
Contrôle qualité des yaourts
Flashcard
•
Biology
•
10th Grade
•
Hard
Simon Calafiore
Used 1+ times
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10 questions
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1.
FLASHCARD QUESTION
Front
Qu'est-ce que la coloration de Gram ?
Back
Une méthode pour visualiser le caractère Gram des bactéries.
2.
FLASHCARD QUESTION
Front
Quels sont les réactifs nécessaires pour la coloration de Gram ?
Back
Violet de gentiane, Lugol, Alcool, Fuchsine.
3.
FLASHCARD QUESTION
Front
Comment savoir si le yaourt est contaminé ?
Back
Si on décèle la présence de bactéries Gram négatives.
4.
FLASHCARD QUESTION
Front
Quelle est la première étape de la coloration de Gram ?
Back
Immerger le frottis dans le violet de gentiane pendant une minute.
5.
FLASHCARD QUESTION
Front
Que fait-on après la décoloration ?
Back
On immerge le frottis dans la fuchsine pendant une minute.
6.
FLASHCARD QUESTION
Front
À quel grossissement doit-on observer le frottis ?
Back
À l'objectif ×100 à l'immersion.
7.
FLASHCARD QUESTION
Front
Quels sont les points à comparer entre les bactéries Gram positif et Gram négatif ?
Back
Morphologie, mode de groupement, dimensions, couleur après coloration.
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