| Popis: |
We are reminded continually of the presence of microorganisms in our surroundings. News reports of tainted food due to microbial contamination of chicken, beef or fruit are prevalent. Strep throat, acne and various other bacterial infections are common occurrences that are familiar to our students. As consumers, we are enticed to buy facial scrubs, mouthwashes, soaps and cleaners that inhibit bacterial growth. How effective are these products in controlling bacteria? Where do bacteria normally live? What conditions do bacteria require to live and reproduce? These questions can be readily explored in middle and secondary classrooms using the following procedure to prepare culture media that can be used for the isolation and propagation of microorganisms. This procedure was devised and tested with the following goals |
