2.6 Underground mining

Coal extraction is of course less straightforward using underground mining techniques. The associated costs are higher, and these begin with the sinking of two shafts, an 'upcast' and a 'downcast' shaft for ventilation (Figure 22). Sinking these to a depth of a kilometre may take a few years and during this time,
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Learning outcomes

After studying this course, you should be able to:

  • explain the principles that underlie the ability of various natural phenomena to deliver solar energy

  • outline the technologies that are used to harness the power of solar energy

  • discuss the positive and negative aspects of solar energy in relation to natural and human aspects of the environment.


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Video - European Spanish Words of the Week #5 - Bugs
We'll correct your Spanish! Leave us a comment on this lesson at SpanishPod101.com!
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Supporters of traditional marriage rally in Washington
Thousands who support traditional marriage gathered in front of the U.S. Capitol to march to the Supreme Court ahead of this week's hearing on gay marriage. Rough Cut (no reporter narration). Subscribe: http://smarturl.it/reuterssubscribe More updates and breaking news: http://smarturl.it/BreakingNews Reuters tells the world's stories like no one else. As the largest international multimedia news provider, Reuters provides coverage around the globe and across topics including business, financi
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時計台サロン「未来を創る北大農学の使命」の映像を公開しました。Podcast
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References

Huse, M. and Kuriyan, J. (2002) The conformational plasticity of protein kinases, Cell, 109, pp. 275–282.
Lipscomb, W. N., Reeke, G. N. Jr, Hartsuck, J. A., Quiocho, F. A. and Bethge, P. H. (1970) The structure of carboxypeptidase A. 8. Atomic interpretation at 0.2 nm resolution, a new study of the complex of glycyl-L-tyrosine with CPA, and mechanistic deduction
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"What Comes After" by Steve Watkins--The Pick of the Week from 60 second Recap®
In this video, teenage students will be introduced to "What Comes After" by Steve Watkins. Iris Wight has it rough. Her father's dead. Her best friend's family has decided they can't keep her. Alone and hurting, Iris ends up at horrible Aunt Sue's where her only solace is the goats ... and even those, Iris discovers, can be taken from her in an instant. The first half of "What Comes After" is a particularly tough read, but Iris is a compelling protagonist whose falling-apart life still has
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2.2 Winning coal in former times

Coal was probably first used as a fuel by early Chinese civilizations, and there is evidence for coal working in the UK since Roman times. However, early approaches to mining were limited by the available technology, and left much of the coal behind.

At first, coal was dug from seams exposed at the surface in shallow excavations into valley sides that followed the coal seam. The amount of coal that could be extracted from these trenches and from adits (short horizontal tunnels) w
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7.5 Summary of Section 7

  1. Site-directed mutagenesis is an important technique for studying protein function. Using recombinant DNA technology, selected amino acids can be substituted with different residues to alter the structure and function of a protein. One widely used method employs primer extension. SDM studies can help identify residues that are critical for interactions or catalytic activity.

  2. Protein–protein interactions can be studied in a number of different
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RVC 25 - The Role of Mitochondria in Health and Disease
Mitochondria are cell organelles which play a critical role in energy supply in most higher organisms. But how did that role develop and how do they achieve this function? In the latest episode of the RVC Podcast Dr Michelangelo Campanella discusses these questions and relates his research findings on how poor mitochondrial function can contribute greatly to disease processes.
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5.9 Membrane filtration

Membrane filtration is a process whereby particles smaller than about 10−2 mm (which can pass through sand filters) are removed using synthetic polymeric membranes and a high pressure. The membrane effectively acts as a sieve.

It is increasingly becoming popular as an advanced treatment process for water (especially for removal of Cryptosporidium) and wastewater (where water reuse takes place), and various possibilities are:

  • <
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7.340 Immune Evasion: How Sneaky Pathogens Avoid Host Surveillance (MIT)
Every infection consists of a battle between the invading pathogen and the resisting host. To be successful, a pathogen must escape the many defenses of the host immune system until it can replicate and spread to another host. A pathogen must prevent one of three stages of immune function: detection, activation, or effector function. Examples of disease-specific immune evasion and the mechanisms used by pathogens to prevail over their hosts' immune systems are discussed. Also considered is what
Author(s): Halme, Dina Gould

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28.12.2011 – Langsam gesprochene Nachrichten
Trainieren Sie Ihr Hörverstehen mit authentischen Materialien. Nutzen Sie die Nachrichten der Deutschen Welle von Mittwoch – als Text und als verständlich gesprochene Audio-Datei.Die USA haben Syrien zu einer umfangreichen Zusammenarbeit mit den Beobachtern der Arabischen Liga aufgefordert. Sollte das syrische Regime weiterhin Widerstand gegen die Bemühungen der Liga leisten oder sie ignorieren, dann werde die internationale Gemeinschaft andere Mittel zum Schutz syrischer Zivilisten in Betr
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Persoonsvorm - onderwerp : Werkblad
zinsleer.jpg

Met dit werkblaadje oefen je op het zoeken van de persoonsvorm en het onderwerp.


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Virtual yeast cell
This rich learning object is used to introduce yeast cytology to students taking Module D24BS3 Brewery Yeast Management as part of the MSc in Brewing Science. The virtual cell permits the students to understand structure and function of yeast organelles.
Author(s): Smart Katherine;Wang Steve

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Except for third party materials (materials owned by someone other than The University of Nottingham) and where otherwise indicated, the copyright in the content provided in this resource is owned by

7.342 Cancer Biology: From Basic Research to the Clinic (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. In 1971, President Nixon declared the "War on Cancer," but after three decades the war is still raging. How much progress have we made toward winning the war and what are we doing to improve the f
Author(s): Kim, Carla,Haigis, Kevin

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Lindy Hop - Hellzapoppin (1941)
Whitey's Lindy Hoppers excerpt from "Hellzapoppin" (1941) featuring Frankie Manning (in the Mechanic's Dungarees). (2:22)
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Workshop 6: Force Against Force
Magnets stick to other magnets and to metal objects made of iron or steel. How much force is required to break the attraction between two magnets? In this workshop, fourth-grade students explore ways to balance the force of magnetism against the force of gravity. A magnet placed in a cup on one side of a pan-balance is stuck to a stationary magnet beneath the cup. When e
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Introduction

Inspired by the Scientific Revolution of the seventeenth century, the intellectuals of eighteenth-century Europe launched a dazzling programme for the extension of knowledge and for the promotion of human welfare. Their programme has become known as the ‘Enlightenment’ and their age is often called the ‘Age of Enlightenment’.

This unit is concerned with science in Scotland, one of the most dynamic centres of Enlightenment thinking. Writers speak of the mid-eighteenth century as
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