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Mostrando ítems 61-80 de 1027
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Análisis integrado del consumo de bienes ecológicos y económicos en ecosistemas agrícolas pampeanos : el uso de la emergía como indicador sistémico de sustentabilidad
(Facultad de Agronomía, Universidad de Buenos Aires, 2013)Los ecosistemas agrícolas de la Región Pampeana Argentina (RPA) atravesaron en las últimas décadas cambios asociados a procesos de expansión geográfica e intensificación productiva. En este trabajo se estudió el funcionamiento ... -
Influencia de la temperatura en llenado de grano como factor determinante de la presencia de granos verdes en soja
(Facultad de Agronomía, Universidad de Buenos Aires, 2013)Una de las características que define la calidad de los granos de soja es la presencia de granos verdes (GV). Estos exhiben una coloración verdosa, total o parcial, debida a la presencia de pigmentos clorofílicos no ... -
A new species of Ornithodoros (Acari: Argasidae), parasite of Microlophus spp. (Reptilia: Tropiduridae) from northern Chile
(2013-02)A new species, Ornithodoros microlophi (Acari: Argasidae), belonging to the subgenus Alectorobius is described from larvae collected on the lizards Microlophus atacamensis (Donoso-Barros, 1966) and Microlophus quadrivittatus ... -
Yield components, light interception and radiation use efficiency of lucerne (Medicago sativa L.) in response to row spacing
(2013-02)Lucerne sowing is characterized by a rectangular spatial arrangement, i.e. greater distance between sowing rows than between plants in the row. Therefore, the reduction of row spacing generates more square spatial arrangements ... -
Ticks (Acari: Argasidae, Ixodidae) from Middle and pre-Hispanic Late Holocene associated with human activities in northwestern Argentina
(2013-02)One male of Amblyomma parvitarsum and one male and a female of Ornithodoros sp. were recovered from archaeological layers of the Middle Holocene in a rock shelter in the province of Catamarca, used by hunter-gatherer groups. ... -
Immune response of heifers against a Staphylococcus aureus CP5 whole cell vaccine formulated with ISCOMATRIX™ adjuvant
(2013-02)The shortcomings of Staphylococcus aureus vaccines to control bovine mastitis have been attributed to insufficient capacity of the vaccines to induce opsonizing antibodies and to stimulate cellular immune responses. Types ... -
Inseminación artificial a tiempo fijo en vacas para carne : efecto del sitio de deposición del semen y del número de espermatozoides sobre el desempeño reproductivo
(Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, 2013-04)El objetivo principal de este trabajo fue determinar el efecto del lugar de deposición del semen combinado con una dosis reducida de espermatozoides (DRE) y el número de veces que se realiza la inseminación artificial a ... -
Quantitative risk assessment of human campylobacteriosis by consumption of salad cross-contaminated with thermophilic Campylobacter spp. from broiler meat in Argentina
(2013-04-01)Here, we developed a quantitative risk assessment for thermophilic Campylobacter spp. related to the consumption of salad prepared alongside broiler meat. The assessment considered initial contamination levels, cross-contamination ... -
Study of the effects of spray‐drying on the functionality of probiotic lactobacilli
(2013-05)Three probiotic lactobacilli strains were spray‐dried in 20% (w/v) skim milk and submitted to a simulated gastrointestinal digestion. Fresh or spray‐dried cultures were administered to mice for 5 and 10 days, and Immunoglobulin ... -
Collection and morphological characterization of Panicum coloratum L. in Argentina
(2013-06)Panicum coloratum (Poaceae) is a perennial grass native to South Africa, distributed all over the world, but poorly adopted by ranchers in Argentina. Adapted to a wide range of soil and climatic conditions, it constitutes ... -
Intramammary infusion of Panax ginseng extract in the bovine mammary gland at cessation of milking modifies components of the insulin-like growth factor system during involution
(2013-06)The objective of this study was to evaluate the effects of a single intramammary infusion of Panax ginseng extract (GS) on insulin-like growth factors (IGF) in bovine mammary gland during early involution. Eight mammary ... -
Distribution and genetic variation of Amblyomma triste (Acari: Ixodidae) in Argentina
(2013-09)A study was conducted to investigate the distribution of Amblyomma triste in Argentina under the hypothesis that this tick prevails in riparian localities along the Paraná River and adjacent humid environments from 34°30′ ... -
Ornithodoros peropteryx (Acari: Argasidae) in Bolivia: an argasid tick with a single nymphal stage
(2013-10)By the end of the 1960s, the argasid tick Ornithodoros peropteryx was described from larval specimens collected from the bat Peropteryx macrotis in Colombia. Since its original description, no additional record of O. ... -
Plant stand, nodulation and seed yield in soybean as affected by phosphate fertilizer placement, source and application method
(2013-11)Establishing an optimum plant population at planting is the start-point for assuring seed yield in crops. In addition to plant establishment, the onset of a fully functional nodule system is crucial for nitrogen nutrition ... -
Comparative transcriptome analysis of geographically distinct virulent and attenuated Babesia bovis strains reveals similar gene expression changes through attenuation
(2013-11)Background: Loss of virulence is a phenotypic adaptation commonly seen in prokaryotic and eukaryotic pathogens. This mechanism is not well studied, especially in organisms with multiple host and life cycle stages such as ... -
Selection by seed weight improves traits related to seedling establishment in Panicum coloratum L. var. makarikariense
(Wiley, 2013-12)Selection for heavy seed was implemented to overcome establishment problems in Panicum coloratum var. makarikariense. A collection covering the genetic diversity of the species available in Argentina was used as a base ... -
La comunicación estratégica en el INTA lechero : investigación enactiva para el encuentro sociocultural
(Facultad de Ciencia Política y Relaciones Internacionales, Universidad Nacional de Rosario, 2013-12)Este trabajo es una experiencia de despliegue de la investigación enactiva en una situación concertada entre proyectos de investigación y desarrollo vinculados a una cadena agroalimentaria (la lechera) en un instituto de ... -
Effect of deforestation and introduction of exotic grasses as livestock forage on the population dynamics of the cattle tick Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in northern Argentina
(2013-12)The effect of deforestation and the introduction of exotic grasses on the population dynamics of Rhipicephalus (Boophilus) microplus in northern Argentina was analysed. Biological parameters that were measured included ... -
Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae), the Cayenne tick: phylogeography and evidence for allopatric speciation
(2013-12)Background: Amblyomma cajennense F. is one of the best known and studied ticks in the New World because of its very wide distribution, its economical importance as pest of domestic ungulates, and its association with a ... -
Cambios en la productividad de los tambos del sur de Santa Fe = Changes in dairy farm productivity in the southern Santa Fe
(Asociación Argentina de Producción Animal, 2013-12)Se verificaron y analizaron los cambios producidos en la productividad de los sistemas lecheros del sur de Santa Fe en las últimas tres décadas. Se propusieron y compararon los modelos que mejor explican la productividad ...