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Accidental Drowning or Foul Play?
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This case was developed for use in the first semester of a sophomore organic chemistry laboratory to illustrate how a combination of techniques is usually required in the identification of chemical compounds. It involves a murder mystery with a forensic twist. Students are told that two bodies have recently been recovered from two different lakes. Due to a mix-up at the morgue, the coroner's office is unable to determine which body came from which lake. The students' task is to develop a methodology to solve this mystery as well as determine whether the deaths were the result of murder or mishap. The case could also be used in instrumental analysis courses or adapted for a non-majors course in the general education curriculum.

Author:
Monika I. Konaklieva
Accidental Scientist: Science and Technology of Cooking
Conditional Remix & Share Permitted
CC BY-NC-SA
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This site looks at the science behind food and cooking. Learn about what happens when you eat sugar, bake bread, cook an egg, or pickle foods. Find out how muscle turns to meat, what makes meat tender, and what gives meat its flavor. Take tours of breads and spices of the world. Explore your sense of taste and smell.

Subject:
Physical Science
Material Type:
Activity/Lab
Author:
Exploratorium
Date Added:
10/13/2004
Acids, pH, and Buffers: Some Basic Chemistry for Biological Science
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In this "clicker case," a three-year-old girl gets into the medicine cabinet and ingests an unknown number of aspirin tablets. Her brother calls 911 and the girl is taken to a nearby hospital, where she is treated. The case is used to discuss the Law of Mass Action, chemical equilibrium and equilibrium constants, pH, and weak acids and buffers in the context of medical management of a life-threatening emergency. It is called a "clicker" case because it is designed to be presented in a class that uses personal response systems, or "clickers." The case is presented via a series of PowerPoint slides (~400KB) punctuated by multiple-choice questions, which the students answer using their clickers. It could be adapted for use without these technologies. The case is suitable for use in an introductory biology course where integration with biologically relevant chemistry is an important course objective. It could also be used in a chemistry course.

Author:
Terry Platt
Advanced Kitchen Chemistry, Spring 2002
Conditional Remix & Share Permitted
CC BY-NC-SA
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This seminar will be a scientific exploration of the food we eat and enjoy. Each week we shall have a scientific edible experiment that will explore a specific food topic. Topics include, but are not limited to, what makes a good experiment, cheese making, joys of tofu, food biochemistry, the science of spice, what is taste?

Subject:
Chemistry
Physical Science
Material Type:
Full Course
Textbook
Author:
Christie, Patricia
Date Added:
01/01/2002
An Adventure in Stereochemistry: Alice in Mirror Image Land
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Playfully alluding to Lewis Carroll's tale of Alice Through the Looking Glass, this case study considers the problems that would arise if a person were to cross over into a mirror-image environment. Students read about a drowsy undergraduate studying for a stereochemistry exam who finds herself in a place where spearmint gum tastes like caraway seed. The case emphasizes the lock-and-key theory of enzyme action and stresses the need for molecules to have the proper chirality if they are to be biologically useful. Designed for introductory organic chemistry and biochemistry courses, the case could also be used in biology courses.

Author:
Gordon T. Yee
Frank J. Dinan
Afterimage
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In this activity about light and perception, learners discover how a flash of light can create a lingering image called an "afterimage" on the retina of the eye. Learners will be surprised when they continue to see an image of a bright object after staring at it and looking away. Use this activity to introduce learners to principles of optics and perception as well as to explain why the full moon often appears larger when it is on the horizon than when it is overhead. This lesson guide also includes a few extensions like how to take "afterimage photographs."

Author:
The Exploratorium
California Department of Education
NEC Foundation of America
National Science Foundation
Air Has Matter
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This is a series of activities demonstrating that air has mass, takes up space, and can exert a force on objects enough to lift them.

Author:
Caroline Sorensen
Sorensen, Caroline
Air Is Matter
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This is a series of investigations about air and its properties. How air exists all around us, and things it is capable of doing.

Author:
Caroline Sorensen
Air- She's So heavy!
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This is an inquiry activity that relies of pervious understanding of balancing and weighing to introduce a properties of air.

