Listar Articles publicats (Agrotecnio Center) por fecha de publicación
Mostrando ítems 1-20 de 1330
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Assessment of Recycling Tunnel Sprayers in Mediterranean Vineyards and Apple Orchards
(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
(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
(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 ... -
Real-time tree-foliage surface estimation using a ground laser scanner
(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 ... -
Glycerol as a starting material to prepare palmitate derivatives
(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 ... -
Dynamics of anti-Neospora caninum antibodies during gestation in chronically infected dairy cows
(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 ... -
Climate factors affecting conception rate of high producing dairy cows in northeastern Spain
(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 ... -
Combining regio- and enantioselectivity of lipases for the preparation of (R)-4-chloro-2-butanol
(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 ... -
Variable rate application of plant protection products in vineyard using ultrasonic sensors
(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 ... -
[BMIM][PF6] Promotes the synthesis of halohydrin esters from diols using potassium halides
(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 ... -
Edible coatings with antibrowning agents to maintain sensory quality and antioxidant properties of fresh-cut pears
(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, ... -
Review. Precision viticulture. Research topics, challenges and opportunities in site-specific vineyard management
(Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2009)Precision Viticulture (PV) is a concept that is beginning to have an impact on the wine-growing sector. Its practical implementation is dependant on various technological developments: crop sensors and yield monitors, local ... -
Deposición transversal de líquido de las boquillas de doble abanico TTJ60-11004 y TTJ60-11002 en distintas condiciones operacionales
(Sociedade Brasileira da Ciência das Plantas Daninhas, 2009)El objetivo de este trabajo fue el de evaluar la deposición transversal de caldo de las boquillas pulverizadoras de doble abanico TTJ60-11004 y TTJ60-11002 en distintas condiciones operacionales. Se utilizaron 5 muestras ... -
Applying precision feeding techniques in growing-finishing pig operations
(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 ... -
Three-dimensional antennal lobe atlas of the oriental fruitmoth, Cydia molesta (Busck) (Lepidoptera: Tortricidae): comparison of male and female glomerular organization
(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 ... -
Specific anti-Neospora caninum IgG1 and IgG2 antibody responses during gestation in naturally infected cattle and their relationship with gamma interferon production
(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 ... -
Combining AlCl3·6H2O and an ionic liquid to prepare chlorohydrin esters from glycerol
(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 ... -
A tandem Finkelstein-rearrangement–elimination reaction: a straightforward synthetic route to allyl esters
(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
(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. ... -
Design of a decision support method to determine volume rate for vineyard spraying
(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 ...