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  • Category: Image
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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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Animações em Biologia Celular

AnimaÃÃes (em flash) sobre vÃrios temas de bioquÃmica e biologia celular: aminoÃcidos e proteÃnas, visÃo geral da funÃÃo celular, membranas celulares, estrutura do cromossomo, difusÃo, DNA, meiose, evoluÃÃo e metabolismo energÃtico da cÃlula. A ediÃÃo em portuguÃs à do Prof. Dr. Luis Fernando Marques-Santos, do Departamento de Biologia Molecular e da mÃdica Larissa Cunha Rodrigues da UFPB; o autor das animaÃÃes à o biÃlogo John Kyrk.

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  • Category: Handout or Class Script
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Aprendizado e memória

Esse trabalho à resultante de notas de aula da disciplina de sistemas de memÃria (ministrada por mim) do curso de pÃs-graduaÃÃo em neuropsicologia na Faculdade de CiÃncias MÃdicas da Unicamp. Por ser voltado a um pÃblico heterogÃneo, os tÃpicos foram abordados separadamente em um nÃvel de complexidade acessÃvel a um leitor nÃo especialista. O texto traz definiÃÃes sobre os sistemas de memÃria, o conteÃdo emocional e suas implicaÃÃes no comportamento, alÃm da funÃÃo do sono no processo de consolidaÃÃo de memÃrias.

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  • Category: Image
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Fork-tailed Hummingbird ( Eupetonema macroura )

15cm Identification: it is one of the largest hummingbirds. It is easily identified by the forked tail, reminding a pair of scissors. Unmistakably Brazilianâs best known hummingbird, this magnificent animal is also one of the most belligerent ones. It fiercely defends its territory â usually consisting of a flowering patch â against other birds, especially the bananaquit ( Coereba flaveola ). It sucks sweet water from feeders even if these are place in the interior of the houses, fearlessly entering the rooms. Like other hummingbirds it feeds mostly on nectar but also on insects. The female lays 2 or 3 eggs in a small bow-shaped nest and feeds the nestlings mainly with arthropo...

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Guira Cuckoo ( Guira guira )

44 cm. The tail is long and there is a topknot. The ventral region is white. The wings are dark brown with black and white streaks. Distribution: From the state of Amapà to Uruguay. Habitat: Open fields, cerrado and caating, also in landscapes modified by man. Diet: Feeds on arthropods and small vertebrates. Reproduction: The nest may be individual or collective. It is built about 5m from the ground. The female lays up to 7 eggs, but there may be more than 20 eggs in collective nests. In the collective nests there is great competition for food among the hatchlings and few them survive. Natural history: When perched it waves its tail, swinging the body in a way that some peo...

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Chalk-browed Mockingbird ( Mimus saturninus )

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 birdâs 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...

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  • Category: Image
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Saffron Finch ( Sicalis flaveola )

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 countrysideâs most famous birds, the Saffron Finchâs song is unique for its beaty and complexity. Unfortunately its song...

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  • Category: Image
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Tropical House Wren ( Troglodytes (aedon) musculus )

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...

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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 GoiÃs. Habitat: Grasslands, open fields, crops and secondary forest borders. Diet: Grains. Reproduction: The couple lives ...

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Variable Antshrike ( Thamnophilus caerulescens )

15 cm. The male is dark grey with the top of the head black. There are white spots in the tip of the tailâs 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...

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Whistling Heron ( Syrigma sibilatrix )

53 cm. It is a beautiful heron with the upper parts grayish blue, the neck and the ventral region brownish yellow. The face is blue. Distribution: Open areas from Colombia to Argentina. Habitat: Unlike other herons it may be found very far from the water, thriving in open fields and only occasionally in wetlands. Diet: Feeds on mollusks, amphibians, lizards and insects, mainly grasshoppers. Hunts on the ground revolving the earth and grass with its beak. Reproduction: The courtship is very complex, beginning with displays of the male on the ground and then in the air. The nest is very simple and is built on tall trees. Lays 2 to 4 bluish grey eggs. Natural history: It is often...

