http://defensetech.org/2005/11/10/army-wants-synthetic-gills/ The Future of the Military, Law Enforcement and National Security Thu, 24 May 2012 18:26:39 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://defensetech.org/2005/11/10/army-wants-synthetic-gills/#comment-193670 Euan Hawthorn Wed, 03 Feb 2010 09:31:36 +0000 http://deftech.usmilblog.com/?p=1764#comment-193670 water proof tit tape water proof
tit tape

]]> http://defensetech.org/2005/11/10/army-wants-synthetic-gills/#comment-114414 steve Sun, 11 Feb 2007 05:13:05 +0000 http://deftech.usmilblog.com/?p=1764#comment-114414 what about that oxygenated liquid, similar to that in the movie the Abyss. what about that oxygenated liquid, similar to that in the movie the Abyss.

]]> http://defensetech.org/2005/11/10/army-wants-synthetic-gills/#comment-12477 Joel H. Sat, 21 Jan 2006 19:21:28 +0000 http://deftech.usmilblog.com/?p=1764#comment-12477 hey about these gills: can't we take a living fish and transfer the membrane out of it to a machine? hey about these gills:
can’t we take a living fish and transfer the membrane out of it to a machine?

]]> http://defensetech.org/2005/11/10/army-wants-synthetic-gills/#comment-12476 TargetDriver Sat, 12 Nov 2005 18:11:49 +0000 http://deftech.usmilblog.com/?p=1764#comment-12476 ...how does Aqua Girl keep her top on when she's swimming that fast? …how does Aqua Girl keep her top on when she’s swimming that fast?

]]> http://defensetech.org/2005/11/10/army-wants-synthetic-gills/#comment-114413 TargetDriver Sat, 12 Nov 2005 18:07:25 +0000 http://deftech.usmilblog.com/?p=1764#comment-114413 Has anybody considered that to compete with the efficiency of a compressed air cylinder that under ideal conditions (oxygen saturated, 0C water) you'd have to process about 7000 gallons of water per hour at 100% efficiency) to yield the same amount of oxygen contained in an 80ft air tank? Who thinks that a portable battery is going to be up to that challenge? Has anybody considered that to compete with the efficiency of a compressed air cylinder that under ideal conditions (oxygen saturated, 0C water) you’d have to process about 7000 gallons of water per hour at 100% efficiency) to yield the same amount of oxygen contained in an 80ft air tank?
Who thinks that a portable battery is going to be up to that challenge?

]]> http://defensetech.org/2005/11/10/army-wants-synthetic-gills/#comment-114412 L. Perg Fri, 11 Nov 2005 00:55:24 +0000 http://deftech.usmilblog.com/?p=1764#comment-114412 The contraption that your reader linked to uses a centrifuge, powered by a two-pound lithium battery with a theoretical one-hour life. Think about how often your laptop/ipod/cell phone/camera battery has quit unexpectedly - especially in cold conditions - and you want to take that diving? From reading the short abstract provided on the DoD website, the researchers are copying fish to develop the most efficient membrane folding for an artificial gill. Since a passive exchange through a semi-permeable membrane would require too large an area to be practical, they are also working on an artificial means of enhancing oxygen transfer (seems possible, since artificial hemoglobin-like compounds have been developed). The contraption that your reader linked to uses a centrifuge, powered by a two-pound lithium battery with a theoretical one-hour life. Think about how often your laptop/ipod/cell phone/camera battery has quit unexpectedly — especially in cold conditions — and you want to take that diving?
From reading the short abstract provided on the DoD website, the researchers are copying fish to develop the most efficient membrane folding for an artificial gill. Since a passive exchange through a semi-permeable membrane would require too large an area to be practical, they are also working on an artificial means of enhancing oxygen transfer (seems possible, since artificial hemoglobin-like compounds have been developed).

]]> http://defensetech.org/2005/11/10/army-wants-synthetic-gills/#comment-114411 Willy Volk Thu, 10 Nov 2005 15:58:04 +0000 http://deftech.usmilblog.com/?p=1764#comment-114411 An Israeli inventor named Alon Bodner has already developed a new "tankless" scuba system in which users experience increased maneuverability. European patents have already been granted; approval is pending in the US. http://www.divester.com/2005/06/02/inventing-scuba-gear-is-tankless-work/ http://www.divester.com/2005/06/07/more-on-bodners-tankless-scuba-system/ An Israeli inventor named Alon Bodner has already developed a new “tankless” scuba system in which users experience increased maneuverability. European patents have already been granted; approval is pending in the US.
http://www.divester.com/2005/06/02/inventing-scuba-gear-is-tankless-work/
http://www.divester.com/2005/06/07/more-on-bodners-tankless-scuba-system/

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