3,519 research outputs found
Multifunctional microsphere formulation of fluorescent magnetic properties for drug delivery system
No full text© 2017 Author(s). The microsphere formulations of Chit/TPP/Sm/Fe3O4/Rn were prepared by an ionic gelation technique, where Chit=chitosan, TPP=tripolyphosphate, Sm=samarium and Rn=ranitidine. Optimum of microsphere formulation exhibit magnetic and fluorescent properties with adsorption efficiency of ∼92% was obtained for Chit/TPP/Sm/Fe3O4/Rn with ratio 400:500:50:1:20. Fluorescence intensity of microsphere formulations increased with the cumulative amount release of ranitidine, so that the changing of fluorescence intensity at wavelength of 590 nm referring to the Sm3+ ion could be used as indicator in DDS. With the demonstration of sustained release from microsphere formulation, it allows to investigate the applications to other drugs
beta-decay spectroscopy of neutron-rich Sm-160,Sm-161,Sm-162 isotopes
No full textNeutron-rich Sm-160,Sm-161,Sm-162 isotopes have been populated at the RIBF, RIKEN via beta decay for the first time. beta-coincident gamma rays were observed in all three isotopes including gamma rays from the isomeric decay of Sm-160 and Sm-162. The isomers in Sm-160 and Sm-162 have previously been observed but have been populated via beta decay for the first time. The isomeric state in Sm-162 is assigned a 4(-) nu 7/2(+)[633]circle times nu 1/2(-)[521] configuration based on the decay pattern. The level schemes of Sm-160 and Sm-162 are presented. The ground states in the parent nuclei Pm-160 and Pm-162 are both assigned a 6(-) nu 7/2(+)[633]circle times pi 5/2(-)[532] configuration based on the population of states in the daughter nuclei. Blocked BCS calculations were performed to further investigate the spin-parities of the ground states in Pm-160, Pm-161, and Pm-162, and the isomeric state in Sm-162.CPCI-S(ISTP)[email protected]
Shape evolution for Sm isotopes in relativistic mean-field theory
No full textThe evolution of shape from the spherical to the axially deformed shapes in the Sm isotopes is investigated microscopically in relativistic mean-field theory. The microscopic and self-consistent quadrupole deformation constrained relativistic mean-field calculations show a clear shape change for the even-even Sm isotopes with N = 82-96. The potential surfaces for Sm-148, Sm-150 and Sm-112 are found to be relatively flat, which may be the possible critical-point nuclei. By examining the single-particle spectra and nearest-neighbor spacing distribution of the single-particle levels, one finds that the single-particle levels in Sm-148 Sm-150, and Sm-152 distribute more uniformly.Physics, NuclearPhysics, Particles & FieldsSCI(E)54ARTICLE123-272
Metal-insulator multilayer precursors for enhanced Sm<sup>2+</sup> absorption and Tm<sup>2+</sup> luminescence in SiAlO thin films prepared by magnetron sputtering
No full textSilicon-aluminum-oxigen (SiAlO) coatings doped with Sm2+ and prepared by reactive magnetron co-sputtering of Si, Al, and Sm targets, are attractive for luminescence solar concentrator applications but suffer from the low absorption between 300 and 600 nm. This article reports that the main cause of low absorption is a high concentration of undesired Sm3+. This finding is supported by optical transmittance, photoluminescence emission and excitation characterization, and X-ray photoelectron spectroscopy data of the Sm's 3d5/2 edge. We present an alternative deposition process for obtaining Sm doped SiAlO layers with enhanced Sm2+ absorption by incorporating Sm through the use of multilayer thin-film precursors composed of metallic Sm and SiAlO layers. After thermal post-deposition treatments, diffusion and reaction of the metallic Sm layers with the SiAlO host results in coatings showing the characteristic 5d → 4f transitions of Sm2+ in the region between 250 and 600 nm which were not detectable in Sm-doped single layers. This same deposition strategy produces Tm doped SiAlO coatings with Tm2+‘s characteristic luminescence at 1132 nm when the SiAlO host is in the mullite composition region. The photoluminescence excitation spectrum of Tm2+ is compared to phosphor with similar composition and covers the range between 300 and 700 nm.An corrigendum is included at the end see also DOI 10.1016/j.jlumin.2021.118421RST/Luminescence MaterialsQN/AfdelingsbureauChemE/O&O groe
