Dynamic Remodeling of Individual Nucleosomes Across a Eukaryotic Genome in Response to Transcription
The eukaryotic genome is packaged as chromatin with nucleosomes comprising its basic structural unit, but the detailed structure of chromatin and its dynamic remodeling in terms of individual nucleosome positions has not been completely defined experimentally for any genome. We used ultra-high–throughput sequencing to map the remodeling of individual nucleosomes throughout the yeast genome before and after a physiological perturbation that causes genome-wide transcriptional changes. Nearly 80%
Bioterrorism: plague as a biological weapon
Bioterrorism is the utilization of microorganisms or toxins in order to produce a disease and/or death in human beings, animals or plants. Different from conventional weaponry, relatively economic means are used that allow the elimination of living beings without destroying the surrounding atmosphere. The most probably method for spread of bioweapons is aerial transmission, continuing into water supplies and food. The CDC (US Centers for Disease Control and Prevention, Atlanta) has subdivided in
Water Science Curriculum
Water Science offers a two-semester water resource management curriculum for second year technical students or undergraduates in water resource management, water science, or environmental resource management programs. Water Science is divided into 6 major units. Each unit is divided into modules encompassing approximately a week's worth of lectures and labs.
In this hands-on OLogy activity, kids learn what happens when the rush of freshwater from a river collides with the gush of the ocean's tides. The activity begins with kid-friendly introductions to estuaries, salinity, and density. The illustrated, step-by-step directions show kids how to test the density of water at different levels of salinity and then investigate how a liquid's density affects the objects placed in it. It includes a fun look at the Dead Sea (Super Salty Sea) and why you can f
Journey to the Bottom of the Sea
This fun Web site is part of OLogy, where kids can collect virtual trading cards and create projects with them. Here, they learn about how living in the water differs from living on land. An ichthyologist first explains that ocean creatures have special features that allow them to breathe, eat, communicate, and move in water. (Each feature has its own trading card, which provides more detailed info.)Then students are challenged to "try to make the connection" by playing the Journey to the Bottom
Draw a Monarch Butterfly
This OLogy activity helps kids to learn about scientific illustrations by walking them through the steps for drawing a monarch butterfly. The activity begins by introducing kids to the importance of scientific illustration and why scientists prefer drawings to photographs. A photograph of a monarch and a printable monarch butterfly outline are included. In addition, students need color photographs, other research materials, paper, an eraser, and a variety of pencils. The process of creating the
Eye on Einstein
This OLogy activity challenges students to find nine inventions that Einstein's ideas helped to create. The activity begins with an illustration of Al's Junk Shop. Mixed in with his junk are a Global Positioning System, CD player, computer, calculator, scanner, laser pointer, TV, and representations of both laser surgery and nuclear energy. After making a mental list of their nine choices, students can click to a second page to check their answers. Each invention has a rollover note about how Ei
A.P.I. Girl, Auburn, Alabama
This image is a postcard made out of tooled leather and hand colored showing an Alabama Polytechnic Institute (A.P.I.) female student waving a flag. Alabama Polytechnic Institute is the former name of Auburn Unviersity. Handwritten message (on back) addressed to Miss Bernice Lowe, Opelika, Ala., dated and postmarked September 22, 1909.
How does the temperature of the Great Lakes change over time?
This classroom activity allows students to use water surface temperature, bathymetric data and weather data to look at trends in the water temperature of the Great Lakes. The exercise asks students to make predictions, and then use the data to answer questions. The site contains everything that is needed for the exercise, including student handouts, maps, links to data sources, and background information and questions for discussion.
This 16-slide PowerPoint presentation discusses the characteristics of granitoid rocks including geographic occurrence, rare earth elements, enclave characteristics, pressure-temperature conditions, the influence of water, and tectonic setting. This resource is part of the Teaching Petrology collection. http://serc.carleton.edu/NAGTWorkshops/petrology03/index.html
Field Project Tutorials: A Virtual (Structural) Field Project
This virtual five-day field mapping project allows students to construct a geological map from data provided by the web site. Students collect geologic, structural, paleontologic, strain and microstructural data observed at specific localities. Students are then able to derive a structural history for the area, including a field map, stereographs, and deformation plots. The site contains photographs and images, data, and all information that is needed to complete the exercise. It also provides s
Coastal Wave Mechanics
This site features Flash animations and a QuickTime movie that illustrate how waves and water molecules behave along the shore and in deep water settings. Animations depict the orbital motion of water molecules and show cross sections of waves at varying depths. These resources are suitable for use in lectures, labs, or other teaching activities.
Binary and Greater Systems
This PowerPoint presentation is part of the Whitman College petrology course. The presentation covers isobaric ternary T-X diagrams (An-Di-Fo), liquidus, intensive variables, cotectic, peritectic, and cooling paths. Solid solution and 4 component diagrams are described as well as the effect of water on melting temperatures. This resource is part of the Teaching Petrology collection. http://serc.carleton.edu/NAGTWorkshops/petrology03/index.html
This NASA site explains the three major types of atmospheric aerosols - volcanic emissions, desert dust, and anthropogenic aerosols - and how they affect global climate. The site discusses the generation and atmospheric distribution of these aerosols, as well as the chemical and physical processes by which they create global cooling.
This site features Java Applet, QuickTime, and Flash animations that illustrate characteristics and functions of the atmosphere. They show how atmospheric temperature, pressure, and density change with respect to changing altitude, the way different kinds of radiation (x-ray, ultraviolet, visible, and infrared) act in various levels of the atmosphere (troposphere, stratosphere, mesosphere, and thermosphere/ionosphere), how oxygen gas and chlorofluorocarbons (CFCs) interact with ultraviolet radia
Animation of Wave Motion
This Flash animation illustrates wave motion, or the movement of energy through water. Users can stop, play, fast forward and rewind the animation at any time. This visualization is one of several animations in a series developed as a component of Exploring Earth, a website that supports the textbook Earth Science.
History: Ask a Question
lets students correspond with government historians via email. Historians' names and addresses are listed by expertise with an emphasis towards those researching the national parks, the National Park Service, and American history.
Fire Management, Everglades National Park
This site describes how fire is used to maintain the biological diversity and natural processes of the pineland, prairie, and other ecosystems of the Everglades that are shaped by the interaction of fire and water.
Based on UNICEF's annual flagship publication, The State of the World's Children report (SOWC), the U.S. Fund for UNICEF has developed and released these free resources for educators to use with students in grades 3-12. The lesson plans and resources in these units are designed to be used sequentially or separately. Topics include addressing global affairs issues such as the Millennium Development Goals, real life stories from youth, the causes of childhood exclusion, and water and sanitation.
Environmental Catalyst Module
In the Environmental Catalysis Module, a joint project with the Institute for Environmental Catalysis at Northwestern University, students learn what a catalyst is and become aware of the use of catalysis to promote environmental protection. Besides introducing the concept of catalysis, the module also focuses other issues such as catalytic selectivity, specificity, poisoning, condition optimization, and waste minimization. The first activity of the module introduces the concept of catalysis in