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  • Category: Experiment
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  • Downloads: 243
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Observação da diversidade em ambiente aquático – Aula 1

Atividade para observaÃÃo dos seres vivos presentes num ambiente no entorno de um lago ou lagoa e coleta de Ãgua e detritos para posterior observaÃÃo de microbiota aquÃtica.

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  • Category: Experiment
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  • Downloads: 153
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Observação da diversidade em ambiente aquático – Aula 2

Atividade de preparaÃÃo de um meio para cultura de protozoÃrios e observaÃÃo microscÃpica da microbiota presente na amostra de Ãgua coletada na aula anterior.

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  • Category: Experiment
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  • Category: Presentation
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  • Downloads: 26
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Simulador Sistema-tampão

ApresentaÃÃo de slides interativa sobre o sistema-tampÃo. A apresentaÃÃo contÃm trÃs simulaÃÃes de experimento: (I) AdiÃÃo de Ãcido fraco em soluÃÃo tampÃo; (II) AdiÃÃo de Ãlcali forte em soluÃÃo tampÃo e (III) TitulaÃÃo de Ãcido fraco. Em cada experiento, Ã possÃvel ver o comportamento do Ãcido acÃtico.

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  • Category: Image
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Brazilian Duck ( Amazonetta brasiliensis )

Physical appearance: 40 cm. The feet are red and webbed. The chest is brown, as well as the face that is a bit darker. There is a patch of iridescent feathers in the wings. When flying it shows a large white spot at the back of the wing. The male has a red beak and the femaleâs is blue. The Female also has white spots on the face. Distribution: From Venezuela to Argentina. Habitat: Wetlands, lakes, ponds and rivers even in polluted places. Diet: Feeds on seeds, leaves and small invertebrates. The hatchlings are goot at catching insects. Reproduction: Lays up to 14 bluish or greenish eggs. When the adult realizes the presence of a potential predator it distracts its attenti...

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  • Category: Image
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Black Bellied Whistling Duck (Dendrocygna autumnalis)

48 cm. The face is grey, the chest cinnamon and the belly black. There is a large white spot in the wings, more evident when flying. The beak and feet are red. Males and females are similar. The immature is grayish brown Distribution: From Texas (U.S.A) to Bolivia and Argentina. Habitat: Lives in lakes, rivers, wetlands and even in mangroves. Diet: Feeds on leaves, small seeds and aquatic invertebrates. Reproduction: The nest is built on the ground or hollow trees. The eggs are white, sometimes greenish or bluish. More than one female may lay eggs in the same nest and sometimes may even lay eggs in other speciesâs nests such as the white faced whistling duck (Dendrocygna viduata...

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  • Category: Image
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Fulvous Tree-Duck ( Dendrocygna bicolor )

48cm Identification: the body is mostly cinnamon with dark streaks on the wings. It may be locally the commonest duck, especially in Southern Brazil wetlands, where its hunting is allowed provided the stateâs quotas are respected. Regarding its habitat this species tends occur in open wetlands, surrounded by grasslands. Feeds mainly by grazing small grasses on the lake shores or underwater but also eats aquatic plants, aquatic insects and small fish. It may build the nest either in a tree hole or on the aquatic plants. The female lays from 8 to 14 eggs that are sat for about one month. The offspring start to fly within 55 days after hatching.

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  • Category: Image
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  • Downloads: 492
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Common Moorhen ( Gallinula chloropus )

35 cm. The legs and the toes are long and green. Has a red shield-like structure in the forehead that is larger in the male. The neck and inferior parts are blue. The back is brown and there is a white band in the wing. The immature individuals are brown. Distribution: All over the world, except from Australia and New Zealand. Habitat: Lives in lakes, ponds and swamps, provided there is plenty of aquatic vegetation. May be found even in very polluted places and brackish water. Diet: Feeds on vegetables and aquatic insects. Usually dives to catch the food. When it does not dive it waters the food before swallowing. Reproduction: The nest is built among the aquatic vegetation. Th...

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  • Category: Image
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  • Downloads: 1.761
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MAC - Membrane Attack Complex - Complement System

Membrane Attack Complex formation through interaction of its complement system constitutive parts. The complex is typically formed on the surface of intruding pathogenic bacteria through activation of the complement system, when C5 convertase cleaves a C5 molecule into C5a and C5b. It is composed of four complement proteins (C5b, C6, C7 and C8), which bind to the outer membrane surface, and of a fifth protein, C9, polymerizing into a ring-like structure, put across the membrane and allowing free diffusion through it. This disrupts the osmotic environment of the cell and kills it promptly.

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  • Category: Handout or Class Script
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  • Downloads: 75
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A origem da diversidade

Guia do professor desenvolvido pelo projeto EMBRIAO sobre o tema: A origem da diversidade. Este guia aborda os seguintes produtos: (Ãudio): - Entrevista: Biodiversidade - CiÃnca em destaque: Biodiversidade (Experimentos): - ObservaÃÃo da diversidade em ambiente aquÃtico - aulas 1, 2 e 3 (Softwares): - DNA: ReplicaÃÃo - DNA: TranscriÃÃo - DNA: MutaÃÃo - Qual à a palavra? A origem da diversidade (VÃdeos): - Seres vivos: A vida - Seres vivos: A vida microscÃpica - Diversidade

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  • Category: Image
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  • Downloads: 74
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Limites Planetários

Todo o desenvolvimento da humanidade aconteceu no Holoceno, a Ãpoca geolÃgica que se iniciou hà cerca de 11,5 mil anos. Durante esse tempo, diversas condiÃÃes (ou variÃveis) climÃticas e ambientais ficaram relativamente estÃveis, o que permitiu a sobrevivÃncia e o sucesso do ser humano na Terra. PorÃm, nas Ãltimas dÃcadas, as atividades humanas tÃm ameaÃado cada vez mais o equilÃbrio do Sistema Terra, podendo levar a mudanÃas irreversÃveis, incompatÃveis com a nossa sobrevivÃncia e de vÃrias outras espÃcies. Cientistas tÃm identificado quais sÃo as condiÃÃes fundamentais para a regulaÃÃo do nosso planeta. Elas devem permanecer dentro de um certo intervalo de ...

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Results 1 - 17 from 17 Found materials (New search)