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Passive highly dispersive matching network enabling broadband electromagnetic absorption.
Nat Commun
January 2025
Department of Electrical Engineering and Computer Science, Syracuse University, Syracuse, NY, USA.
In numerous applications from radio to optical frequencies including stealth and energy harvesting, there is a need to design electrically thin layers capable of perfectly absorbing electromagnetic waves over a wide bandwidth. However, a theoretical upper bound exists on the bandwidth-to-thickness ratio of metal-backed, passive, linear, and time-invariant absorbing layers. Absorbers developed to date, irrespective of their operational frequency range or material thickness, significantly underperform when compared to this upper bound, failing to exploit the full potential that passive, linear, and time-invariant systems can provide.
View Article and Find Full Text PDFA Validated Method for Identification and Quantification of Anthocyanins in Different Black Rice (Oryza sativa L.) Varieties Using High-Performance Thin-Layer Chromatography (HPTLC).
Phytochem Anal
January 2025
BRIC-Institute of Bioresources and Sustainable Development (IBSD), Department of Biotechnology (DBT), Govt. of India, Takyelpat, Imphal, Manipur, India.
Introduction: Black rice (Oryza sativa L.) has gained prominence as a functional food because of its rich content of anthocyanins and polyphenols, offering potential health benefits. However, comprehensive research addressing the diverse anthocyanin compositions in black rice cultivars remains limited.
View Article and Find Full Text PDFSensitivity of Lamb waves in viscoelastic polymer plates to surface contamination.
Ultrasonics
January 2025
Institut Langevin, ESPCI Paris, Université PSL, CNRS, 1 rue Jussieu, Paris, 75005, France.
Detecting surface contamination on thin thermoformed polymer plates is a critical issue for various industrial applications. Lamb waves offer a promising solution, though their effectiveness is challenged by the strong attenuation and anisotropy of the polymer plates. This issue is addressed in the context of a calcium carbonate (CaCO) layer deposited on a polypropylene (PP) plate.
View Article and Find Full Text PDFTopographic Analysis of the Periorbital Region Including Orbicularis Oculi Muscle Based on Ultrasonography Interpretation.
J Cosmet Dermatol
January 2025
Division in Anatomy and Developmental Biology, Department of Oral Biology, Human Identification Research Institute, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, South Korea.
Objective: Ultrasonographic examination is easy, fast, safe, and used in various fields; however, its application to the facial area has been limited. Complex anatomical structures are mixed within thin, soft tissues in the facial region; therefore, understanding their structural characteristics is crucial. This study aimed to use ultrasonography to obtain information on the layered structure and soft tissue thickness of the eye area around the orbicularis oculi muscle and provide guidance for clinical practice.
View Article and Find Full Text PDFSurface characteristics and molecular interactions of thin films between bubbles by molecular simulations.
Front Chem
January 2025
Jiangxi Copper Technology Institute Co., Ltd, Nanchang, Jiangxi, China.
Introduction: Whether in industrial production or daily life, froth plays an important role in many processes. Sometimes, froth exists as a necessity and is also regarded as the typical characteristic of products, e.g.
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