Search Results - "Potthast, A."

Pushing the limits of in vivo diffusion MRI for the Human Connectome Project by Setsompop, K., Kimmlingen, R., Eberlein, E., Witzel, T., Cohen-Adad, J., McNab, J.A., Keil, B., Tisdall, M.D., Hoecht, P., Dietz, P., Cauley, S.F., Tountcheva, V., Matschl, V., Lenz, V.H., Heberlein, K., Potthast, A., Thein, H., Van Horn, J., Toga, A., Schmitt, F., Lehne, D., Rosen, B.R., Wedeen, V., Wald, L.L.

“…Perhaps more than any other “-omics” endeavor, the accuracy and level of detail obtained from mapping the major connection pathways in the living human brain…”
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Combining phytate treatment and nanocellulose stabilization for mitigating iron gall ink damage in historic papers by Völkel, L., Prohaska, T., Potthast, A.

“…Because of its acidic and oxidative nature, iron gall ink promotes the endogenous degradation of paper manuscripts. Mechanical damage in areas of concentrated…”
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Evaluation of different derivatisation approaches for gas chromatographic–mass spectrometric analysis of carbohydrates in complex matrices of biological and synthetic origin by Becker, M., Zweckmair, T., Forneck, A., Rosenau, T., Potthast, A., Liebner, F.

“…► Six different single- and two-step carbohydrate derivatisation approaches compared. ► Reference compounds comprised 8 monosaccharides (C5–C6), GA and DHA. ►…”
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Ethoximation-silylation approach for mono- and disaccharide analysis and characterization of their identification parameters by GC/MS by Becker, M., Liebner, F., Rosenau, T., Potthast, A.

“…The qualitative and quantitative analysis of complex carbohydrate mixtures is a challenging problem. When tackled by GC/MS, close retention times and largely…”
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32-channel 3 Tesla receive-only phased-array head coil with soccer-ball element geometry by Wiggins, G.C., Triantafyllou, C., Potthast, A., Reykowski, A., Nittka, M., Wald, L.L.

“…A 32‐channel 3T receive‐only phased‐array head coil was developed for human brain imaging. The helmet‐shaped array was designed to closely fit the head with…”
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Comparison of physiological noise at 1.5 T, 3 T and 7 T and optimization of fMRI acquisition parameters by Triantafyllou, C., Hoge, R.D., Krueger, G., Wiggins, C.J., Potthast, A., Wiggins, G.C., Wald, L.L.

“…Previous studies have shown that under some conditions, noise fluctuations in an fMRI time-course are dominated by physiological modulations of the image…”
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Oxidation of oat β-glucan in aqueous solutions during processing by Kivelä, R., Henniges, U., Sontag-Strohm, T., Potthast, A.

“…► The study first time demonstrated the formation of oxidized functional groups along oat β-glucan chain during selected food processes. ► Oat β-glucan…”
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Aging of paper – Ultra-fast quantification of 2,5-dihydroxyacetophenone, as a key chromophore in cellulosics, by reactive paper spray-mass spectrometry by Schedl, A., Zweckmair, T., Kikul, F., Henniges, U., Rosenau, T., Potthast, A.

“…The detection of individual chromophores that contribute to the overall discoloration of paper or pulp (“yellowing”) is a challenge because these substances…”
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Nano meets the sheet: adhesive-free application of nanocellulosic suspensions in paper conservation by Völkel, L., Ahn, K., Hähner, U., Gindl-Altmutter, W., Potthast, A.

“…Historical papers are often locally damaged by exogenous influences and/or have endogenously degraded paper areas. The stabilization of such papers is very…”
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Pushing the limits: Quantification of chromophores in real-world paper samples by GC-ECD and EI-GC-MS by Schedl, A., Zweckmair, T., Kikul, F., Bacher, M., Rosenau, T., Potthast, A.

