A handful of you are emailing me that the link is dead. It is not dead, you are clicking the wrong link. It is the Heat Effect lab. I have checked it on three computers and a number of your colleagues have already turned it in.
Sorry for the delay. My little disease vector, or as I call him my son, gave me the second bad case of gastroenteritis for the winter.
The closures for the day at North (Maher) and Lenawee DO NOT affect Main campus. We WILL be have class today and both BIO220 and BIO161 DO have their exams today. “I thought campus was closed” will not even be entertained as an excuse.
This week’s lab will be a continuation of the Lab 6 material. This week we will focus on the Covalent Structures.
While I am grading the exam I noticed that I didn’t use the final (corrected) form of one problem and left a typo in that makes the problem unsolvable.
42. Iodine-131 is used to image thyroid tissue to determine the presence of thyroid cancer. Iodine-131 degrades through a beta followed by gamma mechanism. Determine the final product that is produced by the decay of iodine-131. If you can make a 2.0 mCi/ml solution of iodine-131 how much would have to be made 72 hours before the test (half-life: 8 hours) to make a solution with an activity of 7.4 x 10^3 Bq/ml for the test?
The last unit should have been in Bq, not Bq/ml. The question makes no sense at the end with the volume in the unit. However, much of the problem is solvable. So for the five points I will divide it as follows. One point for the decay equation. One point for the conversion of mCi/ml to Bq/ml or Bq/ml to mCi/ml. One point for the determination of the number of elapsed half-lives. If you made an effort at those you will get the last two points (even if you lost some in the previous three) for what would have been determining the amount of radiation needed and then the volume of stock needed. However, if you did not attempt the problem, or only trivially addressed it, you will not get the two final points.
My apologies, I pulled up an old draft when I printed it out.
I did not finish the rewrite in time to post it for you guys, so I will provide copies for the class with no points deductions.
Sorry for the delay, but the lab for CEM131 is posted for this week. We are doing the Radioactivity lab.
I am currently suffering through a virus exploring various portals of exit and will not be functional tomorrow. Class will be canceled and exams back on Wednesday.
This DOES NOT affect exams on Tuesday.
- CEM131 – Start Chapter 3, Daily Quiz
- No later office hours, Curriculum Meeting
- BIO220 – Exam 1 (starts at 9:00), Endospore Staining Lab
- BIO161 – Exam 1, no lab
- CEM131 – Daily Quiz, Continue in Chapter 3, Emission Spectra Lab
- BIO220 – Start Chapter 5
- BIO161 – Daily Quiz, Start Chapter 26
I have finished the first grade set for CEM131. However, you will have to wait till Monday to get your student number. The class median on the exam was a 79%, so there was no curve. In addition, a number of students scored greater than a 90% on the exam.
You need a student number to really find your grades, though you could probably do it with your quiz grades if you tried.