6 Phylogeny and cladistic analysis

In Section 3.3 the point was made that many physiologists consider that desert birds are successful because of their avian physiology, not because of any specific adaptations. While Williams and Tieleman's research on hoopoe larks demonstrated that desert species are capable of flexibility in metabolic rate and evaporative water loss, it suggested that adaptation is important too. The selective advantages of lowered BMR and TEWL for desert birds include reduced energy demand, and lower produc
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Virtual yeast cell
This rich learning object is used to introduce yeast cytology to students taking Module D24BS3 Brewery Yeast Management as part of the MSc in Brewing Science. The virtual cell permits the students to understand structure and function of yeast organelles.
Author(s): Smart Katherine;Wang Steve

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

FOAMCARP closed cell aluminium foam
Additions such as SiC are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. Calcium carbonate is then added to the melt which is solidified to form a precursor which can be foamed in a controlled manner by a subsequent heat treatment. The resulting foam has a fine and relatively uniform cell structure.
Author(s): D C Curran, Department of Materials Science and Me

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

High magnification SEM image of open cell polyurethane foam
If a gas is injected into a liquid it forms a cellular foam structure. When a thermoset prepolymer of low viscosity is foamed, the polymer can drain from the cell walls (driven by surface tension) before it sets at the cell edges, leaving an open-celled foam. The cell edges have three concave sides, and some remnants of collapsed cell walls can be seen at the cell edges.
Author(s): J A Curran, Department of Materials Science and Me

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

FORMGRIP closed cell aluminium foam
Additions such as SiC are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. 1 to 3 wt% of pre-oxidised titanium hydride is then added to the melt which is solidified to form a precursor which can be foamed in a controlled manner by a subsequent heat treatment. The resulting foam has a relatively fine and uniform cell structure.
Author(s): Dr V Gergely, Department of Materials Science and

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Projectes en xarxa. Experiències. Projecte Sàlix i els sentits

Durada: 6 min. Vídeo. Departament d'Ensenyament (Generalitat de Catalunya).
Aquest vídeo mostra l'experiència que porta a terme l'Escola Riu d'Or de Santpedor amb alumnes d'educació infantil, en el projecte 'Sàlix i els sentits' de la Xarxa Lacenet. text complet</span><br><span class=Author(s):
No creator set

Orchestrating cell separation in plants : what are the risks and benefits?
In this podcast, Professor Roberts from the School of Biosciences discusses his research into the mechanism responsible for regulating cell separation in plants. In particular how plants ‘shed’ parts of themselves such as leaves or fruit. Professor Roberts explores the potential application of his research, through prevention or encouraging of the ‘shedding’ process, agricultural harvests could potentially be increased or even synchronised. Professor Roberts also discusses the resistance
Author(s): Roberts Jerry Professor

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Coarse open celled aluminium foam produced by infiltration of sintered salt (FOAM-U-LIKE)
FOAM-U-LIKE (Foaming of aluminium metal using lightly interconnected kevelled elements) is a very inexpensive route for the production of coarse open celled foams. It allows a reasonable degree of control over cell size and shape, and results in relatively uniform morphology. The interconnectivity of pores can be controlled by varying the degree of sintering of the precursor. In this case, grains of 1-4mm diameter have been sintered at 600 degrees C for just 10 minutes, giving rise to lightly in
Author(s): J A Curran, Department of Materials Science and Me

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

The anatomy cookbook : a dissection guide with recipes
The Anatomy Cookbook has been written to accompany an anatomy and physiology course for bioengineers who would otherwise have missed out on the opportunity to study real organ systems at first hand. It is not an alternative to a standard anatomy text, it acts more as a laboratory supplement. The fun bit is that your kitchen takes the place of the dissection room. Each recipe provides an insight into one or more organs, and all you need to do is go to the supermarket and be prepared to think abou
Author(s): Dr Donal McNally - The University of Nottingham

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

2.1 Degrees of torpor

Adaptive hypothermia occurs in at least six distantly related mammalian orders (Table 1) and in several orders of birds. There is a spectrum running from those species which can tolerate a drop in T b by 2° C for a few hours, to the seasonal deep hibernators which maintain a T b as low as 4° C for weeks on end.


Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

The Siren Song of Cancer Cells
The treatment of complex diseases like cancer may lie in grasping their mechanisms at all levels of biological hierarchy. Most research focuses on understanding how genes cause cancer from within a cell, but much can be learned from intercell interaction.
Author(s): No creator set

License information
Related content

Benefits of the Online Poster Application: Glogster
This short video explains how it is better for the environment to use Glogster to make posters.

Author(s): No creator set

License information
Related content

The physical world: helicopters
Want to learn to fly a helicopter? In this album Royal Berkshire Ambulance pilots show two complete beginners the ropes. Normally, Marie and Tracey dispatch air ambulances, now they find out how to fly one. The five video tracks offer a hands-on explanation of the science and engineering behind helicopter flight. They show how rotors help this tonne of metal take off, change direction and gain speed. They explain the difference between traditional and cutting edge military technology, and demon
Author(s): The iTunes U team

License information
Related content

Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

Tissue movement in bipopulation tumour cord growth
Simulation of tumor cord growth where conversion of the tumor to glycolytic (anaerobic) metabolism takes place under hypoxia. This video shows volume fraction of glycolytic cell population and velocity of tissue movement. Isolines show hypoxia limits for aerobic and anaerobic cell lines respectively. This video reflects work in progress and may be different from the final results.
Author(s): sast

License information
Related content

Rights not set

National Heart, Lung, and Blood Institutes' Diseases and Conditions Index
This site provides information about heart, lung, and blood diseases and sleep disorders. Learn how the heart works. Find out about aneurysms, angioplasty, electrocardiograms, heart attacks, high blood pressure, asthma, cystic fibrosis, sickle cell anemia, insomnia, narcolepsy, and more.
Author(s): No creator set

License information
Related content

Tumor Suppressors - Cell Biology
This is an introductory survey of cell and developmental biology. The assembly of supramolecular structures; membrane structure and function; the cell surface; cytoplasmic membranes; the cytoskeleton and cell motility; the eukaryotic genome, chromatin, and gene expression; the cell cycle; organelle ...
Author(s): David Drubin

License information
Related content

Rights not set

Visualizing the Cytoskeleton - Cell Biology
This is an introductory survey of cell and developmental biology. The assembly of supramolecular structures; membrane structure and function; the cell surface; cytoplasmic membranes; the cytoskeleton and cell motility; the eukaryotic genome, chromatin, and gene expression; the cell cycle; organelle biogenesis, differentiation, and morphogenesis.
Author(s): David Drubin

License information
Related content

Rights not set

General Biology Fall 2008
This course is a general introduction to cell structure and function, molecular and organism genetics, animal development, form and function.
Author(s): Richard MalkinRobert L. FischerGary L. FirestoneMi

License information
Related content

Rights not set

Zebra fish blood stream to heart
Arteries, veins and the heart are the organs that make up the circulatory system, an organ system. Organs are made up of several types of tissues.
Author(s): No creator set

License information
Related content

Zebrafish embryo development
Early development of Danio eggs – note the internal structure and the cluster of eggs (note the large yolk attached to the two-cell egg). The cells all divide at the same time. Within two days this mass of dividing cells will take on the shape of a zebrafish larvae.
Author(s): No creator set

License information
Related content