Results 111 to 120 of about 52,331 (304)

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

A Deep Learning Approach to Denoise Optical Coherence Tomography Images of the Optic Nerve Head

, 2018
Purpose: To develop a deep learning approach to de-noise optical coherence tomography (OCT) B-scans of the optic nerve head (ONH). Methods: Volume scans consisting of 97 horizontal B-scans were acquired through the center of the ONH using a commercial ...
Aung, Tin, Devalla, Sripad Krishna, Girard, Michael J. A., Perera, Shamira, Pham, Tan Hung, Schmetterer, Leopold, Subramanian, Giridhar, Thiery, Alexandre H., Tun, Tin A., Wang, Xiaofei   +9 more
core   +1 more source

Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration

Advanced Materials, EarlyView.
A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang, Byeongseok Ryu, Sujeong Ahn, Junhyub Kim, Myeonghun Jang, Jeong Ho Cho, Won‐Gun Koh, Hyungsuk Lee   +7 more
wiley   +1 more source

Early detection of left ventricular dysfunction in patients with end-stage renal disease on hemodialysis by speckle-tracking echocardiography

Heart India
Background: In individuals with end-stage renal disease (ESRD) cardiovascular imaging modalities show a high prevalence of left ventricular hypertrophy (LVH), systolic/diastolic dysfunction and ventricular dilatation (dilated cardiomyopathy), which are ...
Saud Mohamed, Abdelaziz O. Mohamed, Mohamed G. Alsaady, Hala A. Mahmoud   +3 more
doaj   +1 more source

Role of speckle tracking echocardiography in detecting early left atrial dysfunction in hypertensive patients

The Egyptian Heart Journal, 2018
Background: Arterial hypertension adversely affects left atrial (LA) size and function, effect on function may precede effect on size. Many techniques were used to assess LA function but with pitfalls.
Bassam Hennawy, Wael El Kilany, Haitham Galal, Ahmed Mamdouh   +3 more
doaj   +1 more source

Imaging Gold Nanoparticles in Living Cells Environments using Heterodyne Digital Holographic Microscopy

, 2009
This paper describes an imaging microscopic technique based on heterodyne digital holography where subwavelength-sized gold colloids can be imaged in cell environment.
Absil, Atlan, Atlan, Atlan, Boyer, Carl, Charri’ere, Cognet, Colomb, Cuche, Di, El-Sayed, F. Joud, G. Tessier, Goldberg, Gross, Jain, Lasne, LeClerc, LeClerc, Leith, M. Abboud, M. Atlan, M. Coppey-Moisan, M. Gross, Mann, Mann, N. Warnasooriya, P. Bun, P. Desbiolles, Raschke, Schnars, Schnars, Yamaguchi, Yu   +34 more
core   +1 more source

Digital Microneedles for Multiplexed Transdermal Sensing via Fluorescent QR Codes

Advanced Materials, EarlyView.
Digital fluorescent microneedles encode biochemical information in skin into scannable QR codes through threshold‐activated probes that generate binary on/off signals. By transforming analog fluorescence into discrete digital patterns, this platform enables calibration‐free, multiplexed transdermal sensing of physiologically relevant biomarkers ...
Farbod Abazar, Shahrokh Vahabi, Elena Bellotti, Martina Corsi, Irene Nocera, Paola Orlandi, Guido Bocci, Giuseppe Barillaro   +7 more
wiley   +1 more source

Localized Temperature Monitoring in Mouse Brain during Light Delivery via a Non‐Planar Tapered Fiber‐Integrated µRTD Sensor

Advanced Materials, EarlyView.
We report a multifunctional tapered optical fiber integrating a conformal micro‐resistance temperature detector (µRTD) for local, real‐time thermometry during optical stimulation. The platform combines light‐delivery and temperature sensing within a minimally invasive footprint, enabling detection of sub‐degree cortical heating under representative ...
Antonio Balena, Marco Bianco, Barbara Spagnolo, Muhammad Fayyaz Kashif, Alberto Bramati, Massimo De Vittorio, Ferruccio Pisanello   +6 more
wiley   +1 more source

SUBCLINICAL SYSTOLIC DYSFUNCTION OF THE LEFT VENTRICLE IN PREECLAMPTIC WOMEN WITHOUT PROTEINURIA. THE POSSIBILITIES OF ECHOCARDIOGRAPHY IN EARLY DIAGNOSIS

Медицинский совет, 2017
The article presents the main pathophysiological mechanisms associated with the development of complications of pregnancy against the background of arterial hypertension in patients without clinical manifestations of left ventricular dysfunction, the ...
D. A. Doroshenko, A. R. Zubarev, O. B. Lapochkina   +2 more
doaj   +1 more source

Cardiac Mechanics Evaluated by Speckle Tracking Echocardiography

Arquivos Brasileiros de Cardiologia, 2014
Natural myocardial markers, or speckles, originated from constructive and destructive interference of ultrasound in the tissues may provide early diagnosis of myocardial changes and be used in the prediction of some cardiac events. Due to its relatively temporal stability, speckles can be tracked by dedicated software along the cardiac cycle, enabling ...
Abduch, Maria Cristina Donadio, Alencar, Adriano Mesquita, Mathias, Wilson, Vieira, Marcelo Luiz de Campos   +3 more
openaire   +2 more sources