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Effect of Nitrate and Phosphate Levels on the Growth of Algae
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Nitrate and phosphate are useful as fertilizers in agriculture and gardening. Nitrate ...

Nitrate and phosphate are useful as fertilizers in agriculture and gardening. Nitrate and phosphate aid agricultural production by producing more abundant crops. However, since the mass production of ammonia during the 1940's by way of the Haber process, it has been noted that a phenomenon known as “nitrate pollution” may occur. This pollution can be demonstrated by conducting this simple experiment. This experiment demonstrates two main ideas. The first is a test of what levels of nitrate and phosphate allow for optimum algal growth. The second demonstrates at which levels of nitrate and phosphate algal blooms may occur, causing harm to an aquatic ecosystem (Freeman, 2002).

Subject:
Biology
Material Type:
Activity/Lab
Provider:
Niagra University and Dr. Robert G. O’Donnell Middle School
Provider Set:
American Society for Microbiology
Author:
Mark Gallo and Shannon Ventresca
Extracting DNA from a Banana
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The soft flesh of a banana provides a ready source of DNA. ...

The soft flesh of a banana provides a ready source of DNA. Using a few simple purification steps in a classroom setting, students can yield loads of crudely prepared DNA. To begin, the banana is mashed in a detergent/salt solution to lyse the cellular and nuclear membranes. Cellular lysate is strained, then the solubilized DNA is cleansed with a meat tenderizer (which contains an enzyme that breaks apart proteins). Lastly, ethanol is added to generate soft, white, globs of DNA and perhaps – with careful technique – slender threads that may be wound onto a glass rod.

Source For Microbiology: The American Society for Microbiology is dedicated to the utilization of microbiology and microbiological sciences for the promotion of human welfare and for the accumulation of knowledge.

Subject:
Biology
Genetics
Material Type:
Activity/Lab
Provider:
Niagra University and Dr. Robert G. O’Donnell Middle School
Provider Set:
American Society for Microbiology
Author:
Mark Gallo and Shannon Ventresca