede Fatemeh Hajeforosh, Zahra Pooranian, Ali Shabani, Mauro Conti   +3 more
doaj   +1 more source

Transient impedance of grounding system with impulse superimposed sinewave

ENP Engineering Science Journal, 2021
Investigating the transient performance of grounding systems subject to lightning (impulse or impulse superimposed sinewave) is valuable for protecting the power system and maintaining the system operation.
Sherif Ghoneim, Ahdab Elmorshedy, Rabah Amer   +2 more
doaj   +1 more source

Applications of plasma-liquid systems : a review [PDF]

, 2019
Plasma-liquid systems have attracted increasing attention in recent years, owing to their high potential in material processing and nanoscience, environmental remediation, sterilization, biomedicine, and food applications.
De Geyter, Nathalie, Morent, Rino, Nikiforov, Anton, Rezaei, Fatemeh, Vanraes, Patrick   +4 more
core   +1 more source