Results 81 to 90 of about 16,935 (229)
ABSTRACT The pursuit of simultaneously high wear resistance and excellent lubrication in multi‐principal element alloy (MPEA) composites is often hindered by a fundamental trade‐off, which is exacerbated by the agglomeration of high‐content graphene reinforcements.
Wen‐Ting Ye +10 more
wiley +1 more source
Mineralogy and Formation of a Platinum Placer Deposit, Southern South Island, New Zealand
Placer platinum group minerals (PGM), with subordinate detrital gold, have been concentrated in Pleistocene coastal sands near the present Foveaux Strait shoreline. This study characterises the PGM in what is New Zealand's only identified PGM deposit.
Marshall Palmer, Dave Craw
wiley +1 more source
The Eurasian steppe area has been a dynamic vegetation biome during the Pleistocene with its repeated cycles of forest advances and retreats. Such a scenario allows the evolution of ecotypes at the ecotone with the potential for parallel evolution in different parts of the distribution area.
Dirk C. Albach +4 more
wiley +1 more source
Tree Stands and Their Productivity Dynamics at the Upper Growing Limit in Khibiny on the Background of Modern Climate Changes [PDF]
Within the ecotone of the upper limit of woody vegetation on the southeastern macroslope of the Khibiny Mountain ridge (Kola Peninsula), the spatial and age structure, as well as features of the phytomass accumulation of spruce–birch stands, were studied.
Bubnov, M. O. +4 more
core
Adaptive Significance of Nickel Hyperaccumulation by Plants
Metal hyperaccumulation may enhance plant fitness through multiple, non‐exclusive mechanisms, including elemental defense against herbivores and pathogens, altered pollinator interactions, and increased reproductive performance in metal‐rich soils. Metals may also affect plant–plant interactions via elemental allelopathy and improve stress tolerance ...
Molly E. Waddington +2 more
wiley +1 more source
Large‐scale hydro‐climatology of the terrestrial Arctic drainage system [PDF]
The large‐scale hydro‐climatology of the terrestrial Arctic drainage system is examined, focusing on the period 1960 onward. Special attention is paid to the Ob, Yenisey, Lena, and Mackenzie watersheds, which provide the bulk of freshwater discharge to ...
Bromwich, David H. +5 more
core +1 more source
Regional targeting of the Russian economic policy: an institution for spatial planning of territories [PDF]
This article aims at assessing the state of Russian economy amid lower energy prices and the “exchange of sanctions” and identifying the priorities for Russian economic policy as a universal institution capable to support the stability and systemic ...
Tatarkin, A. I.
core +2 more sources
Evolution and Climate Adaptation in Eurasian Gyrfalcon Populations
This reports the influence of past, current and future Arctic climate change to the evolution of Eurasian gyrfalcons (Falco rusticolus), and reveals that its current evolutionary potential is insufficient to cope with the ongoing Arctic warming. ABSTRACT Climate change is considered a key driver for shaping ecological and evolutionary processes of ...
Xin Liu +10 more
wiley +1 more source
Crop calendars for the US, USSR, and Canada in support of the early warning project [PDF]
New crop calendars are produced for U.S. regions where several years of periodic growth stage observations are available on a CRD basis. Preexisting crop calendars from the LACIE are also collected as are U.S.
Hodges, T. +2 more
core +1 more source
Host species determines egg size in Oriental cuckoo [PDF]
© 2018 The Zoological Society of London.The Oriental cuckoo Cuculus optatus is an obligate brood parasite associated with species of the genus Phylloscopus.
Bachurin +54 more
core +2 more sources

