Results 71 to 80 of about 182,251 (343)
Oligocene archaeomonad stomatocysts from the Polish Central Paratethys
Acta Palaeontologica PolonicaAn unanticipated diversity of archaeomonad stomatocysts intermixed with marine plankton including diatoms, silicoflagellates, parmaleans and individual siliceous protistan scales was encountered in Rupelian diatomites from the Central Paratethys. In this
Irena Kaczmarska +2 more
doaj +1 more source
Further desmostylian remains from the upper Oligocene of Vancouver Island, British Columbia, Canada
Acta Palaeontologica Polonica, 2023 The North Pacific rim was home to an extinct group of semiaquatic marine mammals, the order Desmostylia, which superficially resembled hippos. Desmostylians are an uncommon fossil vertebrate in most localities where they occur, and Oligocene taxa ...
BRIAN LEE BEATTY
doaj +1 more source
Tectonics, volcanism, landscape structure and human evolution in the African Rift [PDF]
, 2000 Tectonic movements and volcanism in the African Rift have usually been considered of relevance to human evolution only at very large geographical and chronological scales, principally in relation to longterm topographic and climatic variation at the ...
Bailey, G., King, G., Manighetti, I.
core
Backbone Heterojunction Photocatalysts for Efficient Sacrificial Hydrogen Production
Advanced Functional Materials, EarlyView.Herein, a ‘single‐component’ organic semiconductor photocatalyst is presented in which a molecular donor is bonded to a polymer acceptor. The resultant material demonstrates exceptional photocatalytic activity for hydrogen evolution in aqueous triethylamine with an outstanding external quantum efficiency of 38% at 420 nm.
Richard J. Lyons +11 more
wiley +1 more source
The first fossil representative of the dragonfly family Synthemistidae
Acta Palaeontologica PolonicaGallosynthemis bechlyi gen. et sp. nov., described from the Paleocene maar of Menat (Puy-de-Dôme, France) is the firstever fossil record of the dragonfly family Synthemistidae. It shows the main synapomorphies of the family, viz.
Andre Nel +3 more
doaj +1 more source
Not all Humans, Radical Criticism of the Anthropocene Narrative [PDF]
, 2020 Earth scientists have declared that we are living in “the Anthropocene,” but radical critics object to the implicit attribution of responsibility for climate disruption to all of humanity. They are right to object.
Sharp, Hasana
core
Reevaluating the Activity of ZIF‐8 Based FeNCs for Electrochemical Ammonia Production
Advanced Functional Materials, EarlyView.Though receiving much attention, the field of electrochemical nitrogen reduction reaction (eNRR) to ammonia is marked by doubts about whether this reaction is possible in aqueous media. This work sheds light on this question for iron single‐atom on N‐doped carbon (FeNC) catalysts—a class of well‐known catalysts that is also worth testing for the sister
Caroline Schneider +6 more
wiley +1 more source
The earliest cowries: the origin of cypraeoid gastropods
Acta Palaeontologica PolonicaCowries, the family Cypraeidae, form a diverse and conspicuous group of gastropods living in tropical to subtropical seas. Their shell is convolute (last whorl covers all previous ones) with a narrow, slit-like siphonate aperture bearing denticles ...
Alexander Nützel +3 more
doaj +1 more source
Engineering the Cambrian explosion: the earliest bioturbators as ecosystem engineers [PDF]
, 2017 By applying modern biological criteria to trace fossil types and assessing burrow morphology, complexity, depth, potential burrow function and the likelihood of bioirrigation, we assign ecosystem engineering impact (EEI) values to the key ichnotaxa in ...
Callow, Richard H. T. +3 more
core +1 more source
Advanced Functional Materials, EarlyView.This review explores functional and responsive materials for triboelectric nanogenerators (TENGs) in sustainable smart agriculture. It examines how particulate contamination and dirt affect charge transfer and efficiency. Environmental challenges and strategies to enhance durability and responsiveness are outlined, including active functional layers ...
Rafael R. A. Silva +9 more
wiley +1 more source