Zobrazeno 1 - 10
of 71
pro vyhledávání: '"and Stefan Steuernagel"'
Autor:
Stefan Steuernagel, Hans-Werner Schmidt, Roman Kress, Johannes J. Wittmann, Marko Schmidt, Jürgen Senker, Denis Schneider
Publikováno v:
Crystal Growth & Design. 12:2543-2551
Using a combined approach based on X-ray powder diffraction and solid-state NMR spectroscopy, we were able to determine the crystal structure of 1,3,5-tris(2,2-dimethylpropionylamino)benzene, an efficient clarifying agent for isotactic polypropylene.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a81cbb4f8f7ff80bfaa82058649478a0
https://doi.org/10.1021/cg300151s
https://doi.org/10.1021/cg300151s
Publikováno v:
Magnetic Resonance in Chemistry. 50:159-168
Cross polarization-magic angle spinning (CPMAS) is the most used experiment for solid-state NMR measurements in the pharmaceutical industry, with the well-known variant RAMP-CPMAS its dominant implementation. The experimental work presented in this c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d16d1f83592cfd5b14000aa9c9b4d2e
https://doi.org/10.1002/mrc.3798
https://doi.org/10.1002/mrc.3798
Autor:
Lyndon Emsley, Anne Lesage, Jean-Nicolas Dumez, Stefan Steuernagel, Robin S. Stein, Elodie Salager, Bénédicte Elena-Herrmann
Publikováno v:
Chemical Physics Letters. 498:214-220
We present a new phase modulated radio-frequency pulse sequence for homonuclear dipolar decoupling in proton solid-state NMR spectroscopy, eDUMBO-PLUS-1, with a chemical shift scaling factor of 0.73. This sequence was determined by screening random s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b54db6c2366b87af5d83c00a23d41a1
https://doi.org/10.1016/j.cplett.2010.08.038
https://doi.org/10.1016/j.cplett.2010.08.038
Autor:
Søren Balling Engelsen, Flemming H. Larsen, Tina Salomonsen, Stefan Steuernagel, Henrik Max Jensen
Publikováno v:
Food Hydrocolloids. 23:1579-1586
The potential of using 1 H high-resolution (HR) magic angle spinning (MAS) nuclear magnetic resonance (NMR) of alginates suspended in D 2 O or 13 C cross-polarisation (CP) MAS NMR of alginate powders as an alternative method to the traditional 1 H so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6f3b64fb31ba9f349fb0e02352e42c7
https://doi.org/10.1016/j.foodhyd.2008.11.009
https://doi.org/10.1016/j.foodhyd.2008.11.009
Autor:
Lyndon Emsley, Bénédicte Elena, Anne Lesage, Stefan Steuernagel, Elodie Salager, Robin S. Stein
Publikováno v:
Chemical Physics Letters. 469:336-341
The solid-state NMR H-1 homonuclear decoupling sequences in the DUMBO family are shown to be effective at ultra-fast MAS rates of up to 65 kHz. The sequences are applied to model compounds glycine and [2-C-13]-L-alanine as well as the dipeptide beta-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f735e2d0e3693bf319d0f91fc3c871c
https://doi.org/10.1016/j.cplett.2008.12.073
https://doi.org/10.1016/j.cplett.2008.12.073
Autor:
Michael J. Thrippleton, Thomas J. Ball, Stefan Steuernagel, Stephen Wimperis, Sharon E. Ashbrook
Publikováno v:
Chemical Physics Letters. 431:390-396
We describe a novel method, which we call STARTMAS, that allows acquisition of high-resolution or ‘isotropic’ spin I = 3/2 NMR spectra in solids in real time. Unlike the DOR technique of Samoson et al. [Mol. Phys. 65 (1988) 1013], STARTMAS is per
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69997cbd99feda2eaab17062a753a523
https://doi.org/10.1016/j.cplett.2006.09.075
https://doi.org/10.1016/j.cplett.2006.09.075
Publikováno v:
American Mineralogist. 90:1861-1870
The high sensitivity of the satellite-transition (ST) MAS NMR technique was exploited to obtain high-resolution 17O MAS NMR spectra of the three polymorphs of Mg2SiO4: forsterite ({alpha}-Mg2SiO4), wadsleyite (s-Mg2SiO4), and ringwoodite ({gamma}-Mg2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d38d8ecb789b46c6a449d972e846ccc8
https://doi.org/10.2138/am.2005.1915
https://doi.org/10.2138/am.2005.1915
Publikováno v:
Microporous and Mesoporous Materials. 62:97-106
The conversion of a dry gel with an nSi=nGa ratio of 8.5 to zeolite [Ga]Beta (structure-type BEA) with a framework nSi=nGa ratio of 11.6 was studied by scanning electron microscopy, X-ray diffraction (XRD), and multi-nuclear solidstate NMR spectrosco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e66bf1a5d8e2d4e44f8631785b43186
https://doi.org/10.1016/s1387-1811(03)00397-4
https://doi.org/10.1016/s1387-1811(03)00397-4
Publikováno v:
Chemical Physics Letters. 367:163-169
The theory and experimental observation of the third-order effect in solid-state NMR of quadrupolar nuclei are presented. The third-order effect consists of spherical harmonic terms up to rank l =6 and shifts NMR frequencies between two spin states t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::973a9d3799faaca45b8b5d1132ea0cb3
https://doi.org/10.1016/s0009-2614(02)01681-0
https://doi.org/10.1016/s0009-2614(02)01681-0
Autor:
Stefan Steuernagel, Andrew R. Barron, Dinu Iuga, Lawrence B. Alemany, Arno P. M. Kentgens, Rhonda L. Callender
Publikováno v:
The Journal of Physical Chemistry B. 104:11612-11616
Major advances in instrumentation have made it feasible to begin studying the highly spectroscopically challenging mineral zoisite, which has octahedral aluminum sites with quadrupole coupling constants of 8.0 and 18.5 MHz. Initial results are presen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25e380bdc8c10099cc6432bf76c0b048
https://doi.org/10.1021/jp002066m
https://doi.org/10.1021/jp002066m