TAXONOMY, ONTOGENY and PALEOECOLOGY of TWO SPECIES of HARBINIA TSAO, 1959 (CRUSTACEA, OSTRACODA) FROM THE SANTANA FORMATION, LOWER CRETACEOUS, NORTHEASTERN BRAZIL

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

BLOOD-CONSTITUENTS AND ELECTROPHORETIC PATTERNS IN ANTARCTIC BIRDS - PENGUINS AND SKUAS

1. A survey has been carried out on the blood constituents of penguins from the Pygoscellidae family, Pygoscellis antartica, P. papua and P. adeliae, and of skuas (Chataracta maccormicki).2. Glucose, non-protein nitrogen compounds, proteins, lipids and inorganic compounds and the electrophoretic patterns for hemoglobin, serum proteins and lipoproteins were studied.3. The values obtained for glucose partition in the blood, glycosylated hemoglobin and non-protein nitrogen compounds, are discussed.

Estudio económico de América Latina 1959: versión preliminar = Economic survey of Latin America 1959: preliminary version

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Tasas de inmigración femenina por grupos de edad para la ciudad de Santiago, 1910-1959

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La mortalidad en la República Argentina según tablas de vida de 1914, 1946-48 y 1959-61

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La mortalidad de la República Argentina según tablas de vida de 1914, 1946-48 y 1959-61

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Guatemala: las diferencias socioeconómicas de la fecundidad, 1959-1980

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Republica Argentina: evaluacion y ajuste del censo de poblacion de 1960 por sexo y edad y tabla abreviada de mortalidad, 1959-1961

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Tabla abreviada de mortalidad, Republica de Mexico 1959-1961

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Republica Argentina: evaluacion y ajuste del censo de poblacion de 1960 por sexo y edad y tabla abreviada de mortalidad, 1959-1961

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Tablas completas de mortalidad para la República Argentina, 1959-1961

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Evaluación y ajuste del censo de población de 1960 por sexo y edad y tabla abreviada de mortalidad 1959-1961

Versión completa publicada por el Centro Latinoamericano de Demografía: E/CN.CELADE/C.32, Santiago, Chile 1964

Tendencias económicas de América Latina en 1959 = Economic trends in Latin America in 1959

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CO2-C losses and carbon quality of selected Maritime Antarctic soils

Polar Regions are the most important soil carbon reservoirs on Earth. Monitoring soil carbon storage in a changing global climate context may indicate possible effects of climate change on terrestrial environments. In this regard, we need to understand the dynamics of soil organic matter in relation to its chemical characteristics. We evaluated the influence of chemical characteristics of humic substances on the process of soil organic matter mineralization in selected Maritime Antarctic soils. A laboratory assay was carried out with soils from five locations from King George Island. We determined the contents of total organic carbon, oxidizable carbon fractions of soil organic matter, and humic substances. Two in situ field experiments were carried out during two summers, in order to evaluate the CO2-C emissions in relation to soil temperature variations. The overall low amounts of soil organic matter in Maritime Antarctic soils have a low humification degree and reduced microbial activity. CO2-C emissions showed significant exponential relationship with temperature, suggesting a sharp increase in CO2-C emissions with a warming scenario, and Q10 values (the percentage increase in emission for a 10°C increase in soil temperature) were higher than values reported from elsewhere. The sensitivity of the CO2-C emission in relation to temperature was significantly correlated with the humification degree of soil organic matter and microbial activity for Antarctic soils. © 2012 Antarctic Science Ltd.