標題: such as a windshield that will smooth if a small crack is generated 24 [打印本頁] 作者: hyxyrhhh 時間: 2016-3-24 22:46 標題: such as a windshield that will smooth if a small crack is generated 24
Chemists Create New Polymers By Adding DNA Base Pairs
Base pairs are the nucleotides on each side of the rungs that connect the strands of the DNA ladder. Adenine pairs with thymine; cytosine pairs with guanine.
Brian Mather of Albuquerque, a chemical engineering graduate student who is working with chemistry Professor Timothy E. Long in the College of Science at Virginia Tech, is studying how these molecules recognize each other in supramolecular complexes. He is attaching adenine and thymine as the Supra Online Store Australia outer sequences of triblock Ghd Factory Outlet Australia copolymers. These are polymers where the units of a molecular chain are connected in blocks of the same structure (xxxxxxxyyyyyyyyzzzzzzzz) rather than mixed randomly. "The base pair Louboutin Shoes Australia containing block copolymers are used as precursors for subsequent molecular recognition," said Long.
"We are trying to integrate molecular biology with traditional macromolecular science in order to synthesize novel families of elastomers. The base pairs disassociate when heated and permit the polymer to easily flow in the melt state, making it easier to process with less energy," said Mbt Shoes Nz Long. "When the triblock copolymer cools, the pairs reconnect and provide desirable elasticity and molecular recognition possibilities."
He said, "The concentration of base pairs can be very low because they are exquisite at recognizing each other. The strength of recognition is high and tunable."
The heated material is poured in a mold Adidas Js Wings 2.0 Black Flag or applied to a surface to become a thin film. "We believe Christian Louboutin Sale Online we can create thermo reversible or self healing surfaces, such as a windshield that will smooth if a small crack is generated," said Long.
The technology is one that is being investigated by the Multilayered Technologies for Armored Structures and Composites Ghd Hair Dryer (MultiTASC) Materials Center of Excellence at Virginia Tech with funding from the Army Research Laboratory.
"This research could also benefit Southwest Virginia," Long said. "It could Adidas Js Wings 2.0 be the basis of biomaterial technologies developed by the Virginia Maryland Regional College of Veterinary Medicine or the Virginia College of Osteopathic Medicine here and that a local company might produce. chief, visiting Ebola countries, urges respect for health rulesNew York Mayor de Blasio named PETA's Person of the YearBlackBerry third quarter revenue falls more than expected, shares slide.
