SEM image of open cell polyurethane foam
If a gas is injected into a liquid it forms a cellular foam structure. When a thermoset prepolymer of low viscosity is foamed, the polymer can drain from the cell walls (driven by surface tension) before it sets at the cell edges, leaving an open-celled foam. The cell edges have three concave sides, giving rise to the tri-cuspid cross section visible at the bottom of this image. The average co-ordination number for the nodes (where struts meet) is four, giving tetrahedral junctions.
NASA KSNN What do plants need to grow?
By definition, a plant is a living thing that produces its own food through photosynthesis. This process uses carbon dioxide and water. Trapping light from the Sun, plants are able to change sunlight's energy into useable chemical energy. Not only is chemical energy produced, but oxygen is a by-product of photosynthesis. Plants are essential to the balance of life on Earth - and to life, as we know it, on other planets.
Medicine Games: Control of the Cell Cycle
Play a game and find out about a Nobel Prize awarded discovery or work! In this game you are to take on the job as a Cell Division Supervisor. Are you familiar with the different phases in the cell cycle? If not, maybe you should pay extra attention to the image of the cell cycle in the introduction.
Herhalingsbundels Planètes 7-10 - Quartier étoile 5 Dit zijn herhalingsbundels bij het tweede deel van Quartier étoile 5. Ze bevatten per planète minstens de woordenlijst in kolommen zodat ze de vertaling kunnen noteren, maar soms ook wat simpele extra …
Lecture 16 - 11/18/2010
Lecture 16
Article :: Building Adobe WorkflowLab, Part 2: Planning for the Design of WorkflowLab
Continuing their series on the design and creation of WorkflowLab, Aaron Pedersen, James Polanco, and Doug Winnie, the authors of Adobe Flash Platform from Start to Finish: Working Collaboratively Using Adobe Creative Suite 5, discuss how they captured lightning in a bottle, focusing on planning ahead before doing any of the production work.
Article :: Adobe Digital Imaging How-to #52: Simplifying the Menus in Photoshop CS5
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Article :: Making Transformations in Adobe Illustrator CS4
The best part of drawing on a computer is that you rarely have to start over. Whether you've changed your mind about an angle or you drew a bunch of repeated objects too small (oops), Illustrator makes modifying your artwork very easy. Mordy Golding discusses how to use Illustrator's transform capabilities to manipulate any number of objects onscreen.
Transport Session Outline
Part Seven of Greening Business: Transport often makes up a major part of an organization’s carbon footprint, whether through commuting of employees, business travel, or transport of materials, products or waste. Organizations can reduce this component of their carbon footprint through a wide range of actions including more fuel efficient company cars, increased use of video conferencing, change of source location of materials, reduction in off-site waste transport, and incentives to reduce s
Transport Question Sheet
Question Sheet for Part Seven of Greening Business: Transport often makes up a major part of an organization’s carbon footprint, whether through commuting of employees, business travel, or transport of materials, products or waste. Organizations can reduce this component of their carbon footprint through a wide range of actions including more fuel efficient company cars, increased use of video conferencing, change of source location of materials, reduction in off-site waste transport, and inc
National Climate Data of Federal State Burgenland, Basic Data 1989, Austria
