Browsing by Title
Now showing items 22860-22879 of 23844
-
Ultra sensitive microfluidic immunosensor for determination of clenbuterol in bovine hair samples using electrodeposited gold nanoparticles and magnetic micro particles as bio-affinity platform
(Elsevier, 2013-03-15)In this article, we report the first integrated microfluidic immunosensor coupled to a screen-printed carbon electrode (SPCE) applied to determination of clenbuterol (CLB) in bovine hair samples. CLB is a member of the ... -
Ultraestructura de órganos de áfidos asociados a la transmisión de fitopatógenos
(Asociación Argentina de Microscopía (SAMIC), 2022-06-08)Los pulgones (o áfidos) están posicionados como una de las principales plagas de cultivos agrícolas debido a su alto potencial para ocasionar pérdidas económicas en los cultivos, su alta tasa reproductiva, y por ser el ... -
Ultrasonografía en dos protocolos de superovulación en donantes Braford del nordeste argentino
(2018)La reproducción de animales de mayor valor genético ha llevado a desarrollar distintas biotecnologías, como la transferencia de embriones. Los tratamientos de superovulación producen respuestas muy variables sobre todo en ... -
Ultrasonografía y composición corporal
(Estación Experimental Agropecuaria Balcarce, INTA, 2016-03)A principios de la década de los ’90 comenzó a difundirse en Argentina el empleo de la ultrasonografía para estimar características carniceras en el animal vivo, convirtiéndose en una herramienta de gran ayuda para ... -
Umbrales de defoliación en soja, ajustes para la región
(EEA Reconquista, 2017-12)La soja es el principal cultivo agrícola de Argentina. En la campaña 2016/17 se produjeron 53,6 millones de toneladas, en un área de aproximadamente 20 millones de hectáreas, con un rendimiento promedio de 2,8 t/ha. Las ... -
Una experiencia de desarrollo rural con productores hortícolas en el Alto Valle
(2017)En la provincia de Río Negro la horticultura puede diferenciarse fundamentalmente en dos modalidades: producción especializada y diversificada. La primera se caracteriza porque la llevan adelante empresas y productores ... -
¿Una fruticultura sin fruticultores?
(2015)Cambios en el paisaje cuando se cierran las tranqueras. El drama de la vinculación del agricultor con la tierra fue recogido en diversas oportunidades por el cine y la literatura. Uno de los ejemplos más conocidos es el ... -
Uncontrolled Citrus psorosis virus infection in Citrus sinensis transgenic plants expressing a viral 24K-derived hairpin that does not trigger RNA silencing
(2016)Citrus psorosis virus (CPsV) is the causal agent of psorosis disease of citrus. Pineapple sweet orange plants were transformed with a hairpin construct derived from the viral 24k gene (lines ihp24K). Contrary to expectations, ... -
Underestimating low and overestimating high parakeet damage: Linking crop losses and farmer perception
(Elsevier, 2026-04)The economic impact of crop damage caused by wildlife can be perceived as significant by producers. Consequently, producers adopt different management strategies, which can affect the populations of the species involved. ... -
Underground Neighbors: Shared Root-Associated Fungi Facilitating the Coexistence of Nothofagus obliqua and Pinus ponderosa
(Springer, 2025-02)Despite the environmental and economic advantages of mixed plantations over monospecific ones, their implementation remains limited due to a lack of comprehensive understanding. Soil microorganisms, particularly root-associated ... -
Understanding introduction history: Genetic structure and diversity of the edible ectomycorrhizal fungus, Suillus luteus, in Patagonia (Argentina)
(Taylor & Francis, 2021-06)Suillus luteus is a common ectomycorrhizal (EM) fungus associated with several Pinus species. It is distributed throughout the Northern Hemisphere and has been introduced into South America and New Zealand. We examined the ... -
Understanding key population drivers of the spotted wing Drosophila in cultivated and natural areas in the Andes
(Springer Nature, 2025-03)The spotted-wing drosophila (SWD), Drosophila suzukii (Matsumara) (Diptera: Drosophilidae), is a serious global pest. Understanding the drivers for its success is fundamental to develop sustainable management tools. Here ... -
Understanding member characteristics and cooperative price effects: the case of the Argentinean dairy sector
(2019-06-10)Since the 1990s, Argentinean dairy-processing cooperatives have lost considerable amounts of members and market share. We analyse their current role by investigating the characteristics of farmers who continue delivering ... -
Understanding the adoption of sustainable silvopastoral practices in Northern Argentina: What is the role of land tenure?
(Elsevier, 2020)The Argentinian Dry Chaco has suffered from very high deforestation rates in the last decades, and forest degradation remains an important issue. This study examines the adoption of sustainable silvopastoral practices by ... -
Understanding the differential performance in hygienic behavior against dead brood of drones and workers of Apis mellifera : a chemical approach
(Taylor and Francis, 2025)Hygienic behavior is a social health mechanism displayed by honey bee workers of Apis mellifera by which dead or diseased brood is removed from the hive. Such behavior is known to be induced by olfactory cues. The efficiency ... -
Understanding the distribution of cattle production systems in the South American Chaco
(Taylor and Francis, 2020-02-11)Impacts of cattle production vary among different production systems, but data on their distribution is scarce for most world regions. In this work, we combine datasets on cattle vaccination locations and land cover in a ... -
Understanding the intracellular-to-extracellular localization switch of polyhydroxybutyrate polymerase in pseudomonas backgrounds as a microevolutionary process
(Elsevier, 2018-11)After gene duplication, paralogous genes evolve independently, and consequently, the new proteins encoded by these duplicated genes are exposed to changes in their subcellular location. Although there are increasing evidence ... -
Understanding the relationship between Mycobacterium bovis spoligotypes from cattle in Latin American Countries
(Elsevier, 2013-02)Spoligotyping is the most frequently used method for genotyping isolates of Mycobacterium bovis worldwide. In the current work, we compared spoligotypes from 1684 M. bovis isolates from Argentina (816), Brazil (412), Chile ... -
Undetermined cause of mortality in horses in Argentina
(2016)The aim of this report is to describe the features and clinical findings in a series of equine mortalities occurred in a Thoroughbred and Quarter Mile horse breeding farm located in Canuelas, Buenos Aires Province, Argentina. ... -
Unforeseen plant phenotypic diversity in a dry and grazed world
(Springer Nature, 2024-08-22)Earth harbours an extraordinary plant phenotypic diversity1 that is at risk from ongoing global changes2,3. However, it remains unknown how increasing aridity and livestock grazing pressure—two major drivers of global ...