Results 41 to 50 of about 14,931,309 (280)

Comparative chloroplast genomics of Caryophyllaceae species: insights into sequence variations and phylogenetic evolution

BMC Plant Biology
Background Caryophyllaceae contains 100 genera and 3000 species, many of which are valuable both ecologically and economically. However, as past research has shown, the fundamental phylogenetic relationships of Caryophyllaceae are still debatable, and ...
Lucun Yang, Yongqing Zhu, Qing Hua
doaj   +1 more source

Solenysa, a Cretaceous Relict Spider Group in East Asia

Diversity, 2022
A time scale of phylogenetic relationships contributes to a better understanding of the evolutionary history of organisms. Herein, we investigate the temporal divergence pattern that gave rise to the poor species diversity of the spider genus Solenysa in
Jiahui Tian, Yongjia Zhan, Chengmin Shi, Hirotsugu Ono, Lihong Tu   +4 more
doaj   +1 more source

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan, Michael Abele, Calogero Virgone, Michaela Kuhlen, Ricardo Lopez‐Almarez, Tal Ben‐Ami, Ewa Bien, Maja Cesen, Malgorzata A. Krawczyk, Andrea Ferrari, Gianni Bisogno, Yves Reguerre, Dominik T. Schneider, Louise Galmiche, Jorg Fuchs, Sarah Braungart, Bilgehan Yalcin, Ines B. Brecht, Daniel Orbach   +18 more
wiley   +1 more source

Divergent: The Time Path of Legacy and Athlete Admissions at Harvard [PDF]

SSRN Electronic Journal, 2019
Applications to elite US colleges have more than doubled over the past 20 years, with little change in the number of available seats. We examine how this increased competition has affected the admissions advantage that legacies and athletes (LA) receive.
Peter Arcidiacono, Josh Kinsler, Tyler Ransom   +2 more
openaire   +2 more sources

Molecular Phylogeny and Evolutionary History of the Genus Cyprinus (Teleostei: Cypriniformes)

Fishes
The genus Cyprinus encompasses economically vital freshwater fish species; yet the phylogenetic relationships and evolutionary history of many taxa within this genus remain unresolved.
Yanyan Chen, Heng Xiao, Zhaoping Yue, Xiaoyun Wu, Ruiguang Zan, Shanyuan Chen   +5 more
doaj   +1 more source

Comparative Mitogenome Analyses Uncover Mitogenome Features and Phylogenetic Implications of the Parrotfishes (Perciformes: Scaridae)

Biology, 2023
In order to investigate the molecular evolution of mitogenomes among the family Scaridae, the complete mitogenome sequences of twelve parrotfish species were determined and compared with those of seven other parrotfish species.
Jiaxin Gao, Chunhou Li, Dan Yu, Teng Wang, Lin Lin, Yayuan Xiao, Peng Wu, Yong Liu   +7 more
doaj   +1 more source

The fossil record of camelids demonstrates a late divergence between Bactrian camel and dromedary [PDF]

Acta Palaeontologica Polonica, 2020
A new compilation of the Old World fossil record of Camelidae and a recent phylogenetic analysis allow a new assessment of the timing of the clade’s diversification.
Denis Geraads, Gilles Didier, Andrew Barr, Denne Reed, Michel Laurin   +4 more
doaj   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider, Kris‐Ann Schultz, Nora Schnitzler, Michael Abele, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Ines B. Brecht, Maja Cesen, Andrea Ferrari, Michaela Kuhlen, Malgorzata A. Krawczyk, Ricardo Lopez‐Almaraz, Yves Reguerre, Calogero Virgone, Daniel Orbach   +15 more
wiley   +1 more source

Estimating Divergence Times and Substitution Rates in Rhizobia [PDF]

Evolutionary Bioinformatics, 2016
Accurate estimation of divergence times of soil bacteria that form nitrogen-fixing associations with most leguminous plants is challenging because of a limited fossil record and complexities associated with molecular clocks and phylogenetic diversity of root nodule bacteria, collectively called rhizobia.
Rim Chriki-Adeeb, Ali Chriki
openaire   +4 more sources

Fast algorithms for computing phylogenetic divergence time

BMC Bioinformatics, 2017
Background The inference of species divergence time is a key step in most phylogenetic studies. Methods have been available for the last ten years to perform the inference, but the performance of the methods does not yet scale well to studies with ...
Ralph W. Crosby, Tiffani L. Williams
doaj   +1 more source