Evidence map›Paper›PMID 31341335›Full record

ArticleThe Journal of physical chemistry1991

End-to-End Diffusion and Distance Distributions of Flexible Donor-Acceptor Systems Observed by Intramolecular Energy Transfer and Frequency-Domain Fluorometry; Enhanced Resolution by Global Analysis of Externally Quenched and Nonquenched Samples.

Joseph R Lakowicz, Józef Kuśba, Ignacy Gryczynski, Wieslaw Wiczk, Henryk Szmacinski, Michael L Johnson

Open access · greenAbstract read
In one paragraph

Article in The Journal of physical chemistry, 1991. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
3.3field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

10 citing papers in PubMed, 43 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Joseph R LakowiczCenter for Fluorescence Spectroscopy, Department of Biological Chemistry, School of Medicine, University of Maryland, Baltimore, Maryland 21 201.
Józef KuśbaCenter for Fluorescence Spectroscopy, Department of Biological Chemistry, School of Medicine, University of Maryland, Baltimore, Maryland 21 201.
Ignacy GryczynskiCenter for Fluorescence Spectroscopy, Department of Biological Chemistry, School of Medicine, University of Maryland, Baltimore, Maryland 21 201.
Wieslaw WiczkCenter for Fluorescence Spectroscopy, Department of Biological Chemistry, School of Medicine, University of Maryland, Baltimore, Maryland 21 201.
Henryk SzmacinskiCenter for Fluorescence Spectroscopy, Department of Biological Chemistry, School of Medicine, University of Maryland, Baltimore, Maryland 21 201.
Michael L JohnsonDepartment of Pharmacology, University of Virginia, Charlottesville, Virginia 22908.
University of Virginia · US

Funding

WHO'S WHO IN FLUORESCENCEP41RR008119 · NCRR · UNIVERSITY OF MARYLAND BALTIMORE · PI BASKAKOV, ILIA V · 1993 to 2006
$7.4M
NCRR NIH HHS P41 RR008119
6 · The paper itself

Abstract

We used time-dependent fluorescence energy transfer of externally quenched and nonquenched samples, and global analysis of the data, to recover the end-to-end distance distributions and diffusion coefficients of flexible fluorescent molecules in low-viscosity solution. The fluorescence decays of tryptamine covalently linked to a dansyl acceptor by a polyethylene chain of 22 methylene groups were measured by the frequency-domain method. The data were fitted using numerical solutions of the diffusion equation which predicts the time- and distance-dependent population of the excited-state donors in the presence of energy transfer, followed by transformation to the frequency domain for nonlinear least-squares fitting to the experimental data. From the simulation study we found that the time- and distance-dependent population of the excited-state donors are significantly different for nonquenched and quenched samples and that the effects of end-to-end diffusion on the donor decay is decreased by collisional quenching. Importantly, the resolution is dramatically improved by the use of simultaneous analysis of quenched and nonquenched samples. This method was applied to the tryptamine-dansyl system using acrylamide as an external quencher. The recovered initial (

Identifiers

PMID31341335
PMCPMC6650637
OpenAlexW2026312721

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.