Results 11 to 20 of about 68,500 (261)
Technetium and the third dredge up in AGB stars. I. Field stars [PDF]
Astron.Astrophys.411:533-542,2003, 2003 We searched for Tc in a sample of long period variables selected by stellar luminosity derived from Hipparcos parallaxes. Tc, as an unstable s-process element, is a good indicator for the evolutionary status of stars on the asymptotic giant branch (AGB).
Hron, J., Lebzelter, T.
core +2 more sources
Discovery of Yttrium, Zirconium, Niobium, Technetium, and Ruthenium Isotopes [PDF]
, 2011 Currently, thirty-four yttrium, thirty-five zirconium, thirty-four niobium, thirty-five technetium, and thirty-eight ruthenium isotopes have been observed and the discovery of these isotopes is discussed here.
A. Nystrom +170 more
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The Henize sample of S stars. I. The technetium dichotomy [PDF]
Astron.Astrophys.345:127-136,1999, 1999 This paper is the first one in a series investigating the properties of the S stars belonging to the Henize sample (205 S stars with ...
Jorissen, A., Van Eck, S.
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Technetium Complexes and Radiopharmaceuticals with Scorpionate Ligands
Molecules, 2018 Scorpionate ligands have played a crucial role in the development of technetium chemistry and, recently, they have also fueled important advancements in the discovery of novel diagnostic imaging agents based on the γ-emitting radionuclide ...
Petra Martini +5 more
doaj +2 more sources
Substitutional 4d and 5d Impurities in Graphene [PDF]
, 2016 We describe the structural and electronic properties of graphene doped with substitutional impurities of 4d and 5d transition metals. The binding energy and distances for 4d and 5d metals in graphene show similar trends for the later groups in the ...
Aguilera-Granja, Faustino +2 more
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Period -- mass-loss rate relation of Miras with and without technetium [PDF]
, 2013 Aims: We report the discovery that Mira variables with and without absorption lines of the element technetium (Tc) occupy two different regions in a diagram of near- to mid-infrared colour versus pulsation period.
Uttenthaler, Stefan
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Journal of Medicinal Chemistry, 2023 Technetium-99m is the workhorse of diagnostic nuclear medicine. The aim of the work is to analyze the technetium-99m patents since 2000 to photograph its innovation. QUESTEL’s ORBIT Intelligence system was used for the collection of technetium inventions
M. Riondato +6 more
semanticscholar +1 more source
Synthesis of technetium hydride TcH$_{1.3}$ at 27 GPa [PDF]
Physical Review B, 004100 (2023), 2022 In this work, we synthesize and investigate lower technetium hydrides at pressures up to 45 GPa using the synchrotron X-ray diffraction, reflectance spectroscopy, and ab initio calculations. In the Tc-H system, the hydrogen content in TcH$_x$ phases increases when the pressure rises, and at 27 GPa we found a new hexagonal (hcp) nonstoichiometric ...
arxiv +1 more source
Circulation Cardiovascular Imaging, 2020 Background: Technetium-99 m pyrophosphate protocols for transthyretin cardiac amyloidosis diagnosis have variably used 1- and 3-hour imaging time points.
A. Masri +9 more
semanticscholar +1 more source
Abundance of radioactive technetium in Przybylski's star revisited [PDF]
, 2023 We have searched for lines of the radioactive element technetium (Tc) in the spectrum of Przybylski's star (HD101065). The nuclei of this chemical element are formed in the slow process of capturing thermalized neutrons. The possible lines of Tc~I are heavily blended.
arxiv +1 more source