Results 291 to 300 of about 1,799,934 (343)
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pH Gradient Reversed-Phase HPLC
Analytical Chemistry, 2003pH gradient HPLC is reported, which is a new original mode of reversed-phase high-performance liquid chromatography applicable to ionogenic analytes. The method consists of programmed increase during the chromatographic run of the eluting strength of the mobile phase with respect to the acid/base analytes separated.
Roman, Kaliszan +2 more
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High quality factor phase gradient metasurfaces
Nature Nanotechnology, 2020Dielectric microcavities with quality factors (Q-factors) in the thousands to billions markedly enhance light-matter interactions, with applications spanning high-efficiency on-chip lasing, frequency comb generation and modulation and sensitive molecular detection.
Mark Lawrence +6 more
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Ghost phase cancellation with phase‐encoding gradient modulation
Journal of Magnetic Resonance Imaging, 1993AbstractMotion artifacts are a dominant cause of magnetic resonance image quality degradation. Periodic or nearly periodic motion results in image replicates of the moving structures in spin‐warp Fourier imaging. The replicates, or ghosts, propagate in the image in the phase encoding, or y, direction.
R S, Hinks, Q S, Xiang, R M, Henkelman
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Plasmonic Phase-Gradient Image Sensors
CLEO 2023, 2023We report plasmonic metasurface photodetectors featuring a strong asymmetric angular response around normal incidence that can visualize transparent phase objects with high sensitivity in a simple and compact imaging setup.
Jianing Liu +4 more
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Polarimetric phase gradient autofocus
2007 IEEE International Geoscience and Remote Sensing Symposium, 2007In the past decade the use of fully polarimetric SAR (polSAR) systems has increased significantly due to their effectiveness in target classification and detection applications. While polSAR imagery has been extensively used to distinguish between different scattering mechanisms in a scene, there has been a lack of research in the exploitation of ...
MARTORELLA, MARCO +3 more
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Stripmap phase gradient autofocus
Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492), 2003Current sonar autofocus techniques for blur removal originate in the radar community but have not provided a complete solution for Synthetic Aperture Sonar (SAS) imagery. The wide-beam, wide-band nature of SAS imagery makes implementation of Synthetic Aperture Radar (SAR) autofocus techniques difficult.
H.J. Callow, M.P. Hayes, P.T. Gough
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Improved reversed-phase gradient retention modeling
Journal of Chromatography A, 2010An empirical nonlinear equation is used to describe the relationship between chromatographic retention and solvent composition in both isocratic and gradient chromatography. The integration of the gradient equation can be solved with our equation, allowing a simple transition between isocratic and gradient conditions.
Uwe Dieter, Neue, Hans-Joachim, Kuss
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