| Title |
Production of Guanine from NH4CN Polymerizations
|
|---|---|
| Published in |
Journal of Molecular Evolution, August 1999
|
| DOI | 10.1007/pl00006539 |
| Pubmed ID | |
| Authors |
Matthew Levy, Stanley L. Miller, John Oró |
| Abstract |
The synthesis of adenine from the polymerization of concentrated ammonium cyanide solutions is well known. We show here that guanine is also produced by this reaction but at yields ranging from 10 to 40 times less than that of adenine. This synthesis is effective at both +80 and -20 degrees C. Since high concentrations of NH(4)CN are obtainable only by freezing, this prebiotic synthesis would be applicable to frozen regions of the primitive Earth, the Jovian satellite Europa and other icy satellites, and the parent body of the Murchison meteorite. |
Mendeley readers
The data shown below were compiled from readership statistics for 49 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Mexico | 1 | 2% |
| Germany | 1 | 2% |
| Canada | 1 | 2% |
| Unknown | 46 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 8 | 16% |
| Researcher | 7 | 14% |
| Professor | 7 | 14% |
| Student > Bachelor | 7 | 14% |
| Student > Master | 5 | 10% |
| Other | 7 | 14% |
| Unknown | 8 | 16% |
| Readers by discipline | Count | As % |
|---|---|---|
| Chemistry | 21 | 43% |
| Agricultural and Biological Sciences | 6 | 12% |
| Biochemistry, Genetics and Molecular Biology | 4 | 8% |
| Physics and Astronomy | 4 | 8% |
| Earth and Planetary Sciences | 2 | 4% |
| Other | 3 | 6% |
| Unknown | 9 | 18% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. 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 13 August 2020.
All research outputs
#8,534,976
of 25,374,647 outputs
Outputs from Journal of Molecular Evolution
#493
of 1,477 outputs
Outputs of similar age
#11,275
of 34,663 outputs
Outputs of similar age from Journal of Molecular Evolution
#4
of 12 outputs
Altmetric has tracked 25,374,647 research outputs across all sources so far. This one is in the 43rd percentile – i.e., 43% of other outputs scored the same or lower than it.
So far Altmetric has tracked 1,477 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.9. This one is in the 29th percentile – i.e., 29% of its peers scored the same or lower than it.
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 34,663 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 9th percentile – i.e., 9% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 12 others from the same source and published within six weeks on either side of this one. This one is in the 8th percentile – i.e., 8% of its contemporaries scored the same or lower than it.