Análisis bioquímico del micelio del hongo Hormoconis resinae en la corrosión de aleaciones aeronáuticas de aluminio

Las diferencias entre el comportamiento corrosivo y no corrosivo de una cepa del hongo Hormoconis resinae sobre aluminio y sus aleaciones aeronáuticas se explicarían a través de análisis bioquímicos del micelio. En trabajos previos, el comportamiento corrosivo se estudió mediante análisis de superficie SEM-EDX, técnicas electroquímicas y ensayos de inmersión. En este trabajo, se llevó a cabo la separación de proteínas del micelio producido por una cepa que perdió su corrosividad y su cultivo a través de tres generaciones. Cultivos en batch, en presencia y ausencia de aluminio y sus aleaciones AA 2024, AA 7005 y AA 7075, a través de tres generaciones del micelio crecido, fueron recuperando sus características, incluida su habitual corrosividad, en la tercera replicación. De las fracciones de biomoléculas separadas y analizadas durante este estudio preliminar, sólo, las fracciones proteicas revelaron cambios de una a otra generación. Cuando esta cepa del hongo se cultivó en presencia de probetas de los metales, las modificaciones en la electroforesis de las respectivas fracciones proteicas fueron correlativas del comportamiento del micelio frente a la corrosión del aluminio y sus aleaciones.Biochemical analyses of the Hormoconis resinae fungal mycelium would explain behaviour differences of corrosive and non-corrosive strains on Al and its aeronautical alloys. In previous works its aggressiveness had been studied through SEM-EDX surface analysis, electrochemical techniques and immersion testing. In this paper separation of the proteins of the mycelium produced by a non-corrosive strain and its culture along three generations was performed. Cultures were prepared in batch in the presence and absence of pure Al and AA 2024, AA 7005 and AA 7075 alloys. The mycelia grown throughout the three generations increasingly recovered usual characteristics at the third replication, included their corrosiveness on Al and its alloys previously shown by all our strains. Amongst the bio-molecule fractions isolated and analysed during this preliminary study only the proteins revealed changes with the generation grown. When this fungal strain was cultured in the presence of alloy metal sheets electrophoresis of the protean fraction was correlative wFil: Araya, R.. Pontificia Universidad Católica de Valparaíso; ChileFil: Bobadilla, C.. Pontificia Universidad Católica de Valparaíso; ChileFil: Vera, R.. Pontificia Universidad Católica de Valparaíso; ChileFil: Rosales, Blanca Margarita. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; Argentin

Generalised Unitarity for Dimensionally Regulated Amplitudes

We present a novel set of Feynman rules and generalised unitarity cut-conditions for computing one-loop amplitudes via d-dimensional integrand reduction algorithm. Our algorithm is suited for analytic as well as numerical result, because all ingredients turn out to have a four-dimensional representation. We will apply this formalism to NLO QCD corrections.Comment: Presented at SILAFAE 2014, 24-28 Nov, Ruta N, Medellin, Colombi

Social Preference of Building Materials: Decision-Making towards Low Carbon Housing Constructions

Material considerations are essential while trying to achieve low energy and carbon constructions. According to our preliminary findings, decisions regarding materials in new buildings are mostly done by clients or by self-builders often without the aid of an architect or planner. Therefore, community studies are important to understand today’s building dynamics. In this exploratory study - carried out in USA and Mexico - we analysed the public’s preferences for building materials for the exterior of dwellings and the factors that have more influence over their decisions while choosing the materials. We also studied the update in the subjects’ preference after receiving certain information concerning the materials. We wanted to know if the environmental factors play an important role in today's public preference in the building sector and what type of information could greater affect their beliefs. Preliminary results for Mexico and after a follow up analysis for USA show that acknowledging unfamiliar information (e.g. carbon emissions or price) might have a greater influence on the public’s update of preference of materials. This could have implications for the construction market dynamics in the usage promotion of low carbon building materials. KEYWORDS: Building materials, decision-making, low carbon, social cognitio

A recommender system for process discovery

Over the last decade, several algorithms for process discovery and process conformance have been proposed. Still, it is well-accepted that there is no dominant algorithm in any of these two disciplines, and then it is often difficult to apply them successfully. Most of these algorithms need a close-to expert knowledge in order to be applied satisfactorily. In this paper, we present a recommender system that uses portfolio-based algorithm selection strategies to face the following problems: to find the best discovery algorithm for the data at hand, and to allow bridging the gap between general users and process mining algorithms. Experiments performed with the developed tool witness the usefulness of the approach for a variety of instances.Peer ReviewedPostprint (author’s final draft

On the interplay between the loop-tree duality and helicity amplitudes

The spinor-helicity formalism has proven to be very efficient in the calculation of scattering amplitudes in quantum field theory, while the loop tree duality (LTD) representation of multi-loop integrals exhibits appealing and interesting advantages with respect to other approaches. In view of the most recent developments in LTD, we exploit the synergies with the spinor-helicity formalism to analyse illustrative one- and two-loop scattering processes. We focus our discussion on the local UV renormalisation of IR and UV finite amplitudes and present a fully automated numerical implementation that provides efficient expressions which are integrable directly in four space-time dimensions.Comment: 12 pages, 5 figures. In v2: discussion on the application of two-loop local renormalisation added; references update

To dd, or not to dd: Recent developments and comparisons of regularization schemes

We give an introduction to several regularization schemes that deal with ultraviolet and infrared singularities appearing in higher-order computations in quantum field theories. Comparing the computation of simple quantities in the various schemes, we point out similarities and differences between them.Comment: 61 pages, 12 figures; version sent to EPJC, references update