No controls on the release of CH;CI, CH;Cl,, or CHCI, have been proposed. What does that imply about their atmospheric lifetimes, compared to those for CFCS, CCl4, and methyl chloroform?

Give a precise definition of the porphyrin ring, explain how it relates to ions and molecules, and its characteristics as well.

What is the action level of Naphthalene for marine aquatic organisms in Canada? What guidelines would this be found in?

Escherichia coli O157:H7 is a foodborne pathogen and can cause serious illness in humans by producing toxins that can severely damage the lining of intestines and kidneys. What are the oxygen requirements of coli? What result would you observe in the MTM agar deep test? Explain. Research on the growth requirements of this bacterium is required. What is the role of oxygen and cytochrome c oxidase in aerobic respiration? Why does the nitrate reduction tube turn red after the addition of zinc? Clostridium tetani is a common soil bacterium and causes tetanus. Would you expect tetani to possess the enzyme catalase? Explain. Research on the growth requirements of this bacterium is required.

Consider each reaction of yeast cells with the sugar solutions. How much time should pass between the initial reading of gas volume in the syringe and the final reading of gas volume in the syringe? 10 minutes O 10 seconds O 1 minute O2 minutes

14