نتایج جستجو برای: f 18
تعداد نتایج: 633014 فیلتر نتایج به سال:
Transport properties of tetragonal iron monosulfide, mackinawite, show a range of complex features. Semiconductive behavior and proximity to metallic states with nodal superconductivity mark this d-band system as unconventional quantum material. Here, we use the density functional dynamical mean-field theory (DFDMFT) scheme to comprehensively explain why tetragonal FeS shows both semiconducting...
We give a review about the historical development and various technological achievements in the field of excimer lasers since their discovery in 1970. The first commercial excimer laser model in the world, the EMG 500 from Lambda Physik was operating at maximum repetition rates of only 20Hz, whereas today multi kiloHz excimer lasers as the NovaLine lasers are available. In 2000 Lambda Physik in...
Co(II) nitrate reacts with potassium 5-[(2-methyl-1H-imidazol-1-yl)methyl]isophthalate (K2L) under hydrothermal conditions to yield a new complex [Co(L)(H2O)] (1). In the presence of 2-(pyridin2-yl)-1H-benzo[d]imidazole (pybim) as auxiliary ligand, complex [Cd(L)(pybim)] (2) can be obtained using Cd(NO3)2. Complexes 1 and 2 have been characterized by single-crystal and powder X-ray diffraction,...
Introduction. It was previously known that S contents were low in the two volatile depleted magmatic iron-meteorite groups IVA and IVB. Group IID, with 21 members, the fourth largest magmatic group, also has a low S content but has high contents of other volatiles. We suggest that this surprising juxtaposition is best understood by two episodes of core formation, with the IID irons forming from...
Before the rationing of tea was introduced, New Zealand had the third largest annual consumption of tea in the world, namely 8.2 Ib./person. Subsequently, the ration of 2 oz./wcek with extra concessions to people working in factories and offices provided an annual consumption of 6-5 lb./person. Most foods are found to be poor sources of fluorine, even when grown in fluorinerich soils, supposedl...
The method of high-energy total elastic X-ray scattering to determine the atomic structure of nanocrystalline, highly disordered and amorphous materials is presented. The current state of the technique, its potential, and limitations are discussed with two successful studies on the pressure induced phase transition in mackinawite (FeS) and the high-pressure behavior of liquid gallium.
Florbetaben is a fluorine-18 (18F)-labeled stilbene derivative that was developed as a positron emission tomography (PET) tracer for routine clinical application to visualize β-amyloid plaques in the Alzheimer's disease (AD) brain. The tracer successfully completed a global multicenter phase 0-III development program and was, as a consequence, recently approved by the US Food and Drug Administr...
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