“…Widening the methodology of chromophore analysis in pulp and paper science, a sensitive gas-chromatographic approach with electron-capture detection is…”
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Filling the gap: Calibration of the low molar-mass range of cellulose in size exclusion chromatography with cello-oligomers by Oberlerchner, J.T., Vejdovszky, P., Zweckmair, T., Kindler, A., Koch, S., Rosenau, T., Potthast, A.

“…•Calibration of the low molar mass region of cellulose by cellooligomer standards.•Comparison of cellooligomer standards with commercially available…”
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A novel method to analyze the degree of acetylation in biopolymers by Zweckmair, T., Becker, M., Ahn, K., Hettegger, H., Kosma, P., Rosenau, T., Potthast, A.

“…•Zemplen-deacetylation and GC–MS were used to quantify the degree of acetylation.•Liquid phase injection represents a fast and straightforward method.•Internal…”
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The FDAM Method:  Determination of Carboxyl Profiles in Cellulosic Materials by Combining Group-Selective Fluorescence Labeling with GPC by Bohrn, R, Potthast, A, Schiehser, S, Rosenau, T, Sixta, H, Kosma, P

“…A novel method for accurate determination of the carboxyl content in cellulosic materials by fluorescence labeling with 9H-fluoren-2-yl-diazomethane (FDAM) has…”
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On the conformation of the cellulose solvent N-methylmorpholine- N-oxide (NMMO) in solution by Rosenau, T., Hofinger, A., Potthast, A., Kosma, P.

“…The N-oxide group of the cellulose solvent N-methylmorpholine- N-oxide showed a strong preference for the axial position compared with N-methyl as determined…”
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Eight-channel phased array coil and detunable TEM volume coil for 7 T brain imaging by Wiggins, G. C., Potthast, A., Triantafyllou, C., Wiggins, C. J., Wald, L. L.

“…An eight‐channel receive‐only brain coil and table‐top detunable volume transmit coil were developed and tested at 7 T for human imaging. Optimization of this…”
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Cross-Sectional Analysis of the Polysaccharide Composition in Cellulosic Fiber Materials by Enzymatic Peeling/High-Performance Capillary Zone Electrophoresis by Sjöberg, John, Potthast, Antje, Rosenau, Thomas, Kosma, Paul, Sixta, Herbert

“…A combined enzymatic, chemical, and analytical approach was used to determine the cross-sectional carbohydrate composition in cellulosic fibers. The outer…”
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Normal and abnormal pulmonary ventilation: visualization at hyperpolarized He-3 MR imaging by Kauczor, H U, Hofmann, D, Kreitner, K F, Nilgens, H, Surkau, R, Heil, W, Potthast, A, Knopp, M V, Otten, E W, Thelen, M

“…To assess the feasibility of helium-3 magnetic resonance (MR) imaging with a three-dimensional fast low-angle shot (FLASH) sequence, He-3 gas (volume, 300 mL;…”
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Radicals derived from N-methylmorpholine- N-oxide (NMMO): structure, trapping and recombination reactions by Rosenau, T, Potthast, A, Sixta, H, Kosma, P

“…The two carbon-centered radicals 4-morpholinomethyl ( 4 ) and 4-methylmorpholin-3-yl ( 5 ), generated from the primary cation radical intermediate 3 by…”
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Design considerations and coil comparisons for 7 T brain imaging by Wald, L. L., Wiggins, G. C., Potthast, A., Wiggins, C. J., Triantafyllou, C.

“…The development of 300 MHz radio-frequency (RF) head coils analogous to those used at field strengths of 1.5 and 3 T is complicated by increased dissipative…”
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Cellulosics modified with slow-release reagents. Part I. Synthesis of triazine-anchored reagents for slow release of active substances from cellulosic materials by Rosenau, T., Renfrew, A.H.M., Adelwöhrer, C., Potthast, A., Kosma, P.

“…Novel tri-functional triazines for the modification of cellulosic fibers are prepared from cyanuric chloride. The compounds employ a monochlorotriazinyl (MCT)…”
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