Thinking it Through ch 8

You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C₃₄H₃₂FeN₄O₄, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 30.5 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample?

2. Which of the following statements is FALSE regarding the log-kill hypothesis? a. It predicts the 100% eradication of cells after some period of time. b. It is an application of first-order kinetics. c. It predicts that cell counts decrease exponentially with repeated cycles of application. d. It applies to sterilization as well as other fields such as chemotherapy. e. Each cycle of application kills the same fraction (or %) of cells just prior to that cycle.

You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C₃₄H₃₂FeN₄O₄, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 34.9 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample?   -don't prematureley round

From the data in Table 2.5, compute the concentration of the undiluted and diluted ovalbumin samples (make sure to account for the appropriate dilution factors, DF, in the computation).

2 W S Type your answer to the following: Consider the steps the student took in the following scenario. Then describe anything the student did wrong and how it would have affected the student results (too high, low, or unchanged) and why. X A student forgot to weigh the filter paper prior to filtering the salt from the sand. To make up for this, the student weighed a different filter paper from the box and used that mass in the calculations. Edit View Insert Format Tools Table 12pt Paragraph # 3 80 F3 E D $ 4 C 888 R LL F BI U % 5 V F5 T G MacBook Air 6 F6 Y B T² & 7 H F7 A U N * 00 8 J 1 ( 9 M K O F10 L X P

1. What are fibers and where are they found? How could forensic scientists use fibers to solve a crime?   2. Define the word probative. What is the probative value of a fiber in a forensic investigation?     3. Describe steps you would take from collecting a fiber(s) at a crime scene to performing an analysis to determine its identity.     4.  Which of the 6 fiber types you observed are natural? Which are man-made?     5.  Are fibers classified or individualized? Why?

7. Theophylline was administered to a patient at dosing rates of 600 mg/day and 1200 mg/day and the respective steady-state concentrations were found to be 9.8 mg/L and 28.6 mg/l. Find Km and Vmax Determine the dosing rate to achieve a Css of 15 mg/l.

The initial population size was 790 jackelopes. After only 3 year(s), a new count was taken revealing 685 jackelopes. Assuming the population of jackelopes is best modeled with an exponential function, estimate the number of jackelopes in the count taken after a total of 8 years

Help Explain one effective or ineffective aspect of this graph.

Example 2

HDPE and PS are both inert to bases and acids, which plastic would you rather chose to put 1 Liter of 6M HCl for general chemistry lab? Explain why.

4. Now that you know how to take measurements from the video, it's time to determine the trial you will use for your calculations.   Pick your first trial based on your birth month: Trial 1: January, February, or March Trial 2: April, May, or June Trial 3: July, August, or September Trial 4: October, November, or December   Which is the first trial you will observe?

What are the advantages of a microscale lab?