Charged Higgs contribution to B¯s→ϕπ0 and B¯s→ϕρ0
No full textAbstractWe study the decay modes B¯s→ϕπ0 and B¯s→ϕρ0 within the frameworks of two-Higgs doublet models type-II and type-III. We adopt in our study Soft Collinear Effective Theory as a framework for the calculation of the amplitudes. We derive the contributions of the charged Higgs mediation to the weak effective Hamiltonian governing the decay processes in both models. Moreover, we analyze the effect of the charged Higgs mediation on the Wilson coefficients of the electroweak penguins and on the branching ratios of B¯s→ϕπ0 and B¯s→ϕρ0 decays. We show that within two-Higgs doublet models type-II and type-III the Wilson coefficients corresponding to the electroweak penguins can be enhanced due to the contributions from the charged Higgs mediation leading into enhancement in the branching ratios of B¯s→ϕπ0 and B¯s→ϕρ0 decays. We find that, within two-Higgs doublet models type-II, the enhancement in the branching ratio of B¯s→ϕπ0 cannot exceed 18% with respect to the SM predictions. For the branching ratio of B¯s→ϕρ0, we find that the charged Higgs contribution in this case is small where the branching ratio of B¯s→ϕρ0 can be enhanced or reduced by about 4% with respect to the SM predictions. For the case of the two-Higgs doublet models type-III we show that the branching ratio of B¯s→ϕπ0 can be enhanced by about a factor 2 of its value within two-Higgs doublet models type-II. However, no sizeable enhancement with respect to the SM predictions can be obtained for both B¯s→ϕπ0 and B¯s→ϕρ0 decays
EL ACUSATIVO SG. LATINO DE TEMAS EN -S Y -SONANTE
No full textOpposed to the Monteil's idea considering the singular Latin accusative in - stems, -s- stems and -l, -r, -m, -n stems to be a remodelling form, the author of the present paper thinks they are to be reconstructed from *-eH2m.,*-sm., *-lm., *-mm., *-rm., *-nm..Opposed to the Monteil's idea considering the singular Latin accusative in - stems, -s- stems and -l, -r, -m, -n stems to be a remodelling form, the author of the present paper thinks they are to be reconstructed from *-eH2m.,*-sm., *-lm., *-mm., *-rm., *-nm.
Magnetic properties of quadruple perovskites Ba4LnRu3O12 (Ln=La, Nd, Sm-Gd, Dy-Lu)
No full textQuadruple perovskites Ba4LnRu3O12 (Ln=La, Nd, Sm-Gd, Dy-Lu) were prepared and their magnetic properties were investigated. They adopt the 12L-perovskite-type structure consisting of Ru3O12 trimers and LnO6 octahedra. All of these compounds show an antiferromagnetic transition at 2.5-30 K. For Ba4NdRu3O12, ferrimagnetic ordering has been observed at 11.5 K. The observed magnetic transition is due to the magnetic behavior of the Ru^[4.33+]3O12 trimer with S=1/2. Magnetic properties of Ba4LnRu3O12 were compared with those of triple perovskites Ba3LnRu2O9 and double perovskites Ba2LnRuO6
Author Correction: RNAa-mediated epigenetic attenuation of the cell senescence via locus specific induction of endogenous SIRT1 (Scientific Reports, (2022), 12, 1, (15826), 10.1038/s41598-022-17972-9)
No full text\ua9 The Author(s) 2023.The original version of this Article contained an error in the spelling of the author Ehsan Soleymaninejadian which was incorrectly given as Ehsan Soleimaninejadian. The original Article has been corrected
Six-proposition manifesto for small Island territories
No full textConventional wisdom suggests that small, often island, states are more likely than larger nations to be hard hit by the effects of national disasters, of fluctuations in the global economy, and the political aspirations of world powers. The structural weaknesses they share have been quantified to create a Vulnerability Index. This paper points to what the author sees as flaws in the concept of vulnerability and its application to the weaknesses of small states. In particular he presents evidence that small developing countries have performed no worse than larger countries. He sets out six propositions which explain this paradox and identifies the comparative advantages that small states hold.peer-reviewe
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