Results 121 to 130 of about 67,616 (299)

Focusing Based on Singular Eigenstates in Non-Hermitian Systems

Wavefront shaping methods by spatial light modulators, have been an invaluable tool for a plethora of applications in photonics of complex media [1]. In fact in a series of ground-breaking experiments, reverse propagation by phase conjugation was used to
Psaltis, Demetri, Makris, Konstantinos G.   +1 more
core   +1 more source

Spin-orbit conversion at the sharp focus of a circularly polarized light beam

Компьютерная оптика
It is known that when tightly focusing a circularly polarized optical vortex, spin-to-orbital angular momentum conversion occurs. It is usually said that the longitudinal component of the spin angular momentum (SAM) vector is transformed into the ...
V.V. Kotlyar, A.A. Kovalev, A.G. Nalimov, A.M. Telegin, S.S. Stafeev   +4 more
doaj   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

Gentle Dielectrophoretic Focusing of Yeast Cells in Curved Microchannels

, 2009
Focusing cells into a tight stream is usually a necessary step prior to counting, detecting and sorting them in, for example, microfluidic flow cytometers. We present herein a simple and gentle cell focusing technique in physiological solutions through a
Christopher Church, Xiangchun Xuan, Junjie Zhu, Gaoyan Wang, Tzuen-Rong Jeremy Tzeng   +4 more
core   +1 more source

Scanless two-photon excitation with temporal focusing

, 2020
International audienceTemporal focusing, with its ability to focus light in time, enables scan-less illumination of large surface areas at the sample with micrometer axial confinement and robust propagation through scattering tissue.
Papagiakoumou, Eirini, Eirini Papagiakoumou, Emiliano Ronzitti, Ronzitti, Emiliano, Emiliani, Valentina, Valentina Emiliani   +5 more
core   +1 more source

Biophysical approaches for studying viral entry

FEBS Letters, EarlyView.
Viruses infect all living organisms and have been responsible for major epidemics and pandemics. Their ongoing evolutionary battle with host defenses creates a constant need for improved tools to study viral behavior. Advancing methods to probe viral attachment, fusion, and genome release deepen our understanding of how infections begin and support the
Inbar Yosibash, Raya Sorkin
wiley   +1 more source

Septin 9 PB domains coordinate centrosome positioning and microtubule acetylation to control epithelial polarity

FEBS Letters, EarlyView.
Septin 9 polybasic domains couple phosphoinositide‐rich membrane binding to centrosome positioning, Golgi organization, and microtubule acetylation to control epithelial polarity. Their loss disrupts this axis, causing centrosome mispositioning, Golgi fragmentation, reduced microtubule acetylation, and polarity inversion via upregulation of the ...
Ting ting Cai, Mohyeddine Omrane, Nassima Benzoubir, Didier Samuel, Ama Gassama‐Diagne   +4 more
wiley   +1 more source

Spin and orbital Hall effects in the tight focus of coaxial superposition of two cylindrical vector beams of different-parity orders

Компьютерная оптика
We study tight focusing of coaxial superposition of two cylindrical vector beams (CVB) of different orders. In the initial plane, the polarization singularity index of such superposition equals the half-sum of the orders of the two constituent CVBs. Such
V.V. Kotlyar, A.A. Kovalev, S.S. Stafeev, A.M. Telegin   +3 more
doaj   +1 more source

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

FEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto, Masatomo So, Ayako Furukawa, Kenji Sugase   +3 more
wiley   +1 more source

Focusing a cylindrical vector beam and the Hall effect

Компьютерная оптика
Polarization of a higher-order cylindrical vector beam (CVB) is known to be locally linear. The higher the beam order, the larger number of full circles the local linear polarization vector makes around the optical axis.
V.V. Kotlyar, S.S. Stafeev , A.A. Kovalev, V.D. Zaitsev   +3 more
doaj   +1 more source