A student lands a summer job in a biophysics laboratory studying single cell bacteria. In order to develop an effective bacteria containment protocol it is crucial to find k for the growth rate of the bacteria. For bacteria x the student isolates a single bacterium, places it in a 1 cm x 1 cm x 1 cm container, and finds that every 10 minutes all cells in the container undergo cell division. Find kg.
In addition, it is known that after 30 divisions some of the bacteria start to die with a rate constant equal to 0.065 minute-1. Assuming that the bacteria are exactly cylindrical, have the same dimensions as E. coli, and are hexagonally close packed with cylinders lining up perfectly end-to-end, determine if it is safe to leave them unattended for 24 hours. Note that it is not safe if within 24 hours of placing the single bacterium in the container the bacteria spill over the edge of the container.© BrainMass Inc. brainmass.com October 25, 2018, 8:02 am ad1c9bdddf
The growth differential equation is given by:
Where N is the instantaneous number of bacteria and is the growth constant.
This is a very simple separable equation which is easily solved:
Where C is an arbitrary constant to be determined from initial conditions.
If at t=0 we have cells, we get from equation (1.2):
We know that the population doubles itself every time period T.
To find the connection ...
The growth rate of bacteria is found.
Real-Life Models of Logarithmic Functions.
Many different kinds of data can be modeled or measured easily using exponential and logarithmic functions. For example, consider ideal gases: Pressure versus volume give a curved plot, but a log graph of pressure versus volume provides a linear plot that is easier to interpret. Log plots are also used in the study of the rates of reactions; for many reactions, the log of remaining reactant concentration versus time is linear.
For this Discussion Board, use the Library and other resources to find at least two examples of scientific data that are measured and reported using log scales. Examples can be found in such fields as chemistry, astronomy, and geology.View Full Posting Details