ARA 20

You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.

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

+ terface/acellus_engine.htm?ClassID=1467683063 Use the data below to determine the mass ratio of iron to oxygen for compound 2. Compound 1 2 Et onal Academy of Science. All Rights Reserved. Mass Fe (grams) 15.55 20.98 [20:1 Enter the answer that belongs in the green box. Iron Ratio Cmpd 2 Mass O (grams) 4.45 9.02 Sh Enter

Read the following short piece titled "The Status of Qualitative Research in Criminology." by Jody Miller, read pages 69- 72. Discuss the validity and reliability issues in relation to qualitative studies.

Enter the expression 147N+α714N+α, where αα is the lowercase Greek letter alpha. Express your answer as a chemical expression..

Bucks McGee, after being poisoned, is currently being treated in the hospital with an antidote- the chemical Fe(CN)18. The compound is so intensely coloured that even a small amount of it makes for a black or dark blue suspension. 2022-02-0. Given that this antidote has never before been administered at the hospital, none of the doctors or nurses have experience with it. There is one very old bottle of Fe>(CN)18 pills in the medicine store-room, but the label is worn and the units are in the old, archaic British Apothecaries' system which has unusual units like drachms, scruples, grains, and mites: 453.6 grams (g) = 1 pound (Ib) = 12 ounces (3) = 96 drachms (3) = 288 scruples (3) = 5760 grains (gr) = 115200 mites (m) ruu useu tnis antidote long ugu at dnother hospital, and who seemed to remember that they used to make 0.025 M solutions of this compound in ethanol and give 45 mL of the solution three times daily. What critical information is missing from the worn label? How many pills…

Discuss the similarities and differences between the following terms applied in a particular kind of forensic analysis.  Enzyme inhibition assay and enzyme-linked immunosorbent essay

Oo.158. Subject  :- Chemistry

If the a and b loci are 16 mu apart in humans and an A B / a b woman marries an a b / a b  man.  What is the probability that their first child will be A b / a b?   0.08 0.16 0.32 0.84 0.64

professor Scimemi has accepted you as a Master’s student and you are involved in a project that studies the cellular basis of neuropsychiatric diseases. For your electrophysiology recordings you have to make a recording solution containing (in mM): 119 NaCl, 2.5 KCl, 2.5 CaCl2, 1 MgCl2, 26.2 NaHCO3, 1 NaH2PO4, 22 glucose. You need 800 ml of it. How much KCl do you need to weigh out? Hint: we only care about KCl here. (MW KCl is 74.55 g/mol

2. Platinum and other group 10 metals often act as solid phase hydrogenation catalysts for unsaturated hydrocarbons such as propylene, CH3CHCH2. In order for the reaction to be catalyzed the propylene molecules must first adsorb onto the surface. In order to completely cover the surface of a piece of platinum that has an area of 1.50 cm² with propylene, a total of 3.45 x 10¹7 molecules are needed. Determine the mass of the propylene molecules that have been absorbed onto the platinum surface.

The radioisotope cobalt-60 is a strong gamma-emitter. It would be useful for   analyzing materials for internal defects   nuclear fuel   chemical reactions involving cobalt   injecting into a person to get internal x-ray pictures

Scientists study the impact of changing only one component of a cancer treatment in a laboratory. Which of the following describes the study? controlled experiment observational study conceptual model computational study

5. The color change of a chemical indicator requires an overtitration of 0.03 mL. Calculate the percent relative error if the total volume of titrant is a. 50.00 mL b. 10.00 mL 6. From the Gaussian (normal) error curve, what is the probability that a result from a population lies between 0 and +1 σ of the mean? What is the probability of a result occurring that is between +1 σ and +2σ of the mean?

Read and interpret the following information using the following abstract from a scientific journal article. In 2-3 sentences, summarize what you understand from this research

Sodium chlorate crystals are easy to grow in the shape of cubes by allowing a solution of water and sodium chlorate to evaporate slowly. a. If V is the volume of such a cube with side length x, calculate dV/dx when x = 3 mm and explain its meaning (be specific). b. Show that the rate of change of the volume of a cube with respect to its edge length is equal to half the surface area of the cube.

What is the significance of selecting a "representative" sample for chemicalanalysis, and how does this practice ensure accurate and reliable results withrespect to chemical analyses?

3. In patients with early stage lung cancer, stereotactic body radiation therapy (SBRT) has greatly improved survival in patients unable to undergo surgery. In tumors 100 Gy 10 BED have demonstrated significantly improved survival, when compared with doses <100 Gy 10. What is the BED of the following protocol? Would you suggest increasing the dose, or does it appear adequate, assuming the given information? What would you expect as the most likely side effect of therapy for this patient? 3 fractions of 15 Gy delivered every other day.

According to Wikipedia, Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was developed in the late 1940s at the University of Chicago by Willard Libby, who received the Nobel Prize in Chemistry for his work in 1960. It is based on the fact that carbon- 14 is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen. The resulting carbon-14 combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire carbon-14 by eating the plants. When the animal or plant dies, it stops exchanging carbon with its environment, and thereafter the amount of carbon-14 it contains begins to decrease as the carbon-14 undergoes radioactive decay. Measuring the amount of carbon-14 in a sample from a…

Which of the hypothetic equations below is incorrectly balanced:   a. 2 X + 3 Y2Z4  → 1 X2 (Z4)3 + 6 Y2   b. 2 D2F4G + 5 G2 → 4 DG2 + 4 F2G   c. 2 KLMN3  → 1 K2MN3 + 1 MN2 + 1 L2N   d. 1 J12B22C11 → 12 J + 11 B2C   e. 1 ABC4 → 1 AB + 2 C