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Eric Scerri wrote:
Please see my new periodic Table - Element, etc. website
comments and suggestions welcome
Wed Sep 14 03:46:31 UTC 2011
Katherine Wilkinson wrote:
Abdominal organ donation after death - Your View
We thank Mr. Clancy for his comments and agree that using uncontrolled donors who present solely to air ambulance teams neglects a large proportion of potentially suitable donors.
However, with the current minimal contribution of uncontrolled donation after circulatory death within the United Kingdom, the model as described (1) has logistical and financial advantages. The aim of the published project was to rekindle interest in uncontrolled donation within the UK without overestimating its potential.
There are considerable challenges that face uncontrolled donation. These centre on limiting ischaemic injury, obtaining consent and retrieving the organs. Following death potential donors must be rapidly identified and temporary continuation of organ perfusion commenced by means of continuous chest compressions and extracorporeal membrane oxygenation (ECMO); the resource and ethical implications of implementing this strategy within every hospital with an emergency department are clear (2). Obtaining consent from the newly bereaved family and the coroner is difficult and should be handled by trained personnel. Surgical teams must be capable of complex multi-organ retrieval procedures that include the running of equipment such as ECMO. For these reasons, within contemporary financial constraints, the presented method would be cost effective by concentrating donation at a small number of centres and could utilise existing organ retrieval teams. A widespread national program of uncontrolled donation may be a second step but would be labour intensive, expensive, have a low yield of successful donors and furthermore do little to provide organs other than kidneys for transplantation.
Uncontrolled donation is potentially useful but is not the panacea to the shortfall of donor organs within the UK.
Paolo Muiesan & Keith Roberts
Liver Transplantation & HPB Surgery
Queen Elizabeth Hospital
1. Roberts K, Bramhall S, Mayer D, Muiesan P. Uncontrolled organ donation following pre-hospital cardiac arrest: a potential solution to the shortage of organ donors in the United Kingdom? Transpl Int. 2011;24(5):477-81
2. Nicholson ML, Dunlop P, Doughman TM, Wheatley TJ, Butterworth PC at al. Work-load generated by the establishment of a non-heart beating kidney transplant programme. Transpl Int. 996;9(6):603-6.
Tue Sep 13 16:39:35 UTC 2011
What is the science behind the computer generated image of tracking the ball? Some type of sensors in the ground?
Sat Sep 10 19:45:22 UTC 2011
A great assessment. Let's also not forget the price we paid with the curbing of civil liberties and the way that it was exploited to initiate the Iraq War. Check out this great timeline that collects some of the best coverage of 9/11 over the past ten tears: http://www.democracynow.org/blog/2011/9/9/the_9-11_decade_voices_of_dissent_on_democracy_now
Fri Sep 09 17:06:10 UTC 2011
Jess Tauber wrote:
Oxidation patterns and the Golden Ratio?
I've been looking over the known set of oxidation states of the elements, and there are several interlocking patternings when the system is considered as a whole. One of the more interesting is the spread of states. No element has more than a width of 11 (Lucas numberhood relevant?). And the total range over which elements can occur is from -4 to +8, a total of 13 (Fibonacci?) positions, when 0 is included. Is there more to this? And why is oxidation favored over reduction with regard to possibilities, by a two-to-one margin? Is this also some sort of Lucas relation? That is what happens with dimensionalities in String Theory- they follow the Lucas order quite closely. And remember that Fibonacci and Lucas numbers are neither randomly nor arbitrarily placed as atomic numbers in the Periodic System. For ground states Lucas positions are almost all where one has either half or completely filled orbitals. It has been claimed by others that Fibonacci and Lucas numbers show up in stoichiometry. Might the oxidation relations be the flip side to this???
Thu Sep 08 18:59:41 UTC 2011
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