Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Cynthia B. Powell"'
Autor:
Anton V. Dubrovskiy, Susan Broadway, Rebecca Weber, Diana Mason, Ben Jang, Blain Mamiya, Cynthia B. Powell, G. Robert Shelton, Deborah Rush Walker, Vickie M. Williamson, Adrian Villalta-Cerdas
Publikováno v:
Journal of Research in Science, Mathematics and Technology Education, Vol 5, Iss 1, Pp 47-68 (2022)
The Networking for Science Advancement (NSA) team's institutions consist of nine universities located in one large southwestern US state. This study evaluated students enrolled from Spring 2017 to Fall 2019 in firstand second-semester general chemist
Externí odkaz:
https://doaj.org/article/e3650b07956742e88eefa905e55e0c2a
Publikováno v:
IUCrData, Vol 5, Iss 9, p x201204 (2020)
The title complex, [{Os2(CO)4(C21H21P)2}2(C12H14O4)2], is a centrosymmetric molecular loop consisting of two Os—Os sawhorse units linked by two adamantane dicarboxylato bridges. It was synthesized by the microwave-mediated reaction between Os3(CO)1
Externí odkaz:
https://doaj.org/article/8c781d1945054045bb64be9c3e7cfa68
Publikováno v:
IUCrData, Vol 5, Iss 7, p x200897 (2020)
The title compound, C16H14FNO3, was synthesized via solid phase methods; it exhibits monoclinic (P21) symmetry at room temperature. The two independent molecules that comprise the asymmetric unit display distinct torsion angles of 173.2 (2) and 72.6
Externí odkaz:
https://doaj.org/article/6409c9845920483e8c2ca120c73dfbff
Autor:
Erin F. Rutledge, Kylie M. Wilson, Stephanie M. Martin, John W. Swartout, Ashley K. Archambeau, Emily R. Mikeska, Gregory L. Powell, Eric W. Reinheimer, Cynthia B. Powell
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 74, Iss 9, Pp 1235-1238 (2018)
In the title complex C34H20O6Os2 or (μ-η4-C4Ph4)Os2(CO)6, one Os atom is part of a metallacyclopentadiene ring, while the second Os atom is π-bonded to the organic portion of this ring. The distance of 2.7494 (2) Å between the two Os atoms is typ
Externí odkaz:
https://doaj.org/article/415068b0d9074ce1a71a289d14e146a1
Publikováno v:
IUCrData, Vol 4, Iss 10, p x191386 (2019)
The title complex, [Os3(C2H4N)H(CO)10] or [Os3(CO)10(μ-H)(μ-HN=C—CH3-1κN:2κC)], was synthesized in 41.6% yield by reactions between Os3(CO)11(CH3CN) and 2,4,6-trimethylhexahydro-1,3,5-triazine. The central osmium triangle has two OsI atoms brid
Externí odkaz:
https://doaj.org/article/e91ed40eaf00469a91daa025b6fcc446
Autor:
Blain Mamiya, Vickie Williamson, Cynthia B. Powell, Ben Jang, Rebecca Weber, Diana Mason, Susan Broadway, G. Robert Shelton, Anton Dubrovskiy, Adrian Villalta-Cerdas, Deborah Rush Walker
Publikováno v:
Journal of Research in Science, Mathematics and Technology Education. 5:47-68
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ece784e9a15a59d0c3b819011df9a0b0
https://doi.org/10.31756/jrsmte.512
https://doi.org/10.31756/jrsmte.512
Autor:
Ben Jang, Adrian Villalta-Cerdas, Anton V. Dubrovskiy, Rebecca Weber, Deborah Rush Walker, Diana S. Mason, Cynthia B. Powell, Blain Mamiya, G. Robert Shelton
Publikováno v:
Journal of Chemical Education. 98:3061-3072
The Math-Up Skills Tests (MUST) has been used in multiple research projects conducted by the Networking for Science Advancement (NSA) team to determine how automaticity skills (what can be done without a calculator) in arithmetic can be used to predi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2dcd5e2f67f4ce8e6a3c22f4049b1976
https://doi.org/10.1021/acs.jchemed.1c00714
https://doi.org/10.1021/acs.jchemed.1c00714
Publikováno v:
Journal of Chemical Crystallography. 51:457-464
Four osmium carbonyl complexes were synthesized via microwave heating by reacting either Os3(CO)12 or Os3(CO)10( $$\mu$$ -dppm) with dppe, where dppm = bis(diphenylphosphino)methane and dppe = 1,2-bis(diphenylphosphino)ethane. Two of the complexes, O
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4914265cb7be983242258b120ad3f8a
https://doi.org/10.1007/s10870-020-00869-8
https://doi.org/10.1007/s10870-020-00869-8
Autor:
Ben Jang, Diana S. Mason, G. Robert Shelton, Anton V. Dubrovskiy, Cynthia B. Powell, Deborah Rush Walker, Joseph M. Simpson, Vickie M. Williamson
Publikováno v:
Chemistry Education Research and Practice. 21:1028-1041
Completion of a first-semester chemistry (Chem I) course lays the foundation for understanding second-semester chemistry (Chem II) topics. The purpose of this study is to evaluate the influence of basic arithmetic skills on students’ Chem II succes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acc200c6fc23407b7cf52ec6b254ecf1
https://doi.org/10.1039/d0rp00006j
https://doi.org/10.1039/d0rp00006j
Autor:
Diana S. Mason, Deborah Rush Walker, Vickie M. Williamson, G. Robert Shelton, Cynthia B. Powell, Alan R. Dabney, Rebecca Weber, Blain Mamiya, Susan Broadway, Eric Chuu
Publikováno v:
Chemistry Education Research and Practice. 21:51-61
First-semester general chemistry is a known “gatekeeper” course due to its high failure rate. These higher education courses are taken by students who for the most part are regularly admitted freshmen, yet many struggle to succeed. In this invest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f28a2e0f254e52df6659898004192bc5
https://doi.org/10.1039/c9rp00077a
https://doi.org/10.1039/c9rp00077a