Results 71 to 80 of about 1,787,488 (253)

Zirconium-89 Complexes for Cell Tracking with Positron Emission Tomography [PDF]

, 2015
Tracking cell migration in vivo by scintigraphy using cells labelled with gamma-emitting radionuclides (especially indium-111) is a well-established clinical and research tool.
Ferris, Trevor John
core  

Ortho-positronium lifetime for soft-tissue classification

Scientific Reports
The objective of this work is to showcase the ortho-positronium lifetime as a probe for soft-tissue characterization. We employed positron annihilation lifetime spectroscopy to experimentally measure the three components of the positron annihilation ...
Ashish V. Avachat, Kholod H. Mahmoud, Anthony G. Leja, Jiajie J. Xu, Mark A. Anastasio, Mayandi Sivaguru, Angela Di Fulvio   +6 more
doaj   +1 more source

Distribution of Positron Annihilation Lifetime Components

مجلة بغداد للعلوم, 2008
The intensities of the positron annihilation lifetime components are shown to be related to the free volume model, and the theoretical value of the ratio between the singlet to the triplet state intensities, described by the ratio η, is shown to follow ...
Ahmed Abdul-Razzaq Selman, Muna Ahmed Saeed   +1 more
doaj   +1 more source

Stability of vacancies in β-type Ti-15Mo-5Zr-3Al alloy fabricated via laser powder bed fusion

Additive Manufacturing Letters, 2023
The structural instability in the β-type titanium alloys could affect the stability of vacancies. The stability of vacancies in a β-type Ti-15Mo-5Zr-3Al alloy, fabricated via laser powder bed fusion (LPBF), was investigated using positron annihilation ...
Masataka Mizuno, Kazuki Sugita, Kousuke Do, Takuya Ishimoto, Takayoshi Nakano, Hideki Araki   +5 more
doaj   +1 more source

The liver‐brain axis: A multidimensional regulatory network implicated in Alzheimer's disease pathogenesis and clinical implications

Animal Models and Experimental Medicine, EarlyView.
Schematic diagram of the core pathways of the liver‐brain axis in regulating AD. The liver regulates cerebral Aβ deposition, tau phosphorylation, and neuroinflammation through pathways such as metabolic detoxification (urea cycle, ketone body metabolism, glutathione antioxidant system), molecular secretion (APOE, CRP, FGF21, IGF‐1), and Aβ clearance ...
Ning Zhang, Wei Chen, Meng Wang
wiley   +1 more source

TOT Method for the Disentanglement of Photons in Positron Annihilation Lifetime Spectroscopy

Acta Physica Polonica A, 2020
The Jagiellonian Positron Emission Tomograph (J-PET) is a multidisciplinary device aiming to perform studies in medical field as well as to test the fundamental symmetries. The plastic scintillators offer very good time resolution. Although, due to the low atomic number of the plastic material, the incident photons interact mainly via the Compton ...
S. Sharma, on behalf of the J-PET collaboration   +1 more
openaire   +2 more sources

Structural Defects in TiNi-Based Alloys after Warm ECAP

Metals, 2020
The microstructure, martensitic transformations and crystal structure defects in the Ti50Ni47.3Fe2.7 (at%) alloy after equal-channel angular pressing (ECAP, angle 90°, route BC, 1–3 passes at T = 723 K) have been investigated.
Aleksandr Lotkov, Anatoly Baturin, Vladimir Kopylov, Victor Grishkov, Roman Laptev   +4 more
doaj   +1 more source

Self‐Assembled Telecom Color Centers in Silicon and Their Growth Environment

Advanced Physics Research, EarlyView.
Influence of the growth pressure during the formation of self‐assembled color centers in silicon grown by molecular beam epitaxy at ultra‐low temperatures on the color center's photoluminescence spectral signature. The growth pressure crucially determines color center selectivity, as evidenced by G‐centers, W‐centers, and T‐centers, matrix purity, and ...
Jacqueline Marböck, Enrique Prado Navarrete, Merve Karaman, Oliver E. Lang, S. Mijatovic, Thomas Fromherz, Maciej O. Liedke, Andreas Wagner, Moritz Brehm, Johannes Aberl   +9 more
wiley   +1 more source

Positron annihilation lifetime spectroscopy of ZnO bulk samples [PDF]

Physical Review B, 2007
In order to gain a further insight into the knowledge of point defects of ZnO, positron annihilation lifetime spectroscopy was performed on bulk samples annealed under different atmospheres. The samples were characterized at temperatures ranging from 10 to 500 K.
Zubiaga, A., Plazaola, F., Garcia, J.A., Tuomisto, Filip, Munoz-San Jose, V., Tena-Zaera, R.   +5 more
openaire   +2 more sources

Free volume investigation of imidazolium ionic liquids from positron lifetime spectroscopy [PDF]

, 2014
In this work, relationships between the free volume and various fundamental physical properties (density, surface tension and transport properties) of ionic liquids were investigated.
Yu Yang, Dana Bejan, R. Krause-Rehberg
semanticscholar   +1 more source