Results 51 to 60 of about 371,340 (288)
Miskoncepcie pojmov organickej chémie u absolventov základných škôl po školskej reforme na Slovensku
Scientia in Educatione, 2014 Početné výskumy dokazujú, že žiaci majú mylné predstavy v mnohých oblastiach chémie a problémy s pochopením viacerých chemických pojmov. Mylné koncepcie žiakov sú pevne zakotvené v ich kognitívnych štruktúrach, sú trváce, sú často odolné voči rôznorodým ...
Monika Mĺkva, Ľubomír Held
doaj
Advanced Materials Technologies, EarlyView.Hierarchically microarchitected PLA/S/CNT cathodes are fabricated via scalable fused filament 3D printing as high‐sulfur‐loading hosts for rechargeable lithium–sulfur batteries. The assembled Li–S cells with sulfur loadings up to 17 mg cm−2 deliver an areal capacity of 9.2 mAh cm−2 and retain 96% of their discharge capacity after 100 charge–discharge ...
Vinay Gupta +4 more
wiley +1 more source
CHIMIA, 1951 Kurze Zusammenfassung der Chemie und Physiologie der durch Paraffinoxydation gewonnen Fettsäuren und der daraus hergestellten Glyceride.
K. E. Schulte, W. Weisskopf
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A Stepwise [4 + 3] Cycloaddition Reaction of the 1,3-Diphenyl-2-azaallyl Anion [PDF]
, 1993 The 1,3-diphenyl-2-azaallyl anion (1) undergoes [3 + 2] cycloaddition reactions with the s-cis-fixed 1,3-dienes 8-11. In contrast, 1,1,2,2,3,3-hexamethyl-4,5-bis(methylene)cyclopentane (7) reacts with 1 to give the [4 + 3] cycloadduct 13 and the linear 1,
Anh +23 more
core +1 more source
Nanocrystal Quality–Controlled Scintillation in Porous YAG:Ce Aerogels
Advanced Optical Materials, EarlyView.High‐temperature thermal treatment of YAG:Ce nanoscintillator aerogels increases light yield under ionizing radiation by up to eightfold without affecting timing performance. Additionally, low‐temperature atmospheric treatments reversibly modify the cerium oxidation state, revealing strong defect sensitivity and offering new strategies to optimize ...
Pavlo Mai +11 more
wiley +1 more source
Comparison of four different algorithms for the calculation of radioimmunoassay standard curves [PDF]
, 1980 Peer ...
Herndl, R. +2 more
core +2 more sources
Advanced Robotics Research, EarlyView.This article presents dielectric elastomer switch (DES) materials, based on composite thin films. Alignment of graphite flakes due to their physical confinement within the thin films lead to much stronger piezoresistive responses than bulk composites, while their durability exceeds that of conventional liquid‐based DES materials.
Lingyu Liu +3 more
wiley +1 more source
Deprotonative C(sp3)/C(sp2)–H (Multi)Silylation of (Hetero)Arenes Mediated by NaTMP
Angewandte Chemie, EarlyView.An operationally simple protocol using a strongly basic sodium amide in combination with sterically emcumbered silicon electrophiles enables the deprotonative C–H (multi)silylation of a myriad of (hetero)arenes. Mechanistic investigations highlight the pivotal role of steric and coordination effects in controlling the regioselectivity and efficiency of
David Sánchez‐Roa +6 more
wiley +2 more sources
New Institute of Chemistry and Biotechnology ICB at ZHW
CHIMIA, 2004 The recently founded Institute of Chemistry and Biotechnology ICB of the Zurich University of Applied Sciences, Winterthur, (ZHW) is the common platform for all R&D as well as service activities of the Abteilung für Chemie und Biologische Chemie
Bernhard Sonnleitner +2 more
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A Soft Robotic Fish With a Dielectric Elastomer Actuator Body and Negative Stiffness Spine
Advanced Robotics Research, EarlyView.This work introduces a bio‐mimetic soft robotic fish driven by fiber‐reinforced dielectric elastomer actuators integrated as its body. By prestretching this active skin against a flexible spine, a negative stiffness system is created, enabling large‐amplitude bending.
Markus Koenigsdorff +4 more
wiley +1 more source