5.3 Mitochondrial adaptations

During the winter months, whilst hibernating vertebrates maintain a very low metabolic rate, major reorganization of mitochondrial metabolism occurs. The phenomenon has been studied in some detail in frogs which, although not hibernators in the true sense, can endure very low water temperatures under the conditions of profound hypoxia that exist when they lie dormant for long periods below the surface. In contrast to normoxic conditions, the muscle mitochondria of dormant frogs depress their
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STS.011 American Science: Ethical Conflicts and Political Choices (MIT)
We will explore the changing political choices and ethical dilemmas of American scientists from the atomic scientists of World War II to biologists in the present wrestling with the questions raised by cloning and other biotechnologies. As well as asking how we would behave if confronted with the same choices, we will try to understand the choices scientists have made by seeing them in their historical and political contexts. Some of the topics covered include: the original development of nuclea
Author(s): Foley, Brendan

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2.3 Environmental regulation of breeding

As pointed out in Section 1.1, primary plant productivity occurs for only a few months in the summer, so the reproductive physiology of most arctic animals, particularly herbivorous species, is tightly synchronized with the seasons. On Svalbard (Figure 2b), more than 90% of the reindeer fawns are born in the first week of J
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Romanticism in the American Short Story
Power point presentation about Romanticism in the American short story. This presentation explains the literary movement known as romanticism and authors such as Nathaniel Hawthorne, Edgar Allan Poe, and Washington Irving from that era. 
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HST.722J Brain Mechanisms for Hearing and Speech (MIT)
An advanced course covering anatomical, physiological, behavioral, and computational studies of the central nervous system relevant to speech and hearing. Students learn primarily by discussions of scientific papers on topics of current interest. Recent topics include cell types and neural circuits in the auditory brainstem, organization and processing in the auditory cortex, auditory reflexes and descending systems, functional imaging of the human auditory system, quantitative methods for relat
Author(s): Delgutte, Bertrand,Caplan, David N.,Guenther, Fran

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2.3.2 Fast breeder reactors

If fast neutrons produced in the chain reactions are not moderated or absorbed, the rate of conversion of uranium-238 into plutonium-239 (Equation 3) can exceed the fission rate of plutonium-239. Reactors that use fast neutrons in this way are called fast breeder reactors.

Their main fuel is
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3.2 Uranium occurrence and ore deposits

In igneous rocks, uranium is more abundant in granites (~3.5 ppm) than in basalts (~1 ppm). The large size of the uranium atom prevents it from easily entering the structures of common rock-forming minerals, so it is an incompatible element that tends to remain in magmas until a late stage of crystallisation, when it enters minor minerals, or even the uranium oxide, uraninite (UO2). In suitable circumstances, following fractional crystallisation of uranium-rich granitic magm
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2010 Kohn Lecture Series - Cell cycle control
2010 Kohn Lecture Series - Cell cycle control
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Virtual Maths, Shapes, Space and Measure, Demonstration of a Theodolite Survey in action
Using a theodolite to calculate the height of a building, demonstration 'in the field', includes interactive simulation tools and formulae
Author(s): Leeds Metropolitan University

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Learning outcomes

After studying this course, you should be able to:

  • explain the meanings of the newly defined (emboldened) terms and symbols, and use them appropriately

  • distinguish between perfect conduction and perfect diamagnetism, and give a qualitative description of the Meissner effect

  • explain how observation of a persistent current can be used to estimate an upper limit on the resistivity of a superconductor, and perform calculations related to such estimates<
    Author(s): The Open University

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7.8 Summary of Section 7

This section has sought to illustrate the formation of connections between neurons and their targets by exploring a few examples. The picture that emerges is one of cells at different stages of development subjected to a vast array of signals. These signals are the medium through which environmental factors exert their effects. To some of these signals, some cells respond; to other signals, other cells respond. What a cell, a neuroblast, a growth cone actually does is dependent on the combina
Author(s): The Open University

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18.417 Introduction to Computational Molecular Biology (MIT)
This course introduces the basic computational methods used to understand the cell on a molecular level. It covers subjects such as the sequence alignment algorithms: dynamic programming, hashing, suffix trees, and Gibbs sampling. Furthermore, it focuses on computational approaches to: genetic and physical mapping; genome sequencing, assembly, and annotation; RNA expression and secondary structure; protein structure and folding; and molecular interactions and dynamics.
Author(s): Lippert, Ross

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20.440 Analysis of Biological Networks (BE.440) (MIT)
This class analyzes complex biological processes from the molecular, cellular, extracellular, and organ levels of hierarchy. Emphasis is placed on the basic biochemical and biophysical principles that govern these processes. Examples of processes to be studied include chemotaxis, the fixation of nitrogen into organic biological molecules, growth factor and hormone mediated signaling cascades, and signaling cascades leading to cell death in response to DNA damage. In each case, the availability o
Author(s): Essigmann, John,Sasisekharan, Ram

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Socially Responsible Investing
The Center for Leadership Ethics presented the 2014 Executive Ethics Symposium August 29, 2014 at The Lodge on the Desert
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Radio Lingua Network News: 5 September 2008
The latest news from Radio Lingua including details of Coffee Break Spanish arrangements, new podcasts launched this autumn and the Radio Lingua video contest in which you can win an iPod.
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Husky Football Legend Napoleon Kaufman
Get caught up with the UW's all-time rushing yards leader, Napoleon Kaufman - from his time as part of the Husky national championship team, through his pro football career, to his current role as a senior pastor for the Well Christian Community Church in Livermore, California. Napoleon Kaufman, former Husky football player, senior pastor, Well Christian Community Church 04/26/2015 uwtv.org/uw360
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3.5.1 Final arousal

Emergence can be viewed as the final step in the series of periodic arousals. Instead of re-entering hibernation, the animal maintains the euthermic condition. The cue for maintaining this final arousal is probably not temperature, as some species emerge when T a is well below zero. It is also difficult to see how arousal could be affected by daylength, since the hibernating animal is usually underground in a cavity or a burrow. Perhaps fat or food stores reach a minimum lev
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Las células eucariotas
OpenStax College
Al final de esta sección serás capaz de: Describir la estructura de las células (eucariotas) de plantas y animales. Puntualizar el papel de la membrana plasmática. […]

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An introduction to energy resources

Understanding energy resources involves considering all types of energy source from various sci
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LSE Festival 2018 | The Future of Ageing [Audio]
Speaker(s): Professor Rebeca Aldunate, Nicci Gerrard, Professor Michael Murphy, Jane Vass | With the average life expectancy increasing from 66.7 in 1942 to 81.25 in 2017, and set to continue, population ageing is poised to become one of the most significant social transformations of the 21st century. This panel discusses how ageing could come to dominate the giant issue of health and social care, and potentially all areas of the welfare state. Rebeca Aldunate is Director of the Biotechnology Sc
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