Contents of major components, U, and Th in bones and bone debris

Uranium and thorium contents, as well as their distribution patterns have been studied in biogenic phosphates from the Atlantic and Pacific Oceans. Differently lithified fish remains (bones, scales, teeth) and marine mammal bones (ribs, vertebras, earbones) collected from both reduced shelf sediments and oxidized pelagic ones have been analyzed. U content in the material varies from 0.7 to 700 ppm, and Th content - from <0.5 to 14 ppm. U/Th ratio varies from 0.16 to 400. Contents of both elements increase with lithification of biogenic phosphates. U concentration is more intense on shelves, whereas thorium concentration increases in pelagic areas. Partial positive correlation of U and Th with Fe and negative correlation of U with organic carbon are noted. The latter corresponds to higher lithification of biogenic phosphates. Calcium phosphate transformed from hydroxyapatite to fluorcarbonate-apatite is the main carrier of U, while transformed organic matter is a minor agent. Thorium is mainly bound with Fe.

Composition of marine phosphorites and phosphate-bearing sediments

The book deals with behavior of phosphorus and its concentration in oceanic phosphorites. The major stages of marine geochemical cycle of phosphorus including its supply to sedimentary basins, precipitation from sea water, distribution and speciation in bottom sediments, diagenetic redistribution, and relation to other elements are under consideration. Formation of recent phosphorites as a culmination of phosphate accumulation in marine and oceanic sediments is examined. Distribution, structure, mineral and chemical compositions of major phosphorite deposits of various age on continental margins, as well as on submarine plateaus, uplifts and seamounts and some islands are described. A summary of trace element abundances in oceanic phosphorites is presented. Problems of phosphorite origin are discussed.

Carbon isotope composition of lipids from bones and host sediments of the Atlantic and Pacific Oceans

Carbon in lipids separated from organic matter of fish and marine mammal bones from bottom of the Pacific and Atlantic oceans has d13C values ranging from -21.6 to -25.8 per mil and is isotopically lighter than that in lipids and total organic matter of host sediments. During fossilization of organic phosphate carbon isotope composition of bound lipids of fish bone becomes lighter and that of bones of mammals becomes heavier, possibly as a result of metabolisms of these organisms and composition of phospholipids in them.

Carbon onions: Carriers of the 217.5 nm interstellar absorption feature

The UV-VIS characteristics of carbon ions fabricated by an arch discharge in water or liquid nitrogen show characteristics that are similar to the interstellar absorption feature. Thus, high purity and well separated carbon onion samples prepared by annealing the as-fabricated powder in air at 600°C for 60 showed a constant absorption peak at 4.6 μm-1 with a variable width ranging from 1.2-1.6 μm-1. In addition to the UV-VIS data, the origin of the absorption feature at 4.6 μm-1 in carbon onions can be attributed to the collective excitations of π plasmons.

Sapientia, 2005, Vol. LX, nº 217 (número completo)

Contenido: El tratamiento de la providencia general de Dios en Santo Tomás de Aquino / Gabriel Delgado – Sobre el ente posible y necesario en Tomás de Aquino / Alberto Berro – El apogeo del nominalismo escolástico y la imposibilidad de la metafísica / Mario Enrique Sacchi – La psicologia de Nietzsche e il suo influsso nella Psicoanalisi / Martín F. Echavarría – Ernst Cassirer: de la tragedia a la ambivalencia de la cultura (parte II) / Amán Rosales Rodríguez – Conocimiento y respuesta al valor. Enfoque fenomenológico axiológico de von Hildebrand / Elizabeth Da Dalt de Mangione -- Heidegger, Aristóteles y la Escolástica / Silvana Filippi – Los “juicios directos” y la probabilidad. Introducción al concepto de probabilidad según John Maynard Keynes / Marcelo Luis Imperiale – Generalis Relativitatis Theoria: geometria et philosophia / Ramiro Délio Borges de Meneses – El arte de gobernar. Nota sobre Michel Foucault a 20 años de su muerte -- Bibliografía

Diário da Constituinte [gravação de vídeo] : [programa n. 217]

O substitutivo do Relator Bernardo Cabral estabelece a proibição da propaganda de medicamentos, tabaco, bebidas alcoólicas e agrotóxicos. Cidadãos opinam sobre o tema. A Associação Brasileira de Propaganda lembra que o Brasil é hoje o segundo exportador de fumo no mundo. Seu presidente afirma que a propaganda desses setores representa 20% do faturamento dos meios de comunicação e que a proibição gerará grande desemprego. O Deputado Thelmo Kirtz (PDS-RS) esclarece que só no Paraná, Santa Catarina e Rio Grande do Sul setecentas e quarenta mil pessoas trabalham nas lavouras de fumo. O Deputado Fausto Rocha (PFL-SP) observa que o cigarro traz malefícios muito sérios para o fumante, inclusive vários tipos de câncer. A Comissão de Sistematização da Assembleia Nacional Constituinte (ANC) começa a debater o substitutivo da Constituição. Na primeira reunião, constituintes criticaram a ausência do Relator Bernardo Cabral e a elaboração de um novo substitutivo que está sendo feito no Instituto Israel Pinheiro, fora do Congresso Nacional. O Deputado José Genoíno (PT-SP) considera que o trabalho da Assembleia Nacional Constituinte tem que ser feito dentro do Congresso Nacional. O Líder do Governo, Deputado Carlos Santana diz que esse trabalho tem que vir para a Comissão de Sistematização. No Instituto Israel Pinheiro, distante 25 kilômetros do Congresso Nacional, o Relator Bernardo Cabral estuda as emendas recebidas sobre o sistema de governo que, segundo ele, é o problema mais difícil de ser contornado.

Cultivar de soja BRS 217 - Flora.

2001