Laboratório de Tecnologia Educacional BIBLIOTECA DIGITAL               DE CIÊNCIAS

Florew from Orchid family , specie Codonorchis lessonii, known as Palomita. Found in the south of America (Patagonia and Tiera del Fuego).

58 cm in length, 125cm of wingspan. The beak and the claws are weak for a bird of prey. The legs are tall and yellow. The upper parts are black and the chest and throat are white. There is a large white spot in the inferior side near the tip of the wing. The immature is brown and striated. Distribution: From Florida (U.S.A) to Tierra del Fuego. Habitat: Thrives in any open landscape, sometimes urban areas. Diet: It is generalist. Eats either live animals or carrion. Catches insects, snails, worms, lizards, snakes, birds. Follows tractors in crops looking for earthworms.. Sometimes eats fruits, peanuts and beans. Reproduction: Builds a big nest on the top of tall trees. Lays three ...

25 cm. The supercilium is white. The plumage usually shows traces of earth. The male is slightly larger than the female and the belly is lighter. Distribution: From Canada to Tierra del Fuego. Habitat: Open fields, grasslands and suburbs, sometimes in soccer fields. Diet: Feeds mainly on beetles, but also other arthropods. Also consumes small vertebrates. Reproduction: The nest is a deep hole in the ground (1,5 to 3m of depth). Although it is able of digging its own hole it generally uses the ones dug by other animals as the armadillos. The couple lines the nest with grass and dry manure. The female lays up to four eggs. The female incubates and the male takes care of the brood. ...

35 cm. The eyes and the legs are red. Has a topknot in the head and a spur in each wing. There is a black band in the throat that begins in the forehead and ends in the chest. The belly is white, the back and the wings are grayish brown and there are green and ferruginous spots in the wings. Distribution: From Panama to Tierra del Fuego. Habitat: Grasslands, open fields, lawns and sometimes soccer fields. Diet: Insects that it catches on the ground. Sometimes catches small fish in shallow wetlands. Reproduction: The nest is made of dry leaves (mainly grass) and placed in a small depression on the ground. Each male may have two females laying their eggs in the same nest. The femal...

15 cm. It is a small sparrow with the head striated in black and white. There is a topknot and a rufous collar around the neck that is more evident in the male. The back and the wings are brown. The immature does not have bands in the head. Cinnamon and albine mutations are not uncommon. Distribution: From Mexico to Tierra del Fuego. Absent in dense forests. Habitat: Fields, crops, woods, gardens and parks in cities. Diet: Insects, seeds and occasionally human leftovers. Licks the sweet liquid produced by aphids. Reproduction: The couple establishes a territory that is fiercely protected by the male. The nest is built in short bushes or even on the ground among tall grass. The n...

Através de um programa de formação pedagógica para pós-graduandos, o grupo de Ensino de Bioquímica da Universidade Estadual de Campinas – Unicamp e da Universidade de São Paulo – USP vem promovendo o desenvolvimento de novas disciplinas especiais de bioquímica. Uma delas foi a Bioquímica da Nutrição inteiramente planejada e aplicada por pós-graduandos para alunos de graduação. Os objetivos da disciplina, o seu conteúdo e as formas de avaliação foram completamente reestruturados de modo que pudessem ser veiculados pela Internet. A versão virtual da disciplina foi oferecida para alunos da graduação durante quatro meses. Para ser totalmente veiculada pela Internet, foi c...

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.

25 cm. The upper parts are brown, the inferior light brown. There are white wingbars . The supercilium and the edging of the tail are white. Male and female are similar. Distribution: South of Amazon to Paraguay, Uruguay, Argentina and Bolivia. Habitat: Open areas with some trees or scrubs, cerrado, caatinga (Brazilian scrubland) and urban areas. Diet: Feeds on insects and spiders caught on the ground. Also eats small fruits and seeds. Sometimes prey on other bird’s eggs. Reproduction: The nest is built about 1,5m from the ground on a small tree or scrub. The external part is made of thick branches and the interior of thin roots and grass. It may have up to four broods a year, e...

30cm Members of the Caprimulgidae family are very difficult to tell apart. The best clues to recognize the Pauraque are its very typical song and the fact that it is one of the few nighthawks to get so close to urban areas. The Pauraque spends the whole day quietly sat on the ground, so well camouflaged that it is almost impossible to see. It remains quiet when approached, but when you are too close the bird flies in a fast zig-zag, and lands few meters away. It is curious to notice that even landing close it is difficult to see. The eggs are laid directly on the ground and have an earthy color. The Pauraque can be easily seen on dirt tracks at night, when its eyes reflect the carsâ...

There are three other very similar species from the same genus in Brazil. The females and imature individuals are nearly impossible to tell apart, as they are light brown with some darker streaks. The Saffron Finch can be distinguished from the other species for the saffron color, mostly in the breeding season. The Orange-fronted Yellow Finch ( S. columbiana) is smaller than the Saffron Finch, the Stripe-tailed Yellow Finch (S. citrina) has greenish patches on the upper parts and the Grassland Yellow Finch (S. luteola) has brownish spots even in the head. One of the countryside’s most famous birds, the Saffron Finch’s song is unique for its beaty and complexity. Unfortunately its song...

