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Articles 1 - 10 of 10
Full-Text Articles in Science and Mathematics Education
Chemistry Student Attitudes And Utilization Of Office Hours, Dieng Barbacar, Edgar Gomez, Andre Rodriguez
Chemistry Student Attitudes And Utilization Of Office Hours, Dieng Barbacar, Edgar Gomez, Andre Rodriguez
Publications and Research
While research has demonstrated that faculty-student interactions increase retention and graduation rates, faculty often report that their office hours are underutilized. To better understand students’ attitudes, usage and plans towards faculty hours a survey was administered in the second to third week of the fall 2018 semester to students in 5 sections of general chemistry courses. The goal was to better understand how students perceive the benefits and hindrances of office hours, along with current or planned attendance. Prior to survey administration, it was speculated that not attending office hours could be because they were not scheduled at a convenient …
Adapting Cell-Free Protein Synthesis As A Platform Technology For Education, Grace W. Chu, Max Z. Levine, Nicole E. Gregorio, Javin P. Oza
Adapting Cell-Free Protein Synthesis As A Platform Technology For Education, Grace W. Chu, Max Z. Levine, Nicole E. Gregorio, Javin P. Oza
STAR Program Research Presentations
Cell-free protein synthesis (CFPS) has emerged as an enabling biotechnology for research and biomanufacturing as it allows for the production of protein without the need for a living cell. Applications of CFPS include the construction of libraries for functional genomics and structural biology, the production of personalized medicine, and the expression of virus-like particles. The absence of a cell wall provides an open platform for direct manipulation of the reaction conditions and biological machinery. This project focuses on adapting the CFPS biotechnology to the classroom, making a hands-on bioengineering approach to learning protein synthesis accessible to students grades K-16 through …
Safe Use Of Hydrogen Peroxide In The Organic Lab, Patrick Dussault
Safe Use Of Hydrogen Peroxide In The Organic Lab, Patrick Dussault
Organic Peroxides: Safety Issues
The article describes good practices for use of hydrogen peroxide (H2O2) in an organic lab setting. Major headings include:
Leading references; Toxicity; Physical properties; Chemical properties; Stability and incompatibilities; Confinement/pressure; and, References to accidents involving H2O2.
Alkene Ozonolysis In The Academic Lab, Patrick Dussault
Alkene Ozonolysis In The Academic Lab, Patrick Dussault
Organic Peroxides: Safety Issues
The following information is offered as a guide based upon our experience with application of ozone for organic oxidations and hydroperoxide synthesis. Please send suggestions, requests, or corrections to pdussault1@unl.edu.
Introduction and leading references
Overview of ozonolysis: Mechanism, Substrate reactivity, Typical reaction conditions, Reaction monitoring, Reaction work-ups
Safety Issues
Acknowledgements:
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The following provides a brief introduction to the application of ozonolysis within academic labs. Ozonolysis remains among the most frequently used of methods for oxidative cleavage of alkenes. While best known as a means by which to introduce aldehydes and ketones, ozonolysis can also be used to generate other …
Working With Organic Peroxides In The Academic Lab, Patrick Dussault
Working With Organic Peroxides In The Academic Lab, Patrick Dussault
Organic Peroxides: Safety Issues
ABSTRACT: The following is a brief introduction to peroxide safety from the viewpoint of a synthetic chemist. Major topics include: classes of organic peroxides; peroxide reactivity; hazard identification and minimization; reaction monitoring; and, hazards associated with auto-oxidation of peroxidizable solvents.
KEYWORDS: peroxide, hydroperoxide, hydroperoxyacetal, ozonide, perester, dihydroperoxide, monoperoxyacetal, active oxygen, peroxide strips, TLC indicator, self-accelerating decomposition, radical, exothermicity, transition metals.
