Jurassic sedimentation history at DSDP Hole 76-534A

Site 534 reflects a complex interplay of global, basinal, and local influences on sedimentation during the Callovian and Late Jurassic. Rifting and rapid subsidence of the continental margins of the North Atlantic-Tethys seaway occurred during the late Early Jurassic (Sinemurian-Pliensbachian), but rapid spreading between the North American margin (Blake Spur Ridge and magnetic lineation) and the northwest African margin did not commence until the Bathonian or earliest Callovian. Site 534, drilled on marine magnetic anomaly "M-28" of Bryan et al. (1980), was initially about 150 km from either continental margin. The ?middle Callovian basal sediments are dusky red silty marl. Callovian transgression led to active carbonate platforms on the margin, recorded at Site 534 as a rise in the CCD (carbonate compensation depth), then arrival of lime-rich turbidites from the Blake Plateau platform across the Blake Spur Ridge. The host pelagic sediment is greenish black, organic-rich, radiolarian-rich, silty claystone. Hydrothermal activity on the nearby spreading ridge enriched this lower unit in metals. In the Oxfordian, the input of terrestrial silt rapidly diminished; radiolarians or other bioclasts were not preserved. The dark variegated claystone has fine-grained marl and reddish claystone turbidite beds. The late Callovian-Oxfordian Western Tethys has radiolarian chert deposition, marine hiatuses, or organic-rich sediments. The Kimmeridgian and Tithonian had a stable or receding sea level. Near the end of the Jurassic many of the carbonate platforms of the margins were buried beneath prograding fan or alluvial deposits. Carbonate deposition shifted to the deep sea. Site 534 records the deepening of the CCD and ACD (aragonite compensation depth) during the Kimmeridgian and early Tithonian, then a rise of the ACD in the middle Tithonian. Similar trends occurred throughout the Western Tethys-Atlantic. High nannofossil productivity of the seaway led to deposition of very widespread white micritic limestone in the late Tithonian-Berriasian. The underlying sediment had a slower deposition rate of carbonate, therefore its higher clay and associated Fe content produced a red marl. A short sea-level incursion occurred on the Atlantic margins during the Kimmeridgian and is reflected in the Site 534 greenish gray marl unit by numerous turbidite beds of shallow-water carbonates.

Palynofacies investigation of Callovian sediments of DSDP Hole 79-534A

During the extension of Deep Sea Drilling Project (DSDP) Leg 76 a new and previously unpenetrated lithological unit composed mainly of claystones was cored above basalt basement at Site 534 in the Blake-Bahama Basin. The Callovian part of the new unit contains interbedded 'black shales' which were hitherto unexpected in this part of the section. This Paper presents a brief palynological examination of lithofacies-kerogen relationships in these sediments and shows that their organic content is almost entirely a function of the re-deposition of terrestial and marine organic matter versus the ambient redox conditions of the depositional environment. Allochthonous organic matter inputs are highest in the interbedded turbidites and decline progressively toward the pelagic black shales in which marine organic matter is comparatively well preserved. The significance of various kerogen and palynomorph indices are discussed. The study emphasizes the absolute necessity for sedimentologically-aware sampling in all palynological and geochemical work on lithologically heterogeneous sequences.

O DISCURSO DE HUMANIZAÇÃO COMO ESTRATÉGIA DE APROXIMAÇÃO COM O CONSUMIDOR NAS PUBLICIDADES DAS MÍDIAS SOCIAIS

Este trabalho propõe o estudo analítico de estratégias discursivas das organizações empregadas nas publicidades das mídias sociais no Brasil em que, na tentativa de aproximação com os consumidores, as empresas emitem discursos de humanização. A pesquisa ocupou-se em identificar e analisar as publicidades das marcas notabilizadas nesse ambiente superabundante de informação, capazes de comunicar-se efetivamente com os consumidores, a ponto de levá-los ao engajamento com os interesses da organização pela interação e compartilhamento dos conteúdos nas mídias sociais, e de torná-los os agentes da marca, aqueles que divulgam voluntariamente os seus benefícios para a sua rede de amigos. Trata-se de uma pesquisa exploratória de teor qualitativo, cuja busca se dará pelas delineações de um espaço discursivo. Utilizou-se a análise do discurso (AD), da linha francesa, sob a perspectiva dos estudos do ethos, cenas de enunciação e contrato de comunicação que contemplam os discursos organizacionais. Além da conceituação teórica e revisão de literatura vinculadas às mídias sociais e cultura organizacional, o trabalho analisou as publicidades em vídeo publicadas no Facebook e YouTube, nos anos de 2014 e 2015, cujo intuito era a aproximação com o consumidor. A pesquisa demonstrou que o ambiente das mídias sociais requer outra postura das organizações, uma linguagem dialógica e interativa com a participação do consumidor nas suas publicidades. A supervalorização do consumidor e a sua inclusão nas narrativas é uma tentativa de humanizar as relações entre organização e seus públicos e demonstram ser o eixo conciliador entre ambos na nova ambiência midiática.

Modeling the control of DNA replication in fission yeast

A central event in the eukaryotic cell cycle is the decision to commence DNA replication (S phase). Strict controls normally operate to prevent repeated rounds of DNA replication without intervening mitoses (“endoreplication”) or initiation of mitosis before DNA is fully replicated (“mitotic catastrophe”). Some of the genetic interactions involved in these controls have recently been identified in yeast. From this evidence we propose a molecular mechanism of “Start” control in Schizosaccharomyces pombe. Using established principles of biochemical kinetics, we compare the properties of this model in detail with the observed behavior of various mutant strains of fission yeast: wee1− (size control at Start), cdc13Δ and rum1OP (endoreplication), and wee1− rum1Δ (rapid division cycles of diminishing cell size). We discuss essential features of the mechanism that are responsible for characteristic properties of Start control in fission yeast, to expose our proposal to crucial experimental tests.

Hot weather dishes /

Includes index.

The C.H.P.A. cook book : choice recipes from the members and friends of Cleveland Health Protective Ass'n /

Includes household hints; samples of menus; table of seasons for foodstuffs; some recipes include wine or liquor as an ingredient; recipes for English, French, and Cuban dishes. Sample recipes: Roast goose, Codfish on toast (Cuban style), Gingerbread pudding.

[Culinary ephemera : gelatin and tapioca].

Corporate contributors include: Genesee Pure Food Company; Jell-O-Co. Inc.

A report on a special NSF summer, 1964, computer program for undergraduates /

Mode of access: Internet.

Pest control materials, 1950: fungicides, herbicides, insecticides, rodenticides, companies, uses and active ingredients

Mode of access: Internet.

Talks upon practical subjects /

Pages 156-160 are advertisements.

A biochemic basis for the study of problems of taxonomy, heredity, evolution, etc., with especial reference to the starches and tissues of parent-stocks and hybrid-stocks and the starches and hemoglobins of varieties, species, and genera.

Mode of access: Internet.

An outline of the political and social life of George Washington, and biographical sketches of the lives of the fifty-six signers of the Declaration of Independence,

"George Washington": v. 1, p. 11-163.