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Papillary renal neoplasm with reversed polarity: A case report of a rare renal tumor. [PDF]
Int J Surg Case RepKannan S +3 more
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Reversing Polarity: Carbonyl α‐Aminations with Nitrogen Nucleophiles
Angewandte Chemie International Edition, 2017AbstractThe synthesis of α‐amino carbonyl compounds is an important challenge in synthesis en route to biologically essential structures. While classical approaches involve the use of enol or enolate chemistries in combination with an electrophilic source of nitrogen, those strategies usually necessitate further transformations to reach the desired ...
Aurélien de la Torre +2 more
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Polarization reversal in crystals
Journal of Physics D: Applied Physics, 1997Characteristics of spontaneous polarization reversal have been studied in detail for the first time in crystals subjected to a pulsed electric field in the range 15 - 70 kV . The switching process has been observed by recording a transient switching current and subsequent piezoelectric probe mapping and optical and secondary electron microscopy methods.
G Rosenman, A Skliar, M Oron, M Katz
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Polarity reversal in hydra by oligomycin
Development, 1975ABSTRACT Intact hydra treated for 24 h with oligomycin gradually lose their head structures and the distal ends form feet. Grafting experiments show that the distal ends of treated animals induce proximal structures.
A, Hornbruch, L, Wolpert
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Stochastic Resonance in Geomagnetic Polarity Reversals
Physical Review Letters, 2003Among noise-induced cooperative phenomena a peculiar relevance is played by stochastic resonance. In this paper we offer evidence that geomagnetic polarity reversals may be due to a stochastic resonance process. In detail, analyzing the distribution function P(tau) of polarity residence times (chrons), we found the evidence of a stochastic ...
Consolini G., De Michelis P.
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Polarization Reversal of Solar Microwave Bursts
Nature, 1970Solar microwave bursts polarization reversal mechanism, considering radiating electrons gyrosynchrotron ...
R, Ramaty, S S, Holt
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Polarity Reversal in Nerve-Free Hydra
Science, 1977Hydra experimentally depleted of all nerve cells and nerve stem cells (interstitial cells) demonstrate normal polarity reversal. Thus hydra epithelial cells are capable of controlling complex developmental patterning phenomena.
B A, Marcum, R D, Campbell, J, Romero
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Reversing cell polarity: evidence and hypothesis
Current Opinion in Microbiology, 2005The long, rod-shaped cells of myxobacteria are polarized by their gliding engines. At the rear, A-engines push while pili pull the front end forward. An hypothesis is developed whereby both engines are partially dis-assembled, then re-assembled at the opposite pole when cells reverse their movement direction.
Dale, Kaiser, Rosa, Yu
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Reversible Polarization Control of Single Photon Emission
Nano Letters, 2008We present reversible and a-priori control of the polarization of a photon emitted by a single molecule by introducing a nanoscale metal object in its near field. It is experimentally shown that, with the metal close to the emitter, the polarization ratio of the emission can be varied by a factor of 2.
Moerland, R.J. +4 more
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