CONTENTS: 1. Literature resources 2. Major classes of peroxides 3. Basis for peroxide reactivity 4. Determining reactivity and minimizing hazards a. Steps to take before an experiment b. Minimizing hazard during reactions c. Monitoring reactions d. Working with isolated peroxides …
Moving Beyond Alpha: A Primer On Alternative Sources Of Single-Administration Reliability Evidence For Quantitative Chemistry Education Research, Regis Komperda, Thomas C. Pentecost, Jack Barbera
Moving Beyond Alpha: A Primer On Alternative Sources Of Single-Administration Reliability Evidence For Quantitative Chemistry Education Research, Regis Komperda, Thomas C. Pentecost, Jack Barbera
Chemistry Faculty Publications and Presentations
This methodological paper examines current conceptions of reliability in chemistry education research (CER) and provides recommendations for moving beyond the current reliance on reporting coefficient alpha (α) as reliability evidence without regard to its appropriateness for the research context. To help foster a better understanding of reliability and the assumptions that underlie reliability coefficients, reliability is first described from a conceptual framework, drawing on examples from measurement in the physical sciences; then classical test theory is used to frame a discussion of how reliability evidence for psychometric measurements is commonly examined in CER, primarily in the form of single-administration reliability …
Using Quenching To Detect Corrosion On Sculptural Metalwork: A Real-World Application Of Fluorescence Spectroscopy, Cory Hensen, Tami Lasseter Clare, Jack Barbera
Using Quenching To Detect Corrosion On Sculptural Metalwork: A Real-World Application Of Fluorescence Spectroscopy, Cory Hensen, Tami Lasseter Clare, Jack Barbera
Chemistry Faculty Publications and Presentations
Fluorescence spectroscopy experiments are a frequently taught as part of upper-division teaching laboratories. To expose undergraduate students to an applied fluorescence technique, a corrosion detection method, using quenching, was adapted from authentic research for an instrumental analysis laboratory. In the experiment, students acquire fluorescence spectra of sensing molecules in the presence of mock sculpture samples and discuss the condition of the sculptures based on the levels of soluble iron detected. This real-world-based experiment allows students the chance to engage with ongoing research and further understand the challenges with early detection of corrosion. Most students successfully completed the experiment, wrote a …
Concentration, Amount And Counting By Weighing, Julian Tyson
Concentration, Amount And Counting By Weighing, Julian Tyson
Science and Engineering Saturday Seminars
Concentration, Amount and Counting by Weighing
UMass Amherst STEM Ed Institute Saturday Workshop 2/3/2018
Julian Tyson, Professor Emeritus, Department of Chemistry. Tyson@chem.umass.edu
Session 1. Introductions.
Ice-breaker: The elementarity contest.
Setting the scene: “How much arsenic do we eat?” Why do we want to know? The Consumer Reports articles (Nov 2012 and Nov 2014)
Dealing with really big and really small numbers.
Session 2. Amount, concentration
Solids, liquids and gases. The “parts per” concept.
Session 3. Counting by weighing
The count equation. Rice grains (the bottle content problem), atoms and molecules.. Chemical formulas and balanced chemical expressions. The numbers in the …
Chemists Atwitter, Raychelle Burks, Stephani Page, Kiyomi D. Deards, Joan Barnes
Chemists Atwitter, Raychelle Burks, Stephani Page, Kiyomi D. Deards, Joan Barnes
UNL Libraries: Faculty Publications
Twitter can be used to promote chemists, their work, and their events to other scientists and the general public. From checklists to timelines; how to use Twitter successfully as an individual or institution is discussed. This chapter includes: examples of how the authors have used Twitter, how to find and use common subject tags, tags most used when Tweeting about chemistry and science, and a discussion about measuring success. Knowing when and how to Tweet will help chemists communicate successfully with their peers and the general public in 280 characters or less.
Evaluation Of The Influence Of Wording Changes And Course Type On Motivation Instrument Functioning In Chemistry, Regis Komperda, Kathryn N. Hosbein, Jack Barbera
Evaluation Of The Influence Of Wording Changes And Course Type On Motivation Instrument Functioning In Chemistry, Regis Komperda, Kathryn N. Hosbein, Jack Barbera
Chemistry Faculty Publications and Presentations
Increased understanding of the importance of the affective domain in chemistry education research has led to the development and adaptation of instruments to measure chemistry-specific affective traits, including motivation. Many of these instruments are adapted from other fields by using the word ‘chemistry’ in place of other disciplines or more general ‘science’ wording. Psychometric evidence is then provided for the functioning of the new adapted instrument. When an instrument is adapted from general language to specific (e.g. replacing ‘science’ with ‘chemistry’), an opportunity exists to compare the functioning of the original instrument in the same context as the adapted instrument. …