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Influence of Support Material on the Activity and Selectivity of Pt–Ir Catalysts for Ring Opening Reactions
(Springer, 2014-12)
The influence of the supports (Al2O3, TiO2 and SiO2) on the activity and selectivity of Pt-Ir catalysts for the ring opening of decalin was studied. It was found that the properties of the supports strongly influence the ...
Quillen-Suslin Rings
In this paper we introduce the Quillen-Suslin rings and investigate its relation with some other classes of rings as Hermite rings (each stably free module is free), PSF rings (each finitely generated projective module is ...
A family of vortex rings and a variational application to potential flows around three-dimensional bodies
(Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM, 2008)
A variational formulation and solution of general three-dimensional potential flows gave rise to the construction of a special family of ‘trial functions’. This family is composed by circular-sector vortex rings, here named ...
Genetic trends in wood density and radial growth with cambial age in a radiata pine progeny test
(E D P SCIENCES, 2002)
The main objective of this study was to describe trends in genetic parameters for wood density and radial growth through cambial age in a radiata pine progeny test established in the south of Chile. Wood samples from 31 ...
Natural occurrence, biological activities and synthesis of eight-, nine-, and eleven-membered ring lactones
(Sociedade Brasileira de Química, 2008)
The natural occurrence, biological activities and synthetic approaches to natural eight-, nine-, and eleven-membered lactones is reviewed. These medium ring lactones are grouped according to ring size, and their syntheses ...
Alternant and BCH codes over certain rings
(Sociedade Brasileira de Matemática Aplicada e Computacional, 2014)
Electric currents induced by twisted light in quantum rings
(Optical Society of America, 2009-10)
We theoretically investigate the generation of electric currents in quantum rings resulting from the optical excitation with twisted light. Our model describes the kinetics of electrons in a two-band model of a semiconductor-based ...
Influence of the Brønsted acidity, SiO2/Al2O3 ratio and Rh-Pd content on the ring opening. Part II. Selective ring opening of methylcyclohexane
(Elsevier, 2014-01)
Monometallic and bimetallic Pd-Rh catalysts with various Rh/Pd atomic ratios (=0.5, 1 and 2) and a total metal charge of 1 wt% supported on SiO2-Al2O3(SIRAL 40, 20, 5) were studied for the ring opening of methylcyclohexane ...
Fluctuation-induced forces between rings threaded around a polymer chain under tension
(American Physical Society, 2016-09)
We characterize the fluctuation properties of a polymer chain under external tension and the fluctuation-induced forces between two ring molecules threaded around the chain. The problem is relevant in the context of ...