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    Família Scenedesmaceae (Chlorophyceae, Chlorococcales) do lago água preta, municipio de Belém, Estado do Pará.

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    (Família Scenedesmaceae (Chlorophyceae, Chlorococcales) do lago Água Preta, Município de Belém, Estado do Pará). Trata-se do inventário florístico da família Scenedesmaceae do lago Água Preta, parte do complexo de abastecimento de água do município de Belém, PA, efetuado a partir de quatro coletas, no período de outubro de 1992 a agosto de 1993. Os resultados mostraram que a família Scenedesmaceae está representada por 15 táxons: Crueigeniafenestrata Schimidle, C. quadrata Morren, Dicloster aeuatus Jao, Wei & Hu, Dimorphoeoeeus lunatus Braun, Seenedesmus aeuminatus (Lagerheim) Chodat varo aeuminatus, S. aeuminatus (Lagerheim) Chodat varo bernardii (G.M. Smith) Dedussenko, S. armatus Chodat varo bieaudatus (Guglielmetti) Chodat, S. indieus Philipose, S. peiforatus Lemmerrnann varo peiforatus, S. quadrieauda (Turpin) Brébisson varo quadrieauda, Seenedesmus sp., Tetrallantos lagerheimii Teiling, Tetrastrum heteraeanthum (Nordstedt) Chodat, T punetatum (Schimidle) Ahlstrom & Tiffany e Westella botryoides (w. West) De Wildeman

    Increasing the Size of a Piece of Popcorn

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    Popcorn is an extremely popular snack food in the world today. Thermodynamics can be used to analyze how popcorn is produced. By treating the popping mechanism of the corn as a thermodynamic expansion, a method of increasing the volume or size of a kernel of popcorn can be studied. By lowering the pressure surrounding the unpopped kernel, one can use a thermodynamic argument to show that the expanded volume of the kernel when it pops must increase. In this project, a variety of experiments are run to test the validity of this theory. The results show that there is a significant increase in the average kernel size when the pressure of the surroundings is reduced.Comment: Latex document, 14 pages, 4 figures, 1 page of table
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