Identify data sources, plan and choose equipment or resources to perform a first-hand investigation to identify microbes in food or water

Aim: to investigate the presence of microbes in food or water

Equipment:
-5x petri dish with agar jelly
-swabs
-stickey tape
-incubator
-bunsen burner
-matches
-sanitiser
-permanent marker
-loop thing
-1 refrigerated meat samples (for four hours after buying) left in bag
-1 refrigerated meat samples unrefrigerated left in bag

Method:
1. Sanitise hands, equipment must be sterile
2. Collect both samples of meat
3.swipe one sample with a sterilised inoculating loop and lightly make 's' shape on perti dish. make sure the petri dish is opened at no larger than a 30 degree angle, and that it is not opened for longer than necessary.
4. Stickey tape the petri dish and label which food source was used.
5. swipe each sample and repeat step 3 and 4, tiwce; sanitising inoculating loops between samples.
6. place in incumbator and leave for four days, ensuring the dishes remain upside down.
7. Observe daily and photgraphy dishes.
8. Use autoclav for destruction

Results: Fungi showed as furry, and bacteria as smooth. More microbes on petri dish with meat left out of fridge as it has a four hour advanced...

	Criado por shaycrystal4 quase 11 anos atrás

Biology (THE SEARCH FOR BETTER HEALTH) Notas sobre 2. Over 300 years ago the Chinese and Hebrews were advocating cleanliness in food, water and person hygiene, criado por shaycrystal4 em 17-02-2014.