News » Chapter 6 Microbial Growth

The Constant Battle of the Common Cold

Contributed by mnjones on Aug 13, 2013 - 12:42 PM

Ever wonder why no matter how hard you try to stay healthy and get plenty of rest, you always seem to get a cold just as winter comes around. One factor of the common cold, recently discovered by Ellen Foxman of Yale University, may be out of your control; the weather. The article, Colder Viruses Thrive in Frosty Conditions, further explains how colder temperatures have been shown to be a reason for the flare up and spread of the common cold.


The effect of (p)ppGpp on replication elongation rate in B. subtilis and E. coli

Contributed by microsummer2013 on Jun 28, 2013 - 02:38 PM

In the research field, regulation of DNA replication during the initiation phase is well known while very little is known about regulation of replication during the elongation period. The process of DNA replication is complex, and it is highly regulated by specific factors in the environment. One factor that impacts regulation is the abundance of nutrients in the cell. In the bacterium Bacillus subtilis, replication elongation is inhibited when the cell undergoes amino acid starvation. In the bacterium Escherichia coli, the same effect of amino acid starvation on the cell is observed as well.


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