Results 251 to 260 of about 435,658 (283)
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Insight into planar cell polarity
Experimental Cell Research, 2014Planar cell polarity or PCP refers to a uniform cellular organization within the plan, typically orthogonal to the apico-basal polarity axis. As such, PCP provides directional cues that control and coordinate the integration of cells in tissues to build a living organism. Although dysfunctions of this fundamental cellular process have been convincingly
Michael, Sebbagh, Jean-Paul, Borg
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Polarization-Dependent Amplification in Planar Waveguides
Conference on Lasers and Electro-Optics Europe, 1996We model a planar waveguide with an anisotropic active layer (i.e. with permittivity ϵ. a tensor) by using a scattering approach. The anisotropy of the permittivity can e.g. arise through the presence of strained quantum wells. It is calculated how much anisotropy is needed to get. a gain that is polarisation-independent.
Visser, T.D., Lenstra, D., Blok, H.P.
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Planar polarity and short-range polarization in Drosophila embryos
Seminars in Cell & Developmental Biology, 2009Planar cell polarity is a common and probably universal feature of epithelial cells throughout their life. It is not only visible in the external parts of adult animals and plants, but also present in newborn cells such as in the primary Drosophila epithelium.
Bertet, Claire, Lecuit, Thomas
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Planar silicon-based light polarizers
Optics Letters, 2004Silicon-based thin-film polarizers operating in the visible and near-infraed spectral range are fabricated by electrochemical etching of bulk silicon wafers. Anisotropically etched (110) porous silicon layers exhibit a strong in-plane anisotropy of the refractive index.
J, Diener +4 more
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Fidelity in planar cell polarity signalling
Nature, 2003The polarity of Drosophila wing hairs displays remarkable fidelity. Each of the approximately 30,000 wing epithelial cells constructs an actin-rich prehair that protrudes from its distal vertex and points distally. The distal location and orientation of the hairs is virtually error free, thus forming a nearly perfect parallel array.
Dali, Ma +4 more
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Planar cell polarity and vertebrate organogenesis
Seminars in Cell & Developmental Biology, 2006In addition to being polarized along their apical/basal axis, cells composing most (if not all) organs are also polarized in a plane vertical to the A/B axis. Recent studies indicate that this so-called planar cell polarity (PCP) plays an essential role in the formation of multiple organ systems regulating directed cell migrations, polarized cell ...
Courtney, Karner +2 more
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Journal of Geometry, 2001
A linear space is a pair \((\mathcal S,\mathcal L)\), where \(\mathcal S\) is a set of points and \(\mathcal L\) is a set of subsets of \(\mathcal S\), called lines, such that any line contains at least two points and any two distinct points lie on exactly one line.
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A linear space is a pair \((\mathcal S,\mathcal L)\), where \(\mathcal S\) is a set of points and \(\mathcal L\) is a set of subsets of \(\mathcal S\), called lines, such that any line contains at least two points and any two distinct points lie on exactly one line.
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Planar photonic crystal polarization splitter
Optics Letters, 2004The differential dispersion relation for the E and H modes (TM-like and TE-like, respectively) in planar photonic crystals is used to control the polarization-dependent propagation of light. E- and H-polarized beams were separated by 10 degrees after propagating through a 20-microm-long planar photonic crystal in the wavelength range from 1250 to 1300 ...
Wu, LJ +5 more
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Polarization switching in a planar optical waveguide
Physical Review E, 2003The multiscale expansion formalism is applied to the study of nonlinear planar optical waveguides. It allows us to describe the linear and nonlinear propagation for both transverse electric and transverse magnetic modes, and the interaction between them.
V, Boucher, H, Leblond, X, Nguyen-Phu
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Polarity and Structure of Silatranes with Planar Fragments
Phosphorus, Sulfur, and Silicon and the Related Elements, 2009The structure of silatranes N[CH2(RMeC6H2)O]3SiR1 with planar fragments in six-membered semi-rings was established by the methods of dipole moments and density functional theory calculations. They are endo-structures with transannular interaction N→Si in which the oxygen atoms located adjacent to the silicon participate besides the nitrogen and silicon
Ishmaeva E. +6 more
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