scholarly journals New method for determining the composition of liquid media during the express control of their state using the nuclear magnetic resonance phenomena

2019 ◽  
Vol 1400 ◽  
pp. 066008 ◽  
Author(s):  
N S Myazin ◽  
V V Davydov ◽  
V Yu Rud’ ◽  
V V Yushkova ◽  
V I Dudkin
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
New Method ◽  
Liquid Media ◽  
Resonance Phenomena ◽  
Nuclear Magnetic

scholarly journals Identification of Ambergris from the New Bedford Whaling Museum by Nuclear Magnetic Resonance Spectroscopy

1996 ◽  
Vol 79 (2) ◽  
pp. 423-425 ◽  
Author(s):  
George A Moniz ◽  
Gerald B Hammond
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Adsorption Chromatography ◽  
New Method ◽  
Major Constituent ◽  
Resonance Spectroscopy ◽  
Nuclear Magnetic

Abstract A new method for the separation and identification of ambrein in ambergris using adsorption chromatography and 1H and 13C Fourier transform nuclear magnetic resonance spectroscopy (FT-NMR) is presented. We demonstrated the effectiveness of this method by analyzing an approximately 85-year-old sample of suspected ambergris from the New Bedford Whaling Museum (New Bedford, MA). Results prove that ambrein remains a major constituent of ambergris even after 85 years of storage under ordinary conditions.

scholarly journals C-S-H Pore Size Characterization Via a Combined Nuclear Magnetic Resonance (NMR)–Scanning Electron Microscopy (SEM) Surface Relaxivity Calibration

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1779 ◽  
Author(s):  
Christoph Naber ◽  
Florian Kleiner ◽  
Franz Becker ◽  
Long Nguyen-Tuan ◽  
Christiane Rößler ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ion Beam ◽  
New Method ◽  
Sem Images ◽  
Surface Relaxivity ◽  
Scanning Electron ◽  
Nuclear Magnetic

A new method for the nuclear magnetic resonance (NMR) surface relaxivity calibration in hydrated cement samples is proposed. This method relies on a combined analysis of 28-d hydrated tricalcium silicate samples by scanning electron microscopy (SEM) image analysis and 1H-time-domain (TD)-NMR relaxometry. Pore surface and volume data for interhydrate pores are obtained from high resolution SEM images on surfaces obtained by argon broad ion beam sectioning. These data are combined with T2 relaxation times from 1H-TD-NMR to calculate the systems surface relaxivity according to the fast exchange model of relaxation. This new method is compared to an alternative method that employs sequential drying to calibrate the systems surface relaxivity.

The measurement of frequency separations in high resolution nuclear magnetic resonance spectra using a frequency modulated observing field

1972 ◽  
Vol 25 (6) ◽  
pp. 1207 ◽  
Author(s):  
AG Moritz
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Line Profile ◽  
New Method ◽  
Side Band ◽  
Nuclear Magnetic Resonance Spectra ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

A new method for the measurement of frequency separations in high resolution nuclear magnetic resonance spectra is presented. The method, which involves comparison of two points on the line profile, is shown to be capable of an internal precision of at least 2 mHz. Line separations measured in this way are shown to give results consistent with those obtained using a double-lock spectrometer and a nuclear double side-band oscillator.

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