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Samenvatting Campbell and Reece: H7 cell structure and function

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Samenvatting van H7 uit het boek Campbell and Reece: biology. Handig voor deeltoets 1 van het vak moleculaire biologie!

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SAMENVATTING HOOFDSTUK 7: CELL STRUCTURE AND
FUNCTION

Concept 7.1
3 aspecten zijn belangrijk bij microscopie:
● Vergroting
○ Ratio tussen de echte grootte en die van het beeld
● Resolutie​ (oplossend vermogen)
○ Scherpte
○ Minimum afstand tussen 2 punten die los van elkaar gezien kunnen worden
● Contrast
○ Zichtbare verschillen in helderheid tussen verschillende structuren

Verschillende microscopen:

Licht microscopie
● Brightfield (helderveld) microscoop
○ Ongekleurd / gekleurd

● Fase contrast
○ Verschillen in dichtheid → verschillen in contrast

● Differentieel interferentie contrast (Nomarski)
○ 3D weergave

● Fluorescentie microscoop
○ Met gebruik van fluorescente markers

● Confocale microscoop
○ Gebruik van laser ipv lamp
○ Optische coupe (plakje)

● Deconvolutie
○ Meerdere optische coupes maken
○ Digitaal uit-focus licht verwijderen

● Super-resolutie microscoop
○ Individuele fluorescente moleculen weergeven

Elektronenmicroscopie ​(cellen gaan dood)
● Scanning EM
○ Oppervlakte weergeven
● Transmissie EM
○ Coupe




1

, Cel fractionering:​ scheiden van onderdelen van de cel
Stappen:
1. Homogeniseren
2. Differentieel centrifugeren (steeds harder)
● Scheiden op basis van grootte:
○ Kernen
○ Mitochondria
○ Microsomen
○ Ribosomen
Gebruik:​ bijvoorbeeld onderzoeken of bepaalde eiwitten in een bepaald organel voorkomen




2

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Which chapters are summarized?
H7
Uploaded on
October 3, 2019
Number of pages
13
Written in
2018/2019
Type
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