Results 61 to 70 of about 372,803 (361)

Summer warming explains widespread but not uniform greening in the Arctic tundra biome

Nature Communications, 2020
Arctic warming can influence tundra ecosystem function with consequences for climate feedbacks, wildlife and human communities. Yet ecological change across the Arctic tundra biome remains poorly quantified due to field measurement limitations and ...
L. Berner, R. Massey, P. Jantz, B. Forbes, M. Macias‐Fauria, I. Myers-Smith, T. Kumpula, G. Gauthier, L. Andreu‐Hayles, B. Gaglioti, P. Burns, P. Zetterberg, R. D’Arrigo, S. Goetz   +13 more
semanticscholar   +1 more source

Neutrophil deficiency increases T cell numbers at the site of tissue injury in mice

FEBS Letters, EarlyView.
In wild‐type mice, injury or acute inflammation induces neutrophil influx followed by macrophage accumulation. Mcl1ΔMyelo (neutrophil‐deficient) mice lack neutrophils, and in response to muscle injury show fewer macrophages and exhibit strikingly elevated T‐cell numbers, primarily non‐conventional “double‐negative” (DN) αβ and γδ T cells.
Hajnalka Halász, Albert Bálint Papp, Lukács Sándor Lesinszki, Attila Mócsai, Tamás Varga, László Nagy, Péter Gogolák   +6 more
wiley   +1 more source

Phytoplankton dynamics in a changing Arctic Ocean

Nature Climate Change, 2020
Changes in the Arctic atmosphere, cryosphere and Ocean are drastically altering the dynamics of phytoplankton, the base of marine ecosystems. This Review addresses four major complementary questions of ongoing Arctic Ocean changes and associated impacts ...
M. Ardyna, K. Arrigo
semanticscholar   +1 more source

The Useless Arctic: Exploiting Nature in the Arctic in the 1870s

Nordlit, 2015
<p align="LEFT">What is the discursive genealogy of an ecological approach to the Arctic? Building on distinctions suggested by Francis Spufford and Gísli Pálsson, this article examines a specific juncture in the history of European–Arctic interaction – the reception of the Austro-Hungarian Arctic Expedition in 1874 – and traces the potential for
Spring, Ulrike, Schimanski, Johan Henrik
openaire   +8 more sources

Ergothioneine supplementation improves pup phenotype and survival in a murine model of spinal muscular atrophy

FEBS Letters, EarlyView.
Spinal muscular atrophy (SMA) is a genetic disease affecting motor neurons. Individuals with SMA experience mitochondrial dysfunction and oxidative stress. The aim of the study was to investigate the effect of an antioxidant and neuroprotective substance, ergothioneine (ERGO), on an SMNΔ7 mouse model of SMA.
Francesca Cadile, Daniela Ratto, Giorgia Rastelli, Ottavia Eleonora Ferraro, Caterina Temporini, Sunil Kumar, Simona Boncompagni, Paola Rossi, Monica Canepari   +8 more
wiley   +1 more source

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

FEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

Potential for flexible lactate shuttling between astrocytes and neurons to mitigate against diving-induced hypoxia

Frontiers in Neuroanatomy
For most non-diving mammals, lack of O2 (hypoxia) has detrimental effects on brain function. Seals, however, display a series of systemic, cellular, and molecular adaptations that enable them to tolerate repeated episodes of severe hypoxia.
Chiara Ciccone, Sari Elena Dötterer, Sigrid Vold Jensen, Cornelia Geßner, Alexander C. West, Shona H. Wood, David G. Hazlerigg, Lars P. Folkow   +7 more
doaj   +1 more source

The Seismicity of the Arctic [PDF]

Seismological Research Letters, 1929
The paper (to be published in full in J. R. Astr. Soc. Can.) presents an analysis of the data compiled at the Dominion Observatory, Ottawa, Canada, in connection with the series of publications on the “Location of epicenters” for the years 1911–1927, inclusive, together with that given in the series of “International summaries” published by Prof. H. H.
openaire   +1 more source

Single cis‐elements in brassinosteroid‐induced upregulated genes are insufficient to recruit both redox states of the BIL1/BZR1 DNA‐binding domain

FEBS Letters, EarlyView.
Phytohormone brassinosteroid‐induced gene regulation by the transcription factor BIL1/BZR1 involves redox‐dependent DNA‐binding alternation and interaction with the transcription factor PIF4. The reduced BIL1/BZR1 dimer binds preferred cis‐elements, while oxidation alters its oligomerization state and disrupts DNA‐binding ability.
Shohei Nosaki, Masae Ohtsuka, Takeshi Nakano, Masaru Tanokura, Takuya Miyakawa   +4 more
wiley   +1 more source

Comprehensive study of old ice ridges in the Arctic Ocean

Лëд и снег, 2020
In May 2015, a comprehensive study of an old ice ridge was carried out to the north of Bennett Island in the East-Siberian Sea with application of water thermal drilling, tachometric and sonar surveys, video survey by the underwater device and methods ...
Roman B. Guzenko, Yevgeny U. Mironov, Victor V. Kharitonov, Stepan V. Khotchenkov, Ruslan I. May, Viktor S. Porubaev, Sergey M. Кovalеv, Konstantin А. Kornishin, Yaroslav О. Efimov   +8 more
doaj