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Fusion Science and Technology
Researchers report fastest purification of astatine-211 needed for targeted cancer therapy
Astatine-211 recovery from bismuth metal using a chromatography system. Unlike bismuth, astatine-211 forms chemical bonds with ketones.
In a recent study, Texas A&M University researchers have described a new process to purify astatine-211, a promising radioactive isotope for targeted cancer treatment. Unlike other elaborate purification methods, their technique can extract astatine-211 from bismuth in minutes rather than hours, which can greatly reduce the time between production and delivery to the patient.
“Astatine-211 is currently under evaluation as a cancer therapeutic in clinical trials. But the problem is that the supply chain for this element is very limited because only a few places worldwide can make it,” said Jonathan Burns, research scientist in the Texas A&M Engineering Experiment Station’s Nuclear Engineering and Science Center. “Texas A&M University is one of a handful of places in the world that can make astatine-211, and we have delineated a rapid astatine-211 separation process that increases the usable quantity of this isotope for research and therapeutic purposes.”
The researchers added that this separation method will bring Texas A&M one step closer to being able to provide astatine-211 for distribution through the Department of Energy’s Isotope Program’s National Isotope Development Center as part of the University Isotope Network.
Details on the chemical reaction to purify astatine-211 are in the journal Separation and Purification Technology.
Vladimir I. Kolobov
Fusion Science and Technology | Volume 55 | Number 2 | February 2009 | Pages 30-37
Technical Paper | Seventh International Conference on Open Magnetic Systems for Plasma Confinement | dx.doi.org/10.13182/FST09-A6979
Articles are hosted by Taylor and Francis Online.
We describe state-of-the-art simulations of weakly ionized low-temperature plasmas for modern technologies. Emphasis is placed on fluorocarbon plasmas for manufacturing microelectronic devices and plasmas of rare gases for excimer lamps. Electron kinetics plays a crucial role in these plasmas. We illustrate the specifics of electron kinetics in different types of gas discharges. We evaluate the availability and quality of electron collision cross sections (total and differential) for elastic collisions with neutral species, excitation of electronic levels of atoms and internal levels of molecules, as well as their effect on the electron distribution function (EDF) and plasma chemistry. Among the crucial data needs for simulations of industrial plasma sources are validated gas-phase chemical reaction mechanisms including electron-induced reactions and gas phase reactions among heavy species.