Active Transport in Insect Malpighian Tubules
The Malpighian tubules of insects are an excellent model for examining the properties of secretion in a transporting epithelium. In this exercise students expose tubules from cockroaches or crickets to chlorophenol red and visually estimate the dye concentration in the lumen. By adding metabolic inhibitors and competitors or by substituting ion-free media they can demonstrate competition, specificity, and energy- or ion-dependence of active transport. Advanced students can design their own exper
LISE08 talk on Second Life in the Chemistry Classroom
I talked about Second Life in the chemistry classroom at the Chemical Heritage Foundation on April 29, 2008. This was part of the 8th Annual Leadership Initiative in Science Education (LISE 8). Most examples involve work done in collaboration with Andrew Lang. At the end I invite the group to an in-world meeting on May 6, 2008 at 13:30 EDT on ACS
Israeli air strikes light up night sky in Gaza
Israeli air strikes hit Gaza after Israeli Prime Minister Benjamin Netanyahu said Israel's military campaign may be extended. Gavino Garay reports. Subscribe: http://smarturl.it/reuterssubscribe More updates and breaking news: http://smarturl.it/BreakingNews Reuters tells the world's stories like no one else. As the largest international multimedia news provider, Reuters provides coverage around the globe and across topics including business, financial, national, and international news. For ov
From Clay to Bronze
In 2008 the Chapel of St. Thomas Aquinas at the University of St. Thomas was renovated. Included in this renovation was the installation of a new crucifix and new structures around the altar.
New 'Smart' Garden at Duke
The new garden at Duke's Smart Home applies technologies for cultivating and landscaping. Learn more at http://smarthome.duke.edu.
Elevate - Brain Training App for Android
'Elevate is a brain training app designed to improve focus, speaking skills, processing speed, and more. Each person is provided with his or her own personalized training program that adjusts over time to maximize results.With regular training, Elevate will help you improve critical cognitive skills that are proven to boost productivity, earning power, and self-confidence.FEATURES* 16 games for critical skills like focus, processing, precision, and comprehension * Detailed performance track
Electron Transport Chain Study Guide
A colorful study guide summarizing the electron transport chain in the mitochondria of eukaryotic organisms.
Ruth Rendell interviewed by David Grylls
Acclaimed crime writer Ruth Rendell discusses with David Grylls, Director of Studies, Literature and Creative Writing, the latest edition of the Penguin Complete Sherlock Holmes, for which she has supplied the introduction.
Symbols of Culture
PTPI's Global Youth Murals Project poses a wonderful introduction to the ways in which children around the world represent their cultures through visual art. Using this collection in the Global Gallery, learners can examine different depictions of culture as an entry point to studying cultures of countries around the world. This activity can be an introductory exercise to social studies or world geography research projects.
Setting Goals, Building Solutions
In this lesson, students consider the value of setting goals for themselves and for their community, thinking critically about the idea of defining community and shared interests and concerns. This is an introduction to the concepts that underlie the Millennium Development Goals.
This text manual introduces statistical analysis and its underlying philosophy, enabling students to understand how to describe the confidence they have in their analysis. Statistical analysis is one of the most widely used, and abused, techniques in the biological sciences. Statistics are ostensibly used to allow an investigator to be objective. That is, the researcher uses statistical tests to determine whether or not his/her hypothesis is supported by the data collected. Unfortunately, the
Learning to Think Mathematically
Concerned that most students leave college thinking of mathematics as a fixed body of knowledge to be memorized, Cooperstein designed a new course to help students learn to think mathematically for themselves. This website serves as a course portfolio that documents the new class, Introduction to Mathematical Problem Solving. The principal activity in the class involved students working on and discussing novel problems which required them to formulate experiments, work out cases, look for patter
Detection of Genetically Modified Foods
Genetically modified foods are often in the news and widely grown in the United States. Three US government agencies (USDA, FDA, and EPA) work to regulate the introduction and production of genetically modified foods. These crops can provide agricultural, ecological and nutritional benefits, but there are also potential risks to the environment and consumers. As consumers and public interest groups around the world have become aware of these risks, there has been a call for more explicit product
An Introduction to DNA: Spectrophotometry, Degradation, and the 'Frankengel' Experiment
In this laboratory students perform three exercises as an introduction to the basics of handling and analyzing DNA. In the first, they expose circular plasmid, linear phage, and high molecular weight genomic DNA samples to a variety of physical, thermal, chemical, and enzymatic conditions that might be expected to affect DNA integrity. The DNA's are analyzed by electrophoresis on a group agarose gel. In the second, they pour and reconstruct a "Frankengel" (a gel containing sections with three di
You may have met complex numbers before, but not had experience in manipulating them. This unit gives an accessible introduction to complex numbers, which are very important in science and technology, as well as mathematics. The unit includes definitions, concepts and techniques which will be very helpful and interesting to a wide variety of people with a reasonable background in algebra and trigonometry.
Vegetation Images Show Drought in Western US (WMS)
Satellite data can gauge the health of plants, which is a good indicator of drought. The Normalized Difference Vegetation Index (NDVI) measures how dense and green plant leaves are. NDVI images are useful as a measure of drought when compared to "normal" plant health. Scientists calculate average NDVI values for an area to find out what is normal at a particular time of year. This animation uses satellite imagery to show changes in vegetation between 1999 and 2003. In 2002, drought had settled a
Introduction to Adobe Director
A set of training videos including commentary and animation made with Camtasia. These videos take you through an introduction to Adobe Director using Lingo.
Transport Processes in the Environment, Fall 2004
Introduction to momentum and scalar transport in environmental flows, with emphasis given to river and lake systems. Derivation and solutions to the differential form of mass conservation equations. Topics include: molecular and turbulent diffusion, boundary layers, dissolution, phase partitioning, bed-water exchange, air-water exchange, settling and coagulation, buoyancy-driven flows, and stratification in lakes.
Statistical Reasoning I
Statistical Reasoning in Public Health provides an introduction to selected important topics in biostatistical concepts and reasoning through lectures, exercises, and bulletin board discussions. It represents an introduction to the field and provides a survey of data and data types. Specific topics include tools for describing central tendency and variability in data; methods for performing inference on population means and proportions via sample data; statistical hypothesis testing and its appl
Global Tobacco Control
Provides an introduction to global tobacco control. Presents the health and economic burden of tobacco use worldwide and highlights practical approaches to tobacco prevention, control, surveillance, and evaluation. Examines transnational tobacco control issues, including the following: the interpretation and packaging of epidemiologic evidence for policy makers, the determinants of tobacco addiction, the economics of global tobacco control, tobacco industry strategies, legal foundations for regu