Results 51 to 60 of about 35,427 (310)

Are regional stages necessary? [PDF]

open access: yes, 2005
The bipartition of the Carboniferous System adopted by the International Commission of Stratigraphy for the world stratigraphic chart is impractical in Gondwana.
Gonzalez, Carlos Roberto
core  

From source to sink in central Gondwana: Exhumation of the Precambrian basement rocks of Tanzania and sediment accumulation in the adjacent Congo basin [PDF]

open access: yes, 2016
Apatite fission track (AFT) and (U-Th)/He (AHe) thermochronometry data are reported and used to unravel the exhumation history of crystalline basement rocks from the elevated (>1000 m above sea level) but low-relief Tanzanian Craton.
Brown, Roderick   +5 more
core   +1 more source

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

open access: yesFEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka   +11 more
wiley   +1 more source

Selenium and tellurium concentrations of Carboniferous British coals [PDF]

open access: yes, 2019
The authors wish to thank Kier Group, the British Coal Utilisation Research Association (BCURA) and Uniper (E.On) for kindly providing coal samples.
Armstrong, Joseph   +7 more
core   +1 more source

Cell wall target fragment discovery using a low‐cost, minimal fragment library

open access: yesFEBS Letters, EarlyView.
LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan   +5 more
wiley   +1 more source

Chondrichthyans from the Devonian–Early Carboniferous of Belarus

open access: yesEstonian Journal of Earth Sciences, 2018
Diverse remains of chondrichthyans were found in several stratigraphic levels in 18 cores of the Devonian and Lower Carboniferous of Belarus. Most of the taxa were first reported in that territory. A new species of ctenacanthiform shark, Tamiobatis elgae, is described.
Alexander O. Ivanov, Dmitry P. Plax
openaire   +4 more sources

Geological characteristics of the Lower Carboniferous Heshirafu Formation reef in the Artashi section in the Southwest Tarim Basin

open access: yes地质科技通报
Objective Research on reefs is highly important for determining sedimentary environments and for oil and gas exploration, but relatively few studies have been conducted on Carboniferous reefs in the Southwest Tarim Basin.
Yijun WANG   +5 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Revision of the first Carboniferous palaeofloristic locality discovered in Argentina.

open access: yesActa Palaeobotanica, 2019
The first Carboniferous palaeofloristic locality recognized in Argentina is situated to the south of the Sierra Chica de Zonda in San Juan Province, Argentina.
GUSTAVO CORREA, SILVIA N. CÉSARI
doaj   +1 more source

Fossil bone histology reveals ancient origins for rapid juvenile growth in tetrapods

open access: yesCommunications Biology, 2022
Osteohistology from a growth series of Whatcheeria, an Early Carboniferous stem tetrapod, indicates rapid juvenile growth dating back to tetrapod origins.
Megan R. Whitney   +3 more
doaj   +1 more source

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