Diário da Constituinte [gravação de vídeo] : [programa n. 570]

Concessão de entrevista pelo Presidente Ulysses Guimarães sobre a duração do mandato do Presidente da República, José Sarney. Emendas apresentadas sobre o tempo de duração do mandato do Presidente da República: 5 anos, 4 anos (Constituinte Fernando Henrique Cardoso) e 4 anos e meio (Constituintes Heráclito Fortes e Saulo Queiroz). Defesa da possibilidade de coincidir as eleições presidenciais com as eleições municipais. No tocante ao capítulo Comunicação Social, foram discutidas a criação do Conselho Nacional de Comunicação; de marco regulatório sobre a concessão e renovação de canais de rádio e televisão. Defesa por representantes de artistas e de jornalistas da regionalização da produção cultural como mecanismo de combate à formação de oligopólios na comunicação em massa.

Meeting of minds : islamic encounters c. 570 to 1750.

Ayuda a los alumnos a entender la mentalidad de las personas que integraban el mundo islámico y de aquellas otras con las que se encontraron en su expansión. Para ello, se estudian las condiciones sociales, políticas, religiosas y culturales del mundo preislámico e islámico hasta 1750. Cada sección se estructura como una investigación histórica, para que cada estudiante seleccione, ordene y clasifique la información y aprenda a relacionar las cuestiones clave. Su contenido se adapta al curriculum nacional inglés.

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 570 - Weiterleitung von Georg Carl Friedrich Kunowski eines Schreibens vom Berliner Kammergericht

2 Blatt

Ms.Ff.F.Stoltze 3. 570 - Brief von Friedrich Stoltze an Friedrich Stoltze und Marie Stoltze

Neujahrs-Glückwünsche

Na 1 Nachlass Max Horkheimer, 570 - Korrespondenzen u.a. mit Margot von Mendelssohn (p. VI 29, 179-317)

208 Briefe zwischen Margot von Mendelssohn und Max Horkheimer; 1 Brief von Max Horkheimer an H. L. Byram, 01.05.1954; 1 Brief an Margot von Mendelssohn von Edgar E. Walden, 16.04.1954; 1 Brief von Robert S. Butts an Margot von Mendelssohn, [1954];

Methane hydrate at DSDP Site 84-570

Deep Sea Drilling Project (DSDP) studies at Site 570 on the landward slope of the Middle America Trench off Guatemala allow for the first time a quantitative estimate of the methane hydrate content in the massive mudstones deposited there. Drilling across the Guatemalan transect on DSDP Legs 67 and 84 has resulted in the greatest number of visual observations of gas hydrate in any marine area. At Site 570, a 1.5-m-long section of massive methane hydrate was unexpectedly cored in an area where none of the usual signs of gas hydrate in seismic records were present. The sediment section is similar to that recovered at the other eight sites off Guatemala, but drilling at Site 570 may have penetrated through a fault zone that provided the space for accumulation of massive gas hydrate. The methane hydrate was analyzed using the following well logs: density, sonic, resistivity, gamma-ray, caliper, neutron porosity, and temperature. The density, sonic, and resistivity logs define a 15-m-thick hydrated zone within which a 4-m-thick nearly pure hydrate section is contained. The methane gas content ranges from 240 m**3 to 1400 m**3 per m**2 of lateral extent; and if the body extends a square kilometer, its total volume of stored gas could be from 240*10**6m**3 to 1400*10**6m**3. Because the acoustic impedance of hydrate calculated from the sonic and density logs shows no anomalous values, the shape and extent of the hydrate body cannot be defined in seismic records. Thus the body is theoretically nonreflective in contrast to the base of the hydrate reflection. The base of the gas hydrate reflection is presumed to be the result of the velocity contrast between sediment containing gas hydrate and sediment containing free gas.

Geochemistry of gas hydrates of DSDP Hole 84-570

During Deep Sea Drilling Project (DSDP) Leg 84 a core 1 m long and 6 cm in diameter of massive gas hydrate was unexpectedly recovered at Site 570 in upper slope sediment of the Middle America Trench offshore of Guatemala. This core contained only 5-7% sediment, the remainder being the solid hydrate composed of gas and water. Samples of the gas hydrate were decomposed under controlled conditions in a closed container maintained at 4°C. Gas pressure increased and asymptotically approached the equilibrium decomposition pressure for an ideal methane hydrate, CH4.5-3/4H2O, of 3930 kPa and approached to this pressure after each time gas was released, until the gas hydrate was completely decomposed. The gas evolved during hydrate decomposition was 99.4% methane, ~0.2% ethane, and ~0.4% CO2. Hydrocarbons from propane to heptane were also present, but in concentrations of less than 100 p.p.m. The carbon-isotopic composition of methane was -41 to -44 per mil, relative to PDB standard. The observed volumetric methane/water ratio was 64 or 67, which indicates that before it was stored and analyzed, the gas hydrate probably had lost methane. The sample material used in the experiments was likely a mixture of methane hydrate and water ice. Formation of this massive gas hydrate probably involved the following processes: (i) upward migration of gas and its accumulation in a zone where conditions favored the growth of gas hydrates, (ii) continued, unusually rapid biological generation of methane, and (iii) release of gas from water solution as pressure decreased due to sea level lowering and tectonic uplift.