A bstractWe discuss how to perform consistent extractions of anomalous triple gauge couplings (aTGC) from electroweak boson pair production at the LHC in the Standard Model Effective Field Theory (SMEFT). After recasting recent ATLAS and CMS searches in pp → W Z(W W ) → ℓ′νℓ+ℓ−(νℓ) channels, we find that: (a) working consistently at order Λ−2 in the SMEFT expansion the existing aTGC bounds from Higgs and LEP-2 data are not improved, (b) the strong limits quoted by the experimental collaborations are due to the partial Λ−4 corrections (dimension-6 squared contributions). Using helicity selection rule arguments we are able to explain the suppression in some of the interference terms, and discuss conditions on New Physics (NP) models that can benefit from such LHC analyses. Furthermore, standard analyses assume implicitly a quite large NP scale, an assumption that can be relaxed by imposing cuts on the underlying scale of the process (s^$$ \sqrt{\widehat{s}} $$). In practice, we find almost no correlation between s^$$ \sqrt{\widehat{s}} $$ and the experimentally accessible quantities, which complicates the SMEFT interpretation. Nevertheless, we provide a method to set (conservative) aTGC bounds in this situation, and recast the present searches accordingly. Finally, we introduce a simple NP model for aTGC to compare the bounds obtained directly in the model with those from the SMEFT analysis.

A Guerra do Paraguai (1864-1870) fez com que muitos legionários Brummer, imigrantes alemães e seus descendentes, principalmente de São Leopoldo (RS) e arredores, se engajassem no conflito, em sua maioria através da Guarda Nacional de São Leopoldo, do Batalhão de Voluntários da Pátria nº 33 e da “Bateria Alemã”, formada principalmente pelos Brummer. O artigo aborda a participação dos legionários Brummer, dos imigrantes alemães e de seus descendentes na Guerra do Paraguai, verificando a sua contribuição militar ao longo do conflito. Pretende-se analisar, ainda, o discurso de alguns desses personagens para compreender a construção de uma memória positiva sobre a sua participação na guerra, bem como a afirmação de que eram cidadãos exemplares de sua nova pátria: o Brasil.

4-O-5 diaryl ether owns the strongest aryl−aryl ether bond of the abundant Caryl−O bonds in lignin. Selective hydrodeoxygenation (HDO) of diaryl ethers to oxygen-free aromatics and alkanes has been achieved over nickel nanoparticles supported on Zr-doped niobium phosphate solid acids in an autoclave under the mild conditions. Py-IR, NH3-TPD and TEM techniques were conducted to investigate the surface acidity and metal particle distribution of as-synthesized catalysts. Nickel on Zr-doped niobium phosphate exhibited an excellent activity for 84 % conversion of diaryl ether and a better selectivity of oxygen-free aromatic about 62 % and the total HDO selectivity reached up to 92 % at 220 oC and 0.5 MPa, which is attributed to the favorable synergetic catalytic effect between acid sites and metal sites. In addition, higher reaction temperature favors the production of oxygen-free aromatics and alkanes and low H2 pressure is benefit for formation of benzene.

INTRODUCTION: A number of biochemical and medical researchers have detected increased activity of tyrosinase in skin tumor cells. The most famous and available inhibitor, kojic acid, has several side effects and is not completely safe for use. OBJECTIVES: This paper describes the study of inhibitory influence of halogen boroxine K 2 [B 3 0 3 F 4 OH] on tyrosinase. The research was prompted by the ability of this compound to inhibit enzymes through metal ion chelation as well as its synthesis and application in cosmetic skin products that produce no serious side-effects. METHOD: Tyrosinase activity was measured by spectrophotometric analysis for the appearance of dopachrome pigment at a wavelength of 475 nm. Tyrosinase exhibited typical Michaelis-Menten kinetics. RESULTS: Tests of the proposed inhibition of the enzyme tyrosinase showed that K 2 [B 3 O 3 F 4 OH] had weak inhibitory properties. CONCLUSION: It will be necessary to search for new ways of antitumor mechanisms that differ from those of previous results.