Results 41 to 50 of about 4,265 (180)

Rotational Anisotropy Raman Spectrometer for High‐Sensitivity Crystallographic Symmetry Analysis

Laser &Photonics Reviews, EarlyView.
We introduce rotational‐anisotropy Raman spectroscopy, an enhanced scheme that overcomes the limitations of traditional polarization‐resolved Raman techniques. This method reveals previously inaccessible phonon symmetries and resolves directional anisotropy of phonon‐polaritons in benchmark crystals, establishing a powerful new tool for characterizing ...
Di Cheng, Junxiang Li, Shizhuo Luo, Zehao Chen, Xinwei Li   +4 more
wiley   +1 more source

Stokes‐Based 3D Polarimetric Analysis of Dipolar Near‐Fields

Advanced Photonics Research, Volume 7, Issue 8, August 2026.
Characterizing the near‐field polarization of dipolar emitters is of growing importance in nanophotonics, since many subwavelength systems resemble their emission. In this work, we apply the 3D Stokes formalism and its intrinsic reference frame to analyze the polarization properties of various dipole emitters from the near‐ to the far‐field, allowing a
Guillermo Serrera, Yael Gutiérrez, José J. Gil, Fernando Moreno   +3 more
wiley   +1 more source

Oil-Spill-Response-Oriented Information Products Derived From a Rapid-Repeat Time Series of SAR Images

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
New quantitative and semiautomated methods for analyzing oil slick evolution using a time series of L-band synthetic aperture radar (SAR) images with short repeat time are developed and explored. In this study, two methods that are complementary in terms
Martine M. Espeseth, Cathleen E. Jones, Benjamin Holt, Camilla Brekke, Stine Skrunes   +4 more
doaj   +1 more source

Helically Flexible Boron‐Dipyrromethenes for Solution‐Processed Isotropic Films With Preserved Chiral Exciton Coupling

Aggregate, Volume 7, Issue 8, August 2026.
Accessible and chiroptically tunable helically chiral boron‐dipyrromethene dimer dyes enable the fabrication of solution‐processed isotropic neat thin films that retain sharp visible electronic circular dichroism signatures from solution. This platform establishes a direct molecule‐to‐material relationship and provides a robust foundation for the ...
Carolina Díaz‐Norambuena, Juan Manuel Moreno‐Naranjo, David Reger, Giuliano Siligardi, César Ray, Jessica Colligan, Florencio Moreno, Beatriz L. Maroto, Gilles Muller, Jorge Bañuelos, Matthew J. Fuchter, Santiago de la Moya   +11 more
wiley   +1 more source

A Comparative Study of the Influence of Water and Temperature on the Racemization of Five‐ and Six‐Membered l‐Alanine‐Derived Imides

Chirality, Volume 38, Issue 8, August 2026.
Racemization of chiral imides in dimethylformamide is shown to increase with increasing water content and temperature. The six‐membered imide ring system is more stable than the five‐membered analogue, with slower racemization under identical conditions and an absence of competing side reactions.
Diksha U. Sawant, William Chant, Peter Halat, Ekaterina I. Izgorodina, David R. Turner   +4 more
wiley   +1 more source

Design, Synthesis, and Biological Evaluation of Chiral Urea and Thiourea Derivatives as Multitarget‐Directed Anti‐Alzheimer Agents

Drug Development Research, Volume 87, Issue 5, August 2026.
ABSTRACT A series of novel chiral urea and thiourea compounds were designed as multitarget‐directed ligands for Alzheimer's disease and evaluated against hAChE, hBChE, and hMAO‐B, with exploratory assessment of HSD10. These chiral compounds were synthesized and fully characterized, and their enantiopurity was confirmed via HPLC.
Sule Erol Gunal, Senel Teke Tuncel, İlke Demir, İpek Baysal, Gökçen Telli, Safiye Sag Erdem, Gulberk Ucar, Michaela Hanzlova, Kamil Musilek, İlknur Dogan, Nesrin Gokhan Kelekci   +10 more
wiley   +1 more source

Unlocking the Future of X-Ray Polarimetry with IXPE: Lessons Learned and Next Steps

Particles
This paper discusses issues encountered during the early development of the instrument on the Imaging X-ray Polarimetry Explorer (IXPE), a NASA–ASI Small Explorer mission launched on 9 December 2021.
Paolo Soffitta, Enrico Costa, Ettore Del Monte, Alessandro Di Marco, Sergio Fabiani, Riccardo Ferrazzoli, Fabio La Monaca, Fabio Muleri, Alda Rubini, Alessio Trois   +9 more
doaj   +1 more source

Identifying Venous Insufficiency in Head and Neck Reconstruction Flaps Using Machine Learning and Deep Learning Methods

Head &Neck, Volume 48, Issue 8, Page 2190-2198, August 2026.
ABSTRACT Background Venous insufficiency is a major cause of flap failure in head and neck reconstruction. AI provides a reliable, convenient solution for early detection. Methods Clinical data and postoperative flap photos of head and neck cancer patients (2018–2024) at our center were retrospectively collected, categorized into normal and venous ...
Yurong He, Jugao Fang, Lizhen Hou, Zufei Li, Shizhi He, Yanming Zhao, Qijia Li, Rongjia Li, Xiaoyu Shi, Jiayi Yang, Qi Zhong   +10 more
wiley   +1 more source

Salix daphnoides: A Screening for Oligomeric and Polymeric Proanthocyanidins

Molecules, 2015
In the present study, a qualitative analysis of proanthocyanidins (PAs) from an aqueous-methanolic extract of Salix daphnoides VILL. bark is described. Procyanidin B1 (1), B2 (2), B3 (3), B4 (4), C1 (5), epicatechin-(4β→8)-epicatechin-(4β→8)-catechin (6)
Stefan Wiesneth, Frank Petereit, Guido Jürgenliemk   +2 more
doaj   +1 more source

Planar Chiral Nanoantenna for Excitation‐Chirality‐Controlled Hot Spot Modulation and Emitter‐Coupled Circularly Polarized Emission

Nanophotonics, Volume 15, Issue 14, 27 July 2026.
A planar chiral plasmonic nanoantenna is shown to translate the changing handedness of circularly polarized excitation into deterministic switching of a nanoscale hot spot with maximal dissymmetry and complete modulation depth. Coupling an achiral quantum emitter to the nanogap simultaneously enables circularly polarized emission of near‐maximal purity,
Abhik Chakraborty, Xiaofei Wu, Ankit Kumar Singh, Fabian Scheidler, Min Jiang, Jürgen Popp, Bert Hecht, Jer‐Shing Huang   +7 more
wiley   +1 more source