140 - Topic 6 Notes

In nature water activity is commonly influenced

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ry good oxidizers (i.e. causes other compounds to oxidize). Organisms that are able to grow in the presence of O2 are usually able to detoxify these byproducts (Figure 5.29) using specific enzymes such as catalase, peroxidase and superoxide dismutase. Since O2 is not very soluble in water, to culture aerobic microorganisms, it is necessary to aerate the culture by either shaking the tube or flask or by bubbling air into the culture medium. In contrast, growth of obligate anaerobes requires that O2 be excluded from the culture medium. Thioglycolate broth, along with the redox indicator dye resazurin, can be used as a test to demonstrate the aerobic or anaerobic growth characteristics of a given microorganism (Figure 5.26)....
View Full Document

This note was uploaded on 10/31/2011 for the course BIOL 140 taught by Professor Dr.joshneufeld during the Fall '10 term at Waterloo.

Ask a homework question - tutors are online