Results 61 to 70 of about 833,438 (302)

An enigmatic beetle with affinity to Lamingtoniidae in mid-Cretaceous amber from northern Myanmar (Coleoptera: Cucujoidea)

Frontiers in Ecology and Evolution, 2022
An enigmatic cucujiform beetle, Alloterocucus atratus Li, Leschen, Liu, and Cai gen. et sp. nov., is reported from mid-Cretaceous Burmese amber. The character combination of the new fossil is not completely consistent with any of the known cucujoid or ...
Yan-Da Li, Yan-Da Li, Yan-Da Li, Richard A. B. Leschen, Zhen-Hua Liu, Di-Ying Huang, Di-Ying Huang, Chen-Yang Cai, Chen-Yang Cai, Chen-Yang Cai   +9 more
doaj   +1 more source

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, Rhys J. Bourhill, Ewan McQueen, Sam D. Harding, Krzysztof Pawlak, Thomas Fellowes, Harry W. Capps, Alexander J. Cowan, Andrew I. Cooper, Adrian M. Gardner, Martijn A. Zwijnenburg, Reiner Sebastian Sprick   +11 more
wiley   +1 more source

Isolation of Surfactants Synthesized by the Pseudomonas Bacteria and Study of Their Properties

Innovative Biosystems and Bioengineering, 2019
Background. The important problem of biosurfactants production is biosynthesis optimization. But lack of effective isolation methods elaboration with simultaneous new costeffective products is the greatest weaknesses of existing technologies.
Tetyana Pokynbroda, Ilona Karpenko, Halyna Midyana, Oleksandr Karpenko   +3 more
doaj   +1 more source

A Flower Bud from the Lower Cretaceous of China

Biology, 2022
Background: Although various angiosperms (including their flowers) have been reported from the Yixian Formation (Lower Cretaceous) of China, which is famous worldwide for its fossils of early angiosperms, no flower bud has hitherto been seen in the Early
Li-Jun Chen, Xin Wang
doaj   +1 more source

Bayesian total evidence dating reveals the recent crown radiation of penguins [PDF]

, 2016
The total-evidence approach to divergence-time dating uses molecular and morphological data from extant and fossil species to infer phylogenetic relationships, species divergence times, and macroevolutionary parameters in a single coherent framework ...
Drummond, Alexei J., Gavryushkina, Alexandra, Heath, Tracy A., Ksepka, Daniel T., Stadler, Tanja, Welch, David   +5 more
core   +5 more sources

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

New data on the winged fruits of Carpolithus prangosoides Berry from the Eocene of western Tennessee and Kentucky

Acta Palaeobotanica, 2020
We reexamined the morphology of the winged fruits Carpolithus prangosoides Berry (later synonym: Terminalia vera Berry) from the Eocene Claiborne Formation of southeastern North America, based on original and more recently collected specimens from ...
Steven R. Manchester, Rachel G. Reback
doaj   +1 more source

From Waste to Value: Conversion of Calcium Sulfate to Vaterite via Carbon Capture and Storage

Advanced Functional Materials, EarlyView.
This study introduces a new concept for carbon management that relies on the carbonation of industrial gypsum waste and yields phase‐pure vaterite at ambient conditions without any additives. The obtained vaterite is further shown to be a reactive material that develops compressive strength in aqueous suspensions like conventional cements.
Carlos Pimentel, German Montes‐Hernández, Pablo Almarza‐Cifuentes, Matthias Kellermeier, Alexander E.S. Van Driessche   +4 more
wiley   +1 more source

Life cycle assessment of biofuels from Jatropha curcas in West Africa: a field study [PDF]

, 2009
In recent years, liquid biofuels for transport have benefited from significant political support due to their potential role in curbing climate change and reducing our dependence on fossil fuels.
Achten, Achten, Cuhna Da Silveira, EIA, Eijck, Fargione, Farrell, Foidl, Foidl, Forster, Francis, Fulton, Goel, Grimm, Gübitz, Hill, IEA, ISO 14040, ISO 14044, Kaushik, Kojima, Makkar, Martin, Ogunwole, Openshaw, Prueksakornand, Quirrin, Spaan, Tewari, Vaitilingom, World Bank   +30 more
core   +5 more sources

Pore Size Effects of Mesoporous N‐Doped Carbon Nanospheres as Advanced Support Material on the Activity of Molybdenum Sulfide Catalysts for the Hydrogen Evolution Reaction

Advanced Functional Materials, EarlyView.
By tuning the pore size of mesoporous N‐doped carbon (MPNC) nanospheres as support material for molybdenum sulfide, the electrochemical activity of the composite material for the hydrogen evolution reaction can be optimized. An ideal MPNC pore size of 60 nm allows a high number of molybdenum sulfide active sites while maintaining efficient proton and ...
Niklas Ortlieb, Christian Völker, Lars Guggolz, Anna Fischer   +3 more
wiley   +1 more source