Results 131 to 140 of about 3,983 (257)

Uncovering hidden bias in neutron diffraction residual strain measurements

Journal of Applied Crystallography, EarlyView.
This work demonstrates that diffraction‐based residual strain calculations and uncertainty estimates depend on how grain populations are sub‐sampled, with important implications for interpreting residual stresses in heterogeneous materials with fine‐scale microstructure and strain gradients.When calculating residual strain via neutron or X‐ray ...
Cole Franz, Michael Prime, Jeffrey Bunn, Andrew Payzant, Katharine Page   +4 more
wiley   +1 more source

Rhenium isotopes reveal enhanced rock organic carbon oxidation over the Toarcian Oceanic Anoxic Event. [PDF]

Nat Commun
Stow M, Dickson AJ, Prytulak J, Dellinger M, Alcock V, Hesselbo SP, Nowell GM, Hilton RG.   +7 more
europepmc   +1 more source

Savanna soil carbon accrual occurs through particulate organic matter from grass rather than tree biomass, regardless of atmospheric CO2 levels

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Afforestation schemes in savannas are increasingly promoted as a carbon storage strategy despite threats to biodiversity. We also lack a clear understanding of how trees and grasses differentially contribute to the major carbon store in savannas, that is, soil organic ...
Heidi‐Jayne Hawkins, Michael D. Cramer, Kim J. Simpson, Sarah L. Raubenheimer, Elizabeth M. Telford, Edith J. Singini, Caroline E. R. Lehmann, Colin P. Osborne, Brad S. Ripley   +8 more
wiley   +1 more source

Methionine Salvage Enzyme Uses a Unique Mechanism to Overcome a Challenging Aldose-Ketose Isomerization. [PDF]

J Am Chem Soc
Ubayawardhana ST, Das T, Corio SA, Hirschi JS, Murkin AS.   +4 more
europepmc   +1 more source

Biological invasions disrupt the relationship between size spectrum and trophic interactions in freshwater fish communities

Journal of Animal Ecology, EarlyView.
Our study shows that non‐native species alter the relationship between the size‐spectrum slope and the predator–prey mass ratio (PPMR) in freshwater fish communities by occupying distinct trophic niches. Abstract The size spectrum, which describes the relationship between abundance (or biomass) and body size, is an ataxic approach that can provide ...
Valentin Marin, Gaël Grenouillet, Ignasi Arranz, Julien Cucherousset   +3 more
wiley   +1 more source

Stability of the marine nitrogen cycle over the past 165 million years. [PDF]

Nat Commun
Godfrey LV, Omta AW, Tziperman E, Li X, Hu Y, Falkowski PG.   +5 more
europepmc   +1 more source

A reappraisal of the Middle to Later Stone Age prehistory of Morocco Réévaluer la préhistoire du Maroc, du Middle Stone Age au Later Stone Age

Journal of the Royal Anthropological Institute, EarlyView.
Over the last 25 years, perceptions of the early prehistory of Northwest Africa have undergone radical changes due to new fieldwork projects and a corresponding growth in scientific interest in the region. Much of this work has been focused in Morocco, known for its extremely rich fossil and archaeological records in caves and rock shelters.
Nick Barton, Abdeljalil Bouzouggar, Stacy Carolin, Louise Humphrey   +3 more
wiley   +1 more source

Riverine phosphorus tracing and the influence of environmental factors in the Hanzhong catchment, upper reaches of the Danjiangkou reservoir. [PDF]

PeerJ
Guo X, Wu W, Wang Z.
europepmc   +1 more source

The morphological affinities of the fossil cranium from Kabua, Kenya Affinités morphologiques du crâne fossile de Kabua (Kenya)

Journal of the Royal Anthropological Institute, EarlyView.
Our current understanding of the origins of Homo sapiens is limited, in part, by the fragmented fossil record from Late Pleistocene and early Holocene Africa. Here, we re‐examine the Kabua 1 cranium, an enigmatic and little‐studied Kenyan fossil discovered in the 1950s. We compare virtual reconstructions created previously by our team with a wide range
Abel Marinus Bosman, Laura Tabitha Buck, Hugo Reyes‐Centeno, Marta Mirazón Lahr, Chris Stringer, Rainer Grün, Qingfeng Shao, Katerina Harvati   +7 more
wiley   +1 more source

Recent progress in studies of the last million years of human physical and behavioural evolution Avancées récentes dans l’étude du dernier million d'années d’évolution physique et éthologique de l'espèce humaine

Journal of the Royal Anthropological Institute, EarlyView.
This article presents a synthesis of recent developments in the study of human evolution over the past five years. It begins with an overview of hominin species nomenclature and diversity, followed by an examination of the proposed population bottleneck ∼900,000 years ago.
James Cole, Eleanor M.L. Scerri, Mateja Hajdinjak, Chris Stringer   +3 more
wiley   +1 more source