UK Minister on latest unemployment figures
Dec. 12 - Minister for Employment, Mark Hoban, gives his outlook for the UK jobs market and reaction to the latest figures.
4.4.2 Phosphate stripping It has been estimated that up to 45% of total phosphorus loadings to freshwater in the UK comes from sewage treatment works. This input can be reduced significantly (by 90% or more) by carrying out phosphate stripping. The effluent is run into a tank and dosed with a product known as a precipitant, which combines with phosphate in solution to create a solid, which then settles out and can be removed. It is possible to use aluminium salts as a precipitant, but the resulting sludge contains tox
Learning outcomes By the end of this unit you should be able to: understand more about the science that underlies the development of genetically modified organisms and in particular how gene transfer is brought about; know something of the potential benefits and uncertainties associated with gene transfer and the high levels of technical ingenuity involved; be better able to understand the science that underpins the development of Golden Rice and understand why the u
2.2 Receptor specificity Binding of an extracellular signal to its receptor involves the same type of interactions as those between an enzyme and its substrate. Receptor specificity depends on the binding affinity between the ligand and the binding site on the receptor. The dissociation constant (KD) describes the affinity between receptors and their ligands. Proteins can be thought of as consisting of various domains, and the different combinations of structural motifs in the extracellular re
1.5.7 The signed area under a general velocity–time graph We have already seen (in Section 3.6) that in the context of uniform motion, the signed area under a particle's velocity–time graph, between two given times, represents the change in the particle's position during that time interval, with a positive area corresponding to displacement in the positive direction. In the
Acknowledgements The following material acknowledged below is Proprietary and used under licence and not subject to Creative Commons licence (see terms and conditions). Grateful acknowledgement is made to the following sources for permission: Rothery, David A., Teach Yourself Planets, Chapter 6, pp. 66–75, Hodder Education, 2000, 2003. Copyright © David Rothery. Figures from
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Introduction This unit is an introduction to chemistry concepts, using water as the main illustration. Much of the unit is devoted to exploring the smallest water particle – a water molecule – what it is and how it gives rise to the particular properties of water. The unit also explains powers of ten and scientific notation, which are a convenient way of expressing both very large and very small numbers. It is a good introduction to science.
8 Multiple plate collisions and the end of the Iapetus Ocean The document attached below includes the eighth section of Mountain building in Scotland. In this section, you will find the following subsections: 8.1 Introduction 8.2 Palaeocontinental reconstructions 8.2.1 The global view 8.2.2 A model for the closure of the Iapetus Ocean 8.2.3 Summary of Section 8.2 8.3 Tectonics of the Northe
2.2 Vitamin A Look back at Table 1 and identify the foods that contain vitamin A. On the basis of this information, try to predict where vitamin A is stored in the human body. Acknowledgements Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence All other materials included in this unit are derived from content originated at the Open University. 1. Join the 200,000 studen 1.4.2 The functional group approach It is the classification of functional groups that simplifies the study of organic chemistry (the chemistry of compounds that contain carbon). With many millions of known organic compounds, and more being added by the day, it would be hopeless if their properties could not be systematised in some way. It turns out that a given functional group usually has the same chemical properties whatever carbon chain it is bonded to, so once the general properties of each functional group are known, all 1.4.1 Salicylic acid The structural formula of salicylic acid, 2.1, looks quite complicated. However, it becomes less daunting if you unpack it a bit. One of the first things to do when confronted with an unfamiliar structure is to check that all the valencies are correct (four for carbon, two for oxygen and one for hydrogen). If any atoms have the wrong valency, it follows that there is a mistake somewhere and the molecule does not exist as drawn. It looks OK for the structure of salicylic acid. You proba 1.2.4 Fertilization Now that we have considered the production of gamete cells, including the process of meiosis, we can examine the next stage of reproduction, the process of fertilization, which occurs inside the female's reproductive tract. As fertilization occurs, the successful sperm stops swimming and a change takes place in the egg cell membrane, which prevents any other sperm from fusing with it. The nucleus of the sperm cell is injected into the cytoplasm of the egg cell. The chromosomes of the fertiliz Optional reading Debates about the relationship between science, citizenship and democracy continue to influence public policies related to science communication and public engagement in science. In part, these debates involve discussions about scientific and other ways of knowing. For an introduction to these issues, see Irwin (1999). This premise, of exchanging information and learning from others, is also relevant to your communication with other expert scientists. As a research student you will lear 5.3.3 Torus with 1 hole In our last example, we consider a pentagon with two pairs of edges identified. As we saw in Section 2.3, identification of the edges produces a torus with a hole. In this case there are five vertex-neighbourhoods to fit together, as shown in Author(s): 5.2.1 Proof We check that Tf satisfies conditions (T1)–(T3) for a topology.
Since (T1)–(T3) are satisfied, Tf is a topology on I(X). Thus (I(X),Tf) is a topological space. We give the topology Tf a sp 5.1 Identifying edges of a polygon In this section, we revisit the construction of surfaces by identifying edges of polygons, as described in Section 2. Recall that, if we take any polygon in the plane and identify some of its edges in pairs, then we obtain a surface. When specifying how a given pair of edges is to be identified, we choose one of the two possible re 4.3 The Euler characteristic Subdivisions of surfaces lead to the third number used to classify surfaces, the Euler characteristic. The Euler characteristic χ of a subdivision of a surface is 3.3 The projective plane We now consider one of the most important non-orientable surfaces – the projective plane (sometimes called the real projective plane). In Section 2 we introduced it as the surface obtained from a rectangle by identifying each pair of opposite edges in opposite directions, as shown in Understanding the environment: Flows and feedback
Activity 4
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There is increasing recognition that the reductionist mindset that is currently dominating society, rooted in unlimited economic growth unperceptive to its social and environmental impact, cannot resolve the converging environmental, social and economic crises we now face. The primary aim of this unit is to encourage the shift away from reductionist and human centred thinking towards a holistic and ecological worldview.Author(s):
