Now showing items 21-40 of 1212

    • A rapid and reliable direct method for quantifying meat acylglycerides with monomode microwave irradiation 

      Tomàs, Albert; Tor i Naudí, Marc; Villorbina Noguera, Gemma; Canela i Garayoa, Ramon; Balcells Fluvià, Mercè; Eras i Joli, Jordi (Elsevier, 2009)
      A rapid methodology for direct analysis of meat acylglycerides is proposed. A transesterification is carried out in a microwave reactor consisting of a monomode oven using chlorotrimethylsilane (CTMS) and methanol. ...
    • A tandem Finkelstein-rearrangement–elimination reaction: a straightforward synthetic route to allyl esters 

      Eras i Joli, Jordi; Escribà i Gelonch, Marc; Villorbina Noguera, Gemma; Oromí Farrús, Mireia; Balcells Fluvià, Mercè; Canela i Garayoa, Ramon (Elsevier, 2009)
      Allyl esters can be obtained by a Finkelstein-rearrangement–elimination reaction of 2-chloro-1-(chloromethyl)ethyl esters induced by NaI. Sodium iodide can be used below equivalence using a reductive agent as sodium ...
    • Distribuição de líquido da ponta de pulverização com indução de ar e jato excêntrico AIUB 8502 sob diferentes condições 

      Viana, R.G.; Ferreira, L.R.; Rosell Polo, Joan Ramon; Solanelles Batlle, Francesc; Filat, A.; Machado, M.S.; Machado, A.F.L.; Silva, M.C.C. (Sociedade Brasileira da Ciência das Plantas Daninhas, 2010)
      Objetivou-se com este trabalho avaliar a distribuição de líquido da ponta de pulverização com indução de ar e jato excêntrico AIUB 8502 sob diferentes condições operacionais. Foram avaliados perfil individual, vazão, ângulo ...
    • Distribuição volumétrica e espectro de gotas de pontas de pulverização de baixa deriva 

      Viana, R.G.; Ferreira, L.R.; Ferreira, M.C.; Teixeira, M.M.; Rosell Polo, Joan Ramon; Tuffi Santos, L.D.; Machado, A.F.L. (Sociedade Brasileira da Ciência das Plantas Daninhas, 2010)
      Objetivou-se neste trabalho avaliar a distribuição volumétrica e o espectro de gotas das pontas de pulverização de baixa deriva TTI110015, AI110015 e AVI11001 sob diferentes condições operacionais. A distribuição volumétrica ...
    • Protocolo para la zonificación intraparcelaria de la viña para vendimia selectiva a partir de imágenes multiespectratrales 

      Martínez Casasnovas, José Antonio; Agelet Fernández, J.; Arnó Satorra, Jaume; Bordes Aymerich, Xavier; Ramos Martín, Ma. C. (Ma. Concepción) (Asociación Española de Teledetección, 2010)
      En este trabajo se presenta un protocolo para la zonificación intraparcelaria de la viña con la finalidad de vendimia selectiva. Se basa en la adquisición de una imagen multiespectral detallada en el momento del envero, a ...
    • Characterisation of emergence of autumn and spring cohorts of Galium spp. in winter cereals 

      Royo-Esnal, Aritz; Torra Farré, Joel; Conesa i Mor, Josep A. (Josep Antoni); Recasens i Guinjuan, Jordi (European Weed Research Society, 2010)
      The emergence of three artificial cohorts of Galium aparine, G. spurium and G. tricornutum with different accessions was studied over two years under the climatic conditions of north-eastern Spain. Seeds were sown in ...
    • Susceptibility to organophosphate insecticides and activity of detoxifying enzymes in Spanish populations of Cydia pomonella (Lepidoptera: Tortricidae) 

      Rodríguez García, Marcela; Bosch Serra, Dolors; Sauphanor, Benoit; Avilla Hernández, Jesús (Entomological Society of America, 2010)
      The mechanisms associated with resistance of codling moth (Cydia pomonella (L.)) to organophosphate insecticides in pome fruit orchards have been shown to depend on the area. Our objectives were to evaluate the susceptibility ...
    • Aflatoxins and ochratoxin A in pistachios sampled in Spain: occurrence and presence of mycotoxigenic fungi 

      Fernane, F.; Cano Sancho, German; Sanchís Almenar, Vicente; Marín Sillué, Sònia; Ramos Girona, Antonio J. (Taylor & Francis, 2010)
      A survey of the fungal contamination and occurrence of aflatoxins and ochratoxin A (OTA) in 50 pistachio nutsamples collected from commercial stores around Catalonia (Spain) was carried out.Aspergillus flavuswas foundin ...
    • Determination of the iodine value of biodiesel using 1H NMR with 1,4-dioxane as an internal standard 

      Oromí Farrús, Mireia; Villorbina Noguera, Gemma; Eras i Joli, Jordi; Gatius Cortiella, Ferran; Torres i Grifo, Mercè; Canela i Garayoa, Ramon (Elsevier, 2010)
      Iodine values (IVs) of some biodiesel samples were analyzed using both 1H NMR and a standard iodometric method. 1H NMR was carried out with and without 1,4-dioxane as an internal standard (IS). The results obtained using ...
    • When more is better: multigene engineering in plants 

