Results 101 to 110 of about 7,348,255 (319)

Chain-like beams with phase singularity

, 2011
The investigation of the first order Bessel beam diffraction on a binary amplitude diffraction mask with two open zones has been performed. It has been shown by computer modeling and experimentally that the structure of the beam intensity distribution ...
Cherepko D.Yu., Alieva T., Popkov I.I., Kundikova N.D.   +3 more
core   +1 more source

Double topological phase singularities in highly absorbing ultra-thin film structures for ultrasensitive humidity sensing

Opto-Electronic Advances
Phase singularities (PSs) in topological darkness-based sensors have received significant attention in optical sensing due to their rapid, ultra-sensitive, and label-free detection capabilities.
Xiaowen Li, Jie Sheng, Zhengji Wen, Fangyuan Li, Xiran Huang, Mingqing Zhang, Yi Zhang, Duo Cao, Xi Shi, Feng Liu, Jiaming Hao   +10 more
doaj   +1 more source

Detecting phase singularities and rotor center trajectories based on the Hilbert transform of intraatrial electrograms in an atrial voxel model

Current Directions in Biomedical Engineering, 2015
This work aimed at the detection of rotor centers within the atrial cavity during atrial fibrillation on the basis of phase singularities. A voxel based method was established which employs the Hilbert transform and the phase of unipolar electrograms ...
Unger Laura Anna, Rottmann Markus, Seemann Gunnar, Dössel Olaf   +3 more
doaj   +1 more source

The calculation of the diffraction of the laser beams with a phase singularity on the micro-axicons with using high-performance computing

, 2014
We analyze the diffraction of the laser beam with a vortex phase singularity on the basis of the finite-difference time-domain method (FDTD). It is shown that, when incident beam has phase singularity, increase of the micro-axicon radius leads to ...
A. SavelyevD, N. KhoninaS.
semanticscholar   +1 more source

Phosphoinositides and inositol phosphates as molecular glues

FEBS Letters, EarlyView.
Inositol phosphates (IPs) and phosphoinositides (PIPs) regulate diverse eukaryotic processes. Beyond recruiting signaling proteins or acting as structural cofactors, recent studies suggest they mediate protein–protein interactions as natural molecular glues.
Aleshia Seaton‐Terry, Alexander J. Cutright, Mong Na Claire Loi, Jessica Martin, Joseph W. Gilligan, Jakub N. Kubina, Michael J. Arambula, Susanna Tanada Palmu, Daniella Zhou, Raymond D. Blind   +9 more
wiley   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Quantum escape of sudden future singularity

, 2004
We consider finite-time, future (sudden or Big Rip type) singularities which may occur even when strong energy condition is not violated but equation of state parameter is time-dependent. Recently, example of such singularity has been presented by Barrow,
Shin'ichi Nojiri, Nojiri, Shin'ichi, Sergei D. Odintsov, Odintsov, Sergei D.   +3 more
core   +1 more source

Susceptibility singularities at first-order phase transitions

Physical Review Letters, 1992
Problems associated with analyticity of thermodynamic functions close to first-order phase transitions are briefly reviewed. The bubble model for correlation functions is then applied to planar Ising-like models at subcritical temperatures (T<Tc) with a bulk magnetic field h. The fluctuation sum is used to calculate the susceptibility χ(h) from the
Abraham, D, Upton, P
openaire   +3 more sources

Design and analysis strategies for robust microbiome ageing research

FEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik, İsmail Güderer, Yi Wang, Tayyaba Alvi, Prasoon Pandey, Handan Melike Dönertaş   +5 more
wiley   +1 more source