Major and trace elements and minerals at DSDP Hole 79-544A

Fifty m of basement rocks underlying 185 m of Neogene and Mesozoic sediments were drilled seaward of the Mazagan Slope about 100 km west of Casablanca during Leg 79. These rocks are metagranites with mylonitic textures consisting dominantly of quartz, plagioclase, and potassium feldspar. Chemically, they are strongly peraluminous. This along with the absence of hornblende suggest that these rocks are similar to the S-type granites. Petrographic and chemical data suggest the possible existence of a former weathering surface on top of the Mazagan metagranite.

Composition of aerosols collected in the Western Russian Arctic in August-September 1991

In August-September 1991 during the SPASIBA expedition (Scientific Program on the Arctic and Siberian Aquatorium) aboard R/V Yakov Smirnitzky in the Laptev Sea ten samples of aerosols were collected by nylon nets. A combined approach including various analytical techniques, such as single-particle analysis, instrumental neutron activation analysis, and atomic absorption spectrophotometry, was used to study composition of the samples. Mass concentration of coarse-grained (>0.001 mm) insoluble fraction of aerosols ranged from 80 to 460 ng/m**3. In all the samples remains of land vegetation were found to be the dominant component. Organic carbon content of the aerosols ranged from 23 to 49%. Inorganic part of the samples was represented mainly by alumosilicates and quartz. Anthropogenic ''fly ash'' particles were observed in all the samples. Temporal variations of element concentrations resulted from differences in air masses entering the studied area.

Interfaces entre as políticas educacionais e os marcadores sociais : Quem sao os alunos que fracassam num contexto em todos têm direito a educaçao?

A implantaçao da obrigatoriedade do acesso à escola pública de Ensino Fundamental no Brasil, a partir do final dos aos 1980, produziu uma nova realidade no sistema de ensino. Por um lado, a taxa de frequência da escola básica passou de 75,03 (1990) para 92,14 (2010). Em contrapartida, a taxa de analfabetismo de pessoas com mais de 18 anos ainda é de 10,19 e somente 54,92 das pessoas com 18 anos ou mais tem Ensino Fundamental completo. Um conjunto de contradiçoes produzidas e reproduzidas sob o enfoque da justiça escolar a qual, norteia à universalizaçao do acesso a escola básica. Neste sentido, a ideia central desse trabalho foi reconhecer o perfil socioeducacional dos alunos em situaçao de fracasso escolar (repetência, distorçao idade-série e evasao escolar) no estado brasileiro que apresenta o melhor índice desenvolvimento da escola básica. Para tanto, foram analisadas as respostas de 87.607 questionários respondidos por alunos do 9o ano, participantes da Prova Brasil 2011. Com auxílio do software SPSS, foram produzidos procedimentos estatísticos para sistematizar e ampliar a análise que teve com suporte teórico as reflexoes preconizadas por distintos autores da Sociologia da Educaçao

Controle do treinamento desportivo no contexto sulamericano

Pesquisa "Metodologia do Treinamento Desportivo", objetivo identificar características da metodologia do treinamento desportivo em Sulamerica, especificamente conhecer, analisar e determinar diferentes modelos de controle utilizados, sua aplicaçao em diferentes provas de controle aos esportistas, pelos treinadores nos Jogos Suramericanos, Medellín 2010; estudo quantitativo - descritivo, mostra intencional, nao se tive dado exato dos treinadores assistentes, técnica utilizada: questionário e, para análise da informaçao programa Windows 2007; forem encostados 93 treinadores (86 homes, 7 mulheres) com idade meia de 46,1 anos (±10,2) com um mínimo de 24, máxima de 79. A experiência proêmio como treinadores de 20,5 (±9,8) anos, entre 16,3 e 27,2 anos, provenientes de 13 países, 28 esportes, achando que o 90,3dos treinadores aplicam diferentes provas de controle, 79 treinadores de campo, 45 de laboratório e 41 ambas as provas. Apresenta-se tendência de que os esportistas treinados por instrutores de países que aplicavam mais provam de controle (terreno e laboratório) obtiveram maior resultados. Implicaçoes relevantes têm que alguns treinadores nao fazem seguimentos respectivos e adequados depois dos controles, já seja, desconhecimento, caraterísticas de convocatória dos esportistas, tipo de contrataçao laboral; uso de provas de campo e laboratório, apoio de equipe multidisciplinar, condiçoes tecnológicas e equipamentos e, infraestrutura que influi nos processos e logros

Chemical and Sr isotopic compositions of 3 step leachates and residues of bulk samples, zeolites, and smectites from Lower Miocene sediments at ODP Site 166-1007

Massive clinoptilolite authigenesis was observed at about 1105 meters below sea floor (mbsf) in lower Miocene wellcompacted carbonate periplatform sediments from the Great Bahama Bank [Ocean Drilling Program, ODP Leg 166, Site 1007]. The diagenetic assemblage comprises abundant zeolite crystallized within foraminifer tests and sedimentary matrix, as well as Mg smectites. In carbonate-rich deposits, the formation of the zeolite requires a supply of silica. Thus, the objective of the study is to determine the origin of the silica supply, its diagenetic evolution, and consequently the related implications on interpretation of the sedimentary record, in terms of local or global paleoceanographic change. For lack of evidence for any volcaniclastic input or traces of Si-enriched deep fluids circulation, an in situ biogenic source of silica is validated by isotopic data and chemical modeling for the formation of such secondary minerals in shallow-water carbonate sequences. Geochemical and strontium isotopic data clearly establish the marine signature of the diagenetic zeolite, as well as its contemporaneous formation with the carbonate deposition (Sr model ages of 19.6-23.2 Ma). The test of saturation for the pore fluids specifies the equilibrium state of the present mineralogical assemblage. Seawater-rock modeling specifies that clinoptilolite precipitates from the dissolution of biogenic silica, which reacts with clay minerals. The amount of silica (opal-A) involved in the reaction has to be significant enough, at least 10 wt.%, to account for the observed content of clinoptilolite occurring at the most zeolite-rich level. Modeling also shows that the observed amount of clinoptilolite (~19%) reflects an in situ and short-term reaction due to the high reactivity of primary biogenic silica (opal-A) until its complete depletion. The episodic occurrence of these well-lithified zeolite-rich levels is consistent with the occurrence of seismic reflectors, particularly the P2 seismic sequence boundary located at 1115 mbsf depth and dated as 23.2 Ma. The age range of most zeolitic sedimentary levels (biostratigraphic ages of 21.5-22 Ma) correlates well with that of the early Miocene glaciation Mi-1 and Mi-1a global events. Thus, the clinoptilolite occurrence in the shallow carbonate platform environment far from volcanogenic supply, or in other sensitive marine areas, is potentially a significant new proxy for paleoproductivity and oceanic global events, such as the Miocene events, which are usually recognized in deep-sea pelagic sediments and high latitude deposits.

Andrea Suárez Córica, Atravesando la noche. 79 sueños y testimonio acerca del genocidio. La Plata, Editorial De la Campana, 1996

Fil: Merbilhaá, Margarita. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Andrea Suárez Córica, Atravesando la noche. 79 sueños y testimonio acerca del genocidio. La Plata, Editorial De la Campana, 1996

Fil: Merbilhaá, Margarita. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.