Evidence map›Paper›PMID 35423242›Full record

ReviewRSC advances2021

Chemistry of porphyrins in fossil plants and animals.

Mariam Tahoun, Carole T Gee, Victoria E McCoy, P Martin Sander, Christa E Müller

Open access · goldAbstract readReview
In one paragraph

Review in RSC advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
4.1field-weighted citation impact, top 5% 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

20 citing papers in PubMed, 72 citations in OpenAlex.

  1. Article
  2. Enhancing Electrocatalytic COPrecision chemistry · 2026
    Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Review
  9. Porphyrins are nature's workhorse.Nature chemistry · 2025
    Article
  10. Article
  11. Article
  12. iScience · 2024
    Article
  13. Review
  14. Article
  15. Increasing Reaction Rates of Water-Soluble Porphyrins forMolecules (Basel, Switzerland) · 2023
    Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. Article
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

5 authors at 3 institutions in 2 countries.

Mariam TahounPharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn An der Immenburg 4 53121 Bonn Germany christa.mueller@uni-bonn.de.ORCID https://orcid.org/0000-0001-8787-0399
Carole T GeeInstitute of Geosciences, Division of Paleontology, University of Bonn Nussallee 8 53115 Bonn Germany.ORCID https://orcid.org/0000-0001-5926-2556
Victoria E McCoyDepartment of Geosciences, University of Wisconsin-Milwaukee 3209 N Maryland Ave Milwaukee WI 53211 USA.
P Martin SanderInstitute of Geosciences, Division of Paleontology, University of Bonn Nussallee 8 53115 Bonn Germany.
Christa E MüllerPharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn An der Immenburg 4 53121 Bonn Germany christa.mueller@uni-bonn.de.ORCID https://orcid.org/0000-0002-0013-6624
University of Bonn · DEThe Huntington Library, Art Museum, and Botanical Gardens · USUniversity of Wisconsin–Milwaukee · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Porphyrins are macrocyclic tetrapyrrole derivatives that are widely distributed in nature. They are often complexed with a metal ion located in the center of the ring system and may be modified by various substituents including additional rings, or by ring opening, which leads to a plethora of different functions. Due to their extended conjugated aromatic ring system, porphyrins absorb light in the visible range and therefore show characteristic colors. Well-known natural porphyrins include the red-colored heme present in hemoglobin, which is responsible for blood oxygen transport, and the chlorophylls in some bacteria and in plants which are utilized for photosynthesis. Porphyrins are mostly lipophilic pigments that display relatively high chemical stability. Therefore, they can even survive hundreds of millions of years. The present review article provides an overview of natural porphyrins, their chemical structures, and properties. A special focus is put on porphyrins discovered in the fossil record. Examples will be highlighted, and information on their chemical analysis will be provided. We anticipate that the development of novel analytical methods with increased sensitivity will prompt new discoveries of porphyrins in fossils.

Identifiers

PMID35423242
PMCPMC8695116
OpenAlexW3132308427

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.