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11E.2 The observed fluorescence lifetime in the absence of a quencher is 1.4 ns. In the presence ...
2. Dansyl chloride fluoresces maximally at 450 nm. If the observed fluorescence lifetime is 0.777 ns....
2. Dansyl chloride fluoresces maximally at 450 nm. If the observed fluorescence lifetime is 0.777 ns. If the quantum yield is 0.40, what is the intrinsic fluorescence lifetime?
In the absence of added quenchers, the fluorescence quantum yield is found to be 30%. Calculate...
In the absence of added quenchers, the fluorescence quantum yield is found to be 30%. Calculate the fluorescence lifetime under these conditions on the assumption that the fluorescence decay is monoexponential. 10 mM NaI causes the fluorescence yield and lifetime both to decrease to 10% of their original values. Calculate the Stern-Vollmer quenching constant.Calculate the bimolecular rate constant for the quenching by NaI.
*The quenching of tryptophan fluorescence by dissolved O2 gas was monitored by measuring emission lifetimes at...
*The quenching of tryptophan fluorescence by dissolved O2 gas was monitored by measuring emission lifetimes at 348 nm in aqueous solution. Determine the quenching rate constant for this process from the following data. [O2] (10-2mol dm-3) 0 2.3 5.5 8 10.8 T/ns 2.6 1.5 0.92 0.71 0.57 ------------------------------------------------------------------------------------------------------------------------------------------------------------ When benzophenone is illuminated with ultraviolet light, it is excited into a singlet state. This singlet changes rapidly into a triplet, which phosphoresces. Triethylamine acts as a quencher for the triplet....
The fluorescence lifetime of a dye used as the donor molecule for FRET is 4.0ns. In...
The fluorescence lifetime of a dye used as the donor molecule for FRET is 4.0ns. In the presence of the acceptor the lifetime of the donor decreases to 1.8ns. a) Calculate the efficiency of energy transfer for this donor-acceptor pair. b) If the Foster radius for this pair R0 is 40A, calculate the distance (in Angstroms) between the donor and the acceptor assuming that in this sample the value of k2=2/3.
3. Below is a Lineweaver-Burke plot of an enzyme reaction in the presence and absence of...
3. Below is a Lineweaver-Burke plot of an enzyme reaction in the presence and absence of an inhibitor. 2.4 2.3 2.2 2.1 2 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 0.9 0.8 < 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 . . . . . -1 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 O 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1/[S]...
Problem 3. Let C be the curve with implicit equation (x2 + (1 – 2)2 +2...
Problem 3. Let C be the curve with implicit equation (x2 + (1 – 2)2 +2 – 1)2 = 2(x² + (1 – 2)2) in the first quadrant of the xz-plane, shown below. Z 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 х 0.5 1 1.5 (a) Find the x-coordinate of the point on C for which z=0. (b) Let & be the outward-oriented surface created by revolving C about the z-axis. Let F(x, y, z) = yi + 2xj+zºk....
Please do 4 and 5 MAT2572 Probability and Mathematical Statistics Final Exam Name o Show your work. Your answers mus...
Please do 4 and 5
MAT2572 Probability and Mathematical Statistics Final Exam Name o Show your work. Your answers must be neatly written and logically organized to receive full credit. 1. (10) The tributed with a standard deviation of 400 hours. Suppose that a randotn sample resulted in an average lifetime of 9000 hours. Obtain a 95 percent of the mean lifetime of such a tube. e life of a particular brand of television picture tube is known to be...
Question 2 (a) A small electric vehicle is propelled by a motor with the performance data...
Question 2 (a) A small electric vehicle is propelled by a motor with the performance data shown in Figure Q2 below. The motor drives a gear with 12 teeth, which in turn drives a larger gear, which is attached to the vehicle's driving wheels. The diameter of the driving wheels is 380 mm and the vehicle is designed for a speed of 30 km/h. (Note: Errors of +10% in reading data from the graphs are acceptable for the purposes of...
