Results 41 to 50 of about 86,685 (296)

Sharp focusing of linearly polarized asymmetric Bessel beam

Computer Optics, 2015
We conduct the numerical and experimental study of sharp focusing of a linearly polarized asymmetric Bessel beam with topological charge n = 3 and a crescent-shaped transverse intensity pattern. Using the Debye integral, we show that in the focal plane of a high NA aplanatic lens (NA = 0.9 – 0.95) the intensity distribution is also crescent-shaped ...
V. Kotlyar, S. Stafeev, A. Porfirev
openaire   +1 more source

Sharp-focusing Bragg–Fresnel zone plate with Laue diffraction geometry [PDF]

Journal of Synchrotron Radiation, 2006
The impact of decreased zone height on the focal properties of hard X-ray Bragg-Fresnel zone plates has been studied by numerical simulation. Decreased zone height allows for smaller zone widths and, although the efficiency of the lens is decreased, the signal-to-background ratio in the focal plane of the lens remains at a comparatively high level ...
Levon, Haroutunyan, Gayane, Hovhannisyan
openaire   +2 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Modulation of Homer1 EVH1 domain internal dynamics by putative autism‐associated mutations

FEBS Letters, EarlyView.
The putative autism‐associated M65I and S97L variants of the EVH1 domain of the postsynaptic scaffold protein Homer1 do not exhibit substantial changes in their overall structure or partner binding. Both of them, but especially the M65I variant, show altered internal dynamics relative to the wild‐type domain on the μs‐ms timescale, indicated by the ...
Fanni Farkas, Brigitta Maruzs, Zsófia E. Kálmán, Tomas Klumpler, Gyula Batta, Bálint Péterfia, Zoltán Gáspári   +6 more
wiley   +1 more source

High-resolution computer simulation of the dynamics of isoelectric focusing using carrier ampholytes: focusing with concurrent electrophoretic mobilization is an isotachophoretic process

, 2006
Focusing of four hemoglobins with concurrent electrophoretic mobilization was studied by computer simulation. A dynamic electrophoresis simulator was first used to provide a detailed description of focusing in a 100-carrier component, pH 6-8 gradient ...
Richard A. Mosher, Thormann, Wolfgang, Wolfgang Thormann, Mosher, Richard A   +3 more
core   +1 more source

Helicity of Poincaré beams at the sharp focus

Компьютерная оптика
In this study, helicity of Poincaré beams was considered from the point of view of the Richards-Wolf formalism. It was shown that helicity for Poincaré beams always has radial symmetry and does not depend on the azimuthal angle of the beam.
S.S. Stafeev, V.D. Zaitsev
doaj   +1 more source

Optical System Design of Oblique Airborne-Mapping Camera with Focusing Function

Photonics, 2022
The use of airborne-mapping technology plays a key role in the acquisition of large-scale basic geographic data information, especially in various important civil/military-mapping missions. However, most airborne-mapping cameras are limited by parameters,
Hongwei Zhang, Weining Chen, Yalin Ding, Rui Qu, Sansan Chang   +4 more
doaj   +1 more source

The ubiquitin‐proteasome system and autophagy as guardians of the cellular proteome

FEBS Letters, EarlyView.
This Perspective covers the three principles governing the crosstalk between the ubiquitin‐proteasome system and autophagy in cellular proteostasis: (1) a shared ubiquitin code routing substrates via shuttle factors or autophagy receptors; (2) spatial compartmentalization into phase‐separated degradation hubs and organelle‐specific modules (exemplified
Ivan Dikic
wiley   +1 more source

Absence of evidence is not evidence of absence: Perimortem skeletal sharp force trauma on postmortem CT [PDF]

, 2022
Responding to both modern research sharing requirements and ethical concerns, digital osteological databases are increasingly implemented across the world.
Lösch, Sandra, Indra, Lara, Braun, Sandra, Milella, Marco   +3 more
core  

Focusing a Vortex Laser Beam with Polarization Conversion

Photonics, 2021
We show that when strongly focusing a linearly polarized optical vortex with the topological charge 2 (or −2) in the near-focus region, there occurs not only a reverse energy flow (where the projection of the Poynting vector is negative) but the right ...
Victor V. Kotlyar, Anton G. Nalimov, Sergey S. Stafeev   +2 more
doaj   +1 more source