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4.2 Selecting the sex of a child

Once a pregnancy has been established, many couples are anxious to know the sex of their unborn baby. The reasons for this are many, ranging from the prosaic (will the baby be able to use its brother's or sister's old clothes) to the deeply religious (as described for Hindus in Section 2). In many communities there is so much social pressure on mothers to produce the ‘right’ sex (usually male) that infanticide of the ‘wrong’ sex is widely practised. Because this is illegal in most soc
Author(s): The Open University

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Stem cells: the future of medicine?
Dr Adam Giangreco views stem cell research as the best promise for medical breakthroughs over the next few decades. Dr Giangreco, a recent recipient of a major European Research Council grant, explains how he is exploring new treatments for lung damage and why funding stem cell research is so vital. 6 October is International Stem Cell Awareness Day. UCL Centre for Stem Cells and Regenerative Medicine: http://www.ucl.ac.uk/stemcells/ For UCL lectures on stem cell research (link to iTunesU): http
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SEM image of Velcro (TM)
Velcro is a system of hard polymer hooks and soft nylon loops, both woven into backing fabric. Inspired by the natural seed propagation mechanism used by some plants in the form of 'burrs', Velcro was invented in Switzerland in 1948 by George de Mestral. [...]
Author(s): J A Curran, Department of Materials Science and Me

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The Will of the People
What did the founders really intend for our democracy? Political Science Professor Quentin Kidd talks about how the government was built and how Americans have adapted it.Author(s): No creator set

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Study Finds Commercial Organic Farms Have Better Fruit and Soi
PULLMAN, Wash.—Side-by-side comparisons of organic and conventional strawberry farms and their fruit found the organic farms produced more flavorful and nutritious berries while leaving the soil healthier and more genetically diverse. "Our findings have global implications and advance what we know about the sustainability benefits of organic farming systems," said John Reganold, Washington State University Regents professor of soil science and lead author of a paper published today in the peer
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Chemical and Environmental Behaviour of Materials: Fuel Cells
This set of animations demonstrates the principles of a solid oxide fuel cell and a proton exchange membrane cell. From TLP: Fuel Cells
Author(s): Derek Fray, University of Cambridge,Steve Mounsey,

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The Ride
Fly with explore over the Hawaiian Islands. Experience the breathtaking beauty of the mountains' cascading waterfalls; watch humpback whales splash offshore; see surfers hitch rides on some of the best waves on the planet. Run time 05:01.
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Patri Friedman on Seasteading
Patri Friedman, Executive Director of the Seasteading Institute, talks with EconTalk host Russ Roberts about seasteading, the creation of autonomous ocean communities as an alternative to existing political and cultural forms. Topics discussed include the political and economic viability of seasteading, risks of piracy, the aesthetics of living on the ocean, and the potential impact of seasteading on conventional governments.
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Fidafrique

thumbnailFIDAFRIQUE is a rural development and poverty reduction network in Western and Central Africa network. The website contains a number of reports and presentations on rural and agricultural reasearch and development in the area. Topics covered include
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Relevance of Organic Dairy Cattle Breeding


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pdfPresentation by Bio Institut - lfz Raumberg-Gumpenstein, Styria, Austria
creative commons license
pdfMobility is a central attribute of modern societies. It has fundamental importance for people´s quality of life, as well as for the population in rural areas. How will mobility develop in the future? Participating in the rapidly evolving life forms? Will urban and rural are
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Economic Strategies for Organic Family Farms in Austria

pdfOrganic holdings in Austria are organized primarily as family farms. This means that an internal system consisting of family, business and household faces an external system consisting of cultural, social, economic and political conditions. Within and between the two systems
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Screencast on multiplying Fractions with whole numbers
Examples of multiplying Fractions with whole numbers
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Chapter 20
Corporations Table of Contents: 00:00 - Chapter 20 00:10 - Nature and Classification 00:36 - Corporate Personnel 01:05 - Limited Liability of Shareholders 01:22 - Corporate Earnings and Taxation 01:53 - Torts and Criminal Acts 02:14 - Classification of Corporations 02:44 - Close Corporations 03:21 - "S" Corporations 03:53 - Formation and Powers 04:02 - Promotional Activities 04:25 - Incorporation Procedures 04:50 - First Organizational Meeting 05:12 - Improper Incorporation 06:13 - Corporate
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Here We Are Now (Entertain Us): Location, Mobile, and How Data Tells Stories
Location-based services and context-aware technologies are altering the way we encounter our environments and producing enormous volumes of data about where we go, what we do, and how we live and interact. How are these changes transforming the ways we engage with our physical world, and with each other? What kind of stories does the data produce, and what do they tell us about our culture and social behaviors? What opportunities and perils does this information have for businesses and individua
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2.1 Introduction

In all the analysis of stellar properties discussed so far we have made an implicit assumption - that light emitted by a star is not changed between its emission and its arrival outside the Earth's atmosphere, except by the inverse square law (i.e. it is reduced by a factor of d2, where d is the distance to the star) and by the Doppler effect. However, this may not be the case.

Author(s): The Open University

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Douglas Melton, Harvard University: "Stem Cell Challenges in Biology and Public Policy" - April 10,
Douglas Melton will discuss the biology and public policy challenges surrounding stem cell research. The potential of human embryonic stem cells for understanding human development and finding new therapies will be presented. Dr. Melton is a cell and molecular biologist as well as an advocate of embryonic stem cell research. His research focuses on the developmental biology of the pancreas. One of the primary goals of his work is to understand how human embryonic stem cells differentiate into pa
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Mycotoxins in Cereals: How to Avoid?

pdfMycotoxins are not a particular problem in organic farming, they can be reduced by various measures on field and in store. (FIBL-Suisse fact sheet)
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Virtual laboratories in Molecular and Cell Biology - Immuno-electron-microscopy
A virtual laboratory that includes immuno-gold labelling and transmission electron micrography (immuno-EM). It allows the student to study intracellular-traffic pathways of two cell-surface receptor molecules, following stimulation of the cells with their specific ligand, for different time periods. The programme first introduces the theory underlying the techniques and includes a video of EM work in a real laboratory. The student is then taken through a series of questions which requires them t
Author(s): David Male, Ignacio Romero, Jane Loughlin - The Op

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Virtual laboratories in Molecular and Cell Biology - SDS-PAGE
A protein analysis laboratory using SDS-PAGE, western-blotting and endoprotease digestion. The programme includes a section on the theory of the techniques, a video demonstration in a real laboratory, and a series of questions which guide the students through the structural analysis of model proteins (3 are included). Students go to the virtual laboratory and devise their own experiments in order to determine the molecular weight, subunit composition etc of the proteins. Results (gels and blots)
Author(s): David Male, Ignacio Romero, Jane Loughlin - The Op

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