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Journal Articles: 28 results
Kinetic Analysis of Amylase Using Quantitative Benedict's and Iodine Starch Reagents  Beverly Cochran, Deborah Lunday, and Frank Miskevich
This laboratory emphasizes that enzymes mediate the conversion of a substrate into a product and that either the concentration of product or reactant may be used to follow the course of a reaction. It does so by using an inexpensive scanner and open-source image analysis software to quantify amylase activity through the breakdown of starch and the appearance of glucose.
Cochran, Beverly; Lunday, Deborah; Miskevich, Frank. J. Chem. Educ. 2008, 85, 401.
Biosynthesis |
Carbohydrates |
Catalysis |
Enzymes |
Food Science |
Nutrition |
Quantitative Analysis |
UV-Vis Spectroscopy
Popcorn—What's in the Bag?  Marissa B. Sherman and Thomas A. Evans
Three independent activities explore microwave popcorn, the nature of the packaging, and the popcorn produced.
Sherman, Marissa B.; Evans, Thomas A. J. Chem. Educ. 2006, 83, 416A.
Carbohydrates |
Nutrition |
Physical Properties |
Solutions / Solvents |
Water / Water Chemistry
Chemical Bonding Makes a Difference!  Mary Harris
This report describes a PowerPoint presentation that shows how a small difference in bonding can result in a drastic change in the properties of a material.
Harris, Mary. J. Chem. Educ. 2006, 83, 1435.
Enrichment / Review Materials |
Materials Science |
Polymerization |
Carbohydrates
From "Greasy Chemistry" to "Macromolecule": Thoughts on the Historical Development of the Concept of a Macromolecule  Pedro J. Bernal
This paper presents a narrative about the historical development of the concept of a macromolecule. It does so to illustrate how the history of science might be used as a pedagogical tool to teach science, particularly to non-majors.
Bernal, Pedro J. J. Chem. Educ. 2006, 83, 870.
Colloids |
Nonmajor Courses |
Polymerization |
Molecular Properties / Structure |
Physical Properties
Popping Popcorn Kernels: Expanding Relevance with Linear Thinking  Jordan L. Bennett, Michael M. Fuson, and Thomas A. Evans
Graphing skills and an understanding of linear relationships are developed in the context of popping of individual popcorn kernels. Introductory-level chemistry students determine mass changes as the result of popping along with the volume and density of the popcorn flakes produced.
Bennett, Jordan L.; Fuson, Michael M.; Evans, Thomas A. J. Chem. Educ. 2006, 83, 414.
Carbohydrates |
Food Science |
Phases / Phase Transitions / Diagrams |
Physical Properties
The Chemistry of Popcorn: Polymers of Glucose  William F. Coleman
The Featured Molecules this month are all polymers of glucose and include cellobiose, maltose, 10-mer of cellulose, 40-mer of amylose, and an amylopectin fragment.
Coleman, William F. J. Chem. Educ. 2006, 83, 413.
Molecular Modeling |
Molecular Properties / Structure |
Carbohydrates
Brewing Science in the Chemistry Laboratory: A "Mashing" Investigation of Starch and Carbohydrates  Michael W. Pelter and Jennifer McQuade
This experiment is an investigation of the chemistry and processes involved in "mashing". Crushed malted barley is mixed with hot water and the progress of the enzymatic hydrolysis of starch is monitored using a simple iodine test.
Pelter, Michael W.; McQuade, Jennifer. J. Chem. Educ. 2005, 82, 1811.
Carbohydrates |
Enzymes |
Food Science |
Consumer Chemistry |
Nonmajor Courses
Quantitative Assay for Starch by Colorimetry Using a Desktop Scanner  Kurt R. Mathews, James D. Landmark, and Douglas F. Stickle
Here we describe a procedure to produce a standard curve for quantification of starch concentration using colorimetry.
Mathews, Kurt R.; Landmark, James D.; Stickle, Douglas F. J. Chem. Educ. 2004, 81, 702.
Separation Science |
Quantitative Analysis |
Carbohydrates |
Food Science |
Natural Products |
UV-Vis Spectroscopy |
Laboratory Computing / Interfacing |
Laboratory Equipment / Apparatus
The Other Double Helix--The Fascinating Chemistry of Starch  Robert D. Hancock and Bryon J. Tarbet
The chemistry of starch, particularly the structure of starch and starch granules.
Hancock, Robert D.; Tarbet, Bryon J. J. Chem. Educ. 2000, 77, 988.
Bioorganic Chemistry |
Carbohydrates |
Food Science |
Stereochemistry |
Applications of Chemistry |
Molecular Properties / Structure
Sugar Wordsearch  Terry L. Helser
Wordsearch puzzle containing 29 names, terms, prefixes and acronyms that describe sugars and their polymers.
Helser, Terry L. J. Chem. Educ. 2000, 77, 480.
Carbohydrates |
Nomenclature / Units / Symbols
Demonstration of Optical Rotatory Dispersion of Sucrose  S. M. Mahurin, R. N. Compton, and Richard N. Zare
A method for demonstrating and measuring the optical activity of chiral molecules in solution is described in which the rotation of linearly polarized light is directly observed at right angles to the propagation of light in the liquid.
Mahurin, S. M.; Compton, Robert N.; Zare, Richard N. J. Chem. Educ. 1999, 76, 1234.
Instrumental Methods |
Lasers |
Spectroscopy |
Carbohydrates
A Simple Method To Demonstrate the Enzymatic Production of Hydrogen from Sugar  Natalie Hershlag, Ian Hurley, and Jonathan Woodward
In the experimental protocol described here, it has been demonstrated that the common sugar glucose can be used to produce hydrogen using two enzymes, glucose dehydrogenase and hydrogenase. No sophisticated or expensive hydrogen detection equipment is required-only a redox dye, benzyl viologen, which turns purple when it is reduced. The color can be detected by a simple colorimeter.
