An Imprinting System based on Hydrogen Bonding. In our first explorations we chose to use a tetradentate macrocyclic ligand, N,N',N'',N'''-tetra(2- carbamoylethyl)-1,4,8,11- tetraazacyclotetradecane (4cyclam), to provide strong metal ion binding, with four appended arms that terminate in amide functions to provide hydrogen bonding with corresponding groups in the polymer (Structure 1). Nickel(II) ion was chosen for these studies because of the kinetic inertness of the square planar complexes it forms with tetraazamacrocycles. Because covalent interactions tend to involve slow kinetics we use those that are non-covalent for the affinity between the MIP and the imprinting metal complex. The immediate issue is ''can non-covalent interactions be strong enough to produce the proposed new methodology''? The literature indicates that imprinting using, for example, hydrogen bonding supports only 10 to 15%, certainly less than 20%, re-binding capacity. An equally compelling issue is the relationship of the combined advantages of selective complex formation and selective binding of the complex to the polymer. Further, are these macroporous polymers durable enough to be used in a separations methodology? In considering these issues, binding and selectivity have been studied at both the complex formation and the polymer/imprint level.

With adaptive-grid computational methodologies and judicious use of compressible and low Mach number combustion models, we are carrying out three-dimensional, time-dependent direct numerical simulations of a laboratory-scale turbulent premixed methane burner. In the laboratory experiment, turbulence is generated by a grid located in the throat of a 50mm diameter circular nozzle; swirl is be introduced by four tangential air jets spaced uniformly around the circumference of the nozzle just above the turbulence grid. A premixed methane flame is stabilized above the nozzle in the central core region where a velocity deficit is induced7the swirling flow. The time-dependent flow field inside the nozzle, from the turbulence grid and the high-speed jets, to the nozzle exit plane is simulated using an adaptive-grid embedded-boundary compressible Navier-Stokes solver. The compressible calculation then provides time-dependent boundary conditions for an adaptive low Mach number model of the swirl-stabilized premixed flame. The low Mach model incorporates detailed chemical kinetics and species transport using 20 species and 84 reactions. Laboratory diagnostics available for comparisons include characterizations of the flow field just down stream of the nozzle exit plane, and flame surface statistics, such as mean location, wrinkling and crossing frequencies.

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Video recording from The Black Academy of Arts and Letters recorded during their Summer Musical and Excerpts from "Sister Act II" event in 2003. This video features a youth choir musical performance live on stage singing excerpts from the film, "Sister Act II."