Let's say that you have a green solution that is made up of a mixture of a yellow chemical and a blue chemical. What A value would be a reasonable choice for: max v analyzing the yellow chemical? v analyzing the blue chemical? v analyzing the green color? A. 430 nm B. 500 nm C. 625 nm D. 660 nm E. average of the yellow and blue chemicals F. 525 nm G. The green color is composed of two chemicals so you cannot analyze it.
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- The pH probe/meter uses following equations: Ecell = L + 0.0592 log a1 = L - 0.0592 pH Where L = L1 + EAg/AgCI + Easy= constants L1 = - 0.0592 log a2 a1 = activity of analyte solution a2 = activity of internal solution How will measured pH value be affected vs “real” pH if the temperature of the sample is 30C when pH was measured ? a.measured pH is lower than real pH b.impact can not be determined c.measured pH is higher than real pH d.measured pH is same as real pHThe graph below is a standard curve generated by plotting the distance travelled by the size standards on an SDS-PAGE gel. If a protein band moved to a distance of 2 cm, the approximate Mol. Wt. of that protein is 17 KDa 70 KDa Not enough information 100 KDaUsing the equation for the best-fit straight line through your data, the average absorbance of your unknown samples U1 and U2, and any dilution factors (DON’T LEAVE OUT THE DILUTION FACTOR), calculate the concentration of protein in the original unknown protein sample. y = 1.6849x + 0.0414R² = 0.9904
- If you were given the task of determining the approximate % solute of potato cells. You decide to set up a series of 10 cups ranging from dH2O to 1% sucrose solution. You intend to drop a potato stick in each cup. a. What data would I need to collect for each potato stick? b. Why would I need to look for the solutions that have no effect on the potato stick?The pH probe/meter uses following equations: Ecell = L + 0.0592 log a1 = L - 0.0592 pH Where L = L1 + EAg/AgCI + Easy= constants L1 = - 0.0592 log a2 a1 = activity of analyte solution a2 = activity of internal solution How will measured pH value be affected vs “real” pH if HCl in pH electrode, became 0.15M instead of 0.1M ? a.impact can not be determined b.measured pH is higher than "real" pH. c.measured pH is lower than "real" pH. d.measured pH is same as "real" pH.A 10,000L bioreactor may have 100 trillion cells. Let’s assume that this cell solution has the same density as water a. How many cells per kilogram is this? b. How many cells does the typical human body have? c. What cell density is this (per kg)?
- You have a 1000X stock solution of sodium chloride (NaCl). The concentration of NaCl in the stock solution is 5M. a)How would you make 300mL of a 1X solution? b)What is the concentration of NaCl in your 1X solution?Please answer the question below and show all your work. You are given a pure protein sample to characterize and provided the following information: Its molar extinction coefficient, ε280, is 0.25 liters micromole^-1 cm^-1 Using a 0.5 cm pathlength cell, you measure the absorbance at 280 nm of a 20- fold dilution of your pure protein in solution (by this, we mean that 50 ul of the protein sample was diluted to a final volume of 1 ml) and find A280 = 0.40. What is the original concentration of the protein before dilution?You are given a protein solution with a concentration of 0.15 mg/ml. We need 10 μg for an experiment. What volume of the protein solution do we need?
- Table 2. Volume of BSA, protein content, and absorbance readings of reference solutions Solution Volume of BSA standard solution (μL) Protein content(μg/mL) Absorbance value At 595 nm 1 0 0 0 2 10 1 0.022 3 30 3 0.065 4 50 5 0.106 5 70 7 0.178 6 100 10 0.299 7 120 12 0.380 Make a graph by plotting the absorbance values versus the BSA protein content (in μg) for theseven reference solutions. When constructing the graph, be…if you had a protein sample solution of unknown concentration which gave an absorbance of 0.992 after the two-fold dilution (25 μL water + 25 μL sample). If the standard curve we constructed. what would you need to do to your sample in order to find its protein concentration more accurately?Explain why the curve is not completely matched when temperature rise and then fall We should put the oligomer into the water bath quickly after heating at 90 degree.