Jordan derivations on triangular matrix rings

Guided by the research line introduced by Martindale III in [5] on the study of the additivity of maps, this article aims establish conditions on triangular matrix rings in order that an map φ satisfying φ(ab + ba) = φ(a)b + aφ(b) + φ(b)a + bφ(a) for all a, b in a triangular matrix ring becomes additive.peerReviewe

Crystalline Cluster Model For Ionic Solids: Nacl

A crystalline cluster model for ionic crystals is presented, in the large context of the self-consistent-field multiple-scattering method, by imposing that the cluster potential has the same features as the crystal potential. The model is particularly investigated with respect to NaCl, and the results are compared with those of a conventional cluster calculation. It is seen that the main features of the electronic structure emerge from the occupied cluster states and the obtained results of our model provide a good interpretation of experimentally observed properties, e.g., the experimental one-electron spectrum. © 1979 The American Physical Society.2083415342

Jordan triple elementary maps on alternative rings

Let ℜ and ℜ՛ be alternative rings. We study the additivity of surjective Jordan triple elementary maps of ℜ X ℜ՛. We prove that if R contains a non-trivial idempotent satisfying some conditions, then they are additives.Fundação de Amparo à Pesquisa do Estado de São Paulo(FAPESP). Proc. 2010/50347-9peerReviewe

Wasted sardine oil as a co-substrate for biogas production - pilot experiment of decentralized organic waste management in a pig farm

RAMIRAN International ConferenceThe purpose of this work was to demonstrate in a commercial pig farm with a biogas plant and in real conditions, the possibilities to co-digest WSO and PS at farm level. Anaerobic digestion is one of the most adequate technologies to manage this type of industrial organic waste streams (Chowdhury et al., 2009), and the decentralized operations of organic waste management for biogas production have many advantages but also a number of uncertainties that must be evaluated (Weiland, 2006; Raven et al., 2007). Since it was the first time that in Portugal such an experience was done, the production of technical information to the veterinary authorities was a secondary goal

Anthelmintic activity of Cymbopogon martinii, Cymbopogon schoenanthus and Mentha piperita essential oils evaluated in four different in vitro tests

AbstractAnthelmintic resistance is a worldwide concern in small ruminant industry and new plant-derived compounds are being studied for their potential use against gastrointestinal nematodes. Mentha piperita, Cymbopogon martinii and Cymbopogon schoenanthus essential oils were evaluated against developmental stages of trichostrongylids from sheep naturally infected (95% Haemonchus contortus and 5% Trichostrogylus spp.) through the egg hatch assay (EHA), larval development assay (LDA), larval feeding inhibition assay (LFIA), and the larval exsheathment assay (LEA). The major constituent of the essential oils, quantified by gas chromatography for M. piperita oil was menthol (42.5%), while for C. martinii and C. schoenanthus the main component was geraniol (81.4% and 62.5%, respectively). In all in vitro tests C. schoenanthus essential oil had the best activity against ovine trichostrongylids followed by C. martini, while M. piperita presented the least activity. Cymbopogon schoenanthus essential oil had LC50 value of 0.045mg/ml in EHA, 0.063mg/ml in LDA, 0.009mg/ml in LFIA, and 24.66mg/ml in LEA. The anthelmintic activity of essential oils followed the same pattern in all in vitro tests, suggesting C. schoenanthus essential oil could be an interesting candidate for nematode control, although in vivo studies are necessary to validate the anthelmintic properties of this oil

Influence Of Maturity Stage On Fruit Longevity Of Cherry Tomatoes Stored At Ambient And Controlled Temperature

Fruit maturity stage has direct influence on the post-harvest life and consumer quality. Therefore, the understanding of the maturation process and its quality characteristics for storage are key factors for commercialization. In face of the foregoing, this study aimed to determine shelf life and changes in physical and chemical indexes of cherry tomatoes (Perinha Água Branca (PAB) and Mascot), assessing fruit harvested at four maturity stages and stored at ambient and controlled temperatures. For this, it was used fruit at turning, pink, red and ripe maturity stages, submitted to ambient (25 ± 2 °C) and controlled (12 °C and 90% RH) temperature, and assessed over time the indexes of fresh mass loss, titratable acidity, pH, soluble solids and ascorbic acid. The experimental design was completely randomized design in a factorial scheme of 2×4×7 for ambient temperature and 2×4×8 for controlled temperature. At ambient temperature, a longevity of up to 20 days was observed for PAB and Mascot fruit harvested at turning and pink maturity stages. When harvested at red and ripe stages, the longevity was of 15 days for PAB fruit and of 15 and 11 days, respectively, for Mascot fruit. At controlled temperature, PAB fruit showed longevity of 24 days when harvested at turning and pink stages and of 20 and 7 days, respectively, when harvested at red and ripe stages. A longevity of up to 27 days was observed for Mascot fruit harvested at turning stage and of 24 days for the other stages. The fruit harvested at turning and pink maturity stages, associated with storage under controlled conditions, presented higher longevity and maintenance of physical and chemical indexes of quality.3764027403

Material mapping of QCT-derived scapular models : a comparison with micro-CT loaded specimens using digital volume correlation

Subject- and site-specific modeling techniques greatly improve finite element models (FEMs) derived from clinical-resolution CT data. A variety of density-modulus relationships are used in scapula FEMs, but the sensitivity to selection of relationships has yet to be experimentally evaluated. The objectives of this study were to compare quantitative-CT (QCT) derived FEMs mapped with different density-modulus relationships and material mapping strategies to experimentally loaded cadaveric scapular specimens. Six specimens were loaded within a micro-CT (33.5 μm isotropic voxels) using a custom-hexapod loading device. Digital volume correlation (DVC) was used to estimate full-field displacements by registering images in pre- and post-loaded states. Experimental loads were measured using a 6-DOF load cell. QCT-FEMs replicated the experimental setup using DVC-driven boundary conditions (BCs) and were mapped with one of fifteen density-modulus relationships using elemental or nodal material mapping strategies. Models were compared based on predicted QCT-FEM nodal reaction forces compared to experimental load cell measurements and linear regression of the full-field nodal displacements compared to the DVC full-field displacements. Comparing full-field displacements, linear regression showed slopes ranging from 0.86 to 1.06, r-squared values of 0.82–1.00, and max errors of 0.039 mm for all three Cartesian directions. Nearly identical linear regression results occurred for both elemental and nodal material mapping strategies. Comparing QCT-FEM to experimental reaction forces, errors ranged from − 46 to 965% for all specimens, with specimen-specific errors as low as 3%. This study utilized volumetric imaging combined with mechanical loading to derive full-field experimental measurements to evaluate various density-modulus relationships required for QCT-FEMs applied to whole-bone scapular loading. The results suggest that elemental and nodal material mapping strategies are both able to simultaneously replicate experimental full-field displacements and reactions forces dependent on the density-modulus relationship used