Search Results - "Unger, K.K."

Textural characterization of native and n-alky-bonded silica monoliths by mercury intrusion/extrusion, inverse size exclusion chromatography and nitrogen adsorption by Thommes, M., Skudas, R., Unger, K.K., Lubda, D.

“…Native and n-alkyl-bonded ( n-octadecyl) monolithic silica rods with mesopores in the range between 10 and 25 nm and macropores in the range between 1.8 and…”
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Flow-through pore characteristics of monolithic silicas and their impact on column performance in high-performance liquid chromatography by Skudas, R., Grimes, B.A., Thommes, M., Unger, K.K.

“…In order to elucidate the role of the flow-through characteristics with regard to the column performance in high-performance liquid chromatography (HPLC)…”
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Synthesis of spherical porous silicas in the micron and submicron size range: challenges and opportunities for miniaturized high-resolution chromatographic and electrokinetic separations by Unger, K.K, Kumar, D, Grün, M, Büchel, G, Lüdtke, S, Adam, Th, Schumacher, K, Renker, S

“…Classical silica technology has reached its limit with respect to an ultimate minimum particle size of about 2 μm in diameter. Here, a novel process is…”
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Comparison of an ordered mesoporous aluminosilicate, silica, alumina, titania and zirconia in normal-phase high-performance liquid chromatography by Grün, M, Kurganov, A.A, Schacht, S, Schüth, F, Unger, K.K

“…This paper investigates the behaviour of silica, alumina, titania, zirconia and the novel mesoporous aluminosilicate MCM-41 in normal-phase high-performance…”
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Evaluation of the Stability of Pure Silica MCM-41 toward Water Vapor by Ribeiro Carrott, M. M. L, Estêvão Candeias, A. J, Carrott, P. J. M, Unger, K. K

“…Water vapor adsorption/desorption isotherms at 298 K and XRD measurements and nitrogen isotherms at 77 K before and after exposure to water vapor were…”
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Impact of the post-treatment conditions of parent silica on the silanization of n-octadecyl bonded silica packings in reversed-phase high-performance liquid chromatography by Großmann, F, Ehwald, V, du Fresne von Hohenesche, C, Unger, K.K

“…Native mesoporous silica beads were subjected to a sequence of post-treatment procedure including hydrochloric acid treatment, calcination and subsequent…”
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Novel synthesis of spherical MCM-48 by Schumacher, K, Grün, M, Unger, K.K

“…A novel synthesis route was developed for the cubic member of the M41S family, MCM-48, with a three-dimensional pore system allowing the formation of…”
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Influence of ligand density on the properties of metal-chelate affinity supports by Wirth, H J, Unger, K K, Hearn, M T

“…A new procedure has been developed to immobilize iminodiacetic acid (IDA) onto the surface of silica supports, such as LiChrospher Si-1000 and 1.5-microns…”
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MCM-41, MCM-48 and related mesoporous adsorbents: their synthesis and characterisation by Kumar, D, Schumacher, K, du Fresne von Hohenesche, C, Grün, M, Unger, K.K

“…MCM-41, MCM-48, MCM-41 analogue materials and disordered silica xerogels were compared with respect to their long range and short range order, their specific…”
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Characterization of MCM-48 Materials by Schumacher, Kai, Ravikovitch, Peter I., Du Chesne, Alexander, Neimark, Alexander V., Unger, Klaus K.

“…Mesoporous molecular sieves of MCM-48 type were prepared by conventional hydrothermal and novel room temperature syntheses. Scanning electron microscopy (SEM)…”
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Ion-exchange high-performance liquid chromatography of nucleotides and polypeptides on new types of ion-exchange sorbents, based on polystyrene-coated silicas by Kurganov, A A, Davankov, V A, Unger, K K

“…A novel type of ion exchanger was prepared by multipoint covalent binding of polystyrene chains onto the surface of porous silica followed by polymer-analogous…”
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A Novel Pathway for Synthesis of Submicrometer-Size Solid Core/Mesoporous Shell Silica Spheres by Büchel, Gunter, Unger, Klaus K., Matsumoto, Akihiko, Tsutsumi, Kazuo

“…The synthesis of tailored nanoparticles—non‐porous and porous—is a major challenge in advanced materials science. The authors here report the synthesis of…”
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Comparative study on the column performance of microparticulate 5-μm C 18-bonded and monolithic C 18-bonded reversed-phase columns in high-performance liquid chromatography by Bidlingmaier, B., Unger, K.K., von Doehren, N.

“…In this paper we report on the results of a comparative study on the performance of Purospher RP 18e, 5 μm, columns and prototypes of monolithic columns named…”
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Comparative study on the column performance of microparticulate 5-μm C18-bonded and monolithic C18-bonded reversed-phase columns in high-performance liquid chromatography by BIDLINGMAIER, B, UNGER, K. K, VON DOEHREN, N

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Investigation of surface properties of lunar regolith: Part I by Robens, E., Bischoff, A., Schreiber, A., Dąbrowski, A., Unger, K.K.

“…This paper describes an initial investigation of the surface properties of three lunar soil samples from the Apollo 11, 12 and 16 missions, respectively. We…”
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Capillary electroendoosmotic chromatography of peptides by Walhagen, K, Unger, K.K, Hearn, M.T.W

“…This review focuses on the current state of peptide separation by capillary electroendoosmotic chromatography (CEC). When carried out under optimised…”
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Fractionation of membrane proteins on immobilized lectins by high-performance liquid affinity chromatography by Renauer, D, Oesch, F, Kinkel, J, Unger, K K, Wieser, R J

“…Detergent-solubilized glycoproteins were fractionated on high-performance affinity columns employing A concanavalin and Pisum sativum agglutinin as ligands…”
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Sulphonic acid strong cation-exchange restricted access columns in sample cleanup for profiling of endogeneous peptides in multidimensional liquid chromatography by Machtejevas, E., Denoyel, R., Meneses, J.M., Kudirkaitė, V., Grimes, B.A., Lubda, D., Unger, K.K.

“…In this work, the pore structural parameters and size exclusion properties of LiChrospher strong cation-exchange and reverse phase restricted access materials…”
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Development of standard operation procedures for the manufacture of n-octadecyl bonded silicas as packing material in certified reference columns for reversed-phase liquid chromatography by Hohenesche, C.du Fresne von, Ehwald, V, Unger, K.K

“…The development of standard operation procedures for the manufacture of a n-octadecyl bonded spherical silica packing from partially condensed…”
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Separation of selected peptides by capillary electroendoosmotic chromatography using 3 μm reversed-phase bonded silica and mixed-mode phases by Walhagen, K, Unger, K.K, Olsson, A.M, Hearn, M.T.W

“…The retention behaviour and selectivity of selected basic, neutral and acidic peptides have been studied by capillary electroendoosmotic chromatography (CEC)…”
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