Microorganisms are all around us, with an amazing diversity of adaptations. They were the first life on Earth, and their relatively recent discovery in extreme environments—like hot springs, ocean vents, and polar ice—illustrates how tenaciously they've evolved and survived. Microbiology gives us insights into evolution, disease, and even the mechanisms of our own cells. Explore our collection of microbiology projects to learn more about these tiny and amazing organisms.
Crown gall is a plant disease caused by the soil bacterium Agrobacterium tumefaciens. This project uses tomato plants to investigate whether garlic extract can prevent crown gall infection.
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MicroBio_p024
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Time Required
Long (2-4 weeks)
Prerequisites
You will need a plant with an existing crown gall infection as a source of bacteria for this project.
Material Availability
Readily available
Cost
Low ($20 - $50)
Safety
Use caution when cutting with sharp knife or razor blade.
Bacteria are powerful little creatures. They can dispose of contaminants, make us sick and did you know they can even generate electricity? In devices, called microbial fuel cells (MFC) they can extract electrons from their food sources such as organic materials and feed them into an electrical circuit to generate power. This way they can even turn plain soil into a source of energy! Does it matter though what kind of food the bacteria "eat"? Find out how bacteria grow in a microbial fuel cell…
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MicroBio_p032
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Time Required
Very Long (1+ months)
Prerequisites
Previous experience using a multimeter and familiarity with the physics of electricity is helpful, but not required. A basic knowledge of how to work with bacteria is also recommended to complete this science fair project. Consult the [# ProjectGuide Name="Advanced.MicrobiologyTechniquesampTroubleshooting" Value="HtmlAnchor" HtmlText="Microbiology Techniques and Troubleshooting" #] guide for information on how to conduct microbiology experiments.
Material Availability
The needs to be special ordered from our partner
.
Cost
Very High (over $150)
Safety
Be sure to wear the gloves supplied with the kit when handling the microbial fuel cell's electrodes (its cathode and anode). The electrodes are made of a conductive material called graphite fiber and should not be placed near electronics or power plugs, or have their fibers dispersed in the air. Use sterile technique when growing the bacteria. Read the before starting any experiments. may be necessary. Adult supervision is recommended.
Have you heard that garlic powder is supposed to inhibit the growth of bacteria? Which do you think would make a better disinfectant: a solution of garlic powder or a solution of bleach? This project shows you a straightforward way to compare the effectiveness of different disinfectants (or other antimicrobial agents), by measuring zones of inhibition on a culture plate.
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MicroBio_p014
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Time Required
Average (6-10 days)
Prerequisites
To do this project, you will need access to a laboratory with facilities for culturing bacteria. You should be familiar with sterile technique and proper handling of bacterial cultures.
Material Availability
A kit for this project is available from our partner .
