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.
Author(s): DoITPoMS, University of Cambridge,J A Curran, Depa

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The discursive regulation of 'too fat' and 'too thin' bodies
A presentation by Helen Malson (University of the West of England) for the UBVO Obesity, eating disorders and the media workshop in November 2017
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7.8 Summary of Section 7

This section has sought to illustrate the formation of connections between neurons and their targets by exploring a few examples. The picture that emerges is one of cells at different stages of development subjected to a vast array of signals. These signals are the medium through which environmental factors exert their effects. To some of these signals, some cells respond; to other signals, other cells respond. What a cell, a neuroblast, a growth cone actually does is dependent on the combina
Author(s): The Open University

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18.417 Introduction to Computational Molecular Biology (MIT)
This course introduces the basic computational methods used to understand the cell on a molecular level. It covers subjects such as the sequence alignment algorithms: dynamic programming, hashing, suffix trees, and Gibbs sampling. Furthermore, it focuses on computational approaches to: genetic and physical mapping; genome sequencing, assembly, and annotation; RNA expression and secondary structure; protein structure and folding; and molecular interactions and dynamics.
Author(s): Lippert, Ross

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1.2 Grasping Gaelic

Activity 1

Please read the following poems by Sorley MacLean (linked below): ‘The Turmoil’, ‘Kinloch Ainort’, ‘Heroes’, ‘Death Valley’, ‘A Spring’, and ‘She to Whom I Gave…’. Some of the poems
Author(s): The Open University

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20.440 Analysis of Biological Networks (BE.440) (MIT)
This class analyzes complex biological processes from the molecular, cellular, extracellular, and organ levels of hierarchy. Emphasis is placed on the basic biochemical and biophysical principles that govern these processes. Examples of processes to be studied include chemotaxis, the fixation of nitrogen into organic biological molecules, growth factor and hormone mediated signaling cascades, and signaling cascades leading to cell death in response to DNA damage. In each case, the availability o
Author(s): Essigmann, John,Sasisekharan, Ram

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2 Odd one out

The image below shows models of four mammals:

  • Rhinoceros

  • Whale

  • Elephant

  • Hippopotamus

Figure 1
Author(s): The Open University

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6.1 Basic isotropy

As we have said, the photons in the 3 K background have been practically free from interaction with anything since about 4 × 105 years after the instant of the big bang. The present angular distribution of the microwave radiation – the way in which it is spread across the sky – is therefore almost the same as it was then. The spectrum we find today depends on the temperatures at that time – for the intensity of the radiation in a particular region of the early Unive
Author(s): The Open University

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Socially Responsible Investing
The Center for Leadership Ethics presented the 2014 Executive Ethics Symposium August 29, 2014 at The Lodge on the Desert
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Corporate Responsibility: The American Experience -- Archie Carroll Interview
ArchieCarroll, co-author of "Corporate Responsibility: The American Experience" -- the landmark U.S. business history -- shares insights from the project and the book produced by the Center for Ethical Business Cultures at the University of St. Thomas -- Minnesota. This thought-provoking history documents the societal challenges to corporate performance and power from the mid-eighteenth century to the modern day and traces evolution of ideas about responsibility of business and the modern corpo
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Radio Lingua Network News: 5 September 2008
The latest news from Radio Lingua including details of Coffee Break Spanish arrangements, new podcasts launched this autumn and the Radio Lingua video contest in which you can win an iPod.
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Husky Football Legend Napoleon Kaufman
Get caught up with the UW's all-time rushing yards leader, Napoleon Kaufman - from his time as part of the Husky national championship team, through his pro football career, to his current role as a senior pastor for the Well Christian Community Church in Livermore, California. Napoleon Kaufman, former Husky football player, senior pastor, Well Christian Community Church 04/26/2015 uwtv.org/uw360
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3.5.1 Final arousal

Emergence can be viewed as the final step in the series of periodic arousals. Instead of re-entering hibernation, the animal maintains the euthermic condition. The cue for maintaining this final arousal is probably not temperature, as some species emerge when T a is well below zero. It is also difficult to see how arousal could be affected by daylength, since the hibernating animal is usually underground in a cavity or a burrow. Perhaps fat or food stores reach a minimum lev
Author(s): The Open University

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1.3.3 Reverse turns and loops

In compact globular proteins, a polypeptide often makes a sharp turn called a reverse turn. For instance, these turns often link adjacent strands in antiparallel β pleated sheet (as represented in Figure 12a). Also known as β bends, reverse turns involve four amino acid residues with a hydrogen bond between the C=O group of the
Author(s): The Open University

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Las células eucariotas
OpenStax College
Al final de esta sección serás capaz de: Describir la estructura de las células (eucariotas) de plantas y animales. Puntualizar el papel de la membrana plasmática. […]

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An introduction to energy resources

Understanding energy resources involves considering all types of energy source from various sci
Author(s): The Open University

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LSE Festival 2018 | The Future of Ageing [Audio]
Speaker(s): Professor Rebeca Aldunate, Nicci Gerrard, Professor Michael Murphy, Jane Vass | With the average life expectancy increasing from 66.7 in 1942 to 81.25 in 2017, and set to continue, population ageing is poised to become one of the most significant social transformations of the 21st century. This panel discusses how ageing could come to dominate the giant issue of health and social care, and potentially all areas of the welfare state. Rebeca Aldunate is Director of the Biotechnology Sc
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Learn to Write the Upper Case Letters of the Alphabet
This video demonstrates how to write the 26 letters of the alphabet in capitals. Each capital letter's name is read by the narrator, while the correct pen stroke is illustrated via animation. (4:13)
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7.343 Protein Folding, Misfolding and Human Disease (MIT)
This course is one of many Advanced Undergraduate Seminars offered by the Biology Department at MIT. These seminars are tailored for students with an interest in using primary research literature to discuss and learn about current biological research in a highly interactive setting. The instructor for this course, Dr. Kosinski-Collins, is a member of the HHMI Education Group. Maintenance of the complex three-dimensional structure adopted by a protein in the cell is vital for function. Oftentimes
Author(s): Kosinski-Collins, Melissa

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The Physics of Music - Grade 11
Rory Adams, Free High School Science Texts Project, Mark Horner, Heather Williams


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