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2.7 Fluorine (F)

Fluoride ions (F ) are rare in foods, though some are found in tea and in seafood. However, fluoride does occur naturally in some water supplies, derived from the rocks through which the water flows. Its only role in the body appears to be to help to protect teeth from decay.

The stages of tooth decay are as follows:

  • bacteria live in saliva on teeth (form plaque)

  • produce lactic acid → dissolves calcium salts in too
    Author(s): The Open University

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5.6 A way of dealing with social pressures: decoupling

Organisations often deal with these social pressures by decoupling responses to these different pressures. The need to appear legitimate in the eyes of important constituencies is met by actions and practices which have a purely ceremonial character: they are done for the sake of appearances and not with any real engagement. The example in Author(s): The Open University

Learn Latin - Animals
In this presentation, you will learn the latin words for a variety of animals.  You will see pictures of the animals while the words are shown on the screen in both english and latin.  The words are being pronounced clearly in Latin while you view the words and pictures
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2.6 Mind mapping

The term mind mapping was devised by Tony Buzan for the representation of such things as ideas, notes and information, in radial tree diagrams — sometimes also called spider diagrams. These are now very widely used — try a web search on ‘Buzan’, ‘mind map’ or ‘concept map’.

Author(s): The Open University

6.4 Blogs

The founder of Technorati claims that the number of 'blogs' doubles every five months and that the creation rate is approaching two per second. One estimate I read in July 2010 put the number at 400 million blogs. Because these online diaries offer instant publishing opportunities, you potentially have access to a wealth of knowledge from commentators and experts (if they blog) in a
Author(s): The Open University

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Acknowledgements

The content acknowledged below is Proprietary (see terms and conditions) and is used under licence.

Course image: Courtesy of banlon1964 Flickr [accessed 27 October 2006]

All other material within this course originated at the Open University

Don't miss out:

If reading this text has inspired you to learn more, you may be interested in joining the millions of people who discover our free learning resources and qualifications by visiting The Open University -
Author(s): The Open University

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Britons imported wheat before farming it
Full Story: http://bit.ly/1wucJ1x The discovery of DNA in the southern part of the UK from what appears to be ancient wheat flour hints at a trade in what would have been a prestigious food
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Seminar 6- USAWC Distance Education Class of 2011
One more challenge faced the senior officers as they celebrated completion of two years of internet-based studies at the Army War College's distance education program. The largest graduation class in college history received their diplomas on a day of record-breaking heat, July 22, at historic Carlisle Barracks.
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Legatum Lecture: Alexander Osterwalder "Mastering Business Model Innovation"

The Business Model Canvas, a conceptual management tool to visualize, discuss, and invent business models, has known a phenomenal success around the world. Now its inventors, Alexander Osterwalder and Yves Pigneur are working on a series of new practical tools to continue to revolutionize how executives and entrepreneurs think of business. Besides explaining the Business Model Canvas, Alexander will elaborate on the usability of management concepts and how this
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1960s Batman Fight Scene Featuring Onomatopoeia
A 1960s fight scene from the original Batman series to demonstrate the use of onomatopoeia words in action. (1:39)
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Wisdom of Elders
Can you think of a story from a grandparent or great-grandparent that has been passed down in your family?  For some, time and distance make it hard to learn from our elders.  That’s why a special immersion program here at Vanderbilt is so significant.  
Author(s): Vanderbilt News and Communications

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Claude Monet - a Documentary
This is a biography of the famous Impressionist painter, Claude Monet. It is being narrated by a fan of Claude Monet who has studied him for years. A very informational video. (04:01)
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2.3 A closer look at ethical issues

Science can define what is practicable, what can be done, but it cannot determine which developments it is right to pursue; this is largely an ethical judgement. One sensible approach in making an ethical assessment is to try to weigh up the benefits of a technology against its potential to do harm. Deciding whether GM technology is acceptable, in ethical terms, then involves a judgement about the plausibility and moral weight of competing sets of claims. Individuals may make widely different
Author(s): The Open University

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Beaver Nation: Kiyokawa Family Orchards
Hood River has changed through the years. The decline of agriculture in the 1980s brought an increase in tourism and recreation, especially wind surfing and kite boarding. But determined and innovative orchardists like Randy Kiyokawa helped revive agriculture by making their orchards and farms into tourist destinations along 35 miles of scenic highway that’s become known as the Hood River Fruit Loop. More Beaver Nation: http://beavernation.is More with Kiyokawa Family Orchards: http://beavern
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5.1 Common sense revisited

It is worth taking a little time to reflect on what we have discovered so far. Starting from ‘what everybody knows’ about a social problem – or what are sometimes called the common-sense understandings – allows us to see a number of things if we apply the scepticism of being a stranger in our own society.

First, there is a question about whether particular issues are commonly understood to be social problems. As we have seen, there are views which say either that poverty
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2.5.4. Choosing the right words and phrases

Both Philip and Hansa occasionally use words and phrases that don't really do the job they want. We saw, for instance, that Philip uses the word ‘resemblance’ when actually he means ‘contrast’. Here are some other examples from his writing.

Philip's words More accurate words
Paragraph 1‘portrayal
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Thailand mall bomb explosion under investigation
A top police official says investigation is being carried out on the car bomb explosion in Koh Samui that wounded seven people ahead of the water festival in Thailand. Nathan Frandino reports. 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, financ
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Project discussion and partner presentations
Project discussion and partner presentations
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会計情報と資本市場
The objective of this course is to develop the ability to use financial statement information effectively in making economic decisions. A variety of teaching methods including lectures, readings, case assignments, and discussions will be used in this class.
Author(s): TOKYO TECH OCW

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2.61 Internal Combustion Engines (MIT)
This course studies the fundamentals of how the design and operation of internal combustion engines affect their performance, operation, fuel requirements, and environmental impact. Topics include fluid flow, thermodynamics, combustion, heat transfer and friction phenomena, and fuel properties, with reference to engine power, efficiency, and emissions. Students examine the design features and operating characteristics of different types of internal combustion engines: spark-ignition, diesel, str
Author(s): Cheng, Wai

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

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