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Human infrared vision is triggered by two-photon chromophore isomerization

Overview of attention for article published in Proceedings of the National Academy of Sciences of the United States of America, December 2014
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (99th percentile)
  • High Attention Score compared to outputs of the same age and source (96th percentile)

Mentioned by

news
19 news outlets
blogs
12 blogs
twitter
94 tweeters
patent
3 patents
facebook
19 Facebook pages
wikipedia
1 Wikipedia page
googleplus
6 Google+ users
q&a
3 Q&A threads
video
1 video uploader

Citations

dimensions_citation
69 Dimensions

Readers on

mendeley
207 Mendeley
citeulike
1 CiteULike
Title
Human infrared vision is triggered by two-photon chromophore isomerization
Published in
Proceedings of the National Academy of Sciences of the United States of America, December 2014
DOI 10.1073/pnas.1410162111
Pubmed ID
Authors

Grazyna Palczewska, Frans Vinberg, Patrycjusz Stremplewski, Martin P. Bircher, David Salom, Katarzyna Komar, Jianye Zhang, Michele Cascella, Maciej Wojtkowski, Vladimir J. Kefalov, Krzysztof Palczewski

Abstract

Vision relies on photoactivation of visual pigments in rod and cone photoreceptor cells of the retina. The human eye structure and the absorption spectra of pigments limit our visual perception of light. Our visual perception is most responsive to stimulating light in the 400- to 720-nm (visible) range. First, we demonstrate by psychophysical experiments that humans can perceive infrared laser emission as visible light. Moreover, we show that mammalian photoreceptors can be directly activated by near infrared light with a sensitivity that paradoxically increases at wavelengths above 900 nm, and display quadratic dependence on laser power, indicating a nonlinear optical process. Biochemical experiments with rhodopsin, cone visual pigments, and a chromophore model compound 11-cis-retinyl-propylamine Schiff base demonstrate the direct isomerization of visual chromophore by a two-photon chromophore isomerization. Indeed, quantum mechanics modeling indicates the feasibility of this mechanism. Together, these findings clearly show that human visual perception of near infrared light occurs by two-photon isomerization of visual pigments.

Twitter Demographics

The data shown below were collected from the profiles of 94 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 207 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 5 2%
Germany 3 1%
Japan 3 1%
Netherlands 1 <1%
United Kingdom 1 <1%
Canada 1 <1%
Portugal 1 <1%
Russia 1 <1%
Switzerland 1 <1%
Other 2 <1%
Unknown 188 91%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 63 30%
Researcher 59 29%
Student > Master 20 10%
Professor > Associate Professor 14 7%
Student > Bachelor 9 4%
Other 25 12%
Unknown 17 8%
Readers by discipline Count As %
Agricultural and Biological Sciences 40 19%
Physics and Astronomy 34 16%
Chemistry 26 13%
Engineering 17 8%
Neuroscience 17 8%
Other 44 21%
Unknown 29 14%

Attention Score in Context

This research output has an Altmetric Attention Score of 333. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 14 April 2022.
All research outputs
#72,708
of 21,569,681 outputs
Outputs from Proceedings of the National Academy of Sciences of the United States of America
#1,674
of 95,606 outputs
Outputs of similar age
#845
of 347,382 outputs
Outputs of similar age from Proceedings of the National Academy of Sciences of the United States of America
#37
of 953 outputs
Altmetric has tracked 21,569,681 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 95,606 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 34.7. This one has done particularly well, scoring higher than 98% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 347,382 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 953 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 96% of its contemporaries.