Characterization of the high temperature fracture of He-implanted 1.4970 austenitic stainless steel

The Ti-stabilized DIN 1.4970 austenitic stainless steel is an important candidate for high temperature - high neutron fluence applications which will create appreciable amounts of He within the matrix. In order to determine the mechanical effects associatedwith the presence of He alone a set of tensile specimens was cyclotron implanted to uniform He concentrations in the 10$^{-6}$ to 10$^{-4}$/at. range and later creep tested at 700 and 800 °C. It was found that the elongation to fracture value of the implantedspecimens were reduced with respect to those of unimplanted controls. Scanning electron microscope examination evealed that fracture starts as intergranular and subsequently propagates in a transgranular fashion, the intergranular part being much more extended in the implanted material. Cavities appearing in the fractured grain boundaries of the implanted specimens were associated with grain boundary chromium carbide precipitates. Transmission electron micrsocope examination of the creep specimens and of foils annealed at temperatures between 800 and 1000° C after implantation revealed that He segregated as bubbles in the matrix, at the grain boundaries and at intergranular precipitates. A mechanism of He induced cavitation is discussed which accounts for the observed loss of ductility. Changes in the mode of crack propagation during fracture are attributed to geometrical factors and tensile loading characteristics

Evaluation of grape stems and grape stem extracts for sulfur dioxide replacement during grape wine production

Supplementary data to this article can be found online at https://doi.org/10.1016/j.crfs.2023.100453.Sulfur dioxide (SO2), the main preservative in wine, may affect the sensory properties of the wines, as well as cause allergic reactions and headaches in sensitive people. The aim of this work was to evaluate the replacement of SO2 in Tempranillo wines with Mazuelo grape stem products. Five Tempranillo red wines were elaborated: positive control (60 mg/L SO2); negative control with no preservatives; Mazuelo extract (200 mg/L); Mazuelo extract combined with SO2 (100 mg/L + 20 mg/L); and Mazuelo stem (400 mg/L). The oenological parameters, antioxidant capacity, total phenolic (TP), total flavonoids (TF) and total anthocyanins (TA) contents were determined. Additionally, individual phenols were analyzed by HPLC-DAD-FLD. The spectrophotometric analyses showed that the wines had similar antioxidant capacities and concentrations of TP and TF. However, TA was more affected by the lack of SO2 as anthocyanins presented higher concentrations in positive control samples. The concentrations of individual phenols followed a similar path in all samples. Wines containing sulfites were more similar than the other treatments. However, these similarities were not reflected on the sensory analysis performed, as triangle test did not show differences between the wine with extract addition and the positive control wine. Therefore, Mazuelo stem extract could be a possible strategy for SO2 replacement. Nevertheless, further studies are necessary to confirm the potential of grape stem extracts as wine preservative.This study was also supported by the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UIDB/04469/2020 unit, and by the European Regional Development Fund (ERDF) through the Competitiveness factors Operational program – Norte 2020, COMPETE and by National Funds through the FCT - under the project AgriFood XXI (NORTE- 01-0145-FEDER-000041).info:eu-repo/semantics/publishedVersio

¿Cuánto ocupan las instalaciones en un edificio?

Tras el título de este estudio surgen otras preguntas tales como ¿qué instalaciones? ¿en qué tipologías de edificios? ¿no existen acaso ya estudios de los que obtener estos datos? ¿cómo se realiza un estudio de estas características? ¿son fiables los datos que se obtengan? ¿para que sirven estos datos a un profesional que diseñe las instalaciones de un edificio? Estas son las preguntas que se contestan a lo largo del texto

¿Cuánto ocupan las instalaciones en un edificio?

Tras el título de este estudio surgen otras preguntas tales como ¿qué instalaciones? ¿en qué tipologías de edificios? ¿no existen acaso ya estudios de los que obtener estos datos? ¿cómo se realiza un estudio de estas características? ¿son fiables los datos que se obtengan? ¿para que sirven estos datos a un profesional que diseñe las instalaciones de un edificio? Estas son las preguntas que se contestan a lo largo del texto

La gran diversitat varietal de vinya a Espanya, en procés de descobriment

[Otro] En la darrera decada, les varietats minoritaries de vinyes han anat guanyant interes a Europa i s'ha endegat un projecte a gran escala per catalogar-les. D'aquí la importancia del coneixement detallat del patrimoni vitícola varietalAgraïm a l'Institut Nacional d'Investigació i 'Tecnologia Agraria i Alimentaria (INIA) i als fons FEDER el finançament d'aquest treballa través del projecte RF2012- 00027-C5-00.Muñoz Organero, G.; De Andrés, MT.; Vargas, A.; Aller, M.; Serrano, MJ.; Cretazzo, E.; Pérez, JA.... (2017). La gran diversitat varietal de vinya a Espanya, en procés de descobriment. ACE. Revista d'Enologia. Associació Catalana d'Enòlegs. (105):13-17. http://hdl.handle.net/10251/101065S131710