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2001

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Chemistry

Articles 1 - 10 of 10

Full-Text Articles in Physical Sciences and Mathematics

Automated, Web-Based, Second-Chance Homework, Randall W. Hall, Leslie G. Butler, Saundra Y. Mcguire, Sean P. Mcglynn, Gary L. Lyon, Ron L. Reese, Patrick A. Limbach Nov 2001

Automated, Web-Based, Second-Chance Homework, Randall W. Hall, Leslie G. Butler, Saundra Y. Mcguire, Sean P. Mcglynn, Gary L. Lyon, Ron L. Reese, Patrick A. Limbach

Randall W. Hall

Procedures and programs for Web-based homework administration were developed and tested. The special feature of the protocol is the option of a "second chance". When a student gives a wrong answer in the weekly homework assignment, a second version of the same question is posed to that student within 48 hours. Both the original and the second versions of the homework are Web-based and automatically graded. More than 90% of the students used the second chance at least once during the semester. More than 60% used this feature for every homework assignment. The second-chance option motivates students to study the …

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Teaching Analytical Chemistry To The Masses: How We Went From 2 Courses To 7 Courses In 10 Years, Gary Long, Mark Anderson, Brian Tissue, John Morris Oct 2001

Teaching Analytical Chemistry To The Masses: How We Went From 2 Courses To 7 Courses In 10 Years, Gary Long, Mark Anderson, Brian Tissue, John Morris

Mark R. Anderson

No abstract is currently available.

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Interactive Multimedia Over The Internet For Teaching Analytical Chemistry, Mark Anderson Oct 2001

Interactive Multimedia Over The Internet For Teaching Analytical Chemistry, Mark Anderson

Mark R. Anderson

No abstract is currently available.

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Opportunities In Computational Materials Science, Randall Hall, Juana Moreno Sep 2001

Opportunities In Computational Materials Science, Randall Hall, Juana Moreno

Randall W. Hall

The White House Materials Genome Initiative intends to double the speed with which we discover, develop, and manufacture new materials. In order for this initiative to be successful an unprecedented collaboration between computer scientists, applied mathematicians, computational scientists, and engineers with expertise in each of the aspects of the simulation-guided design of modern materials must be established. We must also take advantage of the enormous national investments in the next generation of hyperparallel, heterogeneous, multicore supercomputers to develop experimentally verified algorithms. In this talk I will describe new collaborative efforts in Louisiana towards developing a State-wise team of scientist to …

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Live Demonstration Of The Personal Response System: A Tool For Prying Classroom Feedback From Students, Thomas Goyne May 2001

Live Demonstration Of The Personal Response System: A Tool For Prying Classroom Feedback From Students, Thomas Goyne

Thomas Goyne

No abstract provided.

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A Biochemistry Laboratory Course Which Provides A 'Taste Of Research, Thomas Goyne May 2001

A Biochemistry Laboratory Course Which Provides A 'Taste Of Research, Thomas Goyne

Thomas Goyne

No abstract provided.

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Spectra And Geometries Of Ar+ N (N = 30 - 60) [Invited], Jose Gascon, Randall W. Hall May 2001

Spectra And Geometries Of Ar+ N (N = 30 - 60) [Invited], Jose Gascon, Randall W. Hall

Randall W. Hall

We report finite temperature simulations of AR+n (N = 30−60) using a semiempirical model Hamiltonian. We calculate the photoabsorption spectra and analyze the charge distribution in both ground and excited states. The maximum photoabsorption wavelength for this set of clusters is in good agreement with experimental data. We analyze the average position of the atoms and the finite temperature distribution of the positive charge over the cluster. We find the charge localized on three atoms in the ground state and over the first two solvation spheres in the excited states. The extent of delocalization in the excited states can be …

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Using Flash Animation And Streaming Video For Laboratory/Lecture Demonstrations In Large Enrollment Courses, Mark Anderson Dec 2000

Using Flash Animation And Streaming Video For Laboratory/Lecture Demonstrations In Large Enrollment Courses, Mark Anderson

Mark R. Anderson

No abstract is currently available.

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Metal Binding Studies With Macrocyclic Hexathioethers: Transition Metal Complexes Of 22s6 And 20s6”,, Gregory Grant, Christopher Brandow, Chrystal Bruce, Mark Brandt, Rebecca Kirk, Sabrina Lee, Kerry Robinson, Larry Mehne Dec 2000

Metal Binding Studies With Macrocyclic Hexathioethers: Transition Metal Complexes Of 22s6 And 20s6”,, Gregory Grant, Christopher Brandow, Chrystal Bruce, Mark Brandt, Rebecca Kirk, Sabrina Lee, Kerry Robinson, Larry Mehne

Chrystal D. Bruce

No abstract provided.

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Structural Characterization Of Mao And Related Aluminum Complexes. 1. Solid-State 27al Nmr With Comparison To Efg Tensors From Ab Initio Molecular Orbital Calculations, Pamela L. Bryant, Chris R. Harwell, Anthony A. Mrse, Earl F. Emery, Zhehong Gan, Tod Caldwell, Arneil P. Reyes, Philip Kuhns, David W. Hoyt, Larry S. Simeral, Randall W. Hall, Leslie G. Butler Dec 2000

Structural Characterization Of Mao And Related Aluminum Complexes. 1. Solid-State 27al Nmr With Comparison To Efg Tensors From Ab Initio Molecular Orbital Calculations, Pamela L. Bryant, Chris R. Harwell, Anthony A. Mrse, Earl F. Emery, Zhehong Gan, Tod Caldwell, Arneil P. Reyes, Philip Kuhns, David W. Hoyt, Larry S. Simeral, Randall W. Hall, Leslie G. Butler

Randall W. Hall

Experimental and ab initio molecular orbital techniques are developed for study of aluminum species with large quadrupole coupling constants to test structural models for methylaluminoxanes (MAO). The techniques are applied to nitrogen- and oxygen-containing complexes of aluminum and to solid MAO isolated from active commercial MAO preparations. (Aminato)- and (propanolato)aluminum clusters with 3-, 4-, and 6-coordinate aluminum sites are studied with three 27Al NMR techniques optimized for large 27Al quadrupole coupling constants:  field-swept, frequency-stepped, and high-field MAS NMR. Four-membered (aminato)aluminum complexes with AlN4 coordination yield slightly smaller Cq values than similar AlN2C2 sites:  12.2 vs 15.8 MHz. Planar 3-coordinate AlN2C …

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