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New American Chemical Society podcast: Tiny sea creature and a new medical adhesive
October 28, 2009Scientists questing after a long-sought new medical adhesive describe copying the natural glue secreted by a tiny sea creature called the sandcastle worm in the latest episode in the American Chemical Society's (ACS) award-winning podcast series, "Global Challenges/Chemistry Solutions."
Such an adhesive is needed to repair bones shattered in battlefield injuries, car crashes and other accidents.
The traditional method of repairing shattered bones involves use of mechanical fasteners like pins and metal screws to support the bone during healing. But achieving and maintaining alignment of small bone fragments using screws and wires is challenging, according to researchers, who presented their study results at the ACS' 238th National Meeting in Washington, D.C.
The podcast is available without charge at iTunes and from ACS at www.acs.org/globalchallenges.
It features audio clips of Russell Stewart, Ph.D., a bioengineer at the University of Utah in Salt Lake City. Stewart says this synthetic glue is based on complex coacervates, an ideal but so far unused method for making injectable adhesives. Coacervates are tiny spherical droplets of assorted organic molecules (specifically, lipid molecules) that are held together by hydrophobic forces from a surrounding liquid.
He explains that the idea of using natural adhesives in medicine is an old one dating back to the first investigations of mussel adhesives in the 1980s. Yet almost 30 years later there are no adhesives based on natural adhesives used in the clinic.
American Chemical Society
The podcast is available without charge at iTunes and from ACS at www.acs.org/globalchallenges.
It features audio clips of Russell Stewart, Ph.D., a bioengineer at the University of Utah in Salt Lake City. Stewart says this synthetic glue is based on complex coacervates, an ideal but so far unused method for making injectable adhesives. Coacervates are tiny spherical droplets of assorted organic molecules (specifically, lipid molecules) that are held together by hydrophobic forces from a surrounding liquid.
He explains that the idea of using natural adhesives in medicine is an old one dating back to the first investigations of mussel adhesives in the 1980s. Yet almost 30 years later there are no adhesives based on natural adhesives used in the clinic.
American Chemical Society
Adhesives Current Events and Adhesives News RSSCommon plants can eliminate indoor air pollutants
Air quality in homes, offices, and other indoor spaces is becoming a major health concern, particularly in developed countries where people often spend more than 90% of their time indoors.
Spider web glue spins society toward new biobased adhesives
With would-be goblins and ghosts set to drape those huge fake spider webs over doorways and trees for Halloween, scientists in Wyoming are reporting on a long-standing mystery about real spider webs: It is the secret of spider web glue.
Friction force differences could offer a new means for sorting and assembling nanotubes
Nanotubes and nanowires are promising building blocks for future integrated nanoelectronic and photonic circuits, nanosensors, interconnects and electro-mechanical nanodevices. But some fundamental issues remain to be resolved - among them, how to position and manipulate the tiny tubes.
Bioavailable contaminants come from the Exxon Valdez oil catastrophe
Contaminants from natural coal deposits in the Gulf of Alaska are not easily bioavailable, unlike the crude oil from the Exxon Valdez tanker catastrophe.
The invasive green mussel may inspire new forms of wet adhesion
The green mussel is known for being a notoriously invasive fouling species, but scientists have just discovered that it also has a very powerful form of adhesion in its foot, according to a recent article in the Journal of Biological Chemistry.
Nanotechnology may increase longevity of dental fillings
Tooth-colored fillings may be more attractive than silver ones, but the bonds between the white filling and the tooth quickly age and degrade.
Plastic and reconstructive surgery ... in brief
New web-based research has quantified the attractiveness of the female form. Using morphing software, German researchers manipulated the features of one woman into 243 variations with differing leg lengths, weights, bust sizes, and hip and waist widths.
Superglue from the sea
Sandcastle worms live in intertidal surf, building sturdy tube-shaped homes from bits of sand and shell and their own natural glue.
Persistent Man-made Chemical Pollutants Found in Deep-sea Octopods and Squids
New evidence that chemical contaminants are finding their way into the deep-sea food web has been found in deep-sea squids and octopods, including the strange-looking "vampire squid". These species are food for deep-diving toothed whales and other predators.
Maternal exposure to persistent organic pollutants linked to urologic conditions in boys
Higher incidences of congenital anomalies, including cryptorchidism (undescended testicles) and hypospadias, were found in boys whose mothers had higher serum levels of certain organochlorine compounds, researchers say.
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