Search

Results 1 - 12 from 12 Found materials (New search)
<Previous [1] Next> 

  • Category: Image
  • Note: Nota inteiraNota inteiraNota inteiraNota inteiraNota vazia
  • Downloads: 1.757
  • Visits: 46.648

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.

Leia Mais
  • Category: Link
  • Note: Nota inteiraNota inteiraNota inteiraNota inteiraNota metade
  • Downloads: 4.805
  • Visits: 26.366

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.

Leia Mais
  • Category: Image
  • Note: Nota inteiraNota inteiraNota inteiraNota inteiraNota inteira
  • Downloads: 479
  • Visits: 25.812

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...

Leia Mais
  • Category: Image
  • Note: -
  • Downloads: 480
  • Visits: 26.721

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 ...

Leia Mais
  • Category: Image
  • Note: -
  • Downloads: 424
  • Visits: 19.417

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...

Leia Mais
  • Category: Image
  • Note: -
  • Downloads: 892
  • Visits: 16.382

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...

Leia Mais
  • Category: Image
  • Note: -
  • Downloads: 894
  • Visits: 4.577

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.

Leia Mais
  • Category: Thesis or Monograph
  • Note: Nota inteiraNota inteiraNota inteiraNota inteiraNota inteira
  • Downloads: 44
  • Visits: 8.180

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...

Leia Mais
<Previous [1] Next> 
Results 1 - 12 from 12 Found materials (New search)