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  • Category: Image
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  • Downloads: 1.016
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Hymenaea courbaril L. var. altissima (Ducke) Y.T. Lee & Langenh.

Nome popular: jatobá.

Árvore até 18m; extremidade dos ramos cilíndrica, glabra, rugosa, estriada, acizentada no material seco, lenticelas diminutas, numerosas, visíveis com auxílio de lupa; folha composta, alterna, espiralada, paripinada, estípula caduca, pecíolo estriado, 1,5 X 0,2cm, glabro, peciólulo estriado, 0,2 X 0,1cm, glabro, folíolos 1 par, opostos, lâmina assimétrica, em geral falcada, elíptica a oval, ápice acuminado, base aguda a truncada, assimétrica, 6,5 X 2,5-3,5cm, margem inteira, cartácea a sub-coriácea, venação camptódroma, 6-8 pares de nervuras secundárias, conspícuas, discolores, venação terciária formando retí...

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  • Category: Software
  • Note: Nota inteiraNota inteiraNota inteiraNota inteiraNota metade
  • Downloads: 2.500
  • Visits: 13.662

Radicais Livres

O software Radicais Livres é constituído de quatro seções, com subdivisões:
(A) Fontes de produção - Descreve as fontes de produção mais conhecidas e enfatiza o papel da cadeia de transporte de elétrons na formação dos radicais livres de oxigênio.
(B) O que são e como se formam - Demonstra a estrutura química dos radicais livres e ilustra a formação dos diferentes radicais livres de oxigênio na cadeia de transporte de elétrons.
(C) Como agem e o que causam - Descreve os mecanismos de ação e os efeitos provocados.
(D)Mecanismos de proteção - Apresenta os mecanismos enzimáticos e não enzimáticos de proteção.
Artigo sobre o software foi publica...

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  • Category: Image
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  • Downloads: 536
  • Visits: 20.936

Sapphire-spangled Emerald (Amazilia lactea)

Length: 9,5cm Identification: the back is bright green, the tail and part of the wings are dark blue. The throat and the chest is sapphire-blue. The belly is white and there is a white line splitting the chest. The two sexes look alike. It is one of the main pollinators of several plant species, including some introduced ones. It is territorialist and visit the flowering patches at predictable times. It explores even the lowest flowers. This hummingbird usually explores feeders where it fights against the bananaquits ( Coereba flaveola ) and the swallow-tailed hummingbird ( Eupetomena macroura ). The bow-shaped nest usually shelters two eggs.

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  • Category: Image
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  • Downloads: 508
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White-tailed Kite ( Elanus leucurus )

35cm Identification: when seen from below its body is basically white with the tip of the wings and a region around the eyes black. There is a gray area on the upper parts of the wings. Its color pattern reminds that of some seagulls. The name in Portuguese – Gavião Peneira – means hovering hawk and it is due to the behavior of hovering before diving onto the prey. It is certainly one of the most beautiful hawks found in urban areas. It flies over open areas, pastures, crops and even on the banks of polluted streams in search for rats. This kite feeds mainly on large insects such as grasshoppers and beetles and on small rodents and lizards. The nest, made of twigs, is built on iso...

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  • Category: Image
  • Note: Nota inteiraNota inteiraNota inteiraNota inteiraNota metade
  • Downloads: 583
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Common Waxbill ( Estrilda astrild )

10,5 cm. The beak and a mask around the eye are bright red. The body is light brown, finely streaked. There may be a red region in the belly. As in other species of cage birds there is great color variation. Distribution: Originally in Africa but currently found in many places around the world. In Brazil it may be found in most of the country except from the Amazon region (where it may be found in the suburbs of big cities). Habitat: Open landscapes, fields, crops, gardens and parks. Diet: Seeds and occasionally insects. Reproduction: The nest is built by the couple in shrubs. Its walls are thick and made of grass, feathers and cotton. The entrance is hidden. Sometimes a false n...

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  • Category: Image
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  • Downloads: 458
  • Visits: 20.830

Masked Water Tyrant ( Fluvicola nengeta )

15 cm. The body is white with a band around the eye, the wing and the tail black. Distribution: From Northeastern Brazil to São Paulo. It is currently spreading its distribution southwards. Habitat: Lives in riverbanks, muddy places near lakes and ponds. Diet: Feeds mainly on arthropods, sometimes small fruits. Reproduction: The male exhibits himself standing on the body and opening the tail and the wings. The nest is spherical with a lateral entrance. It is built on small trees above the water. The white eggs are incubated by the female. Natural history: Runs on the aquatic plants, catching insects among them. Attacks other birds that enter its territory. Some people and eve...

