Probing the two-scale-factor universality hypothesis by exact rotation symmetry-breaking mechanism

We probe the two-scale factor universality hypothesis by evaluating, firstly explicitly and analytically at the one-loop order, the loop quantum corrections to the amplitude ratios for O($N$) $\lambda\phi^{4}$ scalar field theories with rotation symmetry-breaking in three distinct and independent methods in which the rotation symmetry-breaking mechanism is treated exactly. We show that the rotation symmetry-breaking amplitude ratios turn out to be identical in the three methods and equal to their respective rotation symmetry-breaking ones, although the amplitudes themselves, in general, depend on the method employed and on the rotation symmetry-breaking parameter. At the end, we show that all these results can be generalized, through an inductive process based on a general theorem emerging from the exact calculation, to any loop level and physically interpreted based on symmetry ideas.Comment: 17 pages, 3 figure

Avaliação de híbridos de mangueira entre variedades monoembriônicas, em um ciclo de produção, no semi-árido brasileiro.

O objetivo do presente trabalho consistiu na avaliação de híbridos da cultura obtidos entre a variedade Tommy Atkins e outras variedades monoembriônicas, em um ciclo de produção, no Semi-Árido Brasileiro, considerando-se os parâmetros físico-químicos relacionados aos frutos

Avaliação de híbridos completos de mangueira da variedade Tommy Atkins, em um ciclo, no Semiárido brasileiro.

O objetivo do presente trabalho consiste, portanto, na avaliação de híbridos completos da tradicional variedade Tommy Atkins ou, ocasionalmente, de progênies resultantes de eventuais autofecundações, em uma safra (2013-2014), no Semiárido Brasileiro, considerando-se parâmetros físicos e químicos associados aos fruto

Similaridade genética de acesso de mangueira de diferentes origens geográficas avaliadas por marcadores AFLP.

O objetivo do presente trabalho foi determinar as relações genéticas, com base no marcador AFLP, dos acessos do banco de germoplasma de mangueira da Embrapa Semi-Árido, de forma a orientar trabalhos de melhoramento genético e de manejo de recursos genéticos da espécie

Sol-gel deposition of ZrO2 films in air and in oxygen-free atmospheres for chemical protection of 304 stainless steel : a comparative corrosion study

ZrO2 coatings for corrosion protection were deposited on 304 stainless steel by sol-gel method using zirconium propoxide as precursor and densified in air and in oxygen-free (argon or nitrogen) atmospheres. XRD and IR data of the films were practically independent of the atmosphere used in the densification step showing that the ceramic oxide is properly formed from the precursor. The corrosion behavior of the stainless steel substrate was studied by potentiodynamic polarization curves in the absence and the presence of ZrO2 coatings prepared in air, argon or nitrogen. The coatings extended the lifetime of the material by a factor of almost eight in a very aggressive environment, independently of the preparation procedure. The possibility of depositing pure or mixed oxide films by sol-gel methods in the absence of additional oxygen will allow the preparation of specific coatings onto oxygen-reactive substrates

Avaliação de híbridos meios irmãos de mangueira da variedade surpresa, em um ciclo, no Semiárido brasileiro.

O objetivo do 27 trabalho consistiu na avaliação de progênies da variedade Surpresa, em uma safra (2013-2014), no 28 Semiárido Brasileiro, considerando-se atributos físicos e químicos associados aos frutos

Allelic database and accession divergence of a Brazilian mango collection based on microsatellite markers.

Allelic patterns and genetic distances were examined in a collection of 103 foreign and Brazilian mango (Mangifera indica) accessions in order to develop a reference database to support cultivar protection and breeding programs. An UPGMA dendrogram was generated using Jaccard coefficients from a distance matrix based on 50 alleles of 12 microsatellite loci. The base pair number was estimated by the method of inverse mobility. The cophenetic correlation was 0.8. The accessions had a coefficient of similarity of from 30 to 100%, which reflects high genetic variability. Three groups were observed in the UPGMA dendrogram; the first group was formed predominantly by foreign accessions, the second group was formed by Brazilian accessions, and the Dashehari accession was isolated from the others. The 50 microsatellite alleles did not separate all 103 accessions, indicating that there are duplicates in this mango collection. These 12 microsatellites need to be validated in order to establish a reliable set to identify mango cultivars