Productos y Procesos

Técnicas de elaboración

17 octubre, 2015

How do esters and dimethyl sulphide concentrations affect fruity aroma perception of red wine? Demonstration by dynamic sensory profile evaluation.

Our study focused on variations in wine aroma perception and molecular composition during tasting over a period of 30min. In parallel, dynamic analytical and sensory methods were applied to study changes in the wines’ molecular and aromatic evolution. Dynamic sensory profile evaluations clearly confirmed the evolution of the wine’s fruity notes during sensory analysis, highlighting significant differences for red-berry and fresh fruit as well as black berry and jammy fruit, after 5 and 15min, respectively. Dynamic analytical methods revealed a decrease in ester and dimethyl sulphide (DMS) concentrations in the

Técnicas de elaboración

17 octubre, 2015

Various instrumental approaches for determination of organic acids in wines.

Biosensors based on lactate oxidase, sarcosine oxidase and mixture of fumarase and sarcosine oxidase were used for monitoring of organic acids in wine samples. Additionally, tartaric acid was determined by modified colorimetric method based on formation of the vanadate-tartrate complex. The above mentioned methods were used for the analysis of 31 wine samples and obtained data were compared with the results from capillary electrophoresis as a basic standard method. This comparison showed a certain degree of correlation between biosensors and capillary electrophoresis. The provided information pointed to the potential uses

Tratamiento de efluentes

16 octubre, 2015

Un estudio propone el uso de aguas residuales para regar viñedos

Un estudio propone el uso de aguas residuales para regar viñedos

Manejo cultural

16 octubre, 2015

Un paso importante hacia el nuevo reglamento de agricultura ecológica

La Eurocámara ha aprobado esta semana el texto que fija su postura para iniciar este otoño las negociaciones de cara a definir el contenido del nuevo reglamento de la agricultura ecológica.

Manejo cultural

16 octubre, 2015

Grape Juice as a Bait for Anastrepha suspensa (Diptera: Tephritidae) and Zaprionus indianus (Diptera: Drosophilidae).

In field tests conducted in south Florida to testgrape juice as a bait for the Caribbean fruit fly, Anastrepha suspensa Loew, high numbers of Zaprionus indianus Gupta were captured in traps with aqueousgrape juice. These experiments included comparisons ofgrape juice bait with established A. suspensa protein-based baits (ammonium acetate + putrescine lures, or torula yeast) or wine, a bait found previously to be attractive to Z. indianus. Effects of different preservatives (polypropylene glycol, polyethylene glycol, proxel, or sodium tetraborate) and bait age were also tested. Traps withgrape juice baits captured

Parametros de Calidad

15 octubre, 2015

The truth about red wine’s health benefits

“To sort this out, I combed through more than 30 studies and spoke to five researchers who’ve studied the health benefits and risks of alcohol”

Equipamiento

15 octubre, 2015

Los cinco productos innovadores con medalla de plata en el Palmarés de Sitevi 2015

Cinco productos han sido los distinguidos con la Medalla de Plata en el Palmarés de Sitevi 2015. Este Salón Internacional de la Viña, el Vino, las Frutas y las Verduras se celebrará en el Parque de Exposiciones de Montpellier (Francia) del 24 al 26 de noviembre y con este concurso premia los equipamientos y productos […

Manejo cultural

15 octubre, 2015

High-Tech Sensor System Allows For Precision Irrigation

A new product will allow grape and nut growers to keep a constant watch on leaf moisture for improved irrigation management. Continuous Leaf Monitor (LeafMon) is a suite of sensors that detect plant water status, explains Shrinivasa Upadhyaya, professor in the Department of Biological and Agricultural Engineering at the University of California-Davis. LeafMon allows growers to base irrigation decisions on an actual measure of plant water status. “In particular, it has a thermal IR sensor to measure leaf temperature, and air temperature, relative humidity, wind speed and Photosynthetically Active Radiation

Manejo cultural

14 octubre, 2015

Dos estudios se centran en la persistencia de plaguicidas en los viñedos de Rioja

Investigadores de la Universidad de La Rioja (UR) y del Instituto de Recursos Naturales y Agrobiología de Salamanca (IRNASA-CSIC) han publicado dos artículos sobre la evolución de los residuos de plaguicidas en los viñedos de La Rioja. Investigadores de la Universidad de La Rioja (UR) y el Instituto de Recursos Naturales y Agrobiología de Salamanca […

Parametros de Calidad

13 octubre, 2015

Las naciones de la UE tratan de prohibir los cultivos transgénicos

Diecinueve de los 28 estados miembros de la UE han aplicado para mantener los cultivos modificados genéticamente fuera de todo o parte de su territorio. El brazo ejecutivo del bloque dijo el domingo, la fecha límite para la exclusión voluntaria de la nueva legislación europea sobre los cultivos transgénicos. Las naciones de la UE tenían hasta el 3 de Octubre para buscar una opción de exclusión que les daría la posibilidad de prohibir los cultivos transgénicos ya autorizados como seguro para el cultivo, o en estudio, por la Unión Europea.

