Effect of Oak Chip Addition at Different Winemaking Stages on Phenolic Composition of Moravia Agria Red Wines

This study compared changes in the phenolic composition of Moravia Agria wine and its effect on colour,co-pigmentation as well as on physicochemical properties, such as antioxidant capacity, caused by addingoak chips at different stages of the winemaking process. Moravia Agria control wine was made followingtraditional winemaking processes, without oak chips. Oak chips were added to the rest of the wines attwo dose rates (3 and 6 g/L) at different stages of the winemaking process: for one week during alcoholicfermentation, during malolactic fermentation and in young red Moravia Agria wine. Only slight significantdifferences were found in phenolic composition, antioxidant activity and chromatic characteristics betweenthe Moravia Agria wines treated with oak chips and the control wine. However, oak chip addition slightlydecreased the content of non-polymeric red pigments (monomeric anthocyanins and pyranoanthocyanins)and also of resveratrol-monomer stilbenes. It is suggested that oak chip addition to Moravia Agria winescan be selected as part of the targeted sensory profile (relative intensity of sensory descriptors providedby grape and oak wood), since only a few changes have been observed in the phenolic profiles, antioxidantcapacity value and colour characteristics

Efecto de la coaplicación de herbicidas y adición de alperujo como enmienda en el comportamiento de diurón y terbutilazina en un suelo arcillo-limoso

Congreso celebrado del 21-24 de septiembre 2010, en Granada, España.Los herbicidas se aplican a los cultivos como formulaciones que habitualmente incluyen más de un principio activo. Sin embargo, los estudios sobre comportamiento de herbicidas en suelos en el laboratorio suelen hacerse aplicando los herbicidas de forma individual.Peer reviewe

Die Wettbewerbsfähigkeit der arabischen Mittelmeerländer im internationalen Vergleich

6 p.- Papers presented at the International Workshop "The Conservation of Subterranean Cultural Heritage", held 25-27 March 2014, in Seville, Spain.Paranhos constitutes one of the main water galleries excavated in the granite substratum of Porto City (Portugal) to gather the groundwater for public use during the past five centuries. This gallery is a Subterranean Cultural Heritage site with a potential use for underground geotourism under safe conditions. An environmental monitoring programme has been conducte in the site comprising rapid multi-parameters. This programme has allowed the identification of urban-induced causes of contamination of the aquifer and internal tunnel atmosphere (waste-water and gas leakage). This study has also comprised the determination of effective radioactive dose in different sectors of the tunnel for potential visitors based on 222Rn studies.Financiado con el Proyecto (HAR-2010-11432-E) Red de Ciencia y Tecnología para la Conservación del Patrimonio CulturalPeer reviewe

Influence of the micro-oxygenation dose and supplementation with oak staves of different potential of ellagitannin release on wine color and composition

Aliquots of a wine of Merlot were micro-oxygenated at two doses of oxygen (2.5 and 5.0 mg of O2/L.month) in the presence or not of oak staves of different potential ellagitannin release (PER) for three months. In general, micro-oxygenation increased the color intensity and stability probably because favor the formation of new pigments. The presence of staves increased the total phenolic index and the ellagitannin concentration, and this effect was higher when greater was the PER of the staves. Finally, the dose of microoxygenation only affects the concentration of total furanic compounds whereas the PER of the staves seems to determine the concentration of furanic compounds, volatile phenols and β-methyl-γ-octolactones

Characterization of the phenolic ripening development of "BRS Vitoria" seedless table grapes using HPLC-DAD-ESI-MS/MS.

Determining the harvest date of table grapes is very important to achieve high-quality bunches with adequate soluble solids content, low titratable acidity, and high concentrations of polyphenols. Table grape consumption has increased worldwide due to its phenolic compound content and its beneficial effects on human health. Thus, this study aimed to characterize the phenolic ripening of ?BRS Vitoria? seedless table grapes at different ripening stages using HPLC?DAD?ESI-MS/MS. For this purpose, a trial was carried out during 2016 in a commercial vineyard of ?BRS Vitoria? seedless grape located in Marialva, state of Parana (Southern Brazil). Berry samples were assessed weekly, starting at v ́eraison until full ripeness. At each ripening stage, the berries were analyzed to determine their physicochemical characteristics and polyphenolic profile. It was observed that ?BRS Vitoria? grapes can be harvested approximately 28 days after v ́eraison, when the berries reach soluble solids content higher than 15◦Brix and low titratable acidity. The grapes presented a typical anthocyanin profile of hybrid grapes, composed of 3-glucoside and 3,5-diglucoside derivatives. In addition, pelargonidin traces were also observed, and this aglycone is rarely detected in grapes. The total anthocyanin concentration, as malvidin-3,5- diglucoside equivalents, is close to 596.9 mg k

Removal of trinitrophenol from water by a layered double hydroxide

6 páginas, 4 tablas, 6 referencias.-- [email protected] aim of this work was to explore the potential use of the hydrotalcite compound [Mg3Al(OH)(8)]CO3.xH(2)O, (HT), and its calcined productMg3AlO4(OH), (HT500), as sorbents of 2,4,6-trinitrophenol (TNP). The amounts of TNP removed by HT depends on the pH, whereas those removed by HT500 depends on solid/solution ratio.This paper has been partially supported by CICYT Projects NAT 91-1336 and AMB 93-0097.Peer Reviewe

Efecto de la adición de un residuo orgánico a suelos agrícolas en el comportamiento de los herbicidas bentazona y s-metolacloro

9 páginas, 3 figuras, 3 tablas, 14 referencias.-- A. I. Cañero agradece también su beca FPI del MINCIN.El uso repetitivo y en exceso de plaguicidas, en especial de herbicidas, ha despertado la necesidad de conocer en profundidad el comportamiento de estas sustancias en el sistema de suelo, con el fin de reducir su difusión hacia compartimentos donde no estaban destinados aparecieran, como son las aguas subterráneas.Este trabajo ha sido financiado por los Proyectos AGL 2007-65771 y AGL2010-21421 del Ministerio de Ciencia e Innovación y por el grupo de investigación AGR 264 de la Junta de Andalucía.Peer reviewe

Hydrotalcite-like compounds as potential sorbents of phenols from water

Hydrotalcite-like compounds, being anti-types of clay minerals, are potential sorbents for polar and anionic molecules. This work summarizes the experimental results of adsorption-desorption of two phenols (trichlorophenol, TCP, and trinitrophenol, TNP) on an hydrotalcite (HT) and its calcined product (HT500). Both phenols are adsorbed on HT by anion exchange, but TNP adsorption was much higher than that of TCP due to their different pKa. The adsorption of both phenols on HT500 occurs by the reconstruction of the layered structure, TNP being also adsorbed at more than TCP. These adsorption mechanisms were confirmed by X-ray diffraction, IR spectroscopy and TG-DTA analysis of the HT-TCP and HT-TNP products. Results presented here indicate HT500 as potential sorbent for phenols from waters, and that its recyclability is possible.Peer Reviewe

Efectos de la contaminación atmosférica sobre piedra arenisca de la Diputación provincial de Gipuzkoa

Cartel presentado en la XXX Reunión Científica del Grupo de Cromatografía y Técnicas Afines - GCTA 2001 Burjassot, Valéncia, 18 a 20 de Abril de 2001Peer Reviewe