The quenching of tryptophan fluorescence by dissolved O₂ gas was monitored by measuring the emission lifetimes at 348 nm in aqueous solutions. [0₂]/(10-² mol dm-³) 0 T/(10-⁹ s) 2.6 1.5 0.92 0.71 From the data above, predict the value of [O₂] required to decrease the intensity of tryptophan emission to 50% of the unquenched value. ○ 3.0 E-2 M O 0.95 E-2 M None of the choices ○ 4.3 E-2 M ○ 1.8 E-2 M 2.3 5.5 8 10.8 0.57
The quenching of tryptophan fluorescence by dissolved O₂ gas was monitored by measuring the emission lifetimes at 348 nm in aqueous solutions. [0₂]/(10-² mol dm-³) 0 T/(10-⁹ s) 2.6 1.5 0.92 0.71 From the data above, predict the value of [O₂] required to decrease the intensity of tryptophan emission to 50% of the unquenched value. ○ 3.0 E-2 M O 0.95 E-2 M None of the choices ○ 4.3 E-2 M ○ 1.8 E-2 M 2.3 5.5 8 10.8 0.57
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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![The quenching of tryptophan fluorescence by dissolved O₂ gas was monitored by measuring the emission
lifetimes at 348 nm in aqueous solutions.
[0₂]/(10-² mol dm¯³) 0
T/(10-⁹ s)
From the data above, predict the value of [O₂] required to decrease the intensity of tryptophan emission to 50%
of the unquenched value.
O 3.0 E-2 M
O 0.95 E-2 M
O None of the choices
O 4.3 E-2 M
O 1.8 E-2 M
2.6
2.3
5.5
8
10.8
1.5 0.92 0.71 0.57](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe833c206-f757-46a4-a688-c7f89c0e2faf%2Ffb4b7fa2-99dc-4ce2-889b-ecbd6606a57d%2Fp2ze0e_processed.png&w=3840&q=75)
Transcribed Image Text:The quenching of tryptophan fluorescence by dissolved O₂ gas was monitored by measuring the emission
lifetimes at 348 nm in aqueous solutions.
[0₂]/(10-² mol dm¯³) 0
T/(10-⁹ s)
From the data above, predict the value of [O₂] required to decrease the intensity of tryptophan emission to 50%
of the unquenched value.
O 3.0 E-2 M
O 0.95 E-2 M
O None of the choices
O 4.3 E-2 M
O 1.8 E-2 M
2.6
2.3
5.5
8
10.8
1.5 0.92 0.71 0.57
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