Sediment properties of IODP Holes 303-U1302A and 303-U1305C

Episodes of ice-sheet disintegration and meltwater release over glacial-interglacial cycles are recorded by discrete layers of detrital sediment in the Labrador Sea. The most prominent layers reflect the release of iceberg armadas associated with cold Heinrich events, but the detrital sediment carried by glacial outburst floods from the melting Laurentide Ice Sheet is also preserved. Here we report an extensive layer of red detrital material in the Labrador Sea that was deposited during the early last interglacial period. We trace the layer through sediment cores collected along the Labrador and Greenland margins of the Labrador Sea. Biomarker data, Ca/Sr ratios and d18O measurements link the carbonate contained in the red layer to the Palaeozoic bedrock of the Hudson Bay. We conclude that the debris was carried to the Labrador Sea during a glacial outburst flood through the Hudson Strait, analogous to the final Lake Agassiz outburst flood about 8,400 years ago, probably around the time of a last interglacial cold event in the North Atlantic. We suggest that outburst floods associated with the final collapse of the Laurentide Ice Sheet may have been pervasive features during the early stages of Late Quaternary interglacial periods.

Plan zemelʻnogo otvoda kolfonda "Novai︠a︡ Zhiznʻ" Krivorogskogo okruga Mikhaĭlovskogo raĭona ploshchadi︠u︡ 303 desi︠a︡tin

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Plan zemelʻnogo otvoda kolfonda "Novai︠a︡ Zhiznʻ" Krivorogskogo okruga, Mikhaĭlovskogo raĭona ploshchadiʻ︠u︡ 303 desi︠a︡tin

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Diário da Constituinte [gravação de vídeo] : [programa n. 303]

Tem início a votação do Título 5, sobre a Defesa do Estado e as Instituições Democráticas. Foram aprovados os últimos destaques do Título 4, que trata da organização dos poderes e sistemas de governo. Aprovado destaque dos Deputados Brandão Monteiro (PDT-RJ), Paulo Delgado (PT-MG) e Enoc Vieira (PFL-MA), que estabelece um sistema de votação proporcional para a Camara dos Deputados. O Deputado Brandão Monteiro (PDT-RJ) considera que não se deve computar votos em branco e nulos para a legenda, por comprometer a sistemática da proporcionalidade. Aprovado o destaque que mantém o número de deputados que a Câmara deve possuir, de no máximo 60 parlamentares por estado. O Deputado Roberto Cardoso Alves (PMDB-SP) declara que a Federação Brasileira e a Constituinte saem prejudicados com a decisão. O Deputado José Costa (PMDB-AL) relata que o fundamental é manter o equilíbrio federativo. Aprovado o destaque do Senador Nelson Carneiro (PMDB-RJ) que altera as atribuições do Conselho da República. Rejeitada a emenda do Deputado Vilson Souza (PMDB-PR), o qual previa que o estado de emergência fosse precedido de uma autorização do Congresso. O Deputado Nelson Jobim (PMDB-RS) discorda, pois considera que a intervenção deve ser imediata. Aprovada a emenda do Deputado José Genoíno (PT-SP), que retira do texto a expressão de atos ilícitos, por causar discussões entre o que é lícito e ilícito.

Viscosity of binary mixtures of cycloalkane with cycloalkane, alkane and aromatic hydrocarbon at 303.15 K

The viscosity ? for eighteen binary mixtures cyclopentane + cyclohexane and + cyclooctane; cyclohexane + cycloheptane, + cyclooctane, + methylcyclohexane, + n-hexane, + n-heptane, + n-octane, + i-octane, + benzene, + toluene, + ethylbenzene, + p-xylene, and + propylbenzene; methylcyclohexane + n-hexane, + i-octane, and + benzene; and cyclooctane + benzene have been reported at 303.15 K over the entire range of composition. The viscosity deviations ?? and excess Gibbs energy of activation ?G*E of viscous flow based on Eyring's theory have been calculated. The effects of molecular sizes and shapes of the component molecules and of interaction energy in the mixture have been discussed. The viscosity data have been correlated with the equations of Grunberg and Nissan, Hind, McLaughlin and Ubbelohde, Tamura and Kurata, Katti and Chaudhri, McAllister, Heric and Brewer, and of Auslaender.

Speeds of sound and isentropic compressibilities of binary mixtures containing trialkylamines with alkanes and mono-alkylamines at 303.15 and 313.15 K

Isentropic compressibilities ?S, and excess isentropic compressibilities ?SE have been determined from measurements of speeds of sound u and densities ? of 14 binary mixtures of triethylamine (TEA) and tri-n-butylamine (TBA) with n-hexane, n-octane, iso-octane, n-propylamine, n-butylamine, n-hexylamine and n-octylamine. The relative magnitude and sign of ?SE have been interpreted in terms of molecular interactions and interstitial accommodation. The values of ?SE for TEA + alkane are positive while for TBA + alkane are negative. The values of ?SE for TEA + primary amine become progressively less positive and eventually to negative with the increase in chain length of alkylamine. In case of TBA + primary amine, the values of ?SE increase from n-propylamine to n-butylamine, and then decrease with chain length of primary amine. The experimental speeds of sound u have been analyzed in terms of collision factor theory, free length theory and Prigogine–Flory–Patterson statistical theory of solutions.