17 research outputs found
Critical properties of random anisotropy magnets
The problem of critical behaviour of three dimensional random anisotropy
magnets, which constitute a wide class of disordered magnets is considered.
Previous results obtained in experiments, by Monte Carlo simulations and within
different theoretical approaches give evidence for a second order phase
transition for anisotropic distributions of the local anisotropy axes, while
for the case of isotropic distribution such transition is absent. This outcome
is described by renormalization group in its field theoretical variant on the
basis of the random anisotropy model. Considerable attention is paid to the
investigation of the effective critical behaviour which explains the
observation of different behaviour in the same universality class.Comment: 41 pages, 10 figure
Phenotypic correlation, path coefficient and multivariate analysis for yield and yield-associated traits in groundnut accessions
Yield is a complex quantitative trait largely influenced by the environment.
Direct selection for grain yield is less efficient in improving groundnut productivity.
The selection efficiency can be enhanced by exploiting the relationship
between yield and its related traits. Moreover, the use of genetically diverse parents
is essential to generate genetic variation for successful selection of genotypes in
a breeding program. Therefore, the study aimed at analysing the relationship
between grain yield and its related traits and determining the morphological
diversity among selected groundnut genotypes under natural rosette disease (GRD)
infestation. The genotypes were evaluated in a 7 Ă 4 alpha lattice design with three
replications. Data were collected on yield and yield-related traits. Correlation, path
coefficient and multivariate analyses were done. The results revealed that yield was
directly associated with plant height, number of pods per plant, hundred seed
weight, GRD incidence and number of secondary branches. Therefore, these traits
should be considered in selection when improving groundnut for yield. Cluster
analysis revealed existence of diversity among the evaluated groundnut genotypes with no influence of geographical origin to the clustering pattern. The Principal
Components Analysis (PCA) biplot was effective in showing the genetic distance
among the genotypes and the results were comparable with those of the cluster
analysis. Moreover, Shannon-Weaver diversity indices revealed existence of high
diversity among the genotypes, an implication that groundnut improvement for
yield is possible through selection in breeding
Conservation de hachis de sardine en entreposage Ă l'Ă©tat congelĂ©Ă - 20°C: hachis obtenus Ă partir de sardine entiĂšre, et de sardine Ă©tĂȘtĂ©e et Ă©viscĂ©rĂ©e
Polyurethane Foam Residue Biodegradation through the Tenebrio molitor Digestive Tract: Microbial Communities and Enzymatic Activity
Polyurethane (PU) is a widely used polymer with a highly complex recycling process due to its chemical structure. Eliminating polyurethane is limited to incineration or accumulation in landfills. Biodegradation by enzymes and microorganisms has been studied for decades as an effective method of biological decomposition. In this study, Tenebrio molitor larvae (T. molitor) were fed polyurethane foam. They degraded the polymer by 35% in 17 days, resulting in a 14% weight loss in the mealworms. Changes in the T. molitor gut bacterial community and diversity were observed, which may be due to the colonization of the species associated with PU degradation. The physical and structural biodegradation of the PU, as achieved by T. molitor, was observed and compared to the characteristics of the original PU (PU-virgin) using Fourier Transform InfraRed spectroscopy (FTIR), Thermal Gravimetric Analysis (TGA), and Scanning Electron Microphotography (SEM).Ministerio de Ciencia e InnovaciĂłn 2i18sae00058, TED2021-131894B-C2