Hershlag, Natalie; Hurley, Ian; Woodward, Jonathan. J. Chem. Educ. 1998, 75, 1270.
Enzymes |
Kinetics |
UV-Vis Spectroscopy |
Carbohydrates |
Applications of Chemistry
A Polymer "Pollution Solution" Classroom Activity  Terry L. Helser
An active classroom project testing the solubility of foam packing nuggets is described.
J. Chem. Educ. 1996, 73, 843.
Polymerization |
Alcohols
The Chemical Adventures of Sherlock Holmes: The Problem of Woolthshrap Prison  Thomas R. Rybolt and Thomas G. Waddell
A chemical mystery with an emphasis on scientific observation and the criminal use of a classic reaction of chemistry (iodine and starch).
Rybolt, Thomas R.; Waddell, Thomas G. J. Chem. Educ. 1995, 72, 1090.
Enrichment / Review Materials |
Carbohydrates
Carbohydrate Dehydration Demonstrations  David A. Dolson, Rubin Battino, Trevor M. Letcher, K. H. Pegel, and N. Revaprasadu
Study of the dehydration of a carbohydrate by sulfuric acid and variables that influence the reaction (including type of sugar, sugar granule size, and amount of water added to sugar).
Dolson, David A.; Battino, Rubin; Letcher, Trevor M.; Pegel, K. H.; Revprasadu, N. J. Chem. Educ. 1995, 72, 927.
Carbohydrates |
Reactions
A Handy Reagent for Testing the Reducing Power of Sugars  Sandell, Arvid
Using the reduction of copper(II) as a semi-quantitative test for reducing sugars.
Sandell, Arvid J. Chem. Educ. 1994, 71, 346.
Carbohydrates |
Oxidation / Reduction |
Coordination Compounds
Biodegradable films: Based on partially hydrolyzed corn starch or potato starch   Sommerfeld, Herbert; Blume, Rudiger
Demonstration of the promising developments in starch chemistry can be done with short and relevant classroom experiments.
Sommerfeld, Herbert; Blume, Rudiger J. Chem. Educ. 1992, 69, A151.
Carbohydrates |
Natural Products
New source for starch solutions: Biodegradable pellets  de Moura, John M.
Convenient way to prepare starch indicator for use in iodine titrations or in "clock" reactions.
de Moura, John M. J. Chem. Educ. 1992, 69, 860.
Carbohydrates |
Titration / Volumetric Analysis
Biochemistry laboratory for the freshman chemistry curriculum  Falk, Peter M.
Intended to introduce students to two important biochemical principles: the study of biomolecules and metabolism.
Falk, Peter M. J. Chem. Educ. 1989, 66, 944.
Metabolism |
Carbohydrates |
Lipids |
Proteins / Peptides |
Plant Chemistry
Chemistry of polymers, proteins, and nucleic acids: A short course on macromolecules for secondary schools  Lulav, Ilan; Samuel, David
Topics considered in a macromolecular chemistry unit for advanced high school chemistry students.
Lulav, Ilan; Samuel, David J. Chem. Educ. 1985, 62, 1075.
Polymerization |
Proteins / Peptides
Biochemistry off the shelf  Wilson, Jerry L.
Rather than using animal sources for biochemistry experiments, non-animal sources are inexpensive, readily available, and require no special storage.
Wilson, Jerry L. J. Chem. Educ. 1985, 62, 796.
Enzymes |
Carbohydrates |
Lipids |
Metabolism
The chemical composition of the cell  Holum, John R.
A broad outline of the chemical substances that occur in most cells.
Holum, John R. J. Chem. Educ. 1984, 61, 877.
Biological Cells |
Lipids |
Carbohydrates |
Proteins / Peptides
Nutrition (diet) and athletics  Lineback, David R.
Nutritional requirements of athletes, energy use for various activities, carbohydrate loading, and myths and fallacies.
Lineback, David R. J. Chem. Educ. 1984, 61, 536.
Nutrition |
Bioenergetics |
Metabolism |
Calorimetry / Thermochemistry |
Carbohydrates
A correction on the Benedict test  Hill, William D., Jr.
Sodium hydroxide is also needed for the formation of copper(I) oxide in the identification of carbohydrates.
Hill, William D., Jr. J. Chem. Educ. 1982, 59, 334.
Qualitative Analysis |
Carbohydrates
Analysis of reducing sugars in breakfast cereal and other foods. A general chemistry experiment  Bittman, Robert
The experiment described here has been introduced in the freshman chemistry laboratory and has been found to be of interest to the student and instructive as well.
Bittman, Robert J. Chem. Educ. 1974, 51, 46.
Oxidation / Reduction |
Carbohydrates |
Food Science
Questions [and] Answers  Campbell, J. A.
Five questions requiring an application of chemical principles and their solutions.
Campbell, J. A. J. Chem. Educ. 1973, 50, 128.
Enrichment / Review Materials |
Proteins / Peptides |
pH |
Carbohydrates |
Molecular Properties / Structure
Letter to the editor  Bhatnagar, Vijay Mohan
Distinguishes between alpha- and beta-amylose and their mixtures, particular with respect to iodimetric titrations.
Bhatnagar, Vijay Mohan J. Chem. Educ. 1967, 44, 771.
Titration / Volumetric Analysis |
Carbohydrates
The geometry of giant molecules  Price, Charles C.
The author examines a variety of specific examples of natural and synthetic polymer molecules and describes how their geometric molecular arrangements influence their properties.
Price, Charles C. J. Chem. Educ. 1959, 36, 160.
Molecular Properties / Structure |
Proteins / Peptides |
Carbohydrates