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New classes of bi-axially symmetric solutions to four-dimensional Vasiliev higher spin gravity
We present new infinite-dimensional spaces of bi-axially symmetric asymptotically anti-de Sitter solutions to four-dimensional Vasiliev higher spin gravity, obtained by modifications of the Ansatz used in arXiv: 1107.1217, ...
Rhodium(I) diphenylphosphine complexes supported on porous organic polymers as efficient and recyclable catalysts for alkene hydrogenation
(ROYAL SOC CHEMISTRY, 2017)
This paper describes the synthesis and characterization of porous polymeric materials as a support for rhodium(I) cationic coordination compounds and their use as heterogeneous catalysts for alkene hydrogenation. The ...
Synthesis, thermal behavior, and aggregation in aqueous solution of poly(methyl methacrylate)-b-poly(2-hydroxyethyl methacrylate)
(2014 Sociedad Chilena de Química, 2013)
ABSTRACT Amphiphilic block copolymers of poly(methyl methacrylate) PMMA and poly(2-hidroxyethyl methacrylate) PHEMA were synthesized by a two-step atom transfer radical polymerization (ATRP). Copolymers with various ...
Lichens: might be considered as a source of gastroprotective molecules?
ABSTRACT Lichens are symbiotic relationship between fungi and algae or cyanobacteria. Secondary metabolites from lichens are known as lichen substances. We investigated depsidone and depside from lichens 1-6 in the ...
BRST Anomaly and Superspace Constraints of the Pure Spinor Heterotic String in a Curved Background
The pure spinor heterotic string in a generic super Yang-Mills and supergravity background is onsidered. We determine the one-loop BRST anomaly at the cohomological level. We prove that it can be absorbed by consistent ...
Quasar lenses and pairs in the VST-ATLAS and Gaia
(Oxford University Press, 2018-04)
We report on discovery results from a quasar lens search in the ATLAS-DR3 public footprint. Spectroscopic follow-up campaigns, conducted at the 2.6 m Nordic Optical Telescope (La Palma) and 3.6mNew Technology Telescope (La ...
Optoelectronic properties of triphenylamine based dyes for solar cell applications. A DFT study
(Sociedade Brasileira de Quimica, 2018-02)
Dye-sensitized solar cells (DSSCs) based on triphenylamine (TPA) as a donor group linked with the acceptor cyanoacrylic acid electron acceptor by 2,2'-bithiophene as π-bridged (D-π-A) has been investigated by Density ...
Sorption of apolar pesticides by units of benzoic acid propyl ester in cyclic phosphazene
(Sociedad Chilena de Quimica, 2017)
The effects of temperature, pH and agitation time (equilibrium) on the adsorption process of different pesticides on N3P3(OC6H4COOCH2CH2CH3)6 was studied. With optimal conditions experimental, the adsorption isotherms have ...
TOPoS: IV. Chemical abundances from high-resolution observations of seven extremely metal-poor stars
(EDP Sciences, 2018-04)
Context. Extremely metal-poor (EMP) stars provide us with indirect information on the first generations of massive stars. The TOPoS survey has been designed to increase the census of these stars and to provide a chemical ...