Nuclear magnetic resonance (NMR) studies of homeopathic solutions

2001 ◽  
Vol 90 (01) ◽  
pp. 14-20 ◽  
Author(s):  
S Aabel ◽  
S Fossheim ◽  
F Rise
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
1H Nmr ◽  
Deionized Water ◽  
Water Proton ◽  
Nmr Studies ◽  
T1 Relaxation ◽  
Alcohol Water ◽  
And Control ◽  
Nuclear Magnetic

AbstractThe efficacy of homeopathy is controversial. Nuclear magnetic resonance (NMR) has been used to study homeopathic solutions, showing provocative results. We examined the reproducibility of one of the allegedly positive studies. 1H NMR spectra were recorded for Sulphur D4, diluted and succussed up to D30 (called potentization) at two different frequencies (300 and 500 MHz). The Sulphur solution had been potentiated according to homeopathic principles with deionized water and alcohol. Water proton T1 relaxation measurements were performed also at 20 MHz for the different potentiated Sulphur solutions. Furthermore, the homeopathic remedy Betula alba 30c (birch pollen extract) and appropriate control solution (deionized water, unsuccussed solutions and placebo globules) were measured analogously, both with frequencies giving spectra and T1 relaxometry.The Sulphur remedies showed identical one dimensional proton spectra (1H NMR) at 300 and 500 MHz, regardless of dilution/succussion stage, from D4 to D30. Furthermore, Betula 30c as a potentiated solution and its controls (ethanol dilutions and Betula diluted but not succussed) showed identical spectra. Nor were there any statistically significant differences in longitudinal (T1) relaxation times between deionized water and Sulphur D10 to D30 preparations. The shorter T1 of the Sulphur D4 preparation could be ascribed to the higher microviscosity within the sample matrix caused by the high concentration of dissolved material. Also, the T1 values of the Betula alba 30c preparation (in globular form) and control placebo globules were identical.In conclusion, published results from NMR research on homeopathy indicating differences between homeopathic solutions and control samples could not be reproduced.

Nuclear magnetic resonance (NMR) studies of hydrogen diffusion in Zr2Ni hydrides

1987 ◽  
Vol 129 ◽  
pp. 297-303 ◽  
Author(s):  
F. Aubertin ◽  
S.J. Campbell ◽  
J.M. Pope ◽  
U. Gonser
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Hydrogen Diffusion ◽  
Nmr Studies ◽  
Nuclear Magnetic

Nuclear magnetic resonance (NMR) studies of sintering effects on the lithium ion dynamics in Li1.5Al0.5Ti1.5(PO4)3

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Edda Winter ◽  
Philipp Seipel ◽  
Tatiana Zinkevich ◽  
Sylvio Indris ◽  
Bambar Davaasuren ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Lithium Ion ◽  
Magic Angle Spinning ◽  
Spin Lattice Relaxation ◽  
Magic Angle ◽  
Nmr Studies ◽  
Lithium Ions ◽  
Jump Dynamics ◽  
Nuclear Magnetic

Abstract Various nuclear magnetic resonance (NMR) methods are combined to study the structure and dynamics of Li1.5Al0.5Ti1.5(PO4)3 (LATP) samples, which were obtained from sintering at various temperatures between 650 and 900 °C. 6Li, 27Al, and 31P magic angle spinning (MAS) NMR spectra show that LATP crystallites are better defined for higher calcination temperatures. Analysis of 7Li spin-lattice relaxation and line-shape changes indicates the existence of two species of lithium ions with clearly distinguishable jump dynamics, which can be attributed to crystalline and amorphous sample regions, respectively. An increase of the sintering temperature leads to higher fractions of the fast lithium species with respect to the slow one, but hardly affects the jump dynamics in either of the phases. Specifically, the fast and slow lithium ions show jumps in the nanoseconds regime near 300 and 700 K, respectively. The activation energy of the hopping motion in the LATP crystallites amounts to ca. 0.26 eV. 7Li field-gradient diffusometry reveals that the long-range ion migration is limited by the sample regions featuring slow transport. The high spatial resolution available from the high static field gradients of our setup allows the observation of the lithium ion diffusion inside the small (<100 nm) LATP crystallites, yielding a high self-diffusion coefficient of D = 2 × 10−12 m2/s at room temperature.

Response of 31P-nuclear magnetic resonance spectra of frog skin to variations in PCO2 and hypoxia

1983 ◽  
Vol 245 (6) ◽  
pp. F792-F800
Author(s):  
R. L. Nunnally ◽  
J. S. Stoddard ◽  
S. I. Helman ◽  
J. P. Kokko
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Epithelial Transport ◽  
Transport Processes ◽  
Nmr Studies ◽  
Nernst Potential ◽  
31P Nuclear Magnetic Resonance ◽  
Order Of Magnitude ◽  
Epithelial Sheets ◽  
Nuclear Magnetic

31P-nuclear magnetic resonance (NMR) studies were conducted on split epithelial sheets of frog skins to examine the effects of hypoxia and respiratory pH variations on various phosphate-containing intracellular substrates. Frog skins were split into epithelial sheets from which the supporting tissue was removed. Epithelial sheets in either phosphate-free Cl--Ringer or phosphate-free SO2-4-Ringer were bubbled at room temperature with 100% N2, 100% O2, 2% CO2-98% O2, 5% CO2-95% O2, and 15% CO2-85% O2. The results show that the intracellular pH (pHi) with Cl- -Ringer was 7.19 and with SO2-4-Ringer was 7.42 with extracellular pH of 7.52 when bubbled with 100% O2. These pHiS indicate that H+ concentration is at least an order of magnitude less than predicted from the previously measured Nernst potential. With exposure to increasing extracellular PCO2, there is a polynomial decrease in pHi. The pHi tended to be more alkaline in SO2-4 -Ringer, suggesting the presence of a HCO-3/Cl- exchange mechanism. The ATP concentration is critically and reversibly dependent on PO2. ADP concentrations were consistently low in well-oxygenated conditions. Variable but small quantities of phosphocreatine were detected. These studies demonstrate further the potential importance in utilizing NMR spectroscopy to examine coupling of biochemical substrates to epithelial transport processes.

Studies of the effect of sodium tripolyphosphate on frozen shrimp by physicochemical analytical methods and Low Field Nuclear Magnetic Resonance (LF 1H NMR)

LWT ◽  
2013 ◽  
Vol 50 (2) ◽  
pp. 401-407 ◽  
Author(s):  
Carla da Silva Carneiro ◽  
Eliane Teixeira Mársico ◽  
Roberta de Oliveira Resende Ribeiro ◽  
Carlos Adam Conte Júnior ◽  
Thiago Silveira Álvares ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
1H Nmr ◽  
Analytical Methods ◽  
Sodium Tripolyphosphate ◽  
Low Field ◽  
Frozen Shrimp ◽  
Nuclear Magnetic

Thermal-oxidation study of biodiesel by proton nuclear magnetic Resonance (1H NMR)

Fuel ◽  
2020 ◽  
Vol 274 ◽  
pp. 117833
Author(s):  
Ana Carolina Gomes Mantovani ◽  
Letícia Thaís Chendynski ◽  
Diego Galvan ◽  
Fernando César de Macedo Júnior ◽  
Dionísio Borsato ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Thermal Oxidation ◽  
1H Nmr ◽  
Proton Nuclear Magnetic Resonance ◽  
Oxidation Study ◽  
Nuclear Magnetic
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