2. List the expected spectral data of 2-ethyl-3-hydroxy-hexanal observed from an IR, a 'H-NMR and mass...
2. List the expected spectral data of 2-ethyl-3-hydroxy-hexanal observed from an IR, a 'H-NMR and mass spectrum. CH3 -CH2 CH C-Hal C-N C-o CEC Intensity CEN Aromatic C=C C=0 220 200 180 160 140 120 60 40 20 0 ppm 100 80 Chemical shift (8) Intensity Bonding C-H Type of Vibration (Stretching unless noted) alkane CH -CH, alkene w-m m w-m bending bending out-of-plane bending alkyne arene Frequency (cm) 2850-3000 1375 and 1450 1450-1475 3000-3100 650-1000 3300 3030 690-900 2720...
Exercise 2: Choosing Among Projects (40 points) Three mutually exclusive projects are being considered for a...
Exercise 2: Choosing Among Projects (40 points) Three mutually exclusive projects are being considered for a remote river valley: Project R, a recreational facility, has estimated benefits of $10 million and costs of $8 million; project F, a forest preserve with some recreational facilities, has estimated benefits of $13 million and costs of $10 million; project W. a wilderness area with restricted public access, has estimated benefits of $5 million and costs of $1 million. In addition, a road could...
2. Dansyl chloride fluoresces maximally at 450 nm. If the observed fluorescence lifetime is 0.777 ns. If the quantum yield is 0.40, what is the intrinsic fluorescence lifetime?
3. Below is a Lineweaver-Burke plot of an enzyme reaction in the presence and absence of an inhibitor. 2.4 2.3 2.2 2.1 2 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 0.9 0.8 < 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 . . . . . -1 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 O 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1/[S]...
Problem 3. Let C be the curve with implicit equation (x2 + (1 – 2)2 +2 – 1)2 = 2(x² + (1 – 2)2) in the first quadrant of the xz-plane, shown below. Z 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 х 0.5 1 1.5 (a) Find the x-coordinate of the point on C for which z=0. (b) Let & be the outward-oriented surface created by revolving C about the z-axis. Let F(x, y, z) = yi + 2xj+zºk....
Please do 4 and 5
MAT2572 Probability and Mathematical Statistics Final Exam Name o Show your work. Your answers must be neatly written and logically organized to receive full credit. 1. (10) The tributed with a standard deviation of 400 hours. Suppose that a randotn sample resulted in an average lifetime of 9000 hours. Obtain a 95 percent of the mean lifetime of such a tube. e life of a particular brand of television picture tube is known to be...
Question 2 (a) A small electric vehicle is propelled by a motor with the performance data shown in Figure Q2 below. The motor drives a gear with 12 teeth, which in turn drives a larger gear, which is attached to the vehicle's driving wheels. The diameter of the driving wheels is 380 mm and the vehicle is designed for a speed of 30 km/h. (Note: Errors of +10% in reading data from the graphs are acceptable for the purposes of...
2. List the expected spectral data of 2-ethyl-3-hydroxy-hexanal observed from an IR, a 'H-NMR and mass spectrum. CH3 -CH2 CH C-Hal C-N C-o CEC Intensity CEN Aromatic C=C C=0 220 200 180 160 140 120 60 40 20 0 ppm 100 80 Chemical shift (8) Intensity Bonding C-H Type of Vibration (Stretching unless noted) alkane CH -CH, alkene w-m m w-m bending bending out-of-plane bending alkyne arene Frequency (cm) 2850-3000 1375 and 1450 1450-1475 3000-3100 650-1000 3300 3030 690-900 2720...
Exercise 2: Choosing Among Projects (40 points) Three mutually exclusive projects are being considered for a remote river valley: Project R, a recreational facility, has estimated benefits of $10 million and costs of $8 million; project F, a forest preserve with some recreational facilities, has estimated benefits of $13 million and costs of $10 million; project W. a wilderness area with restricted public access, has estimated benefits of $5 million and costs of $1 million. In addition, a road could...
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