Biomedical subjects

LA Chrisstoffels

Publications and source records attributed to LA Chrisstoffels.

3 recordsLinked to original sources

PubMed2000

A simple method for controlling dendritic architecture and diversity: A parallel monomer combination approach

A novel parallel monomer combination approach to manipulating the architectural disposition of dendritic macromolecules is described. It harnesses the synthetic speed and power of the double-stage convergent growth approach and classical parallel synthesis to prepare diverse series of dendrimers that possess a predetermined number and arrangement of "internal" functional moieties. This methodology is applied for the preparation of a novel family of poly(benzyl ether) dendrimers possessing 1-15 "internal" allyloxy groups, which are displayed in a highly controlled, layer-specific, generational manner.

Journal Article↗

PubMed2000

Surface-Confined Light Harvesting, Energy Transfer, and Amplification of Fluorescence Emission in Chromophore-Labeled Self-Assembled Monolayers This research was supported by the office of Naval Research, the AFOSR-MURI program, as well as fellowships from the Netherlands Scientific Organization (NWO), and from the Eastman Kodak Company, which are gratefully acknowledged.

Explore the source record for details and available documents.

Journal Article↗

PubMed2000

Facilitated transport of salts by neutral anion carriers

Partitioning of ions from water to the membrane solvent (NPOE) can be quantified by Gibbs free energies of transfer, deltaG(tr,NPOE)(ion). These were derived from transport studies of lipophilic salts through supported liquid membranes (SLMs) in the absence of the carrier. Partition coefficients Kp for various salts can now be calculated. The neutral anion receptors uranyl sal(oph)enes 1-5 transport Cl- and H2PO4- as tetrapropylammonium salts. The transport is diffusion-limited and can be described by two transport parameters Dm and K(ex). From the extraction constants K(ex) and the partition coefficients Kp of the transported salts, the association constants Ka of the anion receptors for Cl- and H2PO4- in NPOE were determined. Competitive transport with carriers 3 and 4 of NPr4H2PO4 and NPr4Cl demonstrated highly selective transport of H2PO4- even in the presence of excess of Cl-.

Journal Article↗