Monday, 27 July 2015

artifical skin

                                                       Artificial Skin (1981)         
Human skin is a marvel of is tough yet stretchy and pliable,and acts as an impermeable Barrier against water loss, infection,and cell damage from the sun's ultraviolet(UV)rays.with this Range of properties,it is a very difficult material to duplicate.

John f. Burke, a surgeon at Massachusetts general hospital in the united states,was looking for the Reliable skin replacement for the treatment of burn is usually grafted from other parts of The patient's body, but in cases where the burns cover 50 Percent or more of the body,often there is Not enough healthy skin to cover the damaged area.

In the 1970 Burke teamed up with loannis V. Yannas, a chemistry professor at Massachusetts institute Of technology (MIT), who was studying a stretchy protein called collagen that naturally occurs in Animal tendons. Burke and Yannas combined collagen fibers taken from cowhide with long sugar Molecule from shark cartilage to create a Gridlike polymer membrane. they dried this membrane and Stuck it onto a layer of viscous plastic.

      The two layer, about as thick as a paper towel, offer against infection and dehydration while Acting as a scaffold on which new skin cells can grow. as a patient's skin grows back, the artificial Membrane breaks down naturally and can be peeled away. the new skin is not scarred and looks like Normal skin, albeit without sweat glands or hair follicles.

        In 1981 Burke and Yannis proved that their artificial skin worked on patient with 50 to 90 Percent Burns, vastly improving their chances of recovery.

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