Biology Animations Carnegie Mellon's Office of Technology for Education and Department of Biological Sciences create multimedia materials for teaching and learning Biology. After an analysis of a number of Biology courses was performed to identify when and how shared concepts where taught, a team of biologists, media programmers, and learning experts came together to create animations designed to improve understanding of some of the main concepts taught in Modern Biology and Biochemistry. Phosopholipid Membranes Tutorial page describing the construction and properties of Biological Membranes. Biological Membranes Biological membranes are dynamic structures composed of a diverse set of phospholipid molecules and proteins. Phase Transition This tutorial explains how phospholipids bilayers undergo to a cooperative phase transition or melting that is similar to protein denaturation. back to index Signal Transdaction Serine Protease Uniport - Glucose Transport Symport - Lactose Permease Transporter ATP Synthesis
Amazing Electron Microscope Photos Expériences Scientifiques sur l’Environnement et la Biologie Giorgio Carboni, Décembre 2000 Traduit par Caroline Varin en Janvier 2009 Plusieurs lecteurs nous ont écrit pour avoir plus d’expériences et pour savoir comment construire des jouets. Comme nous avons besoin de quelques mois pour compléter un article, nous avons pensé à collecter des sujets intéressants, à les pourvoir d’une brève description et à les relier à des sites qui existent déjà. De cette manière, nos lecteurs peuvent rapidement trouver plus d’activités intéressantes et amusantes. Les expériences que nous avons rassemblé dans cet article concernent essentiellement la biologie et l’environnement. Au fur et à mesure que le temps passe, nombres des liens que nous avons proposés vont disparaître, et d’autres sites vont naître. AVERTISSEMENTS: certaines de ces expériences peuvent être dangereuses. Amusez vous bien ! En utilisant un tamis avec des trous de 2 mm de diamètre, vous pouvez séparer les graviers du sable et déterminer leur proportion.
Home of CELLS alive! Electron Microscopy Interactive Java Tutorials - Virtual Scanning Electron Microscopy Interactive Tutorials Virtual Scanning Electron Microscopy We have teamed up with award-winning electron microscopist Dr. Dennis Kunkel to produce a series of interactive tutorials that explore various aspects of virtual Scanning Electron Microscopy (vSEM). When the tutorial is first loaded, the specimen is out of focus and brightness and contrast are not optimized. For questions about Scanning Electron Microscopy, email Dr. Contributing Authors Dennis Kunkel - Dennis Kunkel Microscopy, Inc., P. Matthew J. Questions or comments? This website is maintained by ourGraphics & Web Programming Team in collaboration with Optical Microscopy at theNational High Magnetic Field Laboratory.
Spinning-disk microscope offers window into the center of cell A new method of imaging cells is allowing scientists to see tiny structures inside the 'control centre' of the cell for the first time. The microscopic technique, developed by researchers at Queen Mary University of London, represents a major advance for cell biologists as it will allow them to investigate structures deep inside the cell, such as viruses, bacteria and parts of the nucleus in depth. Recent advances in optical physics have made it possible to use fluorescent microscopy to study complex structures smaller than 200 nanometres (nm) -- around 500 times smaller than the width of a human hair. These methodologies are called super-resolution microscopy. The drawback of such techniques is that they can only produce very clear images of structures that are at the bottom of the cell. This study shows how these issues have been overcome with a newly developed imaging system, making it possible to image structures as small as 80nm or less anywhere in the cell.
Make your own cartoons and animations easily. Our tools are free and you don't need to learn Flash. Project Nano Videos Bats Use Rolled-Up Leaves as “Trumpets” By Ker Than- A species of tiny bat seems to be using rolled-up leaves like trumpets to amplify calls, a new study says. A few years ago, biologists Gloriana Chaverri and Erin Gillam were in Costa Rica studying Spix’s disk-winged bat, a species that is known to escape predators and harsh weather by roosting inside the folded leaves of plants such as the lobster-claws plant and calatheas. Disk-winged bats inside leaves on Barro Colorado Island, Panama. The creatures are so small—each one weighs only about four grams—that multiple bats can fit inside a single leaf. While studying the bats, the scientists noticed that individuals roosting inside leaves often could not recognize calls made by members of their own group flying outside. “Then, given the shape of the leaf, we began to wonder if the leaves could increase sound intensity while affecting fidelity, much like acoustic horns do.” Hear, Hear Say What? However, roosting bats also make their own unique call, called a “response” call.
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