1-20 of 271 Search Results for

magnetic resonance

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001752
EISBN: 978-1-62708-178-8
... Abstract Nuclear magnetic resonance (NMR) is a form of radio frequency spectroscopy based on interactions between nuclear magnetic dipole or electric quadrupole moments and an applied magnetic field or electric-field gradient. This article provides an overview of the fundamental principles...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006650
EISBN: 978-1-62708-213-6
... Abstract This article focuses on the application of solid-state nuclear magnetic resonance (NMR) spectroscopy in materials science, especially for inorganic and organic polymer solids. It begins with a discussion on the general principles of NMR, providing information on nuclear spin...
Image
Published: 15 December 2019
Fig. 2 Simple block diagram of a modern nuclear magnetic resonance (NMR) instrument. Key components involved in generation of radio frequency (RF) and detection of NMR signal are shown. Other important components, as well as second and third RF channels, are omitted for clarity. More
Image
Published: 15 December 2019
Fig. 3 Photo of a standard magic-angle spinning (MAS) nuclear magnetic resonance (NMR) probe (Chemagnetics/Varian wide-bore design, 89 mm, or 3.5 in.). The sample rotor is inserted into the MAS housing through the opening near the top of the probe. Air attachments, for both drive and bearing More
Image
Published: 15 December 2019
Fig. 5 A 9.5 mm (0.37 in.) magic-angle spinning nuclear magnetic resonance (MAS NMR) rotor (drive tip not fully inserted for clarity) along with a typical glass insert that can contain nonsolid samples and fit tightly into the zirconia rotor for standard MAS NMR experiments. A synthetic More
Image
Published: 15 December 2019
Fig. 6 The 31 P nuclear magnetic resonance (NMR) spectra of crystalline Sn 2 P 2 O 7 at 11.7 T (ω L = 202 MHz) using a 3.2 mm (0.13 in.) magic-angle spinning (MAS) NMR probe. The spectrum in (a) was obtained under static conditions (i.e., no sample spinning), while the other spectra were More
Image
Published: 15 December 2019
Fig. 7 Idealized diagram of nuclear magnetic resonance (NMR) signal as a function of radio-frequency (RF) pulse width. Maximum signal can be achieved by applying a 90° or π/2 pulse width. More
Image
Published: 15 December 2019
Fig. 8 The 31 P magic-angle spinning nuclear magnetic resonance spectra of crystalline Sn 2 P 2 O 7 with (a) no apodization and (b) 200 Hz Gaussian line broadening. Only the isotropic peaks due to the two Q 1 polyhedra are shown. More
Image
Published: 15 December 2019
Fig. 9 The 31 P magic-angle spinning nuclear magnetic resonance spectra of glassy 10Na 2 O·45CaO·45P 2 O 5 . (a) Spectrum showing only the isotropic peaks. (b) Full spectrum with all spinning sidebands (ssb). Gaussian fits to the isotropic peaks and associated spinning sidebands are shown More
Image
Published: 15 December 2019
Fig. 10 Examples of (a) 11 B magic-angle spinning nuclear magnetic resonance (MAS NMR) spectrum (16.4 T) of a sodium borosilicate glass with composition of 33Na 2 O-53B 2 O 3 -14SiO 2 and (b) 27 Al MAS NMR spectrum (16.4 T) of a glass with composition of 20CaO-30Al 2 O 3 -50SiO 2 More
Image
Published: 15 December 2019
Fig. 11 The 29 Si magic-angle spinning nuclear magnetic resonance spectrum of a cordierite (aluminosilicate) ceramic. This ceramic contains two different tetrahedral sites, denoted T 1 and T 2 , each of which is occupied by silicate tetrahedra having different numbers of next-nearest More
Image
Published: 15 December 2019
Fig. 12 Additional examples of solid-state nuclear magnetic resonance studies of ceramics. (a) 27 Al magic-angle spinning nuclear magnetic resonance (MAS NMR) spectrum of γ-alumina, showing resolution of aluminum in tetrahedral and octahedral sites. (b) 1 H MAS NMR spectrum of H-ZSM-5 More
Image
Published: 15 December 2019
Fig. 13 Solid-state magic-angle spinning nuclear magnetic resonance (NMR) spectra of (a) 29 Si and (b) 27 Al in a β-spodumene glass-ceramic, before and after heat treatment. Spinning sidebands are marked as “ssb,” and dashed curves denote fitted peaks. More
Image
Published: 15 May 2022
Fig. 12 Nuclear magnetic resonance spectra of styrene-acrylonitrile (SAN). Source: Ref 11 More
Image
Published: 15 May 2022
Fig. 13 Nuclear magnetic resonance spectra of polypropylene. (a) Isotactic, (b) Syndiotactic. CH, tertiary carbon group along the polypropylene chain; CH2, methylene groups along the polypropylene chain (internal) or some methylene groups that occur as C=CH2 along the chain, CH2 being a side More
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001112
EISBN: 978-1-62708-162-7
..., thermonuclear fusion, and nuclear magnetic resonance. cold processing fabrication technology hot processing superconducting properties ternary molybdenum chalcogenides THE TERNARY MOLYBDENUM CHALCOGENIDES have generated many fundamental as well as applied research efforts since their discovery...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006931
EISBN: 978-1-62708-395-9
... the characterization of plastics by infrared and nuclear magnetic resonance spectroscopy, differential scanning calorimetry, differential thermal analysis, thermogravimetric analysis, thermomechanical analysis, and dynamic mechanical analysis. The article also discusses the use of X-ray diffraction for analyzing...
Image
Published: 15 December 2019
Fig. 15 The 13 C cross-polarization magic-angle spinning nuclear magnetic resonance spectrum of silica gel treated with γ-aminopropyl triethoxysilane. Two resonances from unreacted ethoxide functionality are identified, and the other three resonances are from the aminopropyl group More
Image
Published: 01 January 1990
Fig. 1 Plot of critical current density versus magnetic flux density to compare properties of powder-in-tube process oxide-base superconductors with that of conventional superconductors. MRI, magnetic resonance imaging; SSC, superconducting supercollider More
Image
Published: 12 September 2022
Fig. 6 Additively manufactured models. (a) Methotrexateladen catheters. Source: Ref 42. (b) Positron emission tomography/magnetic resonance imaging resolution phantom. Source: Ref 43 More