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Omer Faruk Bicer; Rana Lomlu; Fatmagul Katmer; Sefik Su¨zer – Journal of Chemical Education, 2023
Vibrational fine structure observed in the published He-I UV photoelectron spectra of H[subscript 2] and N[subscript 2] molecules recorded at room temperature and under microwave excitation or at 700 °C have been reexamined and compared with calculations of the Franck-Condon factors (FCFs) using simple harmonic oscillator wave functions and/or…
Descriptors: Science Education, Spectroscopy, Visual Aids, Chemistry
Gregorio Cruz Villalon – Journal of Chemical Education, 2023
A Spreadsheet Excel application for chromatographic peak characterization is described in this article. Data are exported from HPLC specific program to an Excel file with macros to perform basic calculations as retention time, height, and area of the peaks. From these values, peak resolution, asymmetry, or theoretical plates are calculated and…
Descriptors: Science Education, Visual Aids, Data, Spreadsheets
Choirun Nisaa Rangkuti; Suci Faniandari; A. Suparmi; Yanoar Pribadi Sarwono – Journal of Chemical Education, 2024
As a widely applied theory that has found success across many fields, density functional theory (DFT) is largely taught. Typically, the most effective way to convey DFT concepts is through illustrative examples that are currently lacking in available resources. In this work, we demonstrate total energy calculations for H[subscript 2] using…
Descriptors: Scientific Concepts, Molecular Structure, Science Education, Chemistry
Vero´nica Garci´a Rojas; Jhon Fredy Pe´rez Torres – Journal of Chemical Education, 2023
Auxiliary Tanabe-Sugano diagrams are presented. They enable a rapid and reliable graphical derivation of Dq/B and C/B crystal field parameter ratios from spectroscopic data. Using these values, one can calculate Dq and B by employing the original Tanabe-Sugano diagrams. Subsequently, C can also be calculated irrespective of the value C/B fixed in…
Descriptors: Metallurgy, Visual Aids, Science Education, Energy
Irsa Abbasi; Shahzad Rasool; Uzma Habib – Journal of Chemical Education, 2023
Self-study is an integral part of chemistry learning, whereby the students consume knowledge outside of the classroom environment. The COVID-19 pandemic magnified the need for efficient methods of synchronous and asynchronous instructional content delivery worldwide. Virtual reality (VR) presents a prospective technological solution to aid…
Descriptors: Computer Simulation, Visual Aids, Distance Education, Asynchronous Communication
Endler Marcel Borges – Journal of Chemical Education, 2023
In this activity, students observe chemical and physical properties of elements using an online periodic table, where these properties were shown numerically and by colors. Then the elements were divided into metals, nonmetals, and metalloids, and their periodic properties were visualized using statistical concepts such as normality, kurtosis,…
Descriptors: Data Analysis, Visual Aids, Chemistry, Science Activities
Daniel F. McCain; Evelyn K. McCain – Journal of Chemical Education, 2024
The following activity was developed to allow students to actively participate in and measure the kinetics of a multistep process. Each group of students is given a stack of blank coloring pages, each with a rainbow design printed on it. Each student in a group is given a different color crayon and colors in their portion of the picture before…
Descriptors: Kinetics, Color, Visual Aids, Chemistry
Curnow, Owen J. – Journal of Chemical Education, 2021
A simple method to determine Lewis electron dot structures and formal charges without a need to sum all of the valence electrons, reorganize electron pairs, draw and pair up individual electrons, or remember a formal charge formula is described. The formal charge is determined by the group number (number of valence electrons) and the number of…
Descriptors: Visual Aids, Methods, Chemistry, Science Instruction
Chiwook Park – Journal of Chemical Education, 2022
"k[subscript cat]/K[subscript M]" is a fundamental kinetic parameter as important as "k[subscript cat]" in enzyme kinetics. Although the parameter provides critical information on how the enzyme lowers the energy barriers along the reaction pathway for catalysis, "k[subscript cat]/K[subscript M]" is frequently…
Descriptors: Science Instruction, Kinetics, Energy, Scientific Concepts
Monika Skowron; Sylwia Smarzewska – Journal of Chemical Education, 2024
A new undergraduate thin-layer chromatography laboratory experiment devoted to quantitative determination of disulfiram in Anticol formulation is presented. The proposed activity can be a part of a chromatographic methods of analysis course as well as a general chemistry course. To carry out a quantitative analysis, an image analysis technique was…
Descriptors: Undergraduate Study, Chemistry, Science Education, College Science
Guangjie Yan; Yuteng Zhang; Alexis Allamprese; Kameron N. Brooks; Wenkai Chen; Shudan Yan; Tai-Yen Chen – Journal of Chemical Education, 2024
Single-molecule localization microscopy (SMLM) has revolutionized our ability to visualize cellular structures, offering unprecedented detail. However, the intricate biophysical principles that underlie SMLM can be daunting for newcomers, particularly undergraduate and graduate students. To address this challenge, we introduce the fundamental…
Descriptors: Molecular Structure, Chemistry, Science Instruction, Laboratory Equipment
Kylie Light; Jordan Brooks; Yun-Seok Choi – Journal of Chemical Education, 2023
Sanger sequencing, also known as dideoxy sequencing, is a widely used method for DNA sequencing, particularly for cloned plasmids and clinical samples. This technique requires a combination of essential biochemistry skills, such as a chain-termination reaction, gel electrophoresis, and fluorescence detection. Unfortunately, there is a lack of…
Descriptors: Genetics, Biochemistry, Science Instruction, Science Activities
Baudilio Coto; Inmaculada Sua´rez; Maria Jose´ Tenorio; Miguel Angel Gonza´lez – Journal of Chemical Education, 2023
The COVID-19 pandemic and its related restrictions forced the reorganization of learning methodology and gave a central role to remote learning. Laboratory experiments are the most affected activity, and several alternatives were described. This work proposes to create calculation tools by simply programming in Visual Basic of Excel to emulate the…
Descriptors: Laboratory Experiments, Computer Software, Computation, Visual Aids
Filgueiras, Matheus Fernandes; Borges, Endler Marcel – Journal of Chemical Education, 2022
Students quantified the protein content in beer, milk, powdered milk, and whey protein using the Bradford assay. The assay was carried out using absorbance measured at 595 nm (standard method) and 96-well-plate images (proposed method). They built analytical curves using bovine serum albumin (BSA) and casein and determined that protein type…
Descriptors: Chemistry, Color, Visual Aids, Science Instruction
Sarah N. Abdo; Jeremy L. Hsu; Constantine Kapetanakis; Dina L. Newman; L. Kate Wright; Jennifer Bailey – Journal of Chemical Education, 2024
Effective spatial visualization and reasoning skills are often credited for students' success in science and engineering courses. However, students enrolled in these science courses are not always exposed to or trained properly on the best ways to utilize models to aid in their learning. Improving spatial visualization techniques with 3D models,…
Descriptors: Models, Visual Aids, Concept Formation, Molecular Structure