Results 121 to 130 of about 509,485 (382)

Temporal variation in Plio- Pleistocene Antidorcas (Mammalia: Bovidae) horncores: the case from Bolt's Farm and why size matters [PDF]

open access: yes, 2007
Morphological differences in samples of fossil (Antidorcas recki) and modern (A. marsupialis) springbok horncores suggest that the ancestral species shows less sexual dimorphism than is observed in the horn dimensions of modern springbok.
Reynolds, Sally C.
core  

Coupled Ferroelectric–Photoelectrochemical in Water Reduction Over BiFeO3 Thin Film Heterostructure Modulated by Rare‐Earth Doping

open access: yesAdvanced Functional Materials, EarlyView.
Gd‐doped BFO (BGFO) exhibits a ∼2‐order reduction in leakage current owing to its lowest content of oxygen vacancies. This leads to a ∼2.5‐fold increase in remnant polarization. These improvements in BGFO effectively boost charge separation and transportation, resulting in the greatest incident photon‐to‐current efficiency of 12.9 ± 0.73% and a ∼1.5 ...
Ming‐Wei Chu   +7 more
wiley   +1 more source

How to Recognize Mosses from Extant Groups among Paleozoic and Mesozoic Fossils

open access: yesDiversity
This paper describes a range of Paleozoic and Mesozoic mosses and assesses how far they can be referred to extant taxa at the family, ordinal, or class levels.
Michael S. Ignatov   +3 more
doaj   +1 more source

The Inclusion of False, Falsified, and Falsifiable Data that Favor an Evolutionary Worldview in the High School Science Curriculum of Public and Private Schools in the Philippines [PDF]

open access: yes, 2015
This paper examines a curricular issue in general within public and private high schools in the Philippines. This paper presents six known and documented errant points found in textbooks that promote an evolutionary worldview and are commonly found in ...
Smith, Jerry F
core   +1 more source

Design of Efficient and Mechanically Robust Anion Exchange Membrane for Water Electrolysis Achieved by Chemically Crosslinked Elastomers using Polyfluorene‐Based Conjugated Polymers

open access: yesAdvanced Functional Materials, EarlyView.
High‐performance SEBS‐PFB AEM is developed by crosslinking SEBS‐amine with polyfluorene‐based crosslinker containing benzene spacer. With the superior electrochemical and mechanical properties, SEBS‐PFB enabled an AEMWE single cell to achieve a high current density of 14.0 A cm−2 at 2.0 V and 80 °C in 1 m KOH, using a PtRu/C cathode and Ni2Fe anode ...
Hyun Soo Kwon   +8 more
wiley   +1 more source

Synergistic Fluorine and Cyanide Co‐Modification to Reinforce Photoinduced Excitons Formation and Transfer for Efficient CO2 Photoreduction

open access: yesAdvanced Functional Materials, EarlyView.
An advanced F‐doped and ─CN group co‐modified FCCN is developed. Due to the synergistic effects of co‐modification in promoting photogenerated exciton generation, enhancing charge kinetics, expanding active interfacial areas, and optimizing CO2 interfacial reactions, the FCCN photocatalyst demonstrates excellent catalytic performance and high ...
Sheng‐Qi Guo   +9 more
wiley   +1 more source

Fósseis: Mitos e Folclore [PDF]

open access: yesAnuário do Instituto de Geociências, 2005
Fossils have been familiar objects to man since the prehistoric times, with striking connotations in the folklore of several cultures. They were used as decorative elements in necklaces, regarded as heroes or giants in the classical greek and roman ...
Antonio Carlos Sequeira Fernandes
doaj  

Robust Bio‐Textiles Via Mycelium‐Cellulose Interface Engineering

open access: yesAdvanced Functional Materials, EarlyView.
This work introduces a new class of sustainable textiles by growing mycelium, the root‐like structure of fungi, into cellulose‐based fabrics. This semi‐interpenetrating mycelium‐cellulose fiber network combines the strength and breathability of natural fibers with the water‐resistant and adhesive properties of mycelium, resulting in a robust, scalable,
Wenhui Xu   +7 more
wiley   +1 more source

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