      Naqvi, Shaista; Farré Martinez, Gemma; Sanahuja Solsona, Georgina; Capell Capell, Teresa; Zhu, Changfu; Christou, Paul (Elsevier, 2010)
      The genomics revolution has taught us that a great deal of information can be derived from studying many genes or proteins at the same time. We are beginning to see this approach blossoming in applied research. Instead ...
    • Sensitivity of tree volume measurement to trajectory errors from a terrestrial LIDAR scanner 

      Pallejà Cabrè, Tomàs; Tresánchez Ribes, Marcel; Teixidó Cairol, Mercè; Sanz Cortiella, Ricardo; Rosell Polo, Joan Ramon; Palacín Roca, Jordi (Elsevier, 2010)
      The use of terrestrial LIDARs in agriculture enables the measurement of structural parameters of the orchards such as the volume of the trees. The sequence of two-dimensional scans performed with a LIDAR attached to a ...
    • Variable rate dosing in precision viticulture: Use of electronic devices to improve application efficiency 

      Llorens Calveras, Jordi; Gil Moya, Emilio; Llop, Jordi; Escolà i Agustí, Alexandre (Elsevier, 2010-03)
      Two different spray application methods were compared in three vine varieties at different crop stages. A conventional spray application with a constant volume rate per unit ground area (1 ha(-1)) was compared with a ...
    • Weed discrimination using ultrasonic sensors 

      Andújar, Dionisio; Escolà i Agustí, Alexandre; Dorado, José; Fernández-Quintanilla, César (John Wiley & Sons, 2011)
      A new approach is described for automatic discrimination between grasses and broad-leaved weeds, based on their heights. An ultrasonic sensor was mounted on the front of a tractor, pointing vertically down in the inter-row ...
    • Clustering of grape yield maps to delineate site-specific management zones 

      Arnó Satorra, Jaume; Martínez Casasnovas, José Antonio; Ribes Dasi, Manuel; Rosell Polo, Joan Ramon (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2011)
      Zonal management in vineyards requires the prior delineation of stable yield zones within the parcel. Among the different methodologies used for zone delineation, cluster analysis of yield data from several years is one ...
    • Innovative LIDAR 3D dynamic measurement system to estimate fruit-tree leaf area 

      Sanz Cortiella, Ricardo; Llorens Calveras, Jordi; Escolà i Agustí, Alexandre; Arnó Satorra, Jaume; Ribes Dasi, Manuel; Masip Vilalta, Joan; Camp, Ferran; Gràcia Aguilà, Felipe José; Solanelles Batlle, Francesc; Planas de Martí, Santiago; Pallejà Cabrè, Tomàs; Palacín Roca, Jordi; Gregorio López, Eduard; Del Moral Martínez, Ignacio; Rosell Polo, Joan Ramon (Molecular Diversity Preservation International (MDPI), 2011)
      In this work, a LIDAR-based 3D Dynamic Measurement System is presented and evaluated for the geometric characterization of tree crops. Using this measurement system, trees were scanned from two opposing sides to obtain two ...
    • Performance of an ultrasonic ranging sensor in apple tree canopies 

      Escolà i Agustí, Alexandre; Planas de Martí, Santiago; Rosell Polo, Joan Ramon; Pomar Gomà, Jesús; Camp, Ferran; Solanelles Batlle, Francesc; Gràcia, Felip; Llorens Calveras, Jordi; Gil Moya, Emilio (Molecular Diversity Preservation International (MDPI), 2011)
      Electronic canopy characterization is an important issue in tree crop management. Ultrasonic and optical sensors are the most used for this purpose. The objective of this work was to assess the performance of an ultrasonic ...
    • Characterisation of the LMS200 laser beam under the influence of blockage surfaces. Influence on 3D scanning of tree orchards 

      Sanz Cortiella, Ricardo; Llorens Calveras, Jordi; Rosell Polo, Joan Ramon; Gregorio López, Eduard; Palacín Roca, Jordi (Molecular Diversity Preservation International (MDPI), 2011)
      The geometric characterisation of tree orchards is a high-precision activity comprising the accurate measurement and knowledge of the geometry and structure of the trees. Different types of sensors can be used to perform ...
    • Ultrasonic and LIDAR sensors for electronic canopy characterization in vineyards: advances to improve pesticide application methods 

      Llorens Calveras, Jordi; Gil Moya, Emilio; Llop, Jordi; Escolà i Agustí, Alexandre (Molecular Diversity Preservation International (MDPI), 2011)
      Canopy characterization is a key factor to improve pesticide application methods in tree crops and vineyards. Development of quick, easy and efficient methods to determine the fundamental parameters used to characterize ...
    • Resistance of Spanish codling moth (Cydia pomonella) populations to insecticides and activity of detoxifying enzymatic systems 

      Rodríguez García, Marcela; Bosch Serra, Dolors; Avilla Hernández, Jesús (The Netherlands Entomological Society, 2011)
      Resistance of codling moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae) to insecticides has become a major problem in many apple and pear production areas. Our aim was to determine the level of insecticide resistance ...
    • Evaluation of peach tree growth characteristics under different irrigation strategies by LIDAR system: preliminary results 

      Pascual Roca, Miquel; Villar Mir, Josep Ma.; Rufat i Lamarca, Josep; Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Arnó Satorra, Jaume (International Society for Horticultural Science (ISHS), 2011)
      In a four-year experiment on peach (Prunus persica L. Batsch ‘Andross’) for fruit processing, canopy volume and tree shape were evaluated by scanning trees with a Light Detection and Ranging (LIDAR) system: a non-destructive ...