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  • Category: Image
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  • Downloads: 520
  • Visits: 28.096

Lined Seedeater ( Sporophila lineola )

11 cm. The body of the male is dark gray in the upper parts, with the face and anterior part of the throat black. The posterior part of the throat and the belly are white, as well as the spots on the sides of the head. The female is brown with the belly lighter. It is thinner than the female of the double collar seedeater Sporophila caerulescens, the tail is longer, the beak smaller with the inferior part buffy. The young individuals are also brown. Distribution: From Guianas to Argentina and Paraguay. In Brazil from the north to São Paulo, Mato Grosso and Goiás. Habitat: Grasslands, open fields, crops and secondary forest borders. Diet: Grains. Reproduction: The couple lives is...

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  • Category: Image
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  • Downloads: 565
  • Visits: 24.814

Pale-breasted Thrush ( Turdus leucomelas )

23cm. The beak is dark, the wings ferruginous and the throat from white to light brown with faint streaks. The inferior parts are pale, sometimes white. Distribution: From Venezuela to Argentina and Paraguay. Mideast and South of Brazil. Habitat: Secondary forests, woods, gallery forests and cities, provided there are enough trees. Diet: Feeds on fruits, seeds, arthropods and earthworms. Reproduction: The female builds the nest with sticks and mud. It is usually placed in a palm tree or on walls. The male helps feeding the brood (generally three). Natural history: The name “sabiá” in Portuguese comes from Tupi (an indian language) and means “the one who prays” and is related...

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  • Category: Image
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  • Downloads: 535
  • Visits: 28.751

Rufous-bellied Thrush ( Turdus rufiventris )

24cm. Identification: it is the only Brazilian thrush with reddish belly. It is the Brazilian Symbol Bird and this title has recently been given for its strong presence in the country’s popular culture, especially in poetry and music. Although it is distributed throughout Brazil (except from the Amazon region ) it is more common near the coastline as it prefers moist environments. This thrush lives in farms, forest edges and is especially common in urban parks, being one of the most typical birds in some of Southeastern Brazil largest cities. The very beautiful song is very variable, even at the individual level.The real song can only be heard in the spring, the breeding season when th...

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  • Category: Image
  • Note: Nota inteiraNota inteiraNota inteiraNota inteiraNota inteira
  • Downloads: 1.436
  • Visits: 39.564

White-eyed Parakeet ( Aratinga leucophthalmus )

32 cm. The body is green. There is a red and yellow area below the wings. There is a pale area around the eye. The male’s body and beak are stronger than the female’s. The beak is light brown in the immature individuals. Distribution: From the Guyanas to Argentina. Habitat: Forest borders, cerrado, woods and parks in cities. Diet: Feeds on buds, leaves, flowers, seeds, fruits and sometimes insects. Reproduction: Builds a nest inside holes in trees or rocks, witnessed by the author building a nest inside a hole in the old wall of a building. Lays three or four white eggs, incubated by the female that is fed by the male during this period. The couple feeds the brood. May learn some...

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  • Category: Image
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  • Downloads: 654
  • Visits: 4.814

Licaria armeniaca (Nees) Kosterm.

Nome popular: canela.

Árvore até 7m; extremidade dos ramos esparso-pubescente; folha simples, alterna, espiralada, sem estípula, pecíolo canaliculado, 1,1 X 0,1cm, esparso-tomentuloso, nigrescente no material seco, lâmina elíptica, às vezes falcada, ápice longo acuminado, às vezes falcado, base atenuada, 11-16 X 3,5-5cm, margem inteira, ondulada, cartácea, venação camptódroma, 5-7 pares de nervuras secundárias, conspícuas, venação terciária formando um reticulado mais conspícuo na face abaxial, glabrescente, nervura central tomentulosa; fruto jovem, eliptico, 0,7(-2,8) X 0,5(-1,9)cm, com cúpula.

Distribuição:<...

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  • Downloads: 631
  • Visits: 6.225

Lonchocarpus cultratus (Vell.) A.M.G. Azevedo & H.C. Lima

Nome popular embira-de-sapo.

