Results 261 to 270 of about 259,340 (309)

The comparative trial between magnetic induced polarization and electric induced polarization

SEG Technical Program Expanded Abstracts 2009, 2009
Summary Induced polarization is the main means in mineral exploration. Up to now the Electric Induced Polarization has been used widely. However, Electric Induced Polarization is difficult to exert the effect such as rubble, gobi desert, Permafrost, etc.
Pinrong Lin, Jianhua Li, Peng Guo, Yong Li   +3 more
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The Resistivity and Induced Polarization Methods

Symposium on the Application of Geophysics to Engineering and Environmental Problems 1988, 1988
An attempt is made in this article to provide a readable summary of the bases for and problems encountered with the resistivity and induced polarization methods in gencrat application. The article commences with a discussion of aqueous electrolytic conduction in rocks including consideration of the effects of temperature, rock texture, rock type ...
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Shock-Induced Polarization in Polar Materials

1979
Several authors [1–4] have shown that polar materials become polarized by the passage of an intense shock wave. The experimental arrangement is shown in Fig. 1. The polar material is the dielectric of a parallel-plate capacitor. An explosive charge is detonated next to one electrode and the shock transmitted into the dielectric causes a current to flow
M. De Icaza-Herrera, A. Migault, J. Jacquesson   +2 more
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Resistivity and Induced Polarization

2020
Resistivity and induced polarization methods are used for a wide range of near-surface applications, including hydrogeology, civil engineering and archaeology, as well as emerging applications in the agricultural and plant sciences. This comprehensive reference text covers both theory and practice of resistivity and induced polarization methods ...
Andrew Binley, Lee Slater
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Orthodeuterium induced polarization

Chemical Physics Letters, 1998
Abstract We present a theory and experimental results for the use of orthodeuterium to obtain dramatically enhanced NMR signals of the products of deuteration reactions. Orthodeuterium was enriched in solid nitrogen at 65 K, the deuterations however were carried out at ambient temperature and pressure.
J. Natterer, T. Greve, J. Bargon
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Flexoelectrically induced polarization in polar smectic films

Ferroelectrics, 2000
Abstract Phenomenological model of racemic ferroelectric and antiferroelectric liquid crystals, which considers both the tilt and the polarization order parameters explicitly, is presented. Free-standing films with few layers are analyzed within the model.
Mojca Čepič, Barbara Rovšek, Boštjan Žekš   +2 more
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A study in induced polarization

Geophysics, 1964
Abstract Induced polarization in pyritic sandstone arises in part from overvoltage effects and in part from electrolytic polarization. Because induced-polarization measurements are commonly used to search for sulfides, the electrolytic polarization is an undesirable background effect.
L. A. Anderson, G. V. Keller
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ATP induced polarization of keratohyalin granules

British Journal of Dermatology, 1980
Within seconds of exposure of frozen sections of stratum granulosum of glycerinized cow hoof to a buffered solution of adenosinetriphosphate, the keratohyalin granules underwent transformation into polarized fine linear rods. This polarization phenomenon was associated wtih gross pleating, twisting and crumpling of the section, indicative of varying ...
W B, Shelley, L, Juhlin
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On the Occurrence of Photo-Induced Polarization and Photo-Induced Depolarization

physica status solidi (a), 1982
The phenomena of photo-induced polarization (PIP) and photo-induced depolarization (PID) take place via electronic excited states (ees). It is assumed that the activation energy for the orientation of impurity-vacancy (IV) dipoles in ees is less than that required in the electronic ground state (egs).
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Polarity induced by chloramphenicol and relief by suA

Journal of Molecular Biology, 1971
Abstract The suA allele, known to relieve polarity in Escherichia coli, also relieves a unique polar effect on E. coli tryptophan operon messenger RNA produced by chloramphenicol.
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