11,5cm. Identification: there is no other Brazilian species like this bird, at least not in urban and disturbed areas. Formerly all the house wren populations ranging from Canada to Chile were considered as a single species, but after several studies the populations south to Mexico were renamed as the Tropical House Wren (Troglodytes musculus ). This hyperactive bird hops non-stop on the ground in search for the small invertebrates it feeds on, reminding a mouse (musculus = mouse ). It only perches to rest or to sing. Its song is very complex and melodic, like other well known members of the Troglodytidae family. It is famous for the breeding behavior, as this bird may nest in the mos...

15 cm. The male is dark grey with the top of the head black. There are white spots in the tip of the tail’s feathers and in the wings, in a pattern that is similar to other antshrikes. The female is brown. Distribution: From Peru and Bolivia to Uruguay. Absent in most of the Amazon. Habitat: Mostly in Forest borders, gallery and secondary forests. Diet: Arthropods. Beats the wings to shake the foliage, catching the insects that are scared. Reproduction: The male offers the female some food before mating. The couple builds a nest with stems and moss. The female lays three white eggs with red dots. Generally the male incubates during the day and the female in the night. The par...

25 cm. The body is brownish grey, with the upper parts darker . The tip of the tail is white. There are two horizontal black bands in the sides of the head and on the wings. The male is bluish on the top of the head. Distribution: South America. Habitat: Open fields, cerrado, caatinga, crops, parks, lawns, urban areas. It is benefitted by deforestation Diet: Mainly grains, but also small fruits. When breeding also consumes snails and millipedes. Reproduction: During courtship the male produces a low sound different from its usual one. The male exhibits its strength to the female and the couple caresses each other in the head. The nest is a platform made of sparse sticks built on t...

O módulo interativo apresenta um esquema do operon lac em nível cromossômico contendo o gene regulador lacI, os genes estruturais lacZ, lacY e lacA, os promotores, terminadores e operadores. Além disso, indica o RNA mensageiro correspondente ao operon e as enzimas que são sintetizadas a partir dele. Na porção inferior, é descrita de forma incompleta a função e os nomes de cada enzima. Uma lista de palavras é apresentada à esquerda contendo as palavras que devem ser usadas para completar as lacunas. Quando completas, pode-se pressionar o botão Corrigir para obter um v ou um x caso as lacunas tenham sido preenchidas correta ou incorretamente, respectivamente. Além disso, há tamb...

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�rvore até 6m; extremidade dos ramos estriada, nós marcados; folha simples, oposta, estípula interpeciolar, triangular, pecíolo delicado, 3 X 0,2cm pubescente, lâmina elíptica, ápice acuminado, base atenuada, 12-15 X 4-5,5cm, margem inteira, levemente irregular, ciliada, venação camptódroma, 11 pares de nervuras secundárias, avermelhadas, conspícuas na face abaxial, terciárias pouco conspícuas, membranácea, tricoma tomentuloso concentrados nas nervuras, ráfides conspícuas na face adaxial visíveis com o auxílio de lupa.

A criopreservação de sêmen é uma tecnologia de grande impacto na industria agropecuária, principalmente na bovinocultura. Entretanto, o grande sucesso do congelamento de sêmen bovino não tem sido atingido na espécie eqüina. Existe uma série de fatores que limitam sua utilização em inseminação artificial (IA), dentre eles o menor potencial fertilizante do sêmen criopreservado. A análise do sêmen é um procedimento rotineiro na avaliação do potencial fertilizante de um reprodutor. Porém, há controvérsia não só em relação à importância dos vários parâmetros do espermiograma na predição de fertilidade, mas também sobre os conceitos de subfertilidade, infe...

Programa de áudio em que dois operários (um deles, estudante do período noturno do Ensino Médio) discutem as funções de algumas estruturas celulares, fazendo comparações com a fábrica em que trabalham. Isso leva à percepção de que a célula é uma unidade autônoma e transformadora de matéria e energia.

Programa de áudio em que dois primos encontram-se após alguns anos, quando um deles visita a terra natal em algum lugar do interior do Brasil. O visitante surpreende-se pelas alterações que o principal rio da região sofreu no período em que esteve ausente, principalmente ao se deparar com a contaminação pelo escoamento do esgoto, a eutrofização e o assoreamento.

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�rvore até 9m; extremidade dos ramos cilíndrica, estriada, glabra; folha simples, alterna, espiralada, estípula deltoide, 0,5cm compr., estriada, glabra, avermelhada no material seco, pecíolo canaliculado, 0,4 X 0,1cm, glabro, nigrescente no material seco, lâmina oblonga a estreito-elíptica, às vezes oval, ápice acuminado, base atenuada às vezes cuneada, 10,5 X 3,5cm, margem inteira, revoluta, ondulada no material seco, membranácea a cartácea, venação camptódroma, ca. 9 pares de nervuras secundárias, pouco conspícuas, venação terciária perpendicular à nervura principal, paralela, pouco conspícua, glabra, f...

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�rvore até 15m; extremidade dos ramos levemente achatada, estriada, glabra; folha simples, oposta, estípula interpeciolar, deltóide, 0,7cm compr., coléteres envolvendo a região basal interna das estípulas, pecíolo canaliculado, estriado, 1,5 X 0,1cm, glabro, lâmina elíptica, elíptico-oboval, elíptico-oval, ápice curto-acumindado, base cuneada, 16,5 X 8cm, margem inteira, revoluta, cartácea, venação camptódroma, 7 pares de nervuras secundárias, paralelas, mais conspícuas na face abaxial, ás vezes oposta a sub-oposta, venação terciária inconspícua, glabra, pontuações esbranquiçadas, diminutas, numerosas...