Árvore até 25m; extremidade dos ramos glabra, levemente estriada, lenticelas diminutas; folha composta, imparipinada, alterna, espiralada, estípula caduca, pecíolo com pulvino, sulcado, 1,5 X 0,2cm, tomentuloso a glabrescente, peciólulo espessado, 0,3 X 0,1cm, tomentuloso, folíolos 6-10, opostos, lâmina elíptica ou elíptico-oblonga, às vezes oboval, ápice longo-acuminado, base cuneada, 8-13 X 2,5-4,5cm, margem levemente ondulada, membranácea, venação camptódroma, 6-9 pares de nervuras secundárias, mais conspícuas na face abaxial, venação terciária formando retículo conspícuo, glabrescente, tricomas ade...

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  • Category: Image
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  • Downloads: 542
  • Visits: 5.393

Pseudopiptadenia leptostachya (Benth.) Rauschert

Nome popular mamica-de-porca.

Árvore até 16m, espinhos robusto no tronco; extremidade dos ramos com tricomas esparsos; folha composta, bipinada, paripinada, alterna, espiralada, com estípula diminuta, caduca, pecíolo com pulvino, 3cm compr., tomentuloso a glabrescente, nectário extra-floral pateliforme entre os folíolos basais e terminais, peciólulo com pulvino, 0,5 X 0,1cm, tomentuloso, nectário extra-floral pateliforme no ápice, folíolos 8, opostos, foliólulos 12-18, opostos, sésseis, lâmina rômbica, ápice acuminado, base cuneada em geral fortemente assimétrica, 4 X 1,5cm, margem inteira, ciliada, cartácea, venação campt...

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  • Category: Image
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  • Downloads: 926
  • Visits: 5.183

Leandra dasytricha (A. Gray) Cogn.

Nome popular: pixirica.

Árvore até 3m; extremidade dos ramos denso-longo-estrelada; folha simples, oposta, sem estípula, pecíolo canaliculado, 3 X 0,3cm, denso-estrelado, lâmina elíptica, ápice agudo a acuminado, base cuneada às vezes levemente assimétrica, 19-27 X 8-10,5cm, margem denticulada, ciliada, membranácea, venação acródroma, 2 pares de nervuras secundárias, mais conspícuas na face abaxial, venação terciária paralela, conspícua na abaxial, face adaxial com tricomas simples e estrigosos, abaxial com tricomas longos-estrelados e simples, adensando nas nervuras; fruto baga globosa, denso-estrelada, imatura, verde no material seco. ...

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  • Downloads: 1.036
  • Visits: 5.470

Calyptranthes cf. lucida Mart. ex DC.

Nome popular: araçarana.

Árvore até 15m; extremidade dos ramos glabra, achatada; folha simples, oposta, sem estípula, pecíolo canaliculado, 1 X 0,2cm, ferrugíneo-tomentoso a glabrescente, nigrescente no material seco, lâmina elíptica, ápice acuminado, base atenuada, 17 X 6,5cm, margem inteira, coriácea, venação camptódroma, ca. 24 pares de nervuras secundárias, paralelas, espaçadas ca. 0,5cm, pouco conspícuas, venação terciária formando retículo conspícuo, 2 nervuras marginais, 0,4cm e 0,1cm da margem, face adaxial glabra, abaxial ferrugíneo-tomentulosa, pontuações translúcidas, diminutas, numerosas, dispersas por toda a lâmina, visíveis com au...

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  • Category: Image
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  • Downloads: 584
  • Visits: 4.896

Coccoloba glaziovii Lindau

Nome popular: -.

Árvore até 6m; extremidades dos ramos glabra, estriada, oca; folha simples, alterna, espiralada, estípula fundida, deixando cicatriz circular evidente no ramo, pecíolo estriado, 4 X 0,4cm, glabro, nigrescente no material seco, lâmina orbicular ou amplamente oval, ápice curto-acuminado ou acuminado, base cuneada a levemente truncada, 21-27 X 11-21cm, margem inteira, membranácea, venação camptódroma, 4-6 pares de nervuras secundárias, amarronzadas, conspícuas, venação terciária formando retículo mais conspícuo na abaxial, glabra.

Distribuição: Bahia, Minas Gerais, Rio de Janeiro, São Paulo e Parané...

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Results 1 - 20 from 532 Found materials (New search)