Parametros de Calidad

13 octubre, 2015

Glass of wine a day could help battle diabetes

Scientists in Israel have hailed the benefits of drinking a glass of red wine every day, which could help people with type 2 diabetes manage their cholesterol and cardiac health.

Manejo cultural

13 octubre, 2015

How to Spot Grapevine Viruses

Lodi grapegrowers explore cost-effective visual ID for red blotch

Manejo cultural

12 octubre, 2015

Developmental, transcriptome, and genetic alterations associated with parthenocarpy in the grapevine seedless somatic variant Corinto bianco.

Seedlessness is a relevant trait in grapevine cultivars intended for fresh consumption or raisin production. Previous DNA marker analysis indicated that Corinto bianco (CB) is a parthenocarpic somatic variant of the seeded cultivar Pedro Ximenes (PX). This study compared both variant lines to determine the basis of this parthenocarpic phenotype. At maturity, CB seedless berries were 6-fold smaller than PX berries. The macrogametophyte was absent from CB ovules, and CB was also pollen sterile. Occasionally, one seed developed in 1.6% of CB berries. Microsatellite genotyping and flow cytometry analyses of

Técnicas de elaboración

12 octubre, 2015

Científicos de la UVa logran aumentar la solubilidad en agua de la quercetina

El Grupo de Procesos a Alta Presión trabaja en un proyecto europeo del VII Programa Marco que trata de mejorar la extracción de este y otros compuestos presentes en los hollejos de la uva y desarrollar nuevas formulaciones más solubles. Investigadores del Grupo de Procesos a Alta Presión de la Universidad de Valladolid (UVa) han realizado importantes avances en el desarrollo de formulaciones de quercetina con mejor solubilidad. El equipo de la UVa en colaboración con colegas de Holanda y Portugal, ha sido capaz de aumentar más de cien veces

Manejo cultural

10 octubre, 2015

Three years analysis of Lobesia botrana (Lepidoptera: Tortricidae) flight activity in a quarantined area

Abstract Lobesia botrana (Denis & Schiffermüller)(Lepidoptera: Tortricidae), isan important vineyard-pest in the European and Mediterranean areas and it was recentlydescribed in Argentina and Chile. Since knowledge on the L. botrana phenology on …

Técnicas de elaboración

10 octubre, 2015

Polyphenolic Contents and Antioxidant Activities of Underutilized Grape (Vitis vinifera L.) Pomace Extracts.

Grape pomace is an abundant source of underutilized winery by-products. Polyphenols were extracted fromgrape pomace using cellulase and gluco-amylase enzymes. 2,2-diphenyl-1-picrylhydrazyl (DPPH) and Folin-Ciocalteu’s assays were used to measure antioxidant activity and total polyphenolic contents. Both cellulase, and gluco-amylase digestedgrape pomace showed efficient radical scavenging activity. In addition, the total polyphenolic contents of cellulase digestedgrape pomace showed lower concentrations were effective compared to higher concentrations, whereas gluco-amylase enzyme did not show remarkable variations. The DPPH radical scavenging activity and total polyphenolic contents were significantly higher in the cellulase digestedgrape pomace

Técnicas de elaboración

9 octubre, 2015

Investigation and Sensory Characterization of 1,4-Cineole: A Potential Aromatic Marker of Australian Cabernet Sauvignon Wine.

This work reports the quantitation and sensory characterization of 1,4-cineole in red wine for the first time. A headspace-solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) method was developed to quantitate 1,4-cineole and 1,8-cineole in 104 commercial Australian red wines. 1,4-Cineole was detected in all of the wines analyzed, with concentrations ranging from 0.023 to 1.6 μg/L. An important varietal effect was observed, with concentrations of 1,4-cineole in Cabernet Sauvignon wines (mean of 0.6 ± 0.3 μg/L) significantly higher than in Shiraz (0.07 ± 0.04 μg/L) and Pinot Noir (0.2 ± 0.2 μg/L)

Cosecha

9 octubre, 2015

Online yield forecasting tool hungry for data

Drs Steve Van Sluyter and Alex Ferry from Macquarie University are one year into a three-year, Wine Australia-funded project designed to develop an online tool for predicting yields at the block level that could eventually be adapted to any region and grape style.They know about the Barossa because that’s where most of their initial data has come from, courtesy of Treasury Wine Estates. They now need more – and more varied – data for two reasons.The first is that a reliable tool for a given region will need key data

Parametros de Calidad

9 octubre, 2015

Sauvignon Scam Rocks Friuli Wine

Another scandal hits Italy’s wine industry, as investigations continue into the use of illegal additives.

Equipamiento

9 octubre, 2015

Codificador de alto rendimiento amplía las capacidades CIJ

Linx Printing Technologies ha puesto en marcha la Linx 8900, una impresora CIJ próxima generación (chorro de tinta continuo) que ofrece los más altos niveles de facilidad de uso y ayuda a maximizar la eficiencia en la producción, la entrega de valiosos ahorros de costes y de tiempo. Capaz de imprimir tanto códigos humanos como de lectura mecánica, la Linx 8900 incorpora una gran cantidad de nuevas características que aceleran el funcionamiento y el mantenimiento del día a día, en combinación con la reconocida fiabilidad Linx que garantiza un rendimiento