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Gnaisse

Nome: Gnaisse Local de ocorrÃncia: Faixa Leste do municÃpio de Campinas FormaÃÃo a qual pertence: Complexo Itapira Tipo de rocha: Rocha MetamÃrfica CaracterÃsticas da rocha: rocha resultante da deformaÃÃo de granitos ou de sedimentos arcÃseos. Ã uma das rochas mais antigas do mundo. DescriÃÃo visual: Possui bandeamentos, ou faixas, resultado da segregaÃÃo de seus minerais escuros (mÃficos), dos claros (fÃlsicos). DescriÃÃo da textura (ao tato): Ã uma rocha de alta dureza, bastante Ãspera e rugosa. Solo de alteraÃÃo (Saprolito): apresenta textura silte a silte-arenosa, com diferentes graus de alteraÃÃo devido ao diaclasamento e a complexidade estrutural, mantend...

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Célula vegetal

IlustraÃÃo de CÃlula vegetal mostrando as organelas que a compÃe: nÃcleo, retÃculo endoplasmatico rugoso e liso, ribossomos, complexo de golgi, vacÃolo, mitocÃndria e cloroplasto.

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  • Category: Software
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Cromatografia ascendente em papel de aminoácidos

A cromatografia consiste num mÃtodo de anÃlise de componentes de uma mistura complexa baseada em diferentes critÃrios: adsorbilidade, solubilidade, massa molecular, carga iÃnica e afinidade. A aplicaÃÃo desta metodologia à um importante item do conteÃdo programÃtico das disciplinas de BioquÃmica. Este Objeto de Aprendizagem corresponde à simulaÃÃo laboratorial de uma Cromatografia Ascendente em Papel de AminoÃcidos. Ele foi desenvolvido com a ferramenta Adobe Flash CS3 usando animaÃÃes e imagens representativas coletadas de um experimento real. Este objeto de aprendizagem à um suporte adequado para o ensino prÃtico de BioquÃmica bÃsica.

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  • Category: Thesis or Monograph
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Sentidos e práticas: a educação ambiental construída por professores participantes do projeto Ribeirão Anhumas na Escola

Esta pesquisa tem como objetivo compreender o processo de produÃÃo de sentidos de educaÃÃo ambiental e evidenciar as prÃticas pedagÃgicas utilizadas para o tratamento das questÃes ambientais por duas professoras do subgrupo âEnsino Fundamental IIâ, participantes do projeto de formaÃÃo continuada intitulado âRibeirÃo Anhumas na Escolaâ, realizado durante os anos de 2007 a 2010, em Campinas/SP. Buscamos identificar: i) os procedimentos metodolÃgicos utilizados pelas professoras para abordar a temÃtica ambiental; ii) o papel ocupado pela educaÃÃo ambiental nas prÃticas pedagÃgicas iii) os repertÃrios argumentativos que foram mobilizados no processo de produÃÃo de sent...

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  • Category: Thesis or Monograph
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Sistematização e avaliação de aulas práticas sob uma abordagem investigativa

As aulas prÃticas sÃo fundamentais para o desenvolvimento de habilidades relacionadas ao aprendizado de ciÃncias. A American Society for Biochemistry and Molecular Biology (ASBMB) listou uma sÃrie de habilidades que os estudantes devem desenvolver atà o final de um programa de BioquÃmica e Biologia Molecular, sendo a maioria delas adquirida em aulas prÃticas. O aprendizado da prÃtica de investigaÃÃo cientÃfica à um dos objetivos das aulas prÃticas. Esse trabalho propÃe a sistematizaÃÃo e avaliaÃÃo uma sequÃncia didÃtica que contemple o conteÃdo de BioquÃmica aliado ao desenvolvimento de habilidades de investigaÃÃo cientÃfica. A sequÃncia foi estruturada e aplicada n...

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Results 1 - 20 from 23 Found materials (New search)