992 resultados para Rhodes, Eugene Manlove, 1869-1934


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On spine: Bibliographies of American statute law. Contents.-Bibliographies of the states and the United States.-Law library catalogues.-Selected miscellaneous catalogues.

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At head of title: University of Liverpool.

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Includes index.

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La campaña de Buenos Aires había recibido desde fines del siglo XVIII importantes corrientes migratorias interprovinciales que fueron progresivamente desplazadas por las provenientes de Europa. Si bien existen trabajos ;basados en los resultados generales, se ha abordado muy poco el ;estudio de la población a partir de las cédulas censales en sí mismas. Nos proponemos aquí observar la estructura de la población de la campaña bonaerense durante estos primeros tiempos de la inmigración masiva, aplicando una perspectiva comparada entre tres pueblos: San Antonio de Areco en la zona norte, Mercedes en el centro y San Vicente en el sur. Se prestará particular atención a la composición de la población, su origen, las actividades productivas y el proceso de urbanización. Se analizan igualmente las pautas de destino y localización geográfica de los extranjeros en los pueblos rurales, las ocupaciones preferidas y la eventual diversificación de actividades en función de las nacionalidades

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El presente trabajo se propone abordar una serie de parlamentos indígenas (considerados ámbitos de consenso) realizados en los espacios de Pampa y Patagonia a finales del siglo XIX. El objetivo del artículo es realizar un análisis socio-político sobre estos ámbitos de consenso para identificar cuáles son los actores que participan en ella, tratando de interpretar algunas características que hacen a la dinámica política y a las estrategias políticas que llevan adelante algunos grupos étnicos con sus respectivos líderes. Por otra parte, y desde un punto de vista metodológico, el trabajo se focaliza en realizar un análisis comparativo sobre los parlamentos indígenas que se llevan adelante, sincrónicamente, en un espacio y en otro para de esta forma evitar generalizaciones sobre el objeto de estudio

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Survival of vegetation on soil-capped mining wastes is often impaired during dry seasons due to the limited amount of water stored in the shallow soil capping. Growth and survival of Rhodes grass (Chloris gayana) during soil drying on various layered capping sequences constructed of combinations of topsoil, subsoil, seawater-neutralised residue sand and low grade bauxite was determined in a glasshouse. The aim was to describe the survival of Rhodes grass in terms of plant and soil water relationships. The soil water characteristic curve and soil texture analysis was a good predictor of plant survival. The combination of soil with a high water holding capacity and low soil water diffusivity (e.g. subsoil with high clay contents) with soil having a high water holding capacity and high diffusivity (e.g. residue sand) gave best survival during drying down (up to 88 days without water), whereas topsoil and low grade bauxite were unsuitable (plants died within 18-39 days). Clayey soil improved plant survival by triggering a water stress response during peak evaporative water demand once residue sand dried down and its diffusivity fell below a critical range. Thus, for revegetation in seasonally dry climates, soil capping should combine one soil with low diffusivity and one or more soils with high total water holding capacity and high diffusivity.

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A solution culture experiment was conducted to examine the effect of Cu toxicity on Rhodes grass (Chloris gayana Knuth.), a pasture species used in mine-site rehabilitation. The experiment used dilute, solution culture to achieve external nutrient concentrations, which were representative of the soil solution, and an ion exchange resin to maintain stable concentrations of Cu in solution. Copper toxicity was damaging to plant roots, with symptoms ranging from disruption of the root cuticle and reduced root hair proliferation, to severe deformation of root structure. A reduction in root growth was observed at an external Cu concentration of < 1 mu M, with damage evident from an external concentration of 0.2 mu M. Critical to the success of this experiment, in quantitatively examining the relationship between external Cu concentration and plant response, was the use of ion exchange resin to buffer the concentration of Cu in solution. After some initial difficulty with pH control, stable concentrations of Cu in solution were maintained for the major period of plant growth. The development of this technique will facilitate future investigations of the effect of heavy metals on plants.

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A solution culture experiment was conducted to examine the effect of Cu toxicity on Rhodes grass (Chloris gayana), a pasture species used in mine site rehabilitation. The experiment used dilute, solution culture to achieve external nutrient concentrations which were representative of the soil solution, and ion exchange resins to maintain stable concentrations of Cu in solution. Copper toxicity was damaged plant roots, with symptoms ranging from disruption of the root cuticle and reduced root hair proliferation, to severe deformation of root structure. A reduction in root growth was observed at an external Cu concentration of