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Long-term morphological stasis maintained by a plant-pollinator mutualism (2014)

Davis, C. C. ; Schaefer, H. ; Xi, Z. ; [et al.]

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences of the United States of America. 2014; 111(16): 5914-5919. Published 2014 Apr 04. doi: 10.1073/pnas.1403157111.

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Publication Date: 2014-04-04

Print ISSN: 0027-8424

Electronic ISSN: 1091-6490

Topics: Biology , Medicine , Natural Sciences in General

Published by National Academy of Sciences

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Arenium ions are not obligatory intermediates in electrophilic aromatic substitution (2014)

Galabov, B. ; Koleva, G. ; Simova, S. ; [et al.]

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences of the United States of America. 2014; 111(28): 10067-10072. Published 2014 Jun 27. doi: 10.1073/pnas.1405065111.

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Publication Date: 2014-06-27

Print ISSN: 0027-8424

Electronic ISSN: 1091-6490

Topics: Biology , Medicine , Natural Sciences in General

Published by National Academy of Sciences

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Phylogenomics and a posteriori data partitioning resolve the Cretaceous angiosperm radiation Malpighiales (2012)

Xi, Z. ; Ruhfel, B. R. ; Schaefer, H. ; [et al.]

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences of the United States of America. 2012; 109(43): 17519-17524. Published 2012 Oct 08. doi: 10.1073/pnas.1205818109.

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Publication Date: 2012-10-08

Print ISSN: 0027-8424

Electronic ISSN: 1091-6490

Topics: Biology , Medicine , Natural Sciences in General

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Arenium ions are not obligatory intermediates [Chemistry] (2014)

Galabov, B., Koleva, G., Simova, S., Hadjieva, B., Schaefer, H. F., Schleyer, P. v. R.

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences

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Publication Date: 2014-07-16

Description: Our computational and experimental investigation of the reaction of anisole with Cl2 in nonpolar CCl4 solution challenges two fundamental tenets of the traditional SEAr (arenium ion) mechanism of aromatic electrophilic substitution. Instead of this direct substitution process, the alternative addition–elimination (AE) pathway is favored energetically. This AE mechanism rationalizes the...

Print ISSN: 0027-8424

Electronic ISSN: 1091-6490

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Morphological stasis maintained by mutualism [Evolution] (2014)

Davis, C. C., Schaefer, H., Xi, Z., Baum, D. A., Donoghue, M. J., Harmon, L. J.

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences

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Publication Date: 2014-04-23

Description: Many major branches in the Tree of Life are marked by stereotyped body plans that have been maintained over long periods of time. One possible explanation for this stasis is that there are genetic or developmental constraints that restrict the origin of novel body plans. An alternative is that basic...

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Phylogenomics resolve Malpighiales [Evolution] (2012)

Xi, Z., Ruhfel, B. R., Schaefer, H., Amorim, A. M., Sugumaran, M., Wurdack, K. J., Endress, P. K., Matthews, M. L., Stevens, P. F., Mathews, S., Davis, C. C.

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences

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Publication Date: 2012-10-24

Description: The angiosperm order Malpighiales includes ∼16,000 species and constitutes up to 40% of the understory tree diversity in tropical rain forests. Despite remarkable progress in angiosperm systematics during the last 20 y, relationships within Malpighiales remain poorly resolved, possibly owing to its rapid rise during the mid-Cretaceous. Using phylogenomic approaches,...

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Electronic ISSN: 1091-6490

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Cucumber (Cucumis sativus) and melon (C. melo) have numerous wild relatives in Asia and Australia, and the sister species of melon is from Australia (2010)

Sebastian, P. ; Schaefer, H. ; Telford, I. R. H. ; [et al.]

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences of the United States of America. 2010; 107(32): 14269-14273. Published 2010 Jul 23. doi: 10.1073/pnas.1005338107.

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Publication Date: 2010-07-23

Print ISSN: 0027-8424

Electronic ISSN: 1091-6490

Topics: Biology , Medicine , Natural Sciences in General

Published by National Academy of Sciences

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