aula 3 biologia celular - microscopias
TRANSCRIPT
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CITOLOGIAPor Luiz Philippe Sergio
“área da Biologia que estuda a célula”
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O Mundo Microscópico
Do Simples ao Composto
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1663Robert Hooke
18521750
1689Marcello Malpighi
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Robert Hooke (1635 – 1703)
• Físico, Astrônomo, Químico, Biólogo e Matemático;
• Obra Micrographia (1665) – Desenhos sobre o que ele observou ao
Microscópio;
Fotografia do desenho de cortes de cortiça, e o primeiro microscópio de Hooke.
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Anton van Leeuwenhoek (1632 – 1723)
• Em 1668 comerciante Holandês aprendeu a fabricar lentes de aumento e
construiu vários microscópios;
• Havia apenas uma lente, logo era chamado de microscópio simples;
• Seus trabalhos passaram a ser publicados na revista Philosophical
Transactions of the Toyal Society;
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Microscópios de Luz
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Microscópio EletrônicoTransmissão e Varredura
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Aumentos
Aumentos
Ocular
Objetivas 10X
4X 40 Vezes
10X 100 Vezes
40X 400 Vezes
100X 1000 Vezes
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Cortes do Material
Imagem microscópio = bidimensional
Objeto de estudo = tridimensional
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Preparação de Lâminas
• Coloração:
Para Micr. Óptico: Corantes
Para Micr. Eletrôn: Sais Metálicos
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Medidas Usadas no Estudo das Células
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Comparação de Imagens
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Diferenças Microscópicas
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Ammoplanops moenkopi (Sphecidae Pemphredoninae)
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Dryudella montana (Sphecidae: Astatinae)
Eucerceris superba (Sphecidae Philanthinae)
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Com coloração fluorescente
Sem coloração
Com coloração
Diferenças de índices de refração
Cores de interferência
Campo escuro
Diferenças Obtidas:
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Teoria Celular• Matthias Schleiden e Theodor Schwann (1810 – 1882) em 1830 publicaram a
Teoria Celular;
• “Todos os seres vivos são formados por células. As células são, portanto, as
unidades morfofisiológicas e funcionais dos seres vivos.”
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Como Estudaremos as Células?!