Aldol Reaction OR Aldol condensation in aldehydes and ketones for IIT Chemistry| class 12 Chemistry
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Topics included in this chapter are given below:
In some cases, the adducts obtained from the Aldol Addition can easily be converted (in situ) to α,β-unsaturated carbonyl compounds, either Thermally or under acidic or basic catalysis. The formation of the conjugated system is the driving force for this spontaneous dehydration. Under a variety of protocols, the condensation product can be obtained directly without isolation of the aldol.
Mechanism of aldol reaction is of two types Acid Catalysed and base catalysed.Cross aldol reactions and number of products also discussed.Intramolecular aldol reaction and some IIT questions also discussed.
Aldol Reaction,Aldol condensation,aldehydes,ketones,iit-jee,iit chemistry,chemistry class 12,dronstudy.com,dronstudy

Author:
Dronstudy
Amanda's Absence: Should Vioxx Be Kept Off the Market?
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When chronic pain forces a top student to withdraw from college, biology instructor Dr. Sharpe learns that medications (in this case, Vioxx) may be removed from the market for many reasons, including safety concerns. As the case unfolds, students learn how the FDA balances drug safety against medical needs. As written, the case is appropriate for a non-majors biology course. It could also be adapted for use in a more advanced course in cell biology, pharmacology, or biochemistry, or modified to explore statistical analysis, specific analytical methods used for risk/benefit analysis, or bioethical issues.

Author:
Dan Johnson
Analysis of Biological Networks (BE.440), Fall 2004
Conditional Remix & Share Permitted
CC BY-NC-SA
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This class analyzes complex biological processes from the molecular, cellular, extracellular, and organ levels of hierarchy. Emphasis is placed on the basic biochemical and biophysical principles that govern these processes. Examples of processes to be studied include chemotaxis, the fixation of nitrogen into organic biological molecules, growth factor and hormone mediated signaling cascades, and signaling cascades leading to cell death in response to DNA damage. In each case, the availability of a resource, or the presence of a stimulus, results in some biochemical pathways being turned on while others are turned off. The course examines the dynamic aspects of these processes and details how biochemical mechanistic themes impinge on molecular/cellular/tissue/organ-level functions. Chemical and quantitative views of the interplay of multiple pathways as biological networks are emphasized. Student work will culminate in the preparation of a unique grant application in an area of biological networks.

Subject:
Biology
Chemistry
Life Science
Physical Science
Material Type:
Full Course
Textbook
Author:
Essigmann, John
Sasisekharan, Ram
Date Added:
01/01/2004
Analytical Chemistry
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Analytical chemistry spans nearly all areas of chemistry but involves the development of tools and methods to measure physical properties of substances and apply those techniques to the identification of their presence (qualitative analysis) and quantify the amount present (quantitative analysis) of species in a wide variety of settings.

Another Can of Bull?  Do Energy Drinks Really Provide a Source of Energy?
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This case is a "clicker" adaptation of a similarly titled case by Merle Heidemann and Gerald Urquhart of Michigan State University, "A Can of Bull?" The story introduces students to basic principles of metabolism and energy through a biochemical analysis of commonly available "energy drinks" that many students purchase at relatively high prices. Students learn to define energy in a biological/nutritional context, identify valid biochemical sources of energy, discuss how foods are metabolized to generate ATP, and critically evaluate marketing claims for various energy drinks. The case can be used in introductory level courses to introduce these principles or as a review of basic biochemistry and nutrition for upper-level students in nutrition, physiology, or biochemistry courses. The case is presented in class using a PowerPoint (~2.3MB) that is punctuated by multiple-choice questions students answer using personal response systems, or "clickers."

Author:
Cheryl D. Davis
Nancy A. Rice
Antioxidant Enzymes: Three or Four Veggies a Day Keeps Aging Away
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The purpose of this video lesson is to expand the student's knowledge about enzymes by introducing the antioxidant enzymes that are intimately involved in the prevention of cellular damage and eventual slowing of the aging process and prevention of several diseases. Students will learn that natural antioxidant enzymes are manufactured in the body and provide an important defense against free radicals. The topic of free radical action is introduced, covering how they are constantly generated in living cells both by ''accidents of chemistry'' and also by specific metabolic processes.

Author:
Sawsan F. Karadsheh
Archimedes' Puzzle
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In this math activity, learners explore the history of the Stomachion (an ancient tangram-type puzzle), use the pieces to create other figures, learn about symmetry and transformations, and investigate the areas of the pieces. The Stomachion, believed to have been created by Archimedes, consists of 14 pieces cut from a square, which can be rearranged to form other interesting shapes.

Author:
Thinkfinity/Verizon Foundation
Samuel E. Zordak
NCTM Illuminations
Aromatics and Cyclic Compounds - Crash Course Chemistry #42
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What's that smell? Smell's like Organic Chemistry! This week Hank talks about Aromatics and Cyclic Compounds and naming their substituents, resonance as well as common reactions & uses.
Table of Contents
Cyclic Organic Compounds & Naming Their Constituents 1:06
Aromatic Compounds 3:02
Resonance 3:18
Naming Aromatic Compounds 5:05
Common Reactions & Uses 7:24

Author:
CrashCourse
Atoms and Molecules
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Both of these lessons are classroom activities that require students to build models that display understanding of atoms and molecules. One lesson is structured while the other is guided.

Author:
Carrie Robatcek