A student is using a program to analyze the digital image of a colorimetric assay. The student measures pixel intensity (gray value) of a blank sample with 230 and of a standard sample with 149. What is the absorbance equivalent value of the standard sample? State your answer using 3 significant figures.
Homework Answers
Add Answer to:
A student is using a program to analyze the digital image of a
colorimetric assay. The...
A student is using a program to analyze the ditigal image of a colorimetric assay. The...
A student is using a program to analyze the ditigal image of a colorimetric assay. The student measures pixel intensity (gray value of a blank sample with 230 and of a standard sample with 149. What is the absorbance equivalent value of the standard sample? State your answer using 3 signifiant figures.
A student measures the absorbance of a sample of red dye #3 using a spectrophotometer. If...
A student measures the absorbance of a sample of red dye #3 using a spectrophotometer. If the absorbance is measured as 0.468, what is the concentration of red dye #3 in the sample? Enter your answer in units of micromolar to three significant figures. n the lab spectrophotometer, d = 1.00 cm. For Red dye #3, ε = 7.96 x 104 M-1 cm-1.
(10 pts) Consider optimal global thresholding using Otsu's method to segment a digital image into two...
(10 pts) Consider optimal global thresholding using Otsu's method to segment a digital image into two classes Cị and C2. Otsu's method is optimum in the sense that it maximizes the between-class variance oß = P1(m1 – mg)2 + P2(m2 – mg)?, where Pi (i = 1, 2) is the probability that a pixel is assigned to class Cị, mi is the mean intensity value of the pixels assigned to class Cị, and mg is the average intensity of the...
n the lab spectrophotometer, d = 1.00 cm. For Red dye #3, ε = 7.96 x...
n the lab spectrophotometer, d = 1.00 cm. For Red dye
#3, ε = 7.96 x 104 M-1 cm-1.
Question 1 1 pts A student measures the absorbance of a sample of red dye #3 using a spectrophotometer. If the absorbance is measured as 0.223, what is the concentration of red dye #3 in the sample? Enter your answer in units of micromolar to three significant figures.
A student prepares a caffeine standard solution that has a concentration of 1858 ppm. To prepare...
A student prepares a caffeine standard solution that has a concentration of 1858 ppm. To prepare a calibration curve, the student pipets various volumes of the standard solution into 50.0 mL volumetric flasks and dilutes to the fill line with water. The absorbance of each solution is measured in a 1.00 cm cuvette using the spectrophotometer and is shown in the table below. Calculate the concentration of each solution and create a calibration curve using the absorbance data provided. Based...
4. (a) Determine the experimental concentration of protein in the unknown solution in mg/mL using the...
4. (a) Determine the experimental concentration of protein in the unknown solution in mg/mL using the Part II Data Table and the equation on page 2 for the absorbance assay at 280 nm. Hint: Convert the molar concentration (M or moles/liter) of BSA from absorbance assay at 280 nm method to mg/mL, assume that the molecular weight of BSA = 66.5 kDa [7 points 6500 g/mol Post-lab 10 Report Form: Determination the Concentration of a Protein You must show your...
A student performed an experiment using the same setup as the one used in the lab...
A student performed an experiment using the same setup as the one used in the lab "Newton's Laws." Their sample data is provided in the table below. Mass, kg Acceleration, m/s2 0.015 0.028 0.025 0.073 0.035 0.130 0.045 0.174 0.055 0.221 Copy this data into Graphical Analysis and use it to make an acceleration vs. net force graph. Determine the mass (in kg) of the moving system using the slope of the graph. (Enter your answer to at least three...
A student performed an experiment using the same setup as the one used in the lab...
A student performed an experiment using the same setup as the one used in the lab "Newton's Laws." Their sample data is provided in the table below Mass, kg Acceleration, m/s2 0.015 0.025 0.035 0.045 0.055 0.027 0.073 0.121 0.179 0.227 Copy this data into Graphical Analysis and use it to make an acceleration vs. net force graph. Determine the mass (in kg) of the moving system using the slope of the graph (Enter your answer to at least three...
A student performed an experiment using the same setup as the one used in the lab...
A student performed an experiment using the same setup as the one used in the lab "Newton's Laws." Their sample data is provided in the table below. Mass, kg Acceleration, m/s2 0.015 0.028 0.025 0.073 0.035 0.130 0.045 0.174 0.055 0.221 a. Copy this data into Graphical Analysis and use it to make an acceleration vs. net force graph. Determine the mass (in kg) of the moving system using the slope of the graph. b. Make a print screen of...
