Coates’cation

Huhn, G. and Muller, H., Polymer-coated cation exchangers in high-performance ion chromatography preparation and application, /. Chromatogr., 640, 57, 1993. 

Coates cation [51], originally proposed to account for the exceptionally rapid stereospecific hydrolysis of the />-nitrobenzoate [59] (Coates and Kirkpatrick, 1970), joins the ranks of the well-established trishomoaro-matics. Proton and l3C NMR observations on [51] (and a methyl and phenyl derivative) supported the symmetrical delocalized nature of this ion (Coates... 

Using a similar procedure, it was also possible to coat cationic and anionic latexes with zirconium hydrous oxide (145). On careful heating such powders in air at temperatures >500°C the core polymer was vaporized and the shell was calcined to yield hollow spheres of Zr02, as illustrated in Figure I.1.21B (145). 

Laeubli, M. and Kampus, B. (1995) Selectivity Enhancement on a Poly (butadiene-maleic acid) Coated Cation Phase Induced by Ethylene Oxide-based Complexing Agents, J. Chromatogr. A 706, 103-107. 

Massive and selective delivery of lipid-coated cationic lipoplexes of oligonucleotides targeted in vivo to hepatic endothelial cells, Pharm. Res., 19, 676-680. 

On similar grounds Saunders and Kates (1980) have concluded that Coates cation [31] is a static symmetrical structure. 

Coates cation of pentacyclo[A.7i.0.Q. 0 ]non-9-yUum cation The title ion [31] has unique structural and symmetry properties and shows multiple degeneracy. Through the bridge-flip mechanism (262) all nine carbons in this trishomoaromatic ion become equivalent. 

Fig. 4. Percent uptake of different iiposomai formuiations conjugated to Rtiodamine by human DCs measured through flow cytometry. Ceiis were incubated with Rhodamine-MSP-1, g-ioaded iiposomai formuiations and anaiyzed at different time intervals (0,15,30,60,120,180, and 360 min). The kinetics of uptake has been presented with mean fluorescence intensity (MFI) vs. counts by FACS analysis and percentage uptake at various time inten/als. Uptake of formulation on a per cell basis was quantified as fluorescence intensity per cell. Percentage of positive cells was determined as proportion ot cells with fluorescence intensity higher than 99% of cells of the control sample (cells incubated with unconjugated rhodamine alone). Flow cytometric analysis revealed that the percentage of rhodamine-positive DCs increased rapidly and reached a plateau after 16 h of incubation (means of three independent experiments). A steady increase in the uptake percentage (%) was recorded and a maximum cell-associated fluorescence was observed at 16 h for OPM-coated cationic liposomes. Flow cytometric analysis of DCs revealed that plain liposomes did not significantly enhance the antigen uptake by DCs compared with the uptake recorded for mannan-coated liposomes...

P. Kolia, J. Kohler and G. Schomburg, Polymer-Coated Cation-Exchange Stationary Phases on the Basis of Silica, Chromatographia, 23, No. 7,465,1987. 

Blocked Isocyanates. For certain applications, such as wire enamels, coil coatings, fabric coatings, powder coatings, cationic electrodeposition coatings, etc., "blocked" isocyanates are being... 

Y. Onoue, Y. Mizutani, R. Yamane and Y. Takasaki, Permselectivity of improved cation exchange membranes for NaCl-CaCl2 system, Denki Kagaku (J. Electrochem. Soc. Jpn.), 1961, 29, 544 T. Yawataya, H. Hani, Y. Oda and A. Nishihara, Thinly resin coated cation exchange resin membrane with permselectivity between uni- and di-valent cations, Dechema Monographien Band II, Verlag Chemie, Weinheim, 1962, p. 501. 

When the RuOj powder was first put on the surface of CdS and the polymer Ru(bpy)i+ was coated over them, the surface of CdS/RuOj showed an ohmic character The coated cationic Ru complex film adsorbed by electrostatic... 

Kesavan K, et al. Mucoadhesive chitosan-coated cationic microemulsion of dexameth-asone for ocular dehvery in vitro and in vivo evaluation. Curr Eye Res 2013 38(3) 342-52. 

PROBLEM 21.26 How many signals would a rapidly equilibrating Coates cation show in its NMR spectrum ... 

Happily, the sulfonate ionizes to give a stable ion at low temperature in superacid and the case is settled, because the spectrum consists of exactly the three signals required for a delocalized structure no more and no fewer. Coates cation is a three-carbon, two-electron system, there is no doubt about it. 

Coatings, cation-exchange resins Vinyl thioacetate Britain 585,755 1947 Imperial Chemical... 

Fig. 9 Methods of coating cationic complexes with hydrophilic and anionic polymers...

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