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Magnetic Biocomposites for Remote Melting


, : Magnetic Biocomposites for Remote Melting. Biomacromolecules 16(8): 2308-2315

A new approach toward the fabrication of biocompatible composites suitable for remote melting is presented. It is shown that magnetite nanoparticles (MNP) can be embedded into a matrix of biocompatible thermoplastic dextran esters. For that purpose, fatty acid esters of dextran with adjustable melting points in the range of 30-140 °C were synthesized. Esterification of the polysaccharide by activation of the acid as iminium chlorides guaranteed mild reaction conditions leading to high quality products as confirmed by FTIR- and NMR spectroscopy as well as by gel permeation chromatography (GPC). A method for the preparation of magnetically responsive bionanocomposites was developed consisting of combined dissolution/suspension of the dextran ester and hydrophobized MNPs in an organic solvent followed by homogenization with ultrasonication, casting of the solution, drying and melting of the composite for a defined shaping. This process leads to a uniform distribution of MNPs in nanocomposite as revealed by scanning electron microscope. Samples of different geometries were exposed to high frequency alternating magnetic field. It could be shown that defined remote melting of such biocompatible nanocomposites is possible for the first time. This may lead to a new class of magnetic remote control systems, which are suitable for controlled release applications or self-healing materials.

US$19.90

PMID: 26134099

DOI: 10.1021/acs.biomac.5b00540


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Anonymous, 1971: Novelties. Four new dwarf beans are described. Sex, a midearly wax-podded bean resistant to diseases and bearing medium-long pods suitable for fresh consumption, home gardens, canning and freezing, represents a considerable improvement over Wachs Beste von A...

Levinson, M.M.; Copeland, J.G., 1987: The organ donor: physiology, maintenance, and procurement considerations. Contemporary Anesthesia Practice 10: 31-45

Galton, D.J.; Zhang, Q.; Cavallero, E.; Cavanna, J.; Kay, A.; Charles, A.; Braschi, S.; Perlemuter, L.; Jacotot, B., 1997: Lipid transport genes and their relation to the syndrome of insulin resistance. Annals of the New York Academy of Sciences 827: 100-109

Harichaux P., 1985: Simultaneous variations of the acid base equilibrium and ventilation in the course of maximal progressive exercise new data on the detection of the anaerobic threshold. Journal De Physiologie (paris): 2a-3a

Gusakov V.A., 2001: The effect of the hydrological regime in the Rybinsk Reservoir on the distribution and dynamics of benthic cyclops. Data on the abundance, horizontal distribution, and the seasonal dynamics of the dominant species and the entire group Cyclopoida in the meiobenthos of the open littoral and profundal of the Rybinsk Reservoir are presented. The probability that th...

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Bea, R.; Cobos-Roa, D., 2008: Failure of the I-wall flood protection structures at the New Orleans Lower 9th Ward during Hurricane Katrina. Hurricane Katrina resulted in the single most catastrophic failure of a civil engineered system in the history of the United States - failure of the flood defence system for the greater New Orleans area. This paper summarizes results from several...

Plemmons, R.M.; Dooley, D.P.; Longfield, R.N., 1995: Septic thrombophlebitis of the portal vein (Pylephlebitis): Diagnosis and management in the modern era. Pylephlebitis usually occurs secondary to infection in the region drained by the portal venous system. We describe a case of pylephlebitis at our institution and examine 18 other cases culled from the literature since 1979, reviewing diagnostic an...