State the number in scientific notation and write the number of significant figures in each of...
State the number in scientific notation and write the number of significant figures in each of the following numbers. Explain your answer. 1. a. 37.60 b. 0.0130 c. 13000 d. 1.2300 Perform the indicated operations to the correct number of significant figures using the rules for significant figures 2. a. 37.60 x 1.23 b. 6.7/8.975- c. 3.765+1.2+37.21 To get credit, specify the rule you used to round your results 3. Three students make measurements (in m) of the length of...
A student is using a program to analyze the ditigal image of a colorimetric assay. The student measures pixel intensity (gray value of a blank sample with 230 and of a standard sample with 149. What is the absorbance equivalent value of the standard sample? State your answer using 3 signifiant figures.
(10 pts) Consider optimal global thresholding using Otsu's method to segment a digital image into two classes Cị and C2. Otsu's method is optimum in the sense that it maximizes the between-class variance oß = P1(m1 – mg)2 + P2(m2 – mg)?, where Pi (i = 1, 2) is the probability that a pixel is assigned to class Cị, mi is the mean intensity value of the pixels assigned to class Cị, and mg is the average intensity of the...
n the lab spectrophotometer, d = 1.00 cm. For Red dye
#3, ε = 7.96 x 104 M-1 cm-1.
Question 1 1 pts A student measures the absorbance of a sample of red dye #3 using a spectrophotometer. If the absorbance is measured as 0.223, what is the concentration of red dye #3 in the sample? Enter your answer in units of micromolar to three significant figures.
4. (a) Determine the experimental concentration of protein in the unknown solution in mg/mL using the Part II Data Table and the equation on page 2 for the absorbance assay at 280 nm. Hint: Convert the molar concentration (M or moles/liter) of BSA from absorbance assay at 280 nm method to mg/mL, assume that the molecular weight of BSA = 66.5 kDa [7 points 6500 g/mol Post-lab 10 Report Form: Determination the Concentration of a Protein You must show your...
A student performed an experiment using the same setup as the one used in the lab "Newton's Laws." Their sample data is provided in the table below Mass, kg Acceleration, m/s2 0.015 0.025 0.035 0.045 0.055 0.027 0.073 0.121 0.179 0.227 Copy this data into Graphical Analysis and use it to make an acceleration vs. net force graph. Determine the mass (in kg) of the moving system using the slope of the graph (Enter your answer to at least three...
State the number in scientific notation and write the number of significant figures in each of the following numbers. Explain your answer. 1. a. 37.60 b. 0.0130 c. 13000 d. 1.2300 Perform the indicated operations to the correct number of significant figures using the rules for significant figures 2. a. 37.60 x 1.23 b. 6.7/8.975- c. 3.765+1.2+37.21 To get credit, specify the rule you used to round your results 3. Three students make measurements (in m) of the length of...
Most questions answered within 3 hours.
-
Six years of quarterly data of a seasonally adjusted series are
used to estimate a linear...
asked 14 minutes ago -
Which of the following is not an ecological model used
to foster behavior change?
PRECEDE-PROCEED Model...
asked 17 minutes ago -
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit
a golf ball with...
asked 13 minutes ago -
What are John’s potential claims if he is terminated
this week?
John is a 54-year-old man...
asked 26 minutes ago -
A (8.5) cm tall object is placed at a distance of (14.2) cm from
a convex...
asked 35 minutes ago -
(2) For the following questions, consider a data set that
exhibits a normal distribution. Report the...
asked 36 minutes ago -
What exactly is an information system? How does it work" What
are its people organization,
...
asked 37 minutes ago -
The Food Marketing Institute shows that 17% of households spend
more than $100 per week on...
asked 47 minutes ago -
Go to NCBI BLAST search web page
1st search: GEKDLRRAKDINQEVYNF
2nd search: PTSQRLQLLEPFDK
3rd search: GEKDLRRAKDINQEVYNF...
asked 50 minutes ago -
Explain how each of the following three conditions could be a
red flag for a register...
asked 55 minutes ago -
In a two-way factorial ANOVA, the final F-ratio for
factor AxB is determined by dividing _____...
asked 1 hour ago -
Show your solutions for answer.
4. An aqueous solution contains 9.21 g of
K4Fe(CN)6 in a...
asked 55 minutes ago