Multi-species Interactions: Indirect Effects
Ecologists often study the dynamics of single-species populations or the interactions between two species, but real ecological systems comprise multiple species. Unique effects arising from the complexity of having more than two species present are termed indirect effects: effects of one species on a second species that arise only in the presence of one or more other species. In this laboratory, we will observe guppies foraging on Daphnia in the presence and absence of aquatic plants to test for
Use of the Rabbit Intestine in Smooth Muscle Pharmacology Experiments: A New Approach
This exercise is suitable for general physiology or zoology teaching laboratories.
Water and Solute Movement Through Red Blood Cell Membranes
This resource is a detailed laboratory exercise suitable for undergraduate laboratory courses in biochemistry, physiology and cell biology. It includes detailed background information and student outlines, instructors notes, and suggested anaylses.
Spot-Overlay Ames Test of Potential Mutagens
This protocol represents a cost-effective modification of the Ames Test that allows students to investigate the mutagenic potential of various common substances. Potential mutagens are tested using well-characterized auxotrophic strains of Salmonella typhimurium. By analyzing the results, students determine if any of their compounds may be mutagenic. Follow-up experiments are designed to determine the dose response of these potential mutagens. Using this protocol, we have achieved reproducible r
Shift Left: Technology and Healthcare
Edward E. Penhoet Annual Lecture on Biology, Behavior and Environment The Edward E. Penhoet Annual Lecture focuses on how biology, behavior, and environment intersect to produce health. Andy Grove, cofounder and senior adviser to executive management, Intel Corporation, will discuss the role of technology in solving the crisis in the U.S. health care system.
Worldwatch Institute Homepage
The Worldwatch Institute offers a unique blend of interdisciplinary research, global focus, and accessible writing making it a good source of information on the interactions among key environmental, social, and economic trends. Worldwatch's work revolves around the transition to an environmentally sustainable and socially just society - and how to achieve it. From their homepage, users can follow links to publications, a resource center, Worldwatch Live, a press room and research information.
Closeup of Solar Tadpoles with time tags
Here is a close-up view of dark tentacles or tadpoles moving towards the solar surface in this solar flare of April 21, 2002 seen by TRACE. One theory proposed in this press release is that they are due to voids created by magnetic reconnection in the flare. This version of the visualization displays the instrument clock time tags.
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Kepler - A Search for Habitable Planets
The Kepler Mission is part of NASA's Discovery Program, a series of lower-cost, highly focused planetary science investigations designed to enhance understanding of the solar system. This webpage describes how Kepler, scheduled for launch in 2006, will use a unique spaceborne telescope specifically designed to search for Earth-like planets around stars beyond our solar system. It will look for the "transit" signature of planets. A transit occurs each time a planet crosses the line-of-sight betwe
Students construct a rocket from a balloon propelled along a guide string. They use this model to learn about Newton's three laws of motion, examining the effect of different forces on the motion of the rocket.
Watt meters to measure energy consumption
Students use watt meters to measure the power required and calculate energy used from various electrical devices and household appliances.
Students make Moebius strips and use them to demonstrate the interconnectedness of an environment. They explore the natural cycles water, oxygen/carbon dioxide, carbon, nitrogen that exist within the environment.
Solving Energy Problems
The culminating energy project is introduced and the technical problem solving process is applied to get the students started on the project. By the end of the class, the students should have a good perspective on what they have already learned and what they still need to learn to complete the project.
Developing World - Crossword
Printable worksheet requiring knowledge of the keywords associated with the developing world. Answers are included.
Stills of the Polar Visible Aurora from January 10, 1997
Polar Visible Aurora from January 10, 1997
The Science Scoop: The Human Genome Project
This fun Web site is part of OLogy, where kids can collect virtual trading cards and create projects with them. Here, they learn about the human genome project by clicking through an online slide show, hosted by kids, that answers these questions: What's a genome, anyway?What is the human genome project? What does it mean to me?
What are the parts of speech?
This video teaches that parts of speech include nouns, pronouns, verbs, adverbs, adjectives, prepositions and more. Find out how conjunctions bring two thoughts together with help from a certified tutor . The video is in lecture format with the instructor pointing to and explaining examples that are on her computer screen. (1:50)
Klartext handlar i dag om att partiet Sannfinländarna har fått oväntat många röster i det finska valet som var igår. Nu kanske de får vara med i Finlands nya regering. Vi berättar också om en familj som fick sin hund tagen av vargar. Du får höra fler nyheter när du lyssnar på programmet.
The Royal Wedding and Social Distraction
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