Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Matthias von Arx"'
Autor:
Matthias von Arx, Peter Labudde
Publikováno v:
CHIMIA, Vol 66, Iss 11 (2012)
Triggered by an increasing consensus on the importance of science education for the economy and society as a whole, in recent years, a growing number of educational programs, initiatives and projects have been launched by various players (from educat
Externí odkaz:
https://doaj.org/article/e7f1fc2aae514d98840efc44c4e6b90a
Autor:
Matthias von Arx, Anne Beerenwinkel
Publikováno v:
Research in Science Education. 47:237-255
For the last three decades, moderate constructivism has become an increasingly prominent perspective in science education. Researchers have defined characteristics of constructivist-oriented science classrooms, but the implementation of such science
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f95a044e630d6abc74ab6de0b985289
https://doi.org/10.1007/s11165-015-9497-3
https://doi.org/10.1007/s11165-015-9497-3
Autor:
Sascha Bernholt, Matthias von Arx
Publikováno v:
Perspectives in Science, Vol 5, Iss C, Pp 36-44 (2015)
In den letzten Jahren sind in vielen Ländern Kompetenzmodelle entwickelt worden, welche als Referenzsysteme für die Festlegung und Überprüfung von Bildungsstandards dienen. In vielen Fällen bleibt es jedoch eine offene Frage, wie spezifische Kom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95f4aebef7b3cdcf215e923046039142
https://doi.org/10.1016/j.pisc.2015.07.001
https://doi.org/10.1016/j.pisc.2015.07.001
Publikováno v:
The Journal of Physical Chemistry B. 110:21777-21782
The adsorption of cinchonidine (CD) and cinchonine (CN) on Pt(111) and Pd(111) single crystals has been investigated by means of scanning tunneling microscopy (STM) in an ultrahigh vacuum system. In time-lapse series the mobilities of different adsor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cae8e24ce2816ee51e47751a611a69c0
https://doi.org/10.1021/jp0628941
https://doi.org/10.1021/jp0628941
Publikováno v:
Phys. Chem. Chem. Phys.. 7:273-277
The adsorption of cinchonidine (CD) on Pt(111) has been investigated by means of STM in the presence and absence of hydrogen. The time-resolved studies revealed that the mobility of adsorbed CD molecules depends on the hydrogen pressure. At low hydro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::783afceb0d506f490cdc693e03e6fcb7
https://doi.org/10.1039/b406668e
https://doi.org/10.1039/b406668e
Publikováno v:
Journal of Catalysis, Vol. 209, No 2 (2002) pp. 489-500
The relation between the electronic structure of α-substituted ketones and their reactivity in the racemic and enantioselective platinum-catalyzed hydrogenation has been investigated using a combined theoretical and experimental approach. A correlat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bb940cce7b71dcb6bf94fb3294d06fe
https://doi.org/10.1006/jcat.2002.3653
https://doi.org/10.1006/jcat.2002.3653
Publikováno v:
Tetrahedron: Asymmetry. 12:3089-3094
The hydrogenation of 2,2,2-trifluoroacetophenones with different aryl-substituents (CF 3 , N(Me) 2 and Me) has been studied over Pt/Al 2 O 3 modified by cinchonidine, its hydrochloride or O -methyl cinchonidine. Electron-withdrawing groups increased
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd1eb4fb08db6c415ed4d55acfb96539
https://doi.org/10.1016/s0957-4166(01)00524-9
https://doi.org/10.1016/s0957-4166(01)00524-9
Publikováno v:
Angewandte Chemie International Edition. 40:2302-2305
Two competing reaction pathways, which lead to opposite enantiomers, occur in the hydrogenation of 1 over chirally modified platinum, as revealed by catalytic and NMR spectroscopic experiments: the fast reduction of the ketoform 1 a (minor species) a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51846dfa8b74817f79ea94c04a807e58
https://doi.org/10.1002/1521-3773(20010618)40:12<2302::aid-anie2302>3.0.co
https://doi.org/10.1002/1521-3773(20010618)40:12<2302::aid-anie2302>3.0.co
Publikováno v:
Angewandte Chemie. 113:2369-2372
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8ce316aa64759381a33f883e60beeb4
https://doi.org/10.1002/1521-3757(20010618)113:12<2369::aid-ange2369>3.0.co
https://doi.org/10.1002/1521-3757(20010618)113:12<2369::aid-ange2369>3.0.co
Publikováno v:
ChemInform. 33
The hydrogenation of 2,2,2-trifluoroacetophenones with different aryl-substituents (CF 3 , N(Me) 2 and Me) has been studied over Pt/Al 2 O 3 modified by cinchonidine, its hydrochloride or O -methyl cinchonidine. Electron-withdrawing groups increased
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c5785c864366b3754092b3ce9cd4929
https://doi.org/10.1002/chin.200228041
https://doi.org/10.1002/chin.200228041