Now showing items 1-20 of 838

    • Assessment of Recycling Tunnel Sprayers in Mediterranean Vineyards and Apple Orchards 

      Planas de Martí, Santiago; Solanelles Batlle, Francesc; Fillat, A. (Elsevier, 2002)
      The use of air-assisted recycling tunnel sprayers in Mediterranean fruit orchards and vineyards was assessed by comparing the performance of two tunnel sprayer prototypes with an air-assisted axial flow sprayer. Field ...
    • Center-pivot automatization for agrochemical use 

      Palacín Roca, Jordi; Salse, José Antonio; Clua, Xavier; Arnó Satorra, Jaume; Blanco Ortiz, Ricardo; Zanuy, C. (Elsevier, 2005)
      This paper presents an agrochemical application system that could be incorporated into existing irrigating center-pivots. The system consisted of a hydraulic circuit with emitters, where the dose was individually controlled ...
    • An Electronic Control System for Pesticide Application Proportional to the Canopy Width of Tree Crops 

      Solanelles Batlle, Francesc; Escolà i Agustí, Alexandre; Planas de Martí, Santiago; Rosell Polo, Joan Ramon; Camp, Ferran; Gràcia, Felip (Elsevier, 2006)
      A prototype of an electronic control system based on ultrasonic sensors and proportional solenoid valves for a proportional application to the canopy width of tree crops was mounted on an air-assisted sprayer. The sprayer ...
    • Variable rate application of plant protection products in vineyard using ultrasonic sensors 

      Gil Moya, Emilio; Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon; Planas de Martí, Santiago; Val, Luis (Elsevier, 2007)
      The changes in the shape and size of vines during the growing season require a continuous adjustment of the applied dose to optimize spray application efficiency. Target detection with ultrasonic sensors can be used to ...
    • Combining regio- and enantioselectivity of lipases for the preparation of (R)-4-chloro-2-butanol 

      Méndez, Jonh Jairo; Oromí Farrús, Mireia; Cervero, Maria; Balcells Fluvià, Mercè; Torres i Grifo, Mercè; Canela i Garayoa, Ramon (Wiley, 2007)
      Preparation of 98% ee (R)-4-chloro-2-butanol was carried out by the enzymatic hydrolysis of chlorohydrin esters, using fungal resting cells and commercial enzymes. Hydrolyzes were carried out using lipases from Candida ...
    • Glycerol as a starting material to prepare palmitate derivatives 

      Eras i Joli, Jordi; Balcells Fluvià, Mercè; Canela i Garayoa, Ramon (Asociación de Químicos e Ingenieros del Instituto Químico de Sarriá, 2007)
      Glycidyl palmitate, used to obtain high purity monoglycerides and epoxy resins, can be obtained from glycerol using a two-step process. The first step of this new approach consists in a reaction of esterification-chlorination ...
    • Climate factors affecting conception rate of high producing dairy cows in northeastern Spain 

      García Ispierto, Irina; López Gatius, Fernando; Bech Sàbat, Gregori; Santolaria Blasco, Pilar; Yániz Pérez de Albéniz, Jesús; Nogareda, Carmina; De Rensis, F.; López-Béjar, M. (Elsevier, 2007)
      Summer heat stress is a main factor related to low conception rate in high producing dairy herds in warm areas worldwide. We assessed the impact of several climate variables on conception rate in high producing dairy cows ...
    • Dynamics of anti-Neospora caninum antibodies during gestation in chronically infected dairy cows 

      Nogareda, Carmina; López Gatius, Fernando; Santolaria Blasco, Pilar; García Ispierto, Irina; Bech Sàbat, Gregori; Pabón, M.; Mezo, M.; Gonzalez-Warleta, M.; Castro Hermida, J. A.; Yániz Pérez de Albéniz, Jesús; Almería, S. (Elsevier, 2007)
      The dynamics of antibody production against Neospora caninum during the gestation period was examined in chronically infected dairy cows. Data were obtained from 86 pregnant parous dairy cows, 21 of which had suffered ...
    • Real-time tree-foliage surface estimation using a ground laser scanner 

      Palacín Roca, Jordi; Pallejà Cabrè, Tomàs; Tresánchez Ribes, Marcel; Ribes Dasi, Manuel; Llorens Calveras, Jordi; Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Masip Vilalta, Joan; Arnó Satorra, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2007)
      The optimization of most pesticide and fertilizer applications is based on overall grove conditions. In this work we measurements. Recently, Wei [9, 10] used a terrestrial propose a measurement system based on a ground ...
    • Edible coatings with antibrowning agents to maintain sensory quality and antioxidant properties of fresh-cut pears 

      Oms Oliu, Gemma; Soliva-Fortuny, Robert; Martín Belloso, Olga (Elsevier, 2008)
      The effect of alginate-based (2%, w/v), pectin-based (2%, w/v) and gellan-based (0.5%, w/v) edible coatings containing N-acetylcysteine at 0.75% (w/v) and glutathione at 0.75% (w/v) on gas exchange, antioxidant properties, ...
    • [BMIM][PF6] Promotes the synthesis of halohydrin esters from diols using potassium halides 

      Oromí Farrús, Mireia; Eras i Joli, Jordi; Villorbina Noguera, Gemma; Torres i Grifo, Mercè; Llopis-Mestre, Verónica; Welton, Tom; Canela i Garayoa, Ramon (Japan Society for Analytical Chemistry, 2008)
      Haloesterification of diverse diols with various carboxylic acids was achieved using potassium halides (KX) as the only halide source in ionic liquids. The best yield was obtained in [BMIM][PF6] when 1,2-octanediol, palmitic ...
    • Obtaining the three-dimensional structure of tree orchards from remote 2D terrestrial LIDAR scanning 

      Rosell Polo, Joan Ramon; Llorens Calveras, Jordi; Sanz Cortiella, Ricardo; Arnó Satorra, Jaume; Ribes Dasi, Manuel; Masip Vilalta, Joan; Escolà i Agustí, Alexandre; Camp, Ferran; Solanelles Batlle, Francesc; Gràcia, Felip; Gil Moya, Emilio; Val, Luis; Planas de Martí, Santiago; Palacín Roca, Jordi (Elsevier, 2009)
      In recent years, LIDAR (light detection and ranging) sensors have been widely used to measure environmental parameters such as the structural characteristics of trees, crops and forests. Knowledge of the structural ...
    • A tractor-mounted scanning LIDAR for the non-destructive measurement of vegetative volume and surface area of tree-row plantations: a comparison with conventional destructive measurements 

      Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Llorens Calveras, Jordi; Arnó Satorra, Jaume; Escolà i Agustí, Alexandre; Ribes Dasi, Manuel; Masip Vilalta, Joan; Camp, Ferran; Gràcia, Felip; Solanelles Batlle, Francesc; Pallejà Cabrè, Tomàs; Val, Luis; Planas de Martí, Santiago; Gil Moya, Emilio; Palacín Roca, Jordi (Elsevier, 2009)
      The use of a low-cost tractor-mounted scanning Light Detection and Ranging (LIDAR) system for capable of making non-destructive recordings of tree-row structure in orchards and vineyards is described. Field tests consisted ...
    • Design of a decision support method to determine volume rate for vineyard spraying 

      Gil Moya, Emilio; Escolà i Agustí, Alexandre (American Society of Agricultural and Biological Engineers, 2009)
      Dose determination in crops such as grapevine, which develops a large canopy within a relatively short period of time, becomes a key factor on the final success of plant protection product (PPP) application. Efficacy of ...
    • Applying precision feeding techniques in growing-finishing pig operations 

      Pomar, Càndido; Hauschild, Luciano; Zhang, Guo-Hua; Pomar Gomà, Jesús; Lovatto, Paolo Alberto (Sociedade Brasileira de Zootecnia, 2009)
      The high cost of feed ingredients, the use of non-renewable sources of phosphate and the dramatic increase in the environmental load resulting from the excessive land application of manure are major challenges for the ...
    • 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 ...
    • 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. ...
    • Combining AlCl3·6H2O and an ionic liquid to prepare chlorohydrin esters from glycerol 

      Villorbina Noguera, Gemma; Tomàs, Albert; Escribà i Gelonch, Marc; Oromí Farrús, Mireia; Eras i Joli, Jordi; Balcells Fluvià, Mercè; Canela i Garayoa, Ramon (Elsevier, 2009)
      We describe here the first example in which glycerol has been transformed into chlorohydrin esters using an ionic liquid and hydrated aluminium chloride. The method avoids using Crown-18 ether, which was needed to obtain ...
    • Specific anti-Neospora caninum IgG1 and IgG2 antibody responses during gestation in naturally infected cattle and their relationship with gamma interferon production 

      Almería, S.; Nogareda, Carmina; Santolaria Blasco, Pilar; García Ispierto, Irina; Yániz Pérez de Albéniz, Jesús; López Gatius, Fernando (Elsevier, 2009)
      Gamma interferon (IFN-g) production has been attributed a protective role against abortion in Neospora-infected dairy cows. This study investigate possible relationships between plasma levels of the N. caninum-specific ...
    • Three-dimensional antennal lobe atlas of the oriental fruitmoth, Cydia molesta (Busck) (Lepidoptera: Tortricidae): comparison of male and female glomerular organization 

      Varela, Nelia; Couton, Louise; Gemeno Marín, César; Avilla Hernández, Jesús; Rospars, Jean-Pierre; Anton, Sylvia (Springer-Verlag, 2009)
      The oriental fruit moth Cydia molesta is an important pest and the behavioural role of olfactory signals such as pheromones and plant volatiles have been studied extensively in both sexes. To understand odour processing ...