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NMR relaxation time investigation of highly diluted aqueous solutions of silica-lactose
- Publication Year :
- 2021
- Publisher :
- Elsevier Science B.V., 2021.
-
Abstract
- The aim of the present investigation was to replicate a study published by Demangeat in 2010 in the Journal of Molecular Liquids. We measured 20 MHz longitudinal (T1) and transverse (T2) proton relaxation of H2O in highly diluted silica-lactose (Sil/Lac) solutions in 0.15 M LiCl in water (Sil/Lac C6–C24, range 10−7 M–10−47 M). The samples were prepared by repetitive succussion and centesimal dilution under rigorously controlled laboratory conditions. Lactose solutions in 0.15 M LiCl in water (Lac C6–C24) were identically and simultaneously treated, as controls. Neither for lactose (Lac) nor for Sil/Lac solutions did T1 and T2 relaxation parameters show a significant correlation with increasing dilution level. A cross-correlation analysis of T1 and T2 revealed a significant negative correlation for both Sil/Lac and LiCl samples, which changed to positive after placing the tubes for 10 min in boiling water. These results diverge from those obtained in the study of Demangeat. In our investigation, the process of potentisation (repetitive succussion and dilution) seems to be responsible for the modifications of proton relaxation times, irrespective of the presence of silica. We hypothesise that succussion intensity during dilution is a crucial factor that needs to be investigated in more detail in future investigations.
- Subjects :
- Aqueous solution
Proton
Relaxation (NMR)
Analytical chemistry
02 engineering and technology
Significant negative correlation
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Atomic and Molecular Physics, and Optics
0104 chemical sciences
Electronic, Optical and Magnetic Materials
Dilution
chemistry.chemical_compound
chemistry
Boiling
T2 relaxation
Materials Chemistry
Physical and Theoretical Chemistry
Lactose
0210 nano-technology
610 Medizin und Gesundheit
Spectroscopy
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....2d683a5be642495cdaf0ce3975481918
- Full Text :
- https://doi.org/10.48350/160616