In this paper we construct a q-deformation of the Witt-Burnside ring of a profinite group over a commutative ring, where q ranges over the ring of integers. When q = 1, this coincides with the Witt-Burnside ring introduced by A. To achieve our goal we show that there exists a q-deformation of the necklace ring of a profinite group over a commutative ring. As in the classical case, i.e., the cas...

The following result is proved: Let R be a 2-torsion free semiprime ring, and let T : R → R be an additive mapping, related to a surjective homomorphism θ : R → R, such that 2T (x2) = T (x)θ(x) + θ(x)T (x) for all x ∈ R. Then T is both a left and a right θ-centralizer.

This year's Lasker DeBakey Clinical Research Award goes to Napoleone Ferrara for the discovery of vascular endothelial growth factor (VEGF) as a major mediator of angiogenesis and for the development of an effective anti-VEGF therapy for wet macular degeneration, a leading cause of blindness in the elderly.

A. Meloni, M. C. Dell'Amico, B. Favilli, G. D. Aquaro, P. Festa, E. Chiodi, S. Renne, G. Restaino, V. Positano, M. C. Galati, M. Lombardi, and A. Pepe Fondazione G.Monasterio CNR-Regione Toscana and Institute of Clinical Physiology, Pisa, Italy, Arcispedale “S. Anna”, Ferrara, Italy, P.O. “Giovanni Paolo II”, Lamezia Terme, Italy, Università Cattolica del Sacro Cuore, Campobasso, Italy, A.O. "P...

in this paper we define a new type of rings ”almost powerhermitian rings” (a generalization of almost hermitian rings) and establish several sufficient conditions over a ring r such that, every regular matrix admits a diagonal power-reduction.

Crocus sativus L. (saffron) is a widely used food additive for its color and taste. The hypotensive effects of saffron have been shown in previous studies. The aim of this study was to evaluate the mechanism of vasodilatory effects induced by saffron on isolated rat aorta.To study the vasodilatory effects of saffron aqueous extract (0.5, 1 and 2 mg/mL), isolated rat thoracic aorta rings were co...

Objetivo: Analisar quais os benefícios clínicos do implante anel de Ferrara em pacientes acometidos pelo ceratocone. Métodos: Trata-se uma revisão integrativa, feita através da pesquisa artigos completos, na íntegra, entre 2017 e 2022, nas línguas portuguesa, inglesa espanhola, relacionados ao objetivo trabalho, principais bibliotecas: BVS, Science Direct SCIELO, cruzando DeCS: “ceratocone”, “F...

BACKGROUND A "saddle-shaped" mitral annulus with an optimal ratio between annular height and commissural diameter may reduce leaflet and chordal stress and is purported to be conserved across mammalian species. Whether annuloplasty rings maintain this relationship is unknown. METHODS AND RESULTS Twenty-three adult sheep underwent implantation of radiopaque markers on the left ventricle and mi...