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Agar

Preparation & Use

Agar is a gelatinous material extracted

from certain marine algae. It is used for

gelling foods and as a bacteria culture

medium. Nutrient agar will resemble

a solution something like Jell-O

with

beef soup. It is not edible and should

not be ingested.

Contents:

2 plastic petri dishes

2 packets of Nutrient Agar

(Use one packet per petri dish)

Instructions:

1. Boil 2 tablespoons of distilled water.

2. Add entire contents of one package of

Nutrient Agar to the boiling water.

3. Mix solution until the agar is

completely dissolved. The solution

will start to resemble a jelly mixture.

4. Pour the agar solution into one

petri dish.

5. Refrigerate to gel (about 30 minutes).

6. After the solution turns into a waxy

gel, turn the dish over and draw

pie-cut sections on the bottom and

up the sides. Number each section.

7. Re-draw the sections on paper to

record which sample is in each section.

8. Next, use a clean toothpick to collect

a sample of what you want to test by

rubbing it on the sample’s surface,

then rub it on one section of the agar.

9. Cover the dish and leave it in a warm,

draft-free area for 24 to 48 hours.

10. Leaving the dish open and exposed

to the air is another way to collect

samples floating around on the

breeze. You can even sneeze on

the gel and see what grows.

11. By turning the dish upside down it

allows for less moisture to collect.

12. It's best to use a magnifier to

see the results. See your dealer

for various magnifiers available

from Learning Resources.

WARNING! NOT A FOOD PRODUCT.

DO NOT INGEST.

ER2583 Ages 8+

Learning Resources Ltd., King’s Lynn, Norfolk (U.K.)

Please retain our address for future reference.

Agar made in USA LRM 2583-TG

Preparation & Use 1

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Page 1 - Preparation & Use

AgarPreparation & UseAgar is a gelatinous material extractedfrom certain marine algae. It is used forgelling foods and as a bacteria culturemedium

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Learning Resources LER2583 Manuel d'utilisateur

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