Chemistry

Preparation and Characterization of a Monolithic Column for use in HPLC: An Undergraduate Laboratory Experiment

The high-performance liquid chromatography (HPLC) experiment, most often done in the undergraduate analytical instrumentation laboratory course, generally illustrates reversed-phase chromatography using a commercial C18 silica column. To avoid the expense of periodic column replacement and introduce a choice of columns with different stationary phases, we have developed an experiment in which students prepare and test a polymer-based monolithic column. The 10 or 15 cm monolithic column is prepared using 1/8 in. o.d. × 2.3 mm i.d. poly(ether ether ketone) or PEEK tubing.

Author/Presenter: 
Bindis, Michael P
Bretz, Stacey Lowery
Year: 
2011

Generating Cognitive Dissonance in Student Interviews through Multiple Representations

 

Author/Presenter: 
Linenberger, Kimberly
Bretz, Stacey Lowery
Year: 
2012
Short Description: 
This study explores what students understand about enzyme–substrate interactions, using multiple representations of the phenomenon. In this paper we describe our use of the 3 Phase-Single Interview Technique with multiple representations to generate cognitive dissonance within students in order to uncover misconceptions of enzyme–substrate interactions. Findings from 25 student interviews are interpreted through the lens of multiple theoretical frameworks, including personal constructivism and coherence formation. The importance of classroom teachers engaging students in dialogue about representations is discussed.

Chemistry Education Research Doctoral Scholars Program (Bretz, Lewis, Mayberry)

Author/Presenter: 
Stacey Lowery Bretz
Jennifer Lewis
Maralee Mayberry
Year: 
2009
Short Description: 
The Chemistry Education Research Doctoral Scholars Program aims to recruit, train and graduate a diverse group of scholars in chemistry education research (CER) who specialize in assessment; design coursework, K-12 partnerships, research experiences, and mentoring to successfully prepare these scholars for careers in CER; and create a community of scholars to collaborate and systematically improve assessment of student learning.

A Symmetry POGIL Activity for Inorganic Chemistry

The goal of this project was to create an inquiry activity to teach symmetry elements and symmetry operations in an inorganic chemistry course. Many students experience difficulty when building and mentally manipulating three-dimensional mental models from two-dimensional images, causing difficulty when learning symmetry. Process-oriented, guided-inquiry learning (POGIL) was used to structure the activity using a learning cycle paradigm consistent with research on how students learn as described by Novak’s human constructivism theory.

Author/Presenter: 
Luxford, Cynthia
Crowder, Michael
Bretz, Stacey Lowery
Year: 
2012

Generating Cognitive Dissonance in Student Interviews through Multiple Representations

Author(s): 
Linenberger, Kimberly
Bretz, Stacey Lowery
Contact Info: 
Publication Type: 
Journal
Year: 
2012
In press?: 
In Press
Resource Format: 

This study explores what students understand about enzyme–substrate interactions, using multiple representations of the phenomenon. In this paper we describe our use of the 3 Phase-Single Interview Technique with multiple representations to generate cognitive dissonance within students in order to uncover misconceptions of enzyme–substrate interactions.

A Symmetry POGIL Activity for Inorganic Chemistry

Author(s): 
Luxford, Cynthia
Crowder, Michael
Bretz, Stacey Lowery
Contact Info: 
Publication Type: 
Journal
Year: 
2012
Month: 
February
In press?: 
In Press
Resource Format: 

The goal of this project was to create an inquiry activity to teach symmetry elements and symmetry operations in an inorganic chemistry course. Many students experience difficulty when building and mentally manipulating three-dimensional mental models from two-dimensional images, causing difficulty when learning symmetry. Process-oriented, guided-inquiry learning (POGIL) was used to structure the activity using a learning cycle paradigm consistent with research on how students learn as described by Novak’s human constructivism theory.

Synthesis and Characterization of Self-Assembled Liquid Crystals: p-Alokxybenzoic Acids

Author(s): 
Jensen, Jana
Grundy, Stephan
Bretz, Stacey Lowery
Hartley, C. Scott
Publication Type: 
Journal
Year: 
2011
Month: 
August
In press?: 
In Press
Resource Format: 

Thermotropic liquid crystal phases are ordered fluids found, for some molecules, at intermediate temperatures between the crystal and liquid states. Although technologically important, these materials typically receive little attention in the undergraduate curriculum. Here, we describe a laboratory activity for introductory organic chemistry students on the synthesis and characterization of the p-alkoxybenzoic acids.

Preparation and Characterization of a Monolithic Column for use in HPLC: An Undergraduate Laboratory Experiment

Author(s): 
Bindis, Michael P
Bretz, Stacey Lowery
Contact Info: 
Publication Type: 
Journal
Year: 
2011
Month: 
May
In press?: 
In Press
Resource Format: 

The high-performance liquid chromatography (HPLC) experiment, most often done in the undergraduate analytical instrumentation laboratory course, generally illustrates reversed-phase chromatography using a commercial C18 silica column.

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