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Samenvatting voedingskundige analyse vitamine A

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Voedingskundige analyse vitamine A

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Uploaded on
October 6, 2017
Number of pages
8
Written in
2016/2017
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Summary

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Uitwerking voedingskundige analyse 2016-17
Literatuurbron
Vitamine
In welke bron kun je het antwoord A
vinden?
Vraag:
Wat is de functie, waar is het voor? Dierlijk = retinylesters (retinol) = de opslagvorm -> lever, melk, boter, kaas
Wat is de chemische structuur?
Plantaardig = carotenoïden (ook dierlijke producten) -> donkergroene bladgroente, geel- en
oranjekleurige groenten, fruit, melk en eidooiers

Functie: van belang voor zich bij lage lichtintensiteit, voor voortplanting, het afweersysteem,
groei en ontwikkeling




Retinol  voortplanting
Retinal  visus (lichtsignalen) en intermedia retinoïnezuur (voor de omzetting)
Retinoïnezuur  celdifferentiatie (groei, immuniteit) en embryonale ontwikkeling

, activiteit:
- 1989 = RE  1 RE = 1 microgram retinol & 1 microgram retinol = 6 microgram B-
caroteen ( 12 microgram overigen carotenen)
- 2006 NEVO = RAE  1 RAE = 1 microgram retinol & 1 microgram retinol = 12
microgram B-caroteen (24 microgram overigen carotenen)
 Bio-activiteit bleek helft lager te zijn dan voorheen vastgesteld was.
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