I agree with what you are saying. My bacteria is very specific in its growth requirements and the media selected will not allow for growth. It also has a long generation time, something like 6 hours or so. There probably is some carry over replication as well as some death. I'm only...
I'm not concerned with any increase in CFUs during the first 2 hours. The division time is pretty high. The 2 hour numbers aren't really the problem as I am just measuring the number that have successfully invaded at that time. At 48 hours, I expect an increase in numbers of CFUs. My...
Ok, this is a "stupid" question that I probably should really know the answer to. I am researching bacterial invasion and replication within host cells, A. polyphaga to be exact. I grow the amoeba into a monolayer, add a certain number of bacteria to each sample, and allow them to incubate for...
Thanks so far and I get those two points and was kind of how I can tell what their states are. I guess what I am having a hard time seeing is what the electrons are doing. All I can see is that CO is 6 electrons short when compared with CO2 which is the correct number of valence electrons. CO...
I know this is going to be a very simple question to ask so I hope to not bore anyone. I am having trouble with redox reactions. Not so much in completing them but in understanding them. The problem that I have is telling when something is reduced or oxidized. I know if it gains electrons...
Sorry it took a little bit to respond but I got busy at school. I was think the same way you were and was confused. As it is explained to me, the number of cell divisions is needed to determine the total cells over time. Since there were so many cells present, we were told to use # of...
Homework Statement
I have to calculate the mutant frequency from a bacterial culture. We were looking at mutations in the lac operon due to the ability to easily see when the mutation occurred. A lac- culture was plated on lacXMM and TSA. The number of revertants on the lacXMM was calculated...
I am taking my second semester of organic this summer. We are working on IR Spectroscopy and mass spectrometry in class. Is there anywhere that anyone knows about that may put it all together? Or can anyone maybe give me some tips on how to remember all of the main functional groups? I am...
I was getting ready for a test in my physics class and have a question that I cannot figure out. Why does adding a dielectric to a capacitor cause the amount of charge that can be stored to increase. I understand what a dielectric is and how a capacitor works but am just not sure why this...
That is the whole proble. I remember overhearing the professor and another student talking about converting amu to kg. I plugged in the conversion and got the answer. It has been a long week and day. Guess my brain is still fried from the calculus test tonight. Thanks for the help.
Homework Statement
What is the root mean square speed of Helium at 5K?
Homework Equations
Vrms=sqrt((3kbT)/m)
The Attempt at a Solution
I plugged all the numbers in and keep getting 7.19*10-12. The computer keeps telling me that it is not correct. The next question ask for the...
We used 6.25 mL of 6M HCl and 6.25 mL of 6M NH4OH. Placed in beaker under hood. When vapors stopped from beaker, we moved to a hot plate se at ~250F. It took about 15 minutes or so for the resultant water to evaporate. This was done in my chem lab for school. I was working on a report and...
Trying to make sure my calculations were correct. We were tasked to make 2 grams of NH4Cl. Our proposed method was using HCl and NH4ClOH. This was confirmed as our best way.
The way I figured it was that 2 grams of ammonium chloride was 0.037519 moles. We used 6M hydrochloric acid and 6M...
I see that but it still leads to (2*pi*.9)/1.1 s=5.14 m/s. If you use 1.8 as the radius then it works out to 10.28 m/s. I have already missed this question in my homework so I am just trying to figure how they got what they got.