Results 271 to 280 of about 265,344 (330)

Solid‐State Nuclear Magnetic Resonance

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cecil Dybowski, Shi Bai
openaire   +1 more source

Solid-state nuclear magnetic resonance investigations on chlorocyclophosphazenes

Solid State Nuclear Magnetic Resonance, 1995
The present study deals with solid-state nuclear magnetic resonance (NMR) investigations on hexachlorocyclotriphosphazene (N3P3Cl6) and T and K form of octachlorocyclotetraphosphazene (N4P4Cl8). Using 31P NMR we have recorded spectra of different magic-angle spinning (MAS) frequencies and static powder spectra.
S, Paasch, K, Krüger, B, Thomas
openaire   +2 more sources

Solid-State Nuclear Magnetic Resonance Spectroscopy-Pharmaceutical Applications

Journal of Pharmaceutical Sciences, 2003
Solid-state nuclear magnetic resonance (NMR) spectroscopy has become an integral technique in the field of pharmaceutical sciences. This review focuses on the use of solid-state NMR techniques for the characterization of pharmaceutical solids (drug substance and dosage form). These techniques include methods for (1) studying structure and conformation,
Patrick A, Tishmack, David E, Bugay, Stephen R, Byrn   +2 more
openaire   +2 more sources

NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY TECHNIQUES | Solid-State

2005
As in NMR of liquid samples, solid state NMR probes the magnetic interactions of atomic nuclei. These interactions yield detailed information about the local structure and dynamics of the sample, including the bonding types and geometry, the site-site connectivity patterns, and the spatial characteristics and time-scales of atomic and molecular motions.
Zwanziger, J., Spiess, H.
openaire   +2 more sources

The first solid-state 171Yb nuclear magnetic resonance spectra

Solid State Nuclear Magnetic Resonance, 1994
The first powder and magic-angle spinning (MAS) experiments on 171Yb are reported. The divalent ytterbium compound RbYbI3 was studied by solid-state 171Yb nuclear magnetic resonance (NMR) and a powder spectrum of axial symmetry was obtained. The principal components of the chemical shielding tensor were determined as sigma 11 = sigma 22 = -62 ppm and ...
X A, Mao, X, Zhao, C, Ye, S, Wang
openaire   +2 more sources

Solid-State Emulsions: Evaluation by 1H and 13C Solid-State Nuclear Magnetic Resonance

Pharmaceutical Research, 1994
The molecular environment of sucrose and mineral oil within sucrose and mineral oil solid state emulsions was investigated by NMR techniques. The 13C and 1H chemical shifts of sucrose and mineral oil to those observed in solid state emulsions (comprised of sucrose and mineral oil) were equivalent, indicating that the local structure of sucrose is ...
M L, Shively, S F, Dec
openaire   +2 more sources

Solid State Nuclear Magnetic Resonance Spectroscopy

1993
The area of mesoporous materials tends to suffer from a lack of detailed structural analysis, that is due to a dearth of well crystallisad materials and ill-defined pore size. That is to say that the crystals produced are often 100 small to diffract X-rays coherently, let alone large and sufficiently free of defects for single crystal X-Ray analysis to
M. J. Hudson, A. D. Workman
openaire   +1 more source

Two novel solid-state nuclear magnetic resonance probes

Review of Scientific Instruments, 1996
The design and construction of two novel solid-state NMR probes are described. One probe incorporates a high-resolution goniometer for single-crystal studies, while the other can apply tension (≳5000 N) to fiber bundles. Deuterium spectra demonstrating the sensitivity of both probes are presented.
Carl A. Michal, Lynn W. Jelinski
openaire   +1 more source

Solid-State Nuclear Magnetic Resonance Spectroscopy of Minerals

Annual Review of Earth and Planetary Sciences, 1985
Nuclear magnetic resonance (NMR) spectroscopy has been a useful tool for examining the structure of molecules in solution since the 1950s. It has only been since the late 1970s and early 1980s, though, that developments in very high field superconducting magnets and magic-angle sample-spinning (MASS) have made NMR routinely useful for examining the ...
R. James Kirkpatrick, Karen Ann Smith, Suzanne Schramm, Gary Turner, Wang-Hong Yang   +4 more
openaire   +2 more sources