Results 51 to 60 of about 1,344,359 (296)

Three-Dimensional Exploding Light Wave Packets

Photonics
We describe a family of paraxial and quasi-monochromatic optical wave packets with finite energy and smoothly shaped amplitude in space and time that develops a singularity in the intensity when spatio-temporally focused by imparting a converging ...
Marcos G. Barriopedro, Manuel Holguín, Pablo de Lara-Montoya, Nilo Mata-Cervera, Miguel A. Porras   +4 more
doaj   +1 more source

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

FEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell, Thomas Walther, Egbert Hoiczyk   +2 more
wiley   +1 more source

Astigmatism-controlled beam shaping for high-quality fibre Bragg grating inscription using femtosecond laser [PDF]

We present an astigmatism-controlled beam-shaping technique for femtosecond laser inscription of FBGs, optimizing beam profiles using a cylindrical lens to mitigate focal distortion and enhance grating quality.
Zhou, Kaiming, Ma, Yuehui, Kamarudin, Lukman, Li, Jiaxuan, Sun, Bing   +4 more
core   +1 more source

High Efficient Metadevices for Terahertz Beam Shaping

Frontiers in Physics, 2021
Metasurfaces supply a planar approach for flexible wavefront manipulation, thus facilitating the integration and minimization of optical elements, especially in the terahertz (THz) range. High efficient THz metadevices are highly pursued at present. Here,
Xinan Li, Zhixiong Shen, Qinggui Tan, Wei Hu   +3 more
doaj   +1 more source

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

Coherent-synchrotron-radiation-free longitudinal shaping of a high-charge electron bunch based on velocity modulation

Physical Review Accelerators and Beams
Beam-driven plasma wakefield acceleration (PWFA) is a promising technique to generate high-energy electron bunches for future electron-positron colliders.
Zhi Song, Shiyu Zhou, Jianfei Hua, Yingchao Du, Fei Li, Bo Peng, Wei Lu, Zhen Wang   +7 more
doaj   +1 more source

An Advanced Beamforming Mechanism Based on Programmable Plasma Prisms

IEEE Access
This paper examines the feasibility of a novel programmable beam-shaping mechanism based on plasma prisms for advanced beamforming applications. The proposed mechanism offers versatile control over the direction, width, and splitting of electromagnetic ...
Fatemeh Sadeghikia, Kazem Zafari, Mohamed Himdi, Mahmoud T. Noghani, Ali Karami Horestani   +4 more
doaj   +1 more source

Raman‐based label‐free microscopic analysis of the pancreas in living zebrafish larvae

FEBS Open Bio, EarlyView.
Forward stimulated Raman scattering (F‐SRS) and epi coherent anti‐Stokes Raman scattering (E‐CARS) allow label‐free discrimination of distinct subcellular structures in the pancreas of living zebrafish larvae. Given the straightforward applicability, we anticipate broad implementation of Raman microscopy in other organs and across various biomedical ...
Noura Faraj, Eline M. F. de Lange, Klaas A. Sjollema, Ben N. G. Giepmans   +3 more
wiley   +1 more source

Beyond the IFTA – Phase mask generation for 3D laser beam shaping, tailored temperature distributions and optical amplifiers

Journal of the European Optical Society-Rapid Publications
The iterative Fourier transform algorithm (IFTA) is the most widely used algorithm for the generation of phase masks for laser beam shaping in the field of laser material processing. But its simplicity and efficiency also come with heavy limitations.
Hofmann Oskar, Buske Paul, Kurth Robin, Bonhoff Annika, Holly Carlo   +4 more
doaj   +1 more source

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