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4.6: Cubos de Agar (Preparación)

Última actualización

29 oct 2022
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- 4.5: Observación de ósmosis (Actividad)
- 5: Respiración celular

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Trámites

Preparar una solución al 2% de agar.
- Mezclar 20 g de agar con 1 L de agua destilada.
Calentar casi hasta que hierva. Revuelva frecuentemente hasta que la solución esté transparente.
Retirar del fuego y agregar 10 mL de solución de fenolftaleína al 1%.
- 1 g de fenolftaleína en 100 mL de etanol al 95% (Si es rosa, titrar con HCl hasta que esté claro.)
Vierte el agar en una bandeja poco profunda a una profundidad de 3 cm y dejar que se asiente (durante la noche).

Se pueden usar bandejas de silicona para cubitos de hielo. Es difícil encontrarlos en las medidas métricas adecuadas. Los cubos de 3 cm miden aproximadamente 1.2 pulgadas y hay moldes para esto.

Trámites

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