Results 81 to 90 of about 423,465 (288)

Diffuse Gamma-ray Emission from the Galactic Center - A Multiple Energy Injection Model [PDF]

, 1997
We suggest that the energy source of the observed diffuse gamma-ray emission from the direction of the Galactic center is the Galactic black hole Sgr A*, which becomes active when a star is captured at a rate of $\sim 10^{-5} $ yr^{-1}.
Kuulkers, E., Lamb, F. K., Lewin, W. H. G., Mendez, M., Psaltis, D., van der Klis, M., van Paradijs, J., Vaughan, B. A.   +7 more
core   +7 more sources

From Clinic to Computation: Multiscale Bioengineering Strategies for Durable Biological Aortic Valve Replacements

Advanced Functional Materials, EarlyView.
Bioprosthetic aortic valves have revolutionized the treatment of aortic stenosis, but their durability is limited by structural valve deterioration (SVD). This review focuses on the pericardial tissue at the heart of these valves, examining how its mechanical properties and calcification drive fatigue and failure.
Gabriele Greco, Pierfrancesco Gaziano, Serena Anglese, Simone Morganti, Carlo de Vincentiis, Ferdinando Auricchio, Michele Marino, Michele Conti   +7 more
wiley   +1 more source

Review of Positron Emission Tomography at Royal Prince Alfred Hospital, CHERE Project Report No 18 [PDF]

This report is a review of the clinical uses, impacts on clinical management, clinical outcome and resource use of Positron Emission Tomography (PET) at Royal Prince Alfred Hospital (RPAH).Positron emission ...
Anastasia Lowin, Christine Pollicino, Michael Fulham, Phil Haywood, Rosalie viney   +4 more
core  

Positronium signature in organic liquid scintillators for neutrino experiments

, 2011
Electron anti-neutrinos are commonly detected in liquid scintillator experiments via inverse beta decay, by looking at the coincidence between the reaction products, neutron and positron. Prior to positron annihilation, an electron-positron pair may form
B. Zgardzinska, D. Franco, D. Trezzi, E. Gatti, G. Consolati, Y. Kino   +5 more
core   +3 more sources

Preliminary Study of a Ninj1‐Loaded Bimodal Ultrasound/NIR Fluorescence Targeted Molecular Probe for Diagnosing Early‐Stage Inflammation in Coronary Microvascular Dysfunction

Advanced Healthcare Materials, EarlyView.
Coronary microvascular dysfunction (CMD) targeting remains a challenge for precise diagnosis. This work presents a dual‐modal nanoprobe (T‐IR780‐NBs) that combines ultrasound contrast with near‐infrared fluorescence. This technology utilizes proteomics‐derived antibodies that specifically localize to inflamed and injured cardiac tissue, enabling ...
Xiaohui Xu, Lina Guan, Baihetiya Tayier, Chen Yuan, Shangke Chen, Qi Shi, Yuming Mu   +6 more
wiley   +1 more source

Formation of "Lightnings" in a Neutron Star Magnetosphere and the Nature of RRATs

, 2011
The connection between the radio emission from "lightnings" produced by the absorption of high-energy photons from the cosmic gamma-ray background in a neutron star magnetosphere and radio bursts from rotating radio transients (RRATs) is investigated ...
A. A. Abdo, A. D. Kuz’min, A. Esamdin, A. G. Lyne, A. G. Lyne, A. G. Lyne, A. J. Deutsch, A. Karastergiou, A. V. Gurevich, B. J. Rickett, C. S. Shukre, D. A. Rumyantsev, D. N. Sobyanin, D. P. Barsukov, D. P. Barsukov, E. F. Keane, F. Camilo, F. Camilo, L. Levin, M. A. McLaughlin, M. A. McLaughlin, M.V. Chistyakov, N. P. Klepikov, N. Wang, P. Goldreich, S. Burke-Spolaor, V. M. Malofeev, V. M. Malofeev, V. M. Malofeev, V. Radhakrishnan, V. S. Beskin, V. S. Beskin, Ya. N. Istomin, Ya. N. Istomin, Ya. N. Istomin, Ya. N. Istomin, Ya. N. Istomin, Ya. N. Istomin, Yu. P. Shitov, Yu. P. Shitov   +39 more
core   +1 more source

Taming the Immiscibility of Gold, Iron, and Boron to Craft Chemodegradable Nanoparticles for Multimodal Imaging and Radiotherapy

Advanced Healthcare Materials, EarlyView.
Over half of cancer patients undergo radiotherapy. Laser ablation enabled the synthesis of immiscible Au‐Fe‐B nanoparticles designed as degradable bimodal radiosensitizers for X‐ray radiotherapy (XRT), boron neutron capture therapy (BNCT), and bimodal imaging for X‐ray computed tomography (CT) and magnetic resonance imaging (MRI). These nanosensitizers
Michael Bissoli, Clara M.G. de Faria, Veronica Torresan, Maria Assunta Lacavalla, Mattia Cattelan, Denis Badocco, Paolo Pastore, Pasquina Marzola, Laura Cansolino, Cinzia Ferrari, Ian Postuma, Riccardo Vago, Silva Bortolussi, Antonello E. Spinelli, Daniel Forrer, Vincenzo Amendola   +15 more
wiley   +1 more source

Quantifying lung growth with CT-derived intrapulmonary vascular volume: a cross-sectional study

BMC Medical Imaging
Background This study aimed to evaluate lung growth by the quantitative assessment of intrapulmonary vascular volume on chest CT images. Methods All 1122 subjects were grouped with a 2-year age span.
Meijuan Shi, Peng Gao, Meng Li, Weili Yang, Nan Yin, Youmin Guo, Cong Shen   +6 more
doaj   +1 more source

Evaluation of the Dual Impact of Nanotechnologies on Health and Environment Through Alternative Bridging Models

Advanced Healthcare Materials, EarlyView.
This review explores how alternative invertebrate and small‐vertebrate models advance the evaluation of nanomaterials across medicine and environmental science. By bridging cellular and organismal levels, these models enable integrated assessment of toxicity, biodistribution, and therapeutic performance.
Marie Celine Lefevre, Margherita Bernardeschi, Matteo Battaglini, Gianni Ciofani   +3 more
wiley   +1 more source

Electromagnetic cascade in high energy electron, positron, and photon interactions with intense laser pulses

, 2013
The interaction of high energy electrons, positrons, and photons with intense laser pulses is studied in head-on collision geometry. It is shown that electrons and/or positrons undergo a cascade-type process involving multiple emissions of photons. These
Bulanov, S. S., Esarey, E., Leemans, W. P., Schroeder, C. B.   +3 more
core   +1 more source