Talking Glossary of Genetic Terms Glossary Home | Text Version Designed to help learners at any level better understand genetic terms Guided by national science standards Explained by scientists at the NIH The National Human Genome Research Institute (NHGRI) created the Talking Glossary of Genetic Terms to help everyone understand the terms and concepts used in genetic research. In addition to definitions, specialists in the field of genetics share their descriptions of terms, and many terms include images, animation and links to related terms. Enter a search term or explore the list of terms by selecting a letter from the alphabet on the left and then select from the terms revealed. (A text-only version is available from here.) The Talking Glossary At the bottom of most pages in the Talking Glossary are links to help you get the most out of this glossary.
Simple Machines: Facts (Science Trek: Idaho Public Television) Once upon a time a person needed to move something heavy. He or she picked up a long stick and stuck it under the edge of the heavy object and then pushed down on the other end of the stick. And the first simple machine was invented. Simple machines are just that. There are 6 basic simple machines; the lever, the wheel and axle, the inclined plane, the wedge, the pulley, and the screw. But what is work? The Lever The lever is a long tool such as a pole or a rod put under an object to lift it. Levers are all around us. The Wheel & Axle The wheel has always been considered a major invention in the history of mankind. Wheels are found where things turn in a circle such as an electric fan, a motor, a revolving door, a merry go round, and any wheel — on the car, on your skateboard, or on a bicycle. The Inclined Plane The inclined plane is simply a ramp. Ramps are used in skateboard parks, wheelchair ramps and to get heavy equipment in and out of the back of trucks. The Wedge The Pulley The Screw
Magnifying the Universe Embed this infographic on your site! <iframe width="500" height="323" scrolling="no" src=" frameborder="0" allowfullscreen></iframe><br />Copyright 2012. <a href=" the Universe</a> by <a href=" Sleuth</a>. The above is an interactive infographic. Introduction: This interactive infographic from Number Sleuth accurately illustrates the scale of over 100 items within the observable universe ranging from galaxies to insects, nebulae and stars to molecules and atoms. While other sites have tried to magnify the universe, no one else has done so with real photographs and 3D renderings. We hope you have a blast magnifying the universe, know that each time you zoom in a depth, you're magnifying the universe 10x ... and every time you zoom out, the bigger objects are 1/10th of their prior size. How To Use: Credits:
6 Simple Machines: Making Work Easier Throughout history, humans have developed a number of devices to make work easier. The most notable of these are known as the "six simple machines": the wheel and axle, the lever, the inclined plane, the pulley, the screw and the wedge, although the latter three are actually just extensions or combinations of the first three. Because work is defined as force acting on an object in the direction of motion, a machine makes work easier to perform by accomplishing one or more of the following functions: transferring a force from one place to another, changing the direction of a force, increasing the magnitude of a force, or increasing the distance or speed of a force. Many machines combine more than one of these devices to make work easier. Wheel and axle The wheel is considered to be one of the most significant inventions in the history of the world. The wheel greatly reduces the friction encountered when an object is moved over a surface. Force multipliers Lever Inclined plane Pulley Screw
2012 March 12 - The Scale of the Universe Interactive Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 March 12 The Scale of the Universe - Interactive Flash Animation Credit & Copyright: Cary & Michael Huang Explanation: What does the universe look like on small scales? Tomorrow's picture: dust before galaxies Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)NASA Official: Phillip Newman Specific rights apply.NASA Web Privacy Policy and Important NoticesA service of:ASD at NASA / GSFC& Michigan Tech.
InventorsToolbox: The Elements of Machines Simple Machines: These devices were all in common use for centuries before Leonardo's time. Each one makes work easier to do by providing some trade-off between the force applied and the distance over which the force is applied. Wheel and Axle In this machine a wheel or spoke is locked to a central axle so that when one is turned the other must turn. A longer motion at the edge of the wheel is converted to a shorter more powerful motion at the axle. In reverse, a short powerful force at the axle will move the wheel's edge a greater distance. Pulley System A single pulley simply reverses the direction of a force. Wedge A wedge converts motion in one direction into a splitting motion that acts at right angles to the blade. Screw A screw is a central core with a thread or groove wrapped around it to form a helix. Lever A lever is a stiff rod that rotates around a pivot point. Gears Gears are toothed or pegged wheels meshed together to transmit motion and force.
The Science Behind Foldit | Foldit Foldit is a revolutionary new computer game enabling you to contribute to important scientific research. This page describes the science behind Foldit and how your playing can help. What is a protein? Proteins are the workhorses in every cell of every living thing. What are amino acids? What shape will a protein fold into? Why is shape important? What do proteins do? Proteins are present in all living things, even plants, bacteria, and viruses. Photosystem I is a collection of proteins in plants that captures sunlight for photosynthesis.Luciferase catalyzes the chemical reaction that makes fireflies glow.Hemagglutinin helps the influenza virus invade our cells. You can find more information on the rules of protein folding in our FAQ. What big problems is this game tackling? Protein structure prediction: As described above, knowing the structure of a protein is key to understanding how it works and to targeting it with drugs. How does my game playing contribute to curing diseases?
Gear Generator Animation: * Shift + Enter: Set RPM of the selected gear #0 - N8 - ratio: 1:1 - RPM: 6#1 - N16 - ratio: 2:1 - RPM: 3#2 - N12 - ratio: 2:1 - RPM: 3#3 - N60 - ratio: 10:1 - RPM: 0.6 Connection properties Gear properties * Shift + Enter: modifies the Diametral pitch Download Display Units Gear Generator is unitless: if you wish it's inches, cm or millimeters. About Gear Generator is a tool for creating involute spur gears and download them in DXF or SVG format. Why this tool was created? Support: abel@iparigrafika.hu Notes about browser compatibility: all new major browsers are supported (i didn't tested IE), but unfortunately Chrome can't render SVG circle correctly. The downloaded DXF file can be opened with AutoCad 2013 or newer versions. Update 1.5: Fixed DXF resolution issue. Update 1.4: TA-DA: Added internal gear support, and the ability of positioning the first gear. Update 1.3: Fixed DXF file format. On YouTube Check out other tools I made:Print Charts, Flip.World, HTML Spirograph.