Results 51 to 60 of about 4,552 (133)
Students’ associations with the STEM acronym and their impact on value beliefs and STEM choices
Annals of the New York Academy of Sciences, Volume 1552, Issue 1, Page 297-313, October 2025.The perceived meaning of the acronym STEM (science, technology, engineering, mathematics) affected value beliefs and school career decisions for STEM. Associations of the STEM acronym with mathematics increased cost beliefs, which in turn decreased decisions for STEM careers.
Heidrun Stoeger +2 more
wiley +1 more source
Angewandte Chemie, Volume 137, Issue 40, September 26, 2025.Die ultramikroporösen Poren von TUB41 beherbergen selektiv Wasser‐ und CO2‐Moleküle in unterschiedlichen hydrophilen und hydrophoben Bereichen, ohne dabei in Konkurrenz zu treten. Zusammenfassung In dieser Arbeit berichten wir über die thermische und chemische Stabilität und das Gasadsorptionsverhalten des Gemischtliganden‐Phosphonat‐MOFs (Metal ...
Robert Oestreich +8 more
wiley +1 more source
Crystal structures of titanium–aluminium and –gallium complexes bearing two μ2-CH3 units
Acta Crystallographica Section E: Crystallographic Communications, 2017 The isotypic crystal structures of two titanocene complexes containing an EMe3 unit (E = Al, Ga; Me = methyl) with two μ2-coordinating methyl groups, namely [μ-1(η5)-(adamantan-1-yl-2κC1)cycylopentadienyl]di-μ2-methyl-methyl-2κC-[1(η5 ...
Tim Oswald +4 more
doaj +1 more source
Du rapport des sciences de la nature à l’ensemble de la science
Philosophia ScientiæSpeech given by Helmholtz in 1862 on the occasion of his appointment as Pro-Rector of the University of Heidelberg. The original reference text is: Hermann von Helmholtz, “Über das Verhältnis der Naturwissenschaften zur Gesammtheit der Wissenschaft ...
Hermann von Helmholtz
doaj +1 more source
Crystal structure of 3-{1′-[3,5-bis(trifluoromethyl)phenyl]ferrocenyl}-4-bromothiophene
Acta Crystallographica Section E, 2014 The molecular structure of the title compound, [Fe(C9H6BrS)(C13H7F6)], consists of a ferrocene backbone with a bis(trifluoromethyl)phenyl group at one cyclopentadienyl ring and a thiophene heterocycle at the other cyclopentadienyl ring.
Elisabeth A. Poppitz +2 more
doaj +1 more source
Direct Synthesis of C-Substituted [RC(O)CH2-CB11H11]− Carborate Anions
InorganicsA new synthetic method for the synthesis of C-substituted [RC(O)CH2-CB11H11]− carborate anions has been developed. The reaction of [closo-B11H11]2− with terminal alkynes in the presence of a copper catalyst leads to insertion into the boron cluster, and ...
Vanessa C. Barra +4 more
doaj +1 more source
Main Group Metal Chemistry, 2017 The organogermane GeH2Cp*2 (1) was synthesized by the reaction of GeCl2Cp*2 (A) with LiAlH4 in quantitative yield, whereas the synthesis of the previously reported compounds SiCl2Cp*2 (B), SnCl2Cp*2 (C), SiClHCp*2 (D) and SiH2Cp*2 (E) followed ...
Fritzsche Ronny +3 more
doaj +1 more source
Beiträge zur Lehrerinnen- und Lehrerbildung, 2016 Seit der Freigabe des Lehrplans 21 gibt das neue Integrationsfach «Räume, Zeiten, Gesellschaften» (RZG) viel zu reden. Anders als im Bereich «Natur und Technik» (NT), das drei Naturwissenschaften vereint, prallen bei RZG naturwissenschaftliche ...
Rolf Bürki +4 more
doaj +1 more source
Crystal structure of ruthenocenecarbonitrile
Acta Crystallographica Section E: Crystallographic Communications, 2015 The molecular structure of ruthenocenecarbonitrile, [Ru(η5-C5H4C[triple-bond]N)(η5-C5H5)], exhibits point group symmetry m, with the mirror plane bisecting the molecule through the C[triple-bond]N substituent.
Frank Strehler +2 more
doaj +1 more source
Evolutionary history of sex and accessory chromosomes in hornworts
New Phytologist, Volume 248, Issue 1, Page 24-31, October 2025.
John L. Bowman, Jonathan Levins
wiley +1 more source