Results 41 to 50 of about 655,319 (295)

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Design of high-performance millimeter wave and sub-millimeter wave quasi-optical isolators and circulators [PDF]

, 2007
Faraday rotators using permanently magnetized ferrite materials are used to make quasi-optical isolators and circulators at millimeter wave and sub-millimeter wave frequencies that have far higher performance than their waveguide equivalents.
Goy, P, Graham M. Smith, Robertson, Duncan Alexander, Philippe Goy, Duncan A. Robertson, Hunter, Robert Iain, Smith, Graham Murray, Robert I. Hunter   +7 more
core   +2 more sources

Maximising the utility of enterprise millimetre-wave networks [PDF]

Computer Communications, 2018
Millimetre-wave (mmWave) technology is a promising candidate for meeting the intensifying demand for ultra fast wireless connectivity, especially in high-end enterprise networks. Very narrow beam forming is mandatory to mitigate the severe attenuation specific to the extremely high frequency (EHF) bands exploited.
Nicolò Facchi, Francesco Gringoli, Paul Patras   +2 more
openaire   +5 more sources

Extracellular matrix remodeling and immune reprogramming drive residual tumor progression of liver cancer after incomplete microwave ablation

Molecular Oncology, EarlyView.
Incomplete microwave ablation (iMWA) of liver cancer triggers a biphasic progression in residual tumors. At Day 3, the microenvironment is characterized by acute inflammatory responses and extracellular matrix (ECM) remodeling. By Day 14, a profound shift occurs toward oncogenic signal transduction and immunosuppression, marked by macrophage ...
Yu Liu, Yubei He, Nikolaus Berndt, Michael Mülleder, Kathrin Textoris‐Taube, Jing Guo, Matthias Stechele, Justus Ramtke, Shraga Nahum Goldberg, Lynn Jeanette Savic   +9 more
wiley   +1 more source

Modelling of reconfigurable terahertz integrated architecture (RETINA) SIW structures [PDF]

, 2010
23.04.13 KB. Published version ok to add to spiral. PIER emailThis paper discusses for the first time the combined optoelectronic-electromagnetic modelling of a new technology that represents a paradigm shift in the way millimetre-wave and terahertz ...
Stepan Lucyszyn, Lucyszyn, S, Yun Zhou, Zhou, Y   +3 more
core   +1 more source

Closed-Form Power Normalization Methods for a Satellite MIMO System

Sensors, 2022
The paper proposes a new set of normalization techniques for precoding/beamforming matrices applicable to broadband multiuser multiple-input multiple-output (MIMO) satellite systems.
Andrea Segneri, Alejandro Baldominos, George Goussetis, Alberto Mengali, Nelson J. G. Fonseca   +4 more
doaj   +1 more source

Millimetre-wave diffraction phenomena [PDF]

Millimetre-wave diffraction phenomena
This paper will review a range of interesting diffraction phenomena that have been investigated experimentally at millimetre wavelengths. They include: (1) Beams with phase singularities and how they may be generated using strip gratings and blazed gratings with defects and offset Fresnel-type lens antennas.
Brand, G.F
openaire   +2 more sources

Effect of terahertz irradiation on DNA damage repair in living cells

FEBS Open Bio, EarlyView.
We investigated the effect of terahertz (THz) wave irradiation on DNA double‐strand break (DSB) repair in living cells. We found that THz irradiation enhanced DSB repair at specific frequencies, whereas heat treatment inhibited it, indicating that this effect is nonthermal and frequency‐specific.
Yuya Ueno, Shota Yamazaki, Hiromichi Hoshina, Masahiko Harata   +3 more
wiley   +1 more source

Control of the Radiation Patterns Using Homogeneous and Isotropic Impedance Metasurface

International Journal of Antennas and Propagation, 2015
We propose to control the radiation patterns of a two-dimensional (2D) point source by using impedance metasurfaces. We show that the radiation patterns can be manipulated by altering the surface impedance of the metasurface. Full-wave simulation results
Fan Yang, Zhong Lei Mei, Tie Jun Cui
doaj   +1 more source

Importin 7 mediates the nuclear import of HIV‐1 integrase via a specific interacting interface

FEBS Open Bio, EarlyView.
HIV‐1 integrase enables viral DNA integration into the host genome. By binding to the core domain of the host protein Importin 7 via its C‐terminal domain, the integrase is transported across the nuclear membrane into the nucleus, where integration of the viral genome into host DNA takes place. This translocation is a critical step for subsequent viral
Juana Bana, Avigail Yariv, Tal Oppenheim, Hadar Amartely, Dana Reichmann, Oded Livnah   +5 more
wiley   +1 more source