Results 21 to 30 of about 1,431,470 (343)

New Yuomys rodents from southeastern Qinghai-Tibet Plateau indicate low elevation during the Middle Eocene

open access: yesFrontiers in Earth Science, 2023
Yuomys are medium-sized Hystricomorpha rodents. They are known for coming from areas of low elevation in China during the middle and late Eocene. Two new Yuomys were discovered from a locality near Xueshuo village in Litang County, Sichuan Province.
Xijun Ni   +18 more
doaj   +1 more source

Lithostratigraphy of a long, fossiliferous Oligocene sequence: Revisiting Saint Jacques, Nei Mongol, China

open access: yesFrontiers in Earth Science, 2023
For a hundred years the Saint Jacques area has been known to produce rich Oligocene vertebrate fossils, yet only a handful of previous studies have focused on this area.
Bian Wang   +31 more
doaj   +1 more source

New Working-Class Studies [PDF]

open access: yes, 2005
In this book, contributors trace the origins of the new working-class studies, explore how it is being developed both within and across fields, and identify key themes and issues.
Linkon (Editor), Sherry Lee   +1 more
core   +2 more sources

Provenance does matter: links between winter trophic segregation and the migratory origins of European robins [PDF]

open access: yes, 2016
Amongst migratory species, it is common to find individuals from different populations or geographical origins sharing staging or wintering areas.
Bearhop, Stuart,   +7 more
core   +1 more source

Airway remodeling: The Drosophila model permits a purely epithelial perspective

open access: yesFrontiers in Allergy, 2022
Airway remodeling is an umbrella term for structural changes in the conducting airways that occur in chronic inflammatory lung diseases such as asthma or chronic obstructive pulmonary disease (COPD).
Birte Ehrhardt   +7 more
doaj   +1 more source

A Unified Mechanism on the Formation of Acenes, Helicenes, and Phenacenes in the Gas Phase. [PDF]

open access: yes, 2020
A unified low-temperature reaction mechanism on the formation of acenes, phenacenes, and helicenes-polycyclic aromatic hydrocarbons (PAHs) that are distinct via the linear, zigzag, and ortho-condensed arrangements of fused benzene rings-is revealed. This
Ablikim, Utuq   +8 more
core   +1 more source

RNA Back and Forth: Looking through Ribozyme and Viroid Motifs

open access: yesViruses, 2019
Current cellular facts allow us to follow the link from chemical to biochemical metabolites, from the ancient to the modern world. In this context, the “RNA world„ hypothesis proposes that early in the evolution of life, the ribozyme was ...
Marie-Christine Maurel   +3 more
doaj   +1 more source

Diet of the earliest modern humans in East Asia

open access: yesFrontiers in Plant Science, 2022
Reconstructing diet can offer an improved understanding toward the origin and evolution of modern humans. However, the diet of early modern humans in East Asia is poorly understood.
Yan Wu   +7 more
doaj   +1 more source

Origin of Life Prize [PDF]

open access: yesOrigins of Life and Evolution of Biospheres, 2011
A retired west-coast (U.S.A.) business man has surprised the origin of life community by announcing a major prize for origin of life research. The $50,000 award and up to $2,000,000 in potential research funding are offered “…for the best original proposal pertaining to the study of the origin of life on Earth, including an outline of work to be ...
openaire   +2 more sources

Algumas controvérsias sobre a origem da vida Some controversies on the origin of life

open access: yesQuímica Nova, 2008
In the present paper some controversies on the origin of life are discussed. Did the first living beings on Earth have an autotrophic or heterotrophic origin? What did come first, genetic code or metabolism? Were cells invented early?
Dimas A. M. Zaia   +1 more
doaj   +1 more source

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