scholarly journals Nanofluidity of Fatty Acid Hydrocarbon Chains As Monitored by Benchtop Time-Domain Nuclear Magnetic Resonance

Biochemistry ◽  
2014 ◽  
Vol 53 (48) ◽  
pp. 7515-7522 ◽  
Author(s):  
Michelle D. Robinson ◽  
David P. Cistola
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fatty Acid ◽  
Magnetic Resonance ◽  
Time Domain ◽  
Hydrocarbon Chains ◽  
Nuclear Magnetic

Measuring the solubility product constant of paramagnetic cations using time-domain nuclear magnetic resonance relaxometry

2015 ◽  
Vol 121 ◽  
pp. 14-17 ◽  
Author(s):  
Paulo Falco Cobra ◽  
Bruna Ferreira Gomes ◽  
Cirlei Igreja Nascimento Mitre ◽  
Lucio Leonel Barbosa ◽  
Lucinéia Vizzotto Marconcini ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Time Domain ◽  
Solubility Product ◽  
Nuclear Magnetic Resonance Relaxometry ◽  
Solubility Product Constant ◽  
Nuclear Magnetic

scholarly journals Determination of the 1,3- and 2-Positional Distribution of Fatty Acids in Olive Oil Triacylglycerols by 13C Nuclear Magnetic Resonance Spectroscopy

2006 ◽  
Vol 89 (4) ◽  
pp. 1071-1076 ◽  
Author(s):  
Giovanna Vlahov
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fatty Acid ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Olive Oil ◽  
Distribution Pattern ◽  
Random Distribution ◽  
Linear Models ◽  
13C Nuclear Magnetic Resonance ◽  
Nuclear Magnetic

Abstract Linear models were selected from a large data set acquired for Italian olive oil samples by quantitative 13C nuclear magnetic resonance (NMR) spectroscopy with distortionless enhancement by polarization transfer (DEPT). The models were used to determine the composition of the 2 fatty acid pools esterifying the 1,3- and 2-positions of triacylglycerols. The linear models selected proved that the 1,3- and 2-distribution of saturated, oleate, and linoleate chains in olive oil triacylglycerols deviated from the random distribution pattern to an extent that depended on the concentration of the fatty acid in the whole triacylglycerol. To calculate the fatty acid composition of the 1,3- and 2-positions of olive oil triacylglycerols, the equations of the selected linear models were applied to the fatty acid percentages determined by gas chromatography. These data were compared with the values predicted by the computer method (used to determine the theoretical amounts of triacylglycerols), which is based on the 1,3-random-2-random theory of the fatty acid distribution in triacylglycerols. The biggest differences were found in the linoleate chain, which is the chain that deviated the most from a random distribution pattern. The results confirmed that the 1,3-random-2-random distribution theory provides an approximate method for determining the structure of triacylglycerols; however, the linear models calculated by the direct method that applies 13C NMR spectroscopy represent a more precise measurement of the composition of the 2 fatty acid pools esterifying the 1,3- and 2-positions of triacylglycerols.

Water migration in poplar wood during microwave drying studied by time domain nuclear magnetic resonance (TD-NMR)

Holzforschung ◽  
2017 ◽  
Vol 71 (11) ◽  
pp. 881-887 ◽  
Author(s):  
Xinyu Li ◽  
Yulei Gao ◽  
Minghui Zhang ◽  
Ximing Wang ◽  
Xinyue Wei
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Time Domain ◽  
Bound Water ◽  
Free Water ◽  
Microwave Drying ◽  
Drying Rate ◽  
Drying Time ◽  
The Time Domain ◽  
Nuclear Magnetic

AbstractThe migration of bound water and free water has been investigated during microwave drying of wood by the time domain nuclear magnetic resonance (TD-NMR) technique. Both the heartwood (hW) and sapwood (sW) of Beijing poplar (Populus beijingensisW. Y. Hsu) and Qingpi poplar (Populus platyphyllaT. Y. Sun) were studied. The microwave drying is characterized by a fast drying rate, and there is a linear relation between moisture content (MC) and microwave drying time (t). The drying rate of free water is about 2.7 times more rapid than that of bound water. The spin-spin relaxation time (T2) revealed that most of the water was free water situated in smaller pores. The irregular T2 signal amplitudes of free water in hWs indicated that fractional water in smaller pores was transferred into bigger pores during drying.

Nanopore Structure Buildup during Endodontic Cement Hydration Studied by Time-Domain Nuclear Magnetic Resonance of Lower and Higher Mobility1H

2010 ◽  
Vol 114 (5) ◽  
pp. 1767-1774 ◽  
Author(s):  
Mirko Gombia ◽  
Villiam Bortolotti ◽  
Boris De Carlo ◽  
Romano Mongiorgi ◽  
Silvano Zanna ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Time Domain ◽  
Cement Hydration ◽  
Nanopore Structure ◽  
Nuclear Magnetic

Nuclear magnetic resonance screening of changes in fatty acid and cholesterol content of ovine milk induced by ensiled olive cake inclusion in Chios sheep diets

2019 ◽  
Vol 177 ◽  
pp. 111-116 ◽  
Author(s):  
Simoni Symeou ◽  
Constantinos G. Tsiafoulis ◽  
Ioannis P. Gerothanassis ◽  
Despoina Miltiadou ◽  
Ouranios Tzamaloukas
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fatty Acid ◽  
Magnetic Resonance ◽  
Cholesterol Content ◽  
Olive Cake ◽  
Chios Sheep ◽  
Nuclear Magnetic
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