Active galaxies

Figure 10 shows the spectral energy distribution of an active galaxy.

Figure 10
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3.7 Protein phosphatases

Together with inositolphospholipid phosphatases, protein phosphatases are key regulators of signal transduction pathways. Like protein kinases, protein phosphatases are either tyrosine phosphatases (the majority of protein phosphatases, some of which are shown in Figure 44) or serine–threonine phosphatases (including the phosphoprotein phos
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Model of the monoclinic ZrO2 unit cell
Rotating model of the monoclinic ZrO2 unit cell.
Author(s): DoITPoMS, University of Cambridge

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Acknowledgements

Grateful acknowledgement is made to the following sources for permission to reproduce material in this course:

Couse image: Mike in Flickr made available under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence.

The content acknowledg
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3.4 Second messengers

In the previous section, we have discussed the principles of second messengers (Section 1.5) and, in particular, those produced by PLC (IP3 and DAG) and PI3 kinase (PI(3,4)P2 and PI(3,4,5)P3). We shall now consider the roles and mechanisms of action of the other chief mediators, which are Ca2+ ions, cAMP and cGMP
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9.1 The psychological arena

The examples in the previous section followed the traditional medical approach, namely that there is a disease, it can be diagnosed (identified), and the cause of the disease, be it viruses, bacteria, pathogens, genes or poisons, can be sought. This section moves away from the medical arena and into the psychological arena, where the symptoms are behavioural. In this case, the symptoms are socially unacceptable behaviour and to the list of causes just mentioned is added family circumstances a
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A Jewish soldier from Eretz Israel in the British Army, describes meeting survivors in Italy
http://www.yadvashem.org/yv/en/exhibitions/dp_camps_italy/index.asp The exhibition “DP Camps and Hachsharot in Italy after the War”, brings the story of the many thousands of Holocaust survivors in the dozens of DP camps that operated in Italy after World War II. While these camps served as temporary transit stations for the survivors, it was there that they also started to cope with the enormity of their loss, at the same time preparing themselves for a new chapter in their lives with the
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7.06 Cell Biology (MIT)
This course deals with the biology of cells of higher organisms: The structure, function, and biosynthesis of cellular membranes and organelles; cell growth and oncogenic transformation; transport, receptors, and cell signaling; the cytoskeleton, the extracellular matrix, and cell movements; chromatin structure and RNA synthesis.
Author(s): Ploegh, Hidde,Orr-Weaver, Terry

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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

Purdue Day of Giving Krannert Challenge
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2.7 Geological problems in coal mines

A modern coalface is a very complex operation that represents a large investment in terms of capital, labour and planning. Cutting machines and lengthy conveyors are inflexible and require uniform geological conditions to maximize output. What then are the effects of geological variations on such a mining system?

Geological factors control the selection of working areas. The two principal geological conditions that affect mining operations are, first, the nature of the coal-bearing rock
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Fe, C 1.0 (wt%), hypereutectoid alloy
This secondary electron SEM image shows the cementite delineating prior austenite grain boundaries with a thin layer. The amount of proeutectoid phase is very low, with the majority of the area being taken by the pearlite eutectoid. Again each pearlite cell has a different orientation with the ferrite phase being selectively etched.
Author(s): DoITPoMS, University of Cambridge,Prof T W Clyne,

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5 Conclusion

Domesticated organisms evolve in artificial environments under artificial selection, and opportunistic or enforced hybridisation often occurs between species that would not normally interbreed. Natural selection cannot be eliminated and continues to operate. At least two different forms of dwarfism are common in domesticated livestock and humans, but only the rarer midget type of dwarfism occurs in wild lineages. Domesticated mammals and birds have distinctive patterns of skin pigmentation th
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6.5 Summary of Section 6

Growth cones respond to proximal and distal cues. The proximal cues in the extracellular matrix or other cells affect adhesion and result in chemotactic guidance. Distal cues are also in the extracellular matrix but they diffuse through it and result in the growth cone either moving towards the source (attractants) or away from it (repellants). These distal cues are chemotropic cues and can have different effects on different growth cones; what may be an attractant to one growth cone may be r
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Native American Portraits
This is a video of portraits of the famous Native Americans of history: Powhatan, Pontiac, Tecumsah, Sequoiya, Sitting Bull, Red Cloud, Crazy Horse, Geronimo, Joseph, Jack, and others. However, the people are not identified. Music is "Mountain" Apache Song & Drogo's Pan Ethnic Quintet. (02:20)
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The Writing Process: You Can't Write Well Without It PowerPoint
This PowerPoint presentation is a review of the steps in the writing process.  It talks about prewriting, brainstorming, outlining, drafting, word choices, revising, proofing, and presenting.  This video itself is quite simple, but the information presented is very thorough.
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2.2.1 Mechanics and determinism

It is probably fair to say that no single individual has had a greater influence on the scientific view of the world than Isaac Newton. The main reason for Newton's prominence was his own intrinsic genius, but another important factor was the particular state of knowledge when he was, in his own phrase, 'in the prime of my age for invention'.

In 1543, a century before Newton's birth. Nicolaus Copernicus launched a scientific revolution by rejecting the prevailing Earth-centred view of t
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4.7 Build prototype/demonstrator

The physical models we talked about earlier are prototypes or demonstrators of a sort. However, for the purposes of making a clear distinction in the process, I'm referring here to prototypes or demonstrators as functioning preliminary models of the essential finished product or construction or service, bringing together all the elements of the design that may or may not have been previously physically tested (Author(s): The Open University

Up Close: Casey Coffman
The Senior Vice President, Corporate Strategy and Development for The Madison Square Garden Company discusses how sport and entertainment are closely knit, her leadership style, and her vision